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    Wyświetlanie 1-43 z 43
    Tytuł:
    The genus Oschmarinolepis Spassky et Spasskaja, 1954 (Cestoda, Cyclophyllidea), history of studying, and the most recent species structure
    Autorzy:
    Kornyushin, V.
    Greben, O.
    Mariaux, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/6103.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    Oschmarinolepis
    cestode
    Oschmarinolepis microcephala
    parasite
    Cestoda
    Cyclophyllidea
    species structure
    Źródło:
    Annals of Parasitology; 2016, 62, Suppl.
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Implication of forest zonation on tree species composition, diversity and structure in Mabira Forest, Uganda
    Autorzy:
    Weldemariam, E.C.
    Jakisa, E.S.
    Ahebwe, D.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/9997.pdf
    Data publikacji:
    2017
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    forest zonation
    management zone
    tree
    woody species
    plant species
    species composition
    species diversity
    species structure
    Mabira Forest Reserve
    Uganda
    Opis:
    The study aimed to investigate effectiveness of forest management zoning in conserving biodiversity of Mabira forest reserve. The study sites buffer, production, and strict nature reserve management zones were purposively selected. This was undertaken through investigating woody species diversity, composition and structure. A total of 60 sampling plots with a size of 20 m x10 m were used to collect vegetation data. Variables such as woody plant species identification and counts as well as diameter at breast height (DBH) of trees were done. The result depicted a total of 65 woody species; 39 in buffer, 19 in productions and 37 in strict nature reserve. Of these, only 9 trees species were found common to all zones and their Sorensen similarity coefficient was 0.2213. The population structure of the buffer and strict nature reserve zones was found to be a J - shape pattern, whereas the production zone shown an inverted J-shape pattern. Higher woody species diversity was depicted in the buffer and strict nature zones with (H’=2. 73512) and (H’=2. 68412) respectively, and lower in a production zone (H’=1. 63628). The evenness index value of a buffer zone was (J =0. 746574), strict nature (J= 0.743335) and production (J=0. 555719). The production zone had shown higher IVI values followed by buffer and strict nature reserve zone. The most important woody species identified based on their IVI value were Broussonetia papyrifera (Production), Acalypha neptunica (Buffer), Funtumia Elastica (strict nature reserve). The existing forest management is effective in conserving the biodiversity of the forest reserve. Nevertheless, the production zone was still suffering from exploitation of the surrounding community, hence serve for protecting the remaining management zones from further human interference. Further investigation is also required on the adjacent community perceptions of the forest management zoning.
    Źródło:
    Environment, Earth and Ecology; 2017, 1, 1
    2543-9774
    2451-4225
    Pojawia się w:
    Environment, Earth and Ecology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fish biomass and species composition in the Malta Reservoir, Poland
    Biomasa i struktura gatunkowa ichtiofauny Zbiornika Maltańskiego
    Autorzy:
    Andrzejewski, W.
    Szlakowski, J.
    Mastyński., J.
    Mazurkiewicz, J.
    Godlewska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/293014.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    ichtiofauna
    struktura gatunkowa
    zagęszczenie biomasy
    Zbiornik Maltański
    biomass estimates
    ichthyofauna
    Malta Reservoir
    species structure
    Opis:
    In the Malta Reservoir a total of 16 fish species belonging to six families were recorded in 2008. In the Nordic multi-mesh gillnets 4528 fish belonging to 11 species, with the total weight of 149.5 kg, were caught. The total beach seine catch was 34348.9 kg, which in terms of the reservoir area of 64 ha amounted to biomass density 536.7 kg·ha-¹. Of 11 species caught with the beach seine roach (Rutilus rutilus) was the most abundant species (485031 fish, 7578 individuals·ha-¹) with the highest share in biomass (24283.4 kg, 70.7%). The average electric catch at two sampling sites in the Cybina River running in the reservoir bowl was 105 kg (which gave estimate of 2.6 ton in all), with a marked dominance of the roach, which constituted 65.4% of fish catch in weight and 93% in numbers. Taking under consideration the results of electrofishing the estimated fish density in the Malta Reservoir in 2008 could reach as much as 577.7 kg·ha-¹. The proportion of predatory fish in the fish assemblage biomass was 20.1%.
    Badania ichtiofauny w Zbiorniku Maltańskim przeprowadzono w 2008 r. w trzech etapach: (1) we wrześniu i w październiku z wykorzystaniem palenowych wontonów badawczych (Nordic gillnets); (2) w październiku i listopadzie w trakcie kolejnego odwodnienia zbiornika ryby były odławiane przez brygadę rybacką za pomocą przywłoki; (3) w listopadzie, po całkowitym odwodnieniu zbiornika, na dwóch stanowiskach w korycie Cybiny, biegnącym w czaszy zbiornika przeprowadzono elektropołowy. W trakcie badań każdorazowo oznaczano gatunki ryb, ich liczbę i masę. W Zbiorniku Maltańskim w 2008 r. stwierdzono występowanie 16 gatunków ryb, należących do sześciu rodzin. W wontony nordyckie złowiono 4528 sztuk ryb, należących do 11 gatunków, o łącznej masie 149,5 kg. Udział płoci, gatunku dominującego w tych połowach, wyniósł 64,5% liczebności połowu i 38,8% jego masy. Udział kolejnych dwóch gatunków, tj. okonia i jazgarza, wyniósł odpowiednio 16,8 i 11,5% liczebności oraz 25,8 i 4,5% masy. W odłowach przywłoką łącznie pozyskano 34 348,9 kg ryb, co w przeliczeniu na hektar powierzchni zbiornika, wyniosło 536,7 kg·ha-¹ (powierzchnia 64 ha). Dominantem pod względem liczebności (485 031 szt., 7578 szt.·ha-¹) i biomasy (24 283,4 kg, 70,7%) była płoć. Udział drugiego pod względem liczebności i biomasy okonia wyniósł 8,9% (3062,5 kg), a jego zagęszczenie wyniosło 1590 szt.·ha-¹. Masa ryb z elektropołowów w korycie Cybiny wynosiła średnio 105 kg. W połowach dominowała płoć, stanowiąc 93% liczebności i 65,4% jego masy. Udział okonia i sandacza wyniósł odpowiednio 3% i 0,6% liczebności oraz 4,7% i 27,8% masy. Zagęszczenie biomasy ichtiofauny Zbiornika Maltańskiego podczas całkowitego odwodnienia w 2008 r. wyniosło 536,7 kg·ha-¹, a po uwzględnieniu wyników elektropołowów - 577,7 kg·ha-¹. Było ono znacznie większe, w stosunku do średniej ze wszystkich dotychczasowych odwodnień (362,2 kg·ha-¹). Udział ryb drapieżnych w biomasie ichtiofauny wyniósł 20,1%, natomiast gatunków niedrapieżnych - 79,9%.
    Źródło:
    Journal of Water and Land Development; 2010, 14; 67-82
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An attempt to control natural focus of leptospirosis grippotyphosa by rodenticide - a long-term study [1977-2004]
    Autorzy:
    Bakoss, P
    Jarekova, J.
    Labuda, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/50015.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    public health
    disease
    economic problem
    control
    man
    natural focus
    species structure
    animal
    small mammal
    leptospirosis
    terrestrial mammal
    rodenticide
    Opis:
    The purpose of the study was to suppress a known natural focus of fi eld fever exerting an infl uence on animal hosts of leptospires – small terrestrial mammals (s.t.m.) by rodenticide. After repeated application of the zinc phosphide rodenticide, the s.t.m. were regularly live-trapped and checked for leptospirosis by dark-fi eld microscopy and culture of their renal tissue and serological examination. Isolated leptospira strains were typed by help of rabbit factor sera. The deratization infl uenced the s.t.m. structure considerably: the proportion of the dominant Microtus arvalis subjects – the main reservoirs of Leptospira kirschneri serovar Grippotyphosa – were gradually and substantionally reduced and, contrarily, the percentage of the potetial hosts subjects – Clethrionomys glareolus and Apodemus fl avicollis – rose decisively over time. Changes in culture and serological positivity for leptospirosis of s.t.m. have also been enregistered. The highest original infestation of M. arvalis have slowly but strongly decreased while that of C. glareolus and A. fl avicollis has increased decisively and reached its maximum within the last years of investigation. It is probable that these two animal species have undertaken the leading role in the maintenance of the natural focus of the fi eld fever. In other animal species analogous trends were not registered. Based on these long-term fi ndings, there exists the possibility to suppress only partially and temporarily the epizootic process of leptospirosis in a natural focus that can be desirable in some circumstances (building or free time activities, etc.).
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2007, 14, 1
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Roznorodnosc gatunkowa drzew i krzewow oraz ocena prawidlowosci ich doboru na terenie Elektrowni 'Szczecin'
    Autorzy:
    Lysko, A
    Kiepas-Kokot, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/795538.pdf
    Data publikacji:
    2006
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    zielen miejska
    struktura gatunkowa
    tereny przemyslowe
    drzewa
    Elektrownia Szczecin
    krzewy
    urban green
    species structure
    industrial area
    tree
    Szczecin Power Plant
    shrub
    Opis:
    W niniejszej pracy scharakteryzowano strukturę gatunkową zieleni drzewiastej i krzewiastej na terenie Elektrowni „Szczecin”, ze wskazaniem na gatunki dobrze znoszące trudne warunki obszaru przemysłowego. W obszarze badań stwierdzono występowanie 58 gatunków i odmian drzew reprezentowanych przez 415 egzemplarzy oraz 49 gatunków i odmian krzewów, reprezentowanych przez 419 egzemplarzy. Wśród drzew i krzewów na tym terenie dominują liściaste, ze znaczącym udziałem (1/3) iglastych. Zieleń zakładowa mimo trudnych lokalnych warunków środowiskowych charakteryzuje się dobrym stanem zdrowotnym.
    A typical structure of trees and shrubs in the area of „Szczecin” Power Plant with the indication of species well enduring hard industrial condition of this specific area is presented in this paper. In the studied area there were 58 species of trees represented by 415 individuals and 49 species of shrub represented by 419 individuals. Among all trees and shrubs species leafy species predominated, with a significant participation (1/3) of coniferous. In spite of hard local environmental conditions the industrial green of the „Szczecin” Power Plant was characterized by good health condition.
    Źródło:
    Zeszyty Problemowe Postępów Nauk Rolniczych; 2006, 515; 267-272
    0084-5477
    Pojawia się w:
    Zeszyty Problemowe Postępów Nauk Rolniczych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Określenie składu gatunkowego lasów Góry Chojnik (Karkonoski Park Narodowy) z wykorzystaniem lotniczych danych hiperspektralnych APEX
    Identification of tree species in Mt Chojnik (Karkonoski National Park) forest using airborne hyperspectal APEX data
    Autorzy:
    Raczko, E.
    Zagajewski, B.
    Ochtyra, A.
    Jarocińska, A.
    Marcinkowska-Ochtyra, A.
    Dobrowolski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/989774.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Karkonoski Park Narodowy
    gory
    Chojnik
    lasy
    sklad gatunkowy
    metody badan
    teledetekcja
    pomiary hiperspektralne
    skaner APEX
    svm classification
    apex hyperspectral data
    species structure
    Opis:
    We used hyperspectral data from APEX scanner (288 spectral bands in 380−2500 nm spectral range; 3,5 m spatial resolution) to classify five tree species occurring in the area of Mt. Chojnik in the Karkonoski National Park (south−western Poland). Data used to delimit learning and verification polygons were acquired during field research in August 2013, when ground truth polygons were acquired using device equipped with GPS receiver. Raw APEX data went through radiometric and geometric correction at VITO office. To reduce processing time, 40 most informative bands were selected using information content analysis. The Support Vector Machines (SVM) algorithm was used for classification of the following tree species: Fagus sylvatica L., Betula pendula Roth, Pinus sylvestris L., Picea alba L. Karst and Larix decidua Mill. Final classification had 78.66% overall accuracy with Kappa coefficient equal to 0.71. The best classified species included beech (87.09%) and pine (83.96%), while the worst results were obtained for larch (60.29%). Low accuracy for larch could be caused by the fact that most of larch trees in the research area grow in small patches, which made it hard to specify large enough sample of training data. All classified tree species had producer's accuracy of at least 60%, with the highest value reaching 87%. User's accuracies were from 53% for pine to 85% for beech. It is possible to classify tree species using hyperspectral data with moderate to high accuracy even if the data used lacked atmospheric correction. Further work will focus on improving the classification accuracy and use of neural networks based classification methods. Results from this paper will serve as basis for tree species map of the Karkonoski National Park.
    Źródło:
    Sylwan; 2015, 159, 07; 593-599
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sprzedaż drewna w nadleśnictwach Puszczy Białowieskiej w latach 2008-2015
    Sale of timber in forest districts of the Bialowieza Forest in 2008-2015
    Autorzy:
    Lachowicz, H.
    Zastocki, D.
    Sadowski, J.
    Moskalik, T.
    Nietupska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/985928.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Puszcza Bialowieska
    gospodarka lesna
    nadlesnictwa
    Nadlesnictwo Bialowieza
    Nadlesnictwo Browsk
    Nadlesnictwo Hajnowka
    surowce drzewne
    drewno
    sortymenty drewna
    sprzedaz drewna
    bialowieża forest
    timber sales
    assortment and species structure
    Opis:
    The structure of timber sales in forest districts of the Białowieża Forest in the years 2008−2015 is presented. The Białowieża Forest is one of the most valuable natural areas in Europe. The data from the reports generated by the State Forests Information System of the Hajnówka, Browsk and Białowieża forest districts were used for the research. The information contained in the forest management plans and nature conservation programs of the surveyed forest districts was also used. The volume of the sold merchantable timber in the Białowieża Forest amounted to 669,072 m3, of which 63.43% was softwood and 36.57% hardwood. Among the softwood assortment, sales of the large−sized timber amounted to 44.42%, while of the medium−sized timber to 55.58%. For the large−sized hardwood, the share of sales amounted to 30.66%, while for the medium−sized hardwood to 69.34%. The small−sized timber was sold at 22,389 m3, with the share of hardwood assortments being 82%, and of softwood 18%. A small share in the sales of small−sized timber is caused by the lack of FSC certification by forest districts, which excludes large industrial companies that buy predominantly the medium−sized coniferous timber assortments. The average price obtained from the sale of timber in the the Białowieża Forest in the analysed period was 134.7 PLN/m3. At a price higher than the average, wood was sold in the Białowieża and Hajnówka forest districts, while in the Browsk Forest District the timber was sold at a price lower than the average. The total volume of merchantable timber harvested in the forest districts of the Białowieża Forest in the analysed years, including the small−sized timber, amounted to 686,684 m3, with 691,461 m3 of timber being sold. The volume of the merchantable timber sold at that time was 669,072 m3, which constituted only 0.24% of the total timber sold at the State Forests in Poland.
    Źródło:
    Sylwan; 2018, 162, 11; 949-954
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rozpad drzewostanów świerkowych w Beskidzie Żywieckim
    Dieback of Norway spruce stands in the Beskid Zywiecki Mts.
    Autorzy:
    Dmyterko, E.
    Bruchwald, A.
    Mionskowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/979601.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Beskid Zywiecki
    drzewostany swierkowe
    rozpad drzewostanow
    swierk pospolity
    Picea abies
    struktura drzewostanu
    struktura wiekowa
    struktura gatunkowa
    pozyskiwanie drewna
    struktura pozyskania
    zagrozenia lasu
    wiatry
    szkody od wiatru
    forest dieback
    picea abies
    species structure
    age structure
    timber harvest
    threat to forests by wind
    Opis:
    In the Beskid Żywiecki, the combination of abiotic, biotic and anthropogenic factors unfavourable for the growth of trees led to the dieback of spruce stands. The intensification of this process began after the hurricane in November 2004, followed by years of negative climatic water balance. The deterioration of tree growth conditions occurred after the drought in July 2006 and damage caused by the Kyril hurricane in January 2007. The weakened spruces were attacked by the bark beetles, the outbreak of which caused a massive dieback of spruce stands. In order to assess the volume of harvested timber in years 2004−2016, the volume of allowable cut (model volume) was calculated from the stand growth model for each forest district of Beskid Żywiecki. The comparison of the volume of harvested timber with the model volume allowed to determine the rate of dieback of spruce stands. The volume of harvested timber in 2007−2009 exceeded the model volume even 2.5 times. The cuts included mainly deadwood, wind−broken and wind−fallen trees, while the harvest of live trees was scarce. In the period 2010−2013, the harvested volume of live trees accounted for 50−70% of the model volume, the volume of deadwood in the same period was ca. 100% and additionally the volume of blown−down timber after the hurricane was 20−40% of the model volume, which taken together accounted approximately to 200% of the model volume. The execution of such harvesting operations, including silvicultural tasks, did not allow to carry out optimal forest management. The period 2010−2013 saw a downward trend. It was disrupted by the hurricane in December 2013, after which the volume of harvested timber, consisting mainly of wind−broken and wind−fallen trees, increased to 280% of the model volume. Again, the high volume of harvested timber was noted in 2016, (ca. 220% of the model volume). The process of damage to spruce stands in Beskid Żywiecki is likely to continue. A decline in its intensity may occur in the absence of old stands, which to a large extent already takes place in the forests of the Węgierska Górka Forest District. Currently, the most threatened by wind are forests in Ujsoły, Jeleśnia and Nowy Targ forest districts. The least threatened are forests in the Węgierska Górka. This forest district and in the future the remaining forest districts of Beskid Żywiecki, will face enormous challenges to obtain high yield and appropriate species composition.
    Źródło:
    Sylwan; 2019, 163, 02; 130-140
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microspatial structure of the seed bank of xerothermic grassland - intracommunity differentiation
    Autorzy:
    Czarnecka, J
    Powiązania:
    https://bibliotekanauki.pl/articles/56952.pdf
    Data publikacji:
    2004
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    microspatial structure
    spatial structure
    intracommunity differentiation
    species diversity
    seed bank
    xerothermic grassland
    Opis:
    The study analyses the quantity and spatial structure of the seed bank of the xerothermic grassland located in the Biała Góra near Tomaszów Lubelski (Central Roztocze Region). The seed stock of the bank was compared with the vegetation found in two different patches of the examined grassland. The number of seeds per square meter was estimated at 5328 and 5355, depending on the patch. The seed bank's spatial organisation is clustered. The most important factors determining this spatial distribution are: remaining of the seeds in close vicinity of parent plants, and the "group" dispersal of the seeds and fruits.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2004, 73, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nectary structure in Symphyglossum sanguineum [Rchb.f.] Schltr. [Orchidaceae]
    Autorzy:
    Stpiczynska, M
    Davies, K L
    Powiązania:
    https://bibliotekanauki.pl/articles/27228.pdf
    Data publikacji:
    2006
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    Symphyglossum sanguineum
    ornithophilous orchid
    Orchidaceae
    orchid species
    pollination
    nectary structure
    Opis:
    Ornithophily occurs in a great number of orchid species but despite this, researchers have largely neglected to investigate their nectaries. The aim of this study is to describe the nectary structure of Symphyglossum sanguineum, a species presumed to be pollinated by hummingbirds. The nectary is located at the free margins of auricles, which form a channel for the passage of nectar. The nectary, which consists of a single-layered epidermis and 2-3 layers of subepidermal cells, is supplied by collateral, vascular bundles. The nectary cells of S. sanguineum, like those of other ornithophilous orchids, have thick cellulose cell walls. A remarkable feature of these nectary cells is the dissolution of the middle lamella and the subsequent separation of epidermal cells. It is possible that this latter process facilitates the flow of the nectar to the nectary surface. The cuticle covering the nectary epidermis has micro-channels, but unlike the other species of ornithophilous orchids studied to date, it neither becomes disrupted nor detached from the epidermal cells. Abundant mitochondria, lipid droplets and smooth endoplasmic reticulum (SER) with an osmiophilic material are present in the cytoplasm of nectary cells. Some plastids with few lamellae contain numerous vesicles and osmiophillic globules whereas others accumulate starch. SER lamellae are often closely associated with plastids and the contents of the former organelles closely resemble osmiophillic globules. Secretory vesicles are common, especially near the outer, tangential wall indicating that granulocrine secretion possibly occurs in S. sanguineum.
    Ornitofilia występuje u wielu Orchidaceae, lecz nektarniki storczyków zapylanych przez ptaki rzadko są przedmiotem badań. Celem niniejszej pracy było zbadanie struktury nektarników Symphyglossum sanguineum, gatunku przypuszczalnie zapylanego przez kolibry. Nektarnik w kwiatach S. sanguineum znajduje się na wolnych krawędziach auriculi, które są wytworem warżki. Auricule tworzą kanal, przez który przesącza się nektar na powierzchnię labellum. Nektarnik zbudowany jest z jednowarstwowej epidermy i 2-3 warstw komórek subepidermalnych. Jest on zaopatrywany przez kolateralne wiązki przewodzące. Komórki nektarnika S. sanguineum mają grube celulozowe ściany komórkowe. Charakterystyczną cechą nektarnika jest rozpuszczenie blaszek środkowych w ścianach niektórych komórek epidermy wydzielniczej, co powoduje ich rozsunięcie. Przypuszczalnie proces ten ułatwia przesączanie się nektaru na powierzchnię nektarnika. Kutykula pokrywająca komórki epidermy wydzielniczej ma mikrokanaliki, lecz w przeciwieństwie do komórek nektarników innych dotąd badanych ornitofilnych storczyków, nie pęka ani też nie tworzy uwypukleń pod wpływem wydzielanego nektaru. Cytoplazma komórek wydzielniczych zawiera liczne mitochondria, krople lipidowe i gładkie retikulum endoplazmatyczne (SER) wypełnione osmofilnym materiałem. Niektóre plastydy w komórkach nektarnika mają nieliczne tylakoidy i pęcherzyki oraz osmofilne globule, podczas gdy w innych plastydach znajdują się ziarna skrobi. Błony SER są w kontakcie z plastydami, a osmofilny materiał zawarty w SER przypomina ciemno wybarwione globule w plastydach. Liczne pęcherzyki wydzielnicze w sąsiedztwie ściany komórkowej wskazują na możliwość sekrecji pęcherzykowej.
    Źródło:
    Acta Agrobotanica; 2006, 59, 1
    0065-0951
    2300-357X
    Pojawia się w:
    Acta Agrobotanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Can sexual behaviour serve to identify species? An example of two slugs of the genus Deroceras
    Autorzy:
    Czyz, M.
    Reise, H.
    Hutchinson, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/84057.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
    Tematy:
    sexual behaviour
    identify species
    slug
    Deroceras
    morphology
    genital structure
    copulation
    Źródło:
    Folia Malacologica; 2012, 20, 1
    1506-7629
    Pojawia się w:
    Folia Malacologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    First data of age, condition, growth rate and diet of invasive Neogobius melanostomus (Pallas, 1814) in the Pomeranian Bay, Poland
    Autorzy:
    Rybczyk, Agnieszka
    Czerniejewski, Przemysław
    Keszka, Sławomir
    Janowicz, Mariola
    Brysiewicz, Adam
    Wawrzyniak, Wawrzyniec
    Powiązania:
    https://bibliotekanauki.pl/articles/1844420.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    diet
    fish alien species
    Gobidae
    growth rate
    Pomeranian Bay
    population structure
    Opis:
    Round goby (Neogobius melanostomus (Pallas, 1814)) is an invasive species in the Oder River. In this study, age of 147 fish was determined using scales and otoliths, and the Fraser-Lee back-calculation method was used for population structure and theoretical length growth rates with 3 mathematical models of growth: von Bertalanffy, Ford–Walford and 2nd degree polynomial. Fish condition was determined using Fulton, Le Cren and Clark equations. Average total length and weight of fish was 162.00 mm and 83.00 g, respectively. Males were more abundant than females, representing 70% of the fish caught, and achieved greater total lengths and weights. Age 2+ dominated females and 3+ males age groups. Of the three mathematical models used to estimate fish growth, the 2nd degree polynomial model had the best fit to back-calculated lengths. Males had slightly higher growth rates than females in the first two years of life but comparable in subsequent years. The diet consisted of various benthic organisms that varied with fish age. The most frequently occurring food component was Dreissena polymorpha, which accounted for approximately 70% in the diet of fish with a body length greater than 191 mm.
    Źródło:
    Journal of Water and Land Development; 2020, 47; 142-149
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Temporal variation in species composition, diversity and regeneration status along altitudinal gradient and slope: The case of Chilimo dry Afromontane forest in the Central Highlands of Ethiopia
    Autorzy:
    Tesfaye, Mehari A.
    Gardi, Oliver
    Blaser, Jűrgen
    Powiązania:
    https://bibliotekanauki.pl/articles/1046543.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Abundance
    Ethiopia
    altitude gradient
    native species
    population structure
    saplings
    seedlings and shrubs
    Opis:
    This study is aimed towards investigating the temporal variation in species composition, diversity and regeneration status of Chilimo dry Afromontane forest in the Central Highlands of Ethiopia. A total of 35 permanent sample plots of 20 m × 20 m (400 m2) each were established in the natural forest, laid out on transects of altitudinal gradients, with a distance of 100m between plots. The plots were measured twice in 2012 and 2017. Three subplots, 5m × 5m, and 1 m2 were laid out inside the main plots for sapling, shrub and seedling data collection. Species composition, diversity, important value index (IVI) and regeneration data were analyzed using appropriate formulas. Data analysis was made using R - studio software. A total of 31 trees and shrubs representing 25 families were recorded, 20 (64.52 %) were trees and 11 (35.48 %) were shrubs. Thereof, 28, 23 and 26 species under highest, middle and lowest altitudinal gradient were recorded. The most dominant tree species were: Juniperus procera, Podocarpus falcatus, Olea europea, Scolopia theifolia and Allophyllus abyssinicus. The species composition, diversity, abundance, dominance and important value index significantly varied among species, altitudinal gradient and slope. The diameter distribution was an inverted J - shaped distribution pattern. The highest species richness and diversity index were found under middle altitudinal gradient, while the lowest species richness and diversity index were found under the highest altitudinal gradient. The mean annual volume increment ranged from 4.223 to 0.228 m3 ha-1 yr-1, while the basal area increment varied from 0.85 to 0.020 m2 ha-1 yr-1. Among the sampled species, ten species had fair, 5 poor and 14 species had no regeneration. In conclusion, the Chilimo dry Afromontane forest is suffering from low recruitment and regeneration. Thus, appropriate forest management options should be implemented.
    Źródło:
    World Scientific News; 2019, 138, 2; 192-224
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Additional observations on the Jurassic belemnoids of Poland
    Dodatkowe badania nad belemnitami jurajskimi w Polsce
    Dopolnitel'nye issledovanija jurskikh belemnitov v Pol'she
    Autorzy:
    Pugaczewska, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/22567.pdf
    Data publikacji:
    1965
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    paleontology
    Jurassic
    belemnoid
    Belemnopsis wiekensis
    new species
    Belemnopsinae
    ontogenesis
    structure
    rostrum
    Polska
    Źródło:
    Acta Palaeontologica Polonica; 1965, 10, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Body size, condition, growth rate and parasite fauna of the invasive Perccottus glenii (Actinopterygii: Odontobutidae) from small watercourse in the Vistula River basin, Poland
    Autorzy:
    Czerniejewski, Przemysław
    Linowska, Angelika
    Brysiewicz, Adam
    Kasowska, Natalia
    Powiązania:
    https://bibliotekanauki.pl/articles/293036.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    age and growth
    Amur sleeper
    Habdziński Canal
    invasive species
    parasites
    population structure
    Opis:
    For the last few decades there have been reports not only of the occurrence of new invasive species of European watercourses, but also their increasing expansion. One of such species is the Amur sleeper (Perccottus glenii). The present work contains assessment of age and length distribution, condition as well as growth rate and analysis of the parasite fauna of the Amur sleeper from the waters of the Vistula River tributary in its middle course (the Habdziński Canal). During the catch performed in 2017 and 2019, the total of 177 Amur sleepers were recorded in the studied watercourse and a statistically significant sex structure disproportion was observed. Among the specimens caught in 2017 dominant were fishes with lengths of 50.1–60.1 mm whereas in 2019 the majority of the Amur sleeper specimens measured 30.1–50.0 mm. Six age groups were recorded among the caught fish with a clear prevalence of specimens aged 1+ (70.06%). The most frequently recorded parasite of P. glenii was non-quantifiable Trichodina rostrata ciliate for which the Amur sleeper from the Polish waters appeared to be a new host. Moreover, the presence of an acanthocephalan Acanthocephalus lucii, not recorded in Poland in this host before, was observed in the chyme. Also, accidental presence of larvae of the Opisthioglyphe ranae tremadote, which is a parasite typical of amphibians, was also recorded. Despite unfavourable habitat conditions and increased volumes of biogenic substances in the waters of the Habdziński Canal, the Amur sleeper found convenient conditions to reside in this small watercourse.
    Źródło:
    Journal of Water and Land Development; 2020, 44; 33-42
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Oxidation of short-chain isoprenoids
    Autorzy:
    Siedlecka, J.
    Sosinska, E.
    Kania, M.
    Kaczorowska, E.
    Cmoch, P.
    Masnyk, M.
    Lozinska, I.
    Derewiaka, D.
    Obiedzinski, M.
    Czarnocki, Z.
    Danikiewicz, W.
    Swiezewska, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/80737.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    conference
    isoprenoid
    short-chain isoprenoid
    molecular structure
    oxidation
    reactive oxygen species
    ultraviolet light
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ground beetle assemblages (Coleoptera, Carabidae) of the Krasiborska Kępa reserve
    Autorzy:
    Aleksandrowicz, Oleg
    Zawal, Andrzej
    Śmietana, Przemysław
    Powiązania:
    https://bibliotekanauki.pl/articles/1386042.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
    Tematy:
    assemblage structure
    Carabidae
    fens
    ground beetles
    Krasiborska Kępa reserve
    NW Poland
    species richness
    Opis:
    The study was carried out from the beginning of June to the end of July 2005 in the Krasiborska Kępa reserve (UTM VV56; 53.848°N, 14.370°E). Three research plots were established, representing various types of use of reedy areas: an unused reedy area, a reedy area mown in summer, and an area mown in winter. Beetles were collected in Barber traps with ethylene glycol as a preservative liquid. Seven traps were set up in each examined habitat. In total 1,145 specimens belonging to 35 species were caught. The relatively small area presented three different carabid assemblages, differing in species richness, abundance, dominance structure and ecological preferences. The highest species richness and abundance, as well as the largest representation of endangered stenobiontic hygrophilous bog species (Trechus rivularis, Carabus clathratus, Carabus menetriesi, Bembidion fumigatum, Blethisa multipunctata, and Oodes helopioides), were observed in the  periodically flooded fen which was mowed in the winter.
    W wyniku badań przeprowadzonych w czerwcu i lipcu 2005 roku, na trzech stanowiskach o charakterze torfowiskowym w północno-wschodniej części rezerwatu Karsiborska Kępa zebrano 1145 osobników należących do 35 gatunków. Na względnie małym terenie występują trzy różnych zgrupowania biegaczowatych. Różnice polegają na bogactwie gatunkowym, liczebności, strukturze dominacji i preferencjach ekologicznych. Największe bogactwo gatunkowe i liczebność, oraz największa reprezentacja przyrodnicza cennych stenobiontycznych higrofilnych torfowiskowych gatunków (Trechus rivularis, Carabus clathratus, Carabus menetriesi, Bembidion fumigatum, Blethisa multipunctata, Oodes helopioides) znajdowała się na stanowisku 3 – okresowo zalewanym torfowisku niskim, koszonym w okresie zimowym.
    Źródło:
    Acta Biologica; 2016, 23; 5-13
    2450-8330
    2353-3013
    Pojawia się w:
    Acta Biologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of artificial coastal protection structures on Ascidians settlement along the Tamil Nadu coast, India
    Autorzy:
    Jebakumar, J.P.P.
    Nandhagopal, G.
    Babu, B.R.
    Ragumaran, S.
    Ramakritinan, C.M.
    Ali, A.J.
    Arshan, M.K.
    Ravichandran, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/48441.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    artificial structure
    urban sprawl
    landscape change
    non-native species
    Tamil Nadu coast
    India
    Źródło:
    Oceanologia; 2019, 61, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cochlearia polonica Frohl. (Brassicaceae), a narrow endemic species of southern Poland: history of conservation efforts, overview of current population resources and genetic structure of populations
    Autorzy:
    Cieslak, E.
    Kazmierczakowa, R.
    Ronikier, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/56510.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    Cochlearia polonica
    Brassicaceae
    endemic species
    Southern Poland
    history
    conservation effort
    current population
    population resource
    genetic structure
    genetic variation
    population structure
    Opis:
    Cochlearia polonica Fröhl. (Brassicaceae) is one of the rarest species in the Polish and European flora and a taxon endemic to a very small area in southern Poland. Due to industrial activities and subsequent transformation of habitats it was extinct in all natural localities around 1994. The persistence of the species was ensured thanks to the active protection efforts including a series of transplantations based on the material from the last and decreasing natural population. The history of conservation efforts of C. polonica provides a model example of successful active protection in the European flora. Here, we provide a complete review comprising the following aims: (i) outline of the discovery and taxonomic conceptions on C. polonica, (ii) review of conservation efforts aimed at preserving its populations, (iii) description of the existing population resources, and (iv) analysis of the genetic structure of all existing populations based on previously published data and new, supplementary results.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2010, 79, 3
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stand structure and natural regeneration of Taxus baccata at "Stiwollgraben" in Austria
    Autorzy:
    Dhar, A
    Ruprecht, H.
    Klumpp, R.
    Vacik, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/41025.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    English yew
    Taxus baccata
    yew
    tree species
    Austria
    gene conservation
    natural regeneration forest
    stand structure
    population structure
    vitality
    yew decline
    Opis:
    English yew (Taxus baccata L.) is a rare tree species in Austria and gene conservation forests reserves are used to maintain English yew populations by silvicultural treatments. This paper describes the current situation of an English yew population at “Stiwollgraben”in Austria with regard to stand structure, vitality and natural regeneration. The area is one of the most important sites in Austria as it consists of 2236 yews.The vitality condition of the yew is very good, and more than 79% of the yews have been assessed as very vital to vital. The potentiality for natural regeneration (13019 one-year seedlings ha–1) is very high, but not all height classes are represented. This indicates a high survival ability of English yew at this site. Three different treatment strategies are described to maintain the yew population. The future effects of these treatments are discussed in the light of the environmental requirements of English yew.
    Źródło:
    Dendrobiology; 2006, 56; 19-26
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure and dispersion of ectoparasites infesting artiodactylus game animals
    Autorzy:
    Lonc, E.
    Hurysz, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/839342.pdf
    Data publikacji:
    1998
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    parasite
    wild boar
    structure
    Polska
    dispersion
    Cervidae
    ectoparasite
    arthropod species
    host
    wild mammal
    tick
    Źródło:
    Annals of Parasitology; 1998, 44, 3
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phytosociological structure of Cladonio-Pinetum Juraszek 1927 of the Western Polissya of Ukraine
    Fitosocjologiczna struktura borów chrobotkowych Cladonio-Pinetum Juraszek 1927 z Polesia na terenie zachodniej Ukrainy
    Autorzy:
    Mertsalo, M.
    Soroka, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/791412.pdf
    Data publikacji:
    2017
    Wydawca:
    Wyższa Szkoła Zarządzania Środowiskiem w Tucholi
    Tematy:
    phytosociological structure
    Cladonio-Pinetum habitat
    lichen
    moss
    species composition
    pine forest
    Scotch pine
    Ukraine
    Źródło:
    Zarządzanie Ochroną Przyrody w Lasach; 2017, 11
    2081-1438
    2391-4106
    Pojawia się w:
    Zarządzanie Ochroną Przyrody w Lasach
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of undersown species on maize yielding
    Wpływ gatunku wsiewki na plonowanie kukurydzy
    Autorzy:
    Księżak, J.
    Bojarszczuk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/337022.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
    Tematy:
    maize
    Zea mays L.
    species undersown
    structure of maize plant
    kukurydza
    gatunki wsiewek
    struktura roślin
    Opis:
    The field experiment was conducted in the years 2014-2016 at AES Grabów (Mazowieckie Voivodeship), belonging to Institute of Soil Science and Plant Cultivation – State Research Institute in Puławy, (Poland) and in ecological farm in Chwałowice (Poland) in the years of 2014-2015. The trial was conducted in the randomized block method, in four replications. The following treatments were compared: control and intercrop sowings with: buckwheat, phacelia, white mustard and white clover. The inter-row cultivation of buckwheat, phacelia, white mustard and white clover had a positive effect on maize yield. On average, for the four species of the intercrops, the yield increase was 17-22%, and in Grabów, in the year with unfavorable distribution of total precipitation, this increase was significantly higher and amounted to about 60%. In the summers with favorable weather conditions (2014 and 2016), intersowing buckwheat proved the least useful in Grabów, while in the dry year, as well as in Chwałowice, this species was less competitive than maize. Intersowing different species into maize crops had a relatively small effect on the dry matter content of whole plants and cobs, while in Grabów in 2015, with unfavorable weather conditions, it had a positive effect on its content. In Grabów, the structure of maize plants was little diversified by the applied intercrop species. The lowest share of the cob was recorded in 2014. In Chwałowice, maize grown with intercrops formed cobs only in 2014. In this location, intercrops stimulated the number of grains produced per cob, while in Grabów, an intercrop species had a small impact on the number of grains per cob.
    Doświadczenie polowe przeprowadzono w latach 2014-2016 w RZD Grabów (woj. mazowieckie), należącym do IUNG-PIB w Puławach, oraz w latach 2014-2015 w Pokazowym Gospodarstwie Ekologicznym w Chwałowicach, należącym do CDR Radom. Doświadczenie przeprowadzono metodą podbloków losowanych w 4 powtórzeniach. Porównywano następujące obiekty: kontrola, gatunki wsiewki: gryka, facelia, gorczyca biała, koniczyna biała. Uprawa w międzyrzędziach gryki, facelii, gorczycy białej i koniczyny białej wpływała korzystnie na plonowanie kukurydzy. Średnio dla czterech gatunków wsiewki, zwiększenie plonów wynosiło 17-22%, a w Grabowie w roku o niekorzystnym rozkładzie i sumie opadów było znacząco większe i wynosiło około 60%. W Grabowie w latach o sprzyjającym przebiegu warunków atmosferycznych (2014 i 2016) najmniej celowe było wsiewanie gryki, a w roku suchym, jak również w Chwałowicach, gatunek ten był mniej konkurencyjny dla kukurydzy. Wsiewanie różnych gatunków wsiewek w łan kukurydzy miało stosunkowo niewielki wpływ na zawartość suchej masy w całych roślinach i kolbach. Natomiast w Grabowie w roku o niesprzyjającym przebiegu pogody (2015) korzystnie wpływało na jej zawartość. W Grabowie struktura roślin kukurydzy była stosunkowo mało różnicowana zastosowanym gatunkiem wsiewki, a udział kolby był najmniejszy w 2014 roku. Natomiast w Chwałowicach, kukurydza uprawiana z wsiewkami zawiązała kolby tylko w 2014 roku. W Chwałowicach wsiewki wpływały stymulująco na liczbę wytworzonych ziaren na kolbie, a w Grabowie gatunek wsiewki miał stosunkowo mały wpływ na zaziarnienie kolby.
    Źródło:
    Journal of Research and Applications in Agricultural Engineering; 2018, 63, 2; 129-135
    1642-686X
    2719-423X
    Pojawia się w:
    Journal of Research and Applications in Agricultural Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of meat quality of selected exotic animals species
    Porównanie jakości mięsa wybranych gatunków zwierząt egzotycznych
    Autorzy:
    Balowski, M.
    Sobczak, M.
    Zochowska-Kujawska, J.
    Pytel-Zajac, O.
    Niedzwiedz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/82981.pdf
    Data publikacji:
    2015
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    comparison
    meat quality
    exotic animal
    animal species
    crocodile
    kangaroo
    muscle structure
    sensory assessment
    texture parameter
    Źródło:
    Folia Pomeranae Universitatis Technologiae Stetinensis. Agricultura, Alimentaria, Piscaria et Zootechnica; 2015, 36
    2081-1284
    Pojawia się w:
    Folia Pomeranae Universitatis Technologiae Stetinensis. Agricultura, Alimentaria, Piscaria et Zootechnica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gromadne noclegowiska błotniaków stawowych Circus aeruginosus w krajobrazie rolniczym na Wysoczyźnie Ciechanowskiej
    Communal roosting of western marsh-harriers Circus aeruginosus in the agricultural landscape of the Ciechanów Upland
    Autorzy:
    Murawski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2090097.pdf
    Data publikacji:
    2021
    Wydawca:
    Mazowiecko-Świętokrzyskie Towarzystwo Ornitologiczne
    Tematy:
    Ciechanów county
    Przasnysz county
    age structure
    sex structure
    North Mazovian Lowland
    Montagu’s Harrier Circus pygargus
    Pallid Harrier Circus macrourus
    mixed- species roosting
    Opis:
    On 22 August 2020 field observations were carried out in the agricultural landscape of the Ciechanów and Przasnysz counties. A roost of 36 individuals of the Western Marsh-harrier Circus aeruginosus was found near Golany (Przasnysz municipality, Przasnysz county) in a sugar beet field Beta vulgaris subsp. vulgaris overgrown with the common lambsquarters Chenopodium album. Next controls documented the increase in the number of harriers and on 5th September there was a group of 62-65 birds. Several Montagu’s harriers C. pygargus and an adult male of the Pallid Harrier C. macrourus were also recorded at that roosting site. The latter stayed in the area for about 3 weeks and used two roosting sites alternatively. Another roosting site was also found nearby. There were12 western marsh-harriers, 1-2 Montagu’s harriers, and the aforementioned male Pallid Harrier. On 12 September the large roost near Golany disappeared due to a beet harvest and ploughing the field. The increase in the breeding population of the Western Marsh-harrier in Poland caused by inter alia development of field populations of this species, results in the increasing number of the records of communal roosting in the agricultural landscape. Therefore, efforts should be made to develop counting methods on such roosting sites and to protect the largest regional roosts of the Western Marsh-harrier and Montagu’s Harrier.
    Źródło:
    Kulon; 2021, 26; 43-48
    1427-3098
    Pojawia się w:
    Kulon
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of phytoplankton size-structure based productivity, pigment complexes (HPLC/CHEMTAX) and species composition in the Cochin estuary (Southwest coast of India): special emphasis on diatoms
    Autorzy:
    Paul, M.
    Valappan, M.N.
    Nanappan, U.
    Gopinath, V.
    Velloth, R.T.
    Rajendran, A.
    Nair, M.
    Peariya, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078766.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    phytoplankton
    size structure
    photopigment
    species composition
    diatom
    chlorophyll a
    primary production
    seasonality
    high performance liquid chromatography
    chemotaxonomy
    India
    Opis:
    Seasonal studies on size-fractionated phytoplankton productivity (biomass and primary production), marker pigments, and species composition and abundance were carried out in the Cochin estuary (CE), located on the southwest coast of India, to identify the critical environmental factors that control the consistent preponderance of diatoms. The overall results of the study showed a significant contribution of small-sized phytoplankton, specifically nanophytoplankton (2—20 μm), to the total chlorophyll a and primary production in the estuary, regardless of seasons. Diatoms constituted the major phytoplankton taxa, showed an exceptional seasonal scale increase in numerical abundance during the post-southwest monsoon. The relative increase in fucoxanthin (biomarker of diatoms) over other marker pigments substantiated the numerical dominance of diatoms throughout the sampling periods. This is the first study in the CE in which phytoplankton marker pigments have been detected and elucidated the seasonality of functional groups based on HPLC/chemotaxonomy analytical approaches. The prevalence of high DiatDP and diatom chlorophyll a equivalent (estimated by CHEMTAX), further confirmed the preponderance of diatoms in the CE, despite the intermittent dominance of cyanophytes and cryptophytes (monsoon period). The consistent increase in SPM levels (> 25 mg L—1), established at all sampling stations, indicated that the water column turbidity might be one of the significant environmental factors hindering the growth of large-sized phytoplankton (ca. >20 μm) in the CE even if the system invariably holds high inorganic nutrients, irrespective of seasons
    Źródło:
    Oceanologia; 2021, 63, 4; 463-481
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure and dynamics of selected stands of primeval character in the Pieniny National Park
    Autorzy:
    Jaworski, A
    Podlaski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/41477.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    Pieniny National Park
    forest
    species composition
    structure
    stand
    development stage
    fir
    Abies alba
    beech
    Fagus sylvatica
    plant regression
    Opis:
    The purpose of this study was to determine changes which occurred during 23 years (1974–1997) in four stands in respect of species composition, structure, developmental stages and phases. In 1997 the Walusiowka stand represented the growing up stage, phase of a multistory structure, and during the study period its volume decreased from 698 to 676 m3/ha.The Przełęcz Sosnow stand was in the growing up stage, phase of a little diversified storied structure and regeneration, and its volume decreased from 696 to 622 m3/ha.The Grodek stand during the entire study period was in the growing up stage, phase of the selection forest structure and regeneration, and its volume increased from 529 to 585 m3/ha.The Facimiech stand in 1997 was in the optimum stage, phase of aging and regeneration, and its volume decreased from 688 to 661 m3/ha.During 1974–1997 the percentage of fir (Abies alba) considerably decreased in three stands (Walusiowka from 46 to 33%, Przełęcz Sosnow from 58 to 36%, Grodek from 42 to 24%).The Facimiech stand was almost a pure fir stand during the entire control period. In the Przełęcz Sosnow stand, due to a rapid mortality of fir and presence of vital trees of beech (Fagus sylvatica) of the growing up and optimum growth generations, the break up stage did not take place but the growing up stage had developed, which indicated the disturbance of the natural cycle of the primeval forest described by Korpel’. A scarce presence of fir upgrowth and prevalence of beech in stands composed of these two species permits to suppose that fir will be retreating in favor of beech.
    Źródło:
    Dendrobiology; 2007, 58; 25-41
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Flowering biology and pollen production of four species of the genus Rosa L.
    Biologia kwitnienia i produkcja pyłku czterech gatunków z rodzaju Rosa L.
    Autorzy:
    Zuraw, B.
    Sulborska, A.
    Stawiarz, E.
    Weryszko-Chmielewska, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/26998.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    flowering biology
    pollen production
    plant species
    Rosa
    flower
    functional morphology
    petal structure
    scent emission
    pollen mass
    pollen load
    Opis:
    Wild growing rose species are of great importance as a source of pollen for insects. Oil extracted from the petals of various Rosa species is used in perfumery, cosmetic industry, and therapeutics. In our study, we compared the flowering duration and flower lifespan, the number of stamens and pistils, the mass and size of pollen grains as well as the anatomical features of the petals of four Rosa species: R. canina, R. ×damascena, R. gallica, and R. rugosa. Moreover, we examined the pollen loads collected by bumblebees foraging on rose flowers in order to determine the attractiveness of pollen of this genus to insects. We showed the flower lifespan to vary (3.5–8 days) in the roses studied and revealed high variation in the number of stamens (82–260) and pistils (17–65) as well as in the mass of pollen produced. The flowers of R. rugosa produced the highest amount of pollen (26.7 mg per flower), while the flowers of R. canina the least (3.3 mg per flower), which is associated with differences in the number of stamens developed in the flowers between these species. The largest pollen grains were found in R. ×damascena and R. gallica. We demonstrated that R. ×damascena produces the thickest petals and that scent-emitting papillae found on the adaxial surface of the petals differ in size and shape in the rose species investigated.
    Dziko rosnące gatunki z rodzaju róża (Rosa) mają duże znaczenie jako źródło pyłku dla owadów. Uzyskiwany z płatków olejek znalazł zastosowanie w perfumerii, przemyśle kosmetycznym i lecznictwie. W pracy porównano długość okresów kwitnienia, długość życia kwiatów, liczbę pręcików i słupków, masę i wielkość ziaren pyłku oraz cechy anatomiczne płatków czterech gatunków z rodzaju Rosa: R. canina, R. ×damascena, R. gallica i R. rugosa. Wykazano różną długość życia kwiatów badanych róż (3.5–8 dni) oraz duże zróżnicowanie w liczbie pręcików (82–260) i słupków (17–65), a także w masie produkowanego pyłku. Najwięcej pyłku wytwarzają kwiaty R. rugosa (26.7 mg/kwiat), najmniej kwiaty R. canina (3.3 mg/kwiat), co jest związane w dużej mierze z różną pomiędzy gatunkami liczbą pręcików w kwiatach. Największe ziarna pyłku stwierdzono u R. ×damascena i R. gallica. Wśród badanych gatunków róż najgrubsze płatki wytwarza R. ×damascena, a występujące na doosiowej powierzchni płatków papille emitujące zapach różnią się wielkością i kształtem. Udział pyłku Rosa w obnóżach pyłkowych zebranych przez trzmiele oblatujące kwiaty róż jest dominujący i wynosi >90%.
    Źródło:
    Acta Agrobotanica; 2015, 68, 3
    0065-0951
    2300-357X
    Pojawia się w:
    Acta Agrobotanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Changes in the structure and floristic composition of the limestone grasslands after cutting trees and shrubs and mowing
    Autorzy:
    Baba, W
    Powiązania:
    https://bibliotekanauki.pl/articles/57458.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    cutting tree
    restoration
    structure
    floristic composition
    limestone grassland
    biodiversity
    change
    tree
    nature conservation
    secondary succession
    species mobility
    shrub
    Opis:
    The calcareous grasslands belong to the species-rich plant communities in Poland. Most of them are of anthropogenic origin and they need specific management (i.e. periodical cutting suckers of trees and shrubs, grazing or mowing) in order to protect their floristic diversity. Many of calcareous grasslands have been overgrown by shrubs as a result of cessation of traditional management. The aim of this study was to compare the structure and dynamics of xerothermic hazel shrub patches, which were undergoing secondary succession with patches where different management practices aiming at restoration of species-rich limestone grassland were applied. The managed plots had a significantly higher species richness than the control one. However, they strongly differed in their floristic composition from well-preserved limestone grasslands. There were also significant differences observed between both the managed plots. Too intensive management, particularly frequent mowing of herbs resulted in expansion of grass species such as Brachypodium pinnatum and Calamagrostis arundinacea and caused a sharp decline in species richness. The species composition and turnover rate strongly depended on succesional stage (soil layer thickness) of plots at the start of the experiment. The deeper was the soil, the higher was the rate of species turnover and the smaller was the share of xerothermic and thermophilous species. The last mentioned group was dominated by species with a persistent seed bank in the soil, frequently colonizing anthropogenic habitats.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2003, 72, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of DNA markers against illegal logging as a new tool for the Forest Guard Service
    Autorzy:
    Nowakowska, J.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/38611.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    application
    DNA marker
    DNA structure
    wood
    molecular identification
    Forest Guard Service
    tree species
    determination
    DNA profile
    polymerase chain reaction
    Opis:
    DNA markers are currently the most precise tool for forest tree species identification and can be used for comparative analyses of plant material. Molecular diagnosis of evidence and reference material is based on comparing the structure of DNA markers duplicated in the PCR reaction and estimation of the DNA profiles obtained in studied wood samples. For this purpose, the microsatellite DNA markers are the most suitable tool because of their high polymorphism and accurate detection of structural changes in the genome. The analysis of tree stump DNA profiles let avoid timely collection of data such as tree age, diameter, height and thickness, although such a piece of information may advantageous in wood identification process. For each examined tree species, i.e. Pinus sylvestris L., Picea abies (L.) Karst., Quercus robur L. and Q. petraea (Matt.) Liebl., Fagus sylvatica L., Betula pendula L., and Alnus glutinosa L., wood identification was possible via the DNA profiles established on a basis of minimum 4 microsatellite nuclear DNA loci, and at least one cytoplasmatic (mitochondrial or chloroplast) DNA marker. Determination of the DNA profiles provided fast and reliable comparison of genetic similarity between material of evidence (wood, needles, leaves, seeds) and material of reference (tree stumps) in the forest. This was done with high probability (approximately 98– 99%).
    Źródło:
    Folia Forestalia Polonica. Series A . Forestry; 2011, 53, 2
    0071-6677
    Pojawia się w:
    Folia Forestalia Polonica. Series A . Forestry
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phytoplankton size structure and species composition as an indicator of trophic status in transitional ecosystems: the case study of a Mediterranean fjord-like karstic bay
    Autorzy:
    Bosak, S.
    Silovic, T.
    Ljubesic, Z.
    Kuspilic, G.
    Pestoric, B.
    Krivokapic, S.
    Vilicic, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/48711.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    phytoplankton community
    size structure
    species composition
    trophic status
    ecosystem
    aquatic ecosystem
    picophytoplankton
    Adriatic Sea
    Boka Kotorska Bay
    karstic bay
    Opis:
    The species composition and size-structure of the phytoplankton community in the Boka Kotorska Bay (SE Adriatic Sea) were analysed with respect to abundance and carbon biomass, together with the physico-chemical parameters, with the aim of evaluating the predefined oligo-mesotrophic status of this transitional water ecosystem. Three stations located in the inner part of the Bay were sampled with seasonal frequency in 2008/2009. Picophytoplankton cells were counted using flow cytometry; nanophytoplankton and microphytoplankton were identified and counted by light microscopy. The relative importance of the picoplankton in the Bay, in terms of both abundance and biomass, during all the investigated seasons emphasized their significance in the phytoplankton community. Picocyanobacteria (Synechococcus) constituted a significant part of the summer assemblages with regard to both abundance (up to 3.38 × 108 cells L−1) and carbon biomass (up to 73% of total phytoplankton carbon). The contribution of the nanophytoplankton was found to be generally low (<20% of the total phytoplankton carbon) in all seasons, and was dominated by autotrophic/mixotrophic flagellates. Species with a preference towards nutrient-enriched conditions, like the diatom Skeletonema marinoi, dominated the microphytoplankton fraction. S. marinoi was the most abundant in spring/winter (up to 2.86×106 cells L−1) above the halocline (making a 96% contribution to the microphytoplankton). The potentially toxin-producing diatom Pseudo-nitzschia pseudodelicatissima was recorded at abundances greater than 105 cells L−1, together with Thalassionema frauenfeldii, as well as the dinoflagellates Prorocentrum micans and the potentially harmful P. minimum. The higher values of phytoplankton biomass and the dominance of phytoplankton species or groups with preferences for nutrient-enriched conditions appear to be consistent with the oligo-mesotrophic status of this specific ecosystem.
    Źródło:
    Oceanologia; 2012, 54, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Population structure, morphometry and individual condition of the non-native crab Rhithropanopeus harrisii (Gould, 1841), a recent coloniser of the Gulf of Gdansk (Southern Baltic Sea)
    Autorzy:
    Hegele-Drywa, J.
    Normant, M.
    Szwarc, B.
    Podluska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/49100.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Harris mud crab
    Rhithropanopeus harrisii
    non-native species
    Gdansk Gulf
    Southern Baltic Sea
    population structure
    morphometry
    condition factor
    biological invasion
    Źródło:
    Oceanologia; 2014, 56, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spergulo-Chrysanthemetum segeti [Br.-Bl. et De Leeuw 1936] R.Tx. 1937 on the Slowinskie coast
    Spergulo-Chrysanthemetum segeti [Br.-Bl. et De Leeuw 1936] R.Tx. 1937 na Wybrzezu Slowinskim
    Autorzy:
    Sobisz, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/878610.pdf
    Data publikacji:
    2006
    Wydawca:
    Uniwersytet Przyrodniczy w Poznaniu
    Tematy:
    Spergulo-Chrysanthemetum segeti
    weed
    phytosociology
    Polska
    soil complex
    spring
    community structure
    species richness
    botany
    Slowinskie Coast
    Baltic Sea
    cereal crop
    Źródło:
    Roczniki Akademii Rolniczej w Poznaniu. Botanika-Steciana; 2006, 10
    1896-1908
    Pojawia się w:
    Roczniki Akademii Rolniczej w Poznaniu. Botanika-Steciana
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of dominant species on numbers and age structure of Iris sibirica L. population on blue moor-grass meadow in Southern Poland
    Autorzy:
    Kostrakiewicz, K
    Powiązania:
    https://bibliotekanauki.pl/articles/57143.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    generative reproduction
    Iris sibirica
    clonal plant
    vegetative reproduction
    Polska
    dominant species
    age structure
    population
    blue moor-grass meadow
    seedling recruitment
    plant ecology
    Opis:
    Two populations of Iris sibirica, a clonal species protected by law in Poland, occurring in patches of Molinietum caeruleae, of similar floristic composition although with different dominant species, were studied. In the Stanisławice locality, species with a high competitive potential prevailed, contrary to the Opatkowice locality, where the species of low competitive potential dominated. It was established that vegetative propagation ensures the continued presence of populations in both localities, although the proximity of plants with high competitive potential limits the vegetative propagation of ramet clusters of Iris sibirica. Despite the high level of seed production, the recruitment of seedlings in both patches is possible only in artificially created gaps. The field observations support the conclusion that creating gaps allowing for germination of seeds and development of seedlings, as well as eliminating expansive neighbours allowing proliferation of ramet clusters of Iris sibirica, is an affective way of protecting populations of this species.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2007, 76, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The population structure and regeneration of Sorbus torminalis in Hadecka planinka National Nature Reserve (Czech Republic)
    Autorzy:
    Madera, P.
    Kohoutek, M.
    Senfeldr, M.
    Repka, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/41463.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    population structure
    regeneration
    Sorbus torminalis
    wild service tree
    age structure
    forest system
    species protection
    chequer tree zob.wild service tree
    checker tree zob.wild service tree
    Hadecka Planinka National Nature Reserve
    Czech Republic
    Opis:
    We performed a detailed overall field survey of all specimens of the wild service tree Sorbus torminalis (L.) Crantz in the research area in the Hádecká planinka National Nature Reserve. This research area, with an area of 80 ha, contains one of the largest populations of the tree in Europe. In all, 1713 specimens were found. This study provides a detailed description of the wild service tree population in the area. The basic biometric parameters (height, GBH, social position, fertility) of thepopulation were assessed. The main emphasis of our analysis was to evaluate the population's age structure. We used estimates of age structure based on the Chapman-Richards growth function to perform this evaluation. During the past twenty years, the natural regeneration of the wild service tree in the nature reserve has decreased considerably. At an experimental plot where a high forest was converted to a coppice with standards, regeneration occurred over 75% of the area. Root suckers were found at the beginning of the observation period. After 2–3 years, generative regeneration occurred.
    Źródło:
    Dendrobiology; 2012, 68
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Secretory structures of subterranean organs of some species of the Cardueae, and their diagnostic value
    Autorzy:
    Fritz, E.
    Saukel, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/19171.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    secretory structure
    subterranean organ
    Cardueae
    diagnostic value
    root anatomy
    microscopy
    Compositae
    secretory duct
    flowering plant
    rhizome
    epithelial cell
    species list
    statistical analysis
    Opis:
    Secretory ducts and cavities of roots and rhizomes are typical features of the Cardueae tribe in the Asteraceae family. We used light microscopy to analyze the anatomy of the subterranean organs of 21 species of 13 genera of the Cardueae, with particular attention to the secretory system, interpreted in taxonomic terms. The anatomy of secretory ducts varied greatly. A new measurement quotient, C1 [length of epithelial cells (longitudinal section)] and C2 [length of adjacent cells (longitudinal section)] was established. Different types of ducts are described based on type of development and the size ratios among epithelial cells. Detailed anatomical descriptions of the ducts are given, together with their occurrence in particular taxa. The simultaneous presence of various secretory ducts within a single species and their spatial position relative to other prominent anatomical features provide valuable characters for discriminating the studied Cardueae species. These analyses are of particular interest for identification of herbal drugs as, besides chemical analytical techniques such as chromatographic fingerprinting, light microscopy is a common method for purity controls and thus required in official pharmacopeias.
    Źródło:
    Acta Biologica Cracoviensia. Series Botanica; 2011, 53, 1
    0001-5296
    Pojawia się w:
    Acta Biologica Cracoviensia. Series Botanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmiany składu gatunkowego i struktury syntaksonomicznej zespolu Phyllitido-Aceretum Moor 1952 na Roztoczu Ukraińskim
    Changes of species composition and syntaxonomic structure of association Phyllitido-Aceretum Moor 1952 in the Ukrainian part of Roztocze
    Autorzy:
    Soroka, M.
    Wozniak, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/791608.pdf
    Data publikacji:
    2017
    Wydawca:
    Wyższa Szkoła Zarządzania Środowiskiem w Tucholi
    Tematy:
    lasy jaworowe
    zespol Phyllitido-Aceretum
    sklad gatunkowy
    struktura syntaksonomiczna
    Roztocze [geogr.]
    forest
    sycamore
    species composition
    composition change
    syntaxonomic structure
    Phyllitido-Aceretum association
    Ukraine
    Roztocze macroregion
    Źródło:
    Zarządzanie Ochroną Przyrody w Lasach; 2017, 11
    2081-1438
    2391-4106
    Pojawia się w:
    Zarządzanie Ochroną Przyrody w Lasach
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    ISSR analysis points to relict character of Aconitum bucovinense Zapal. (Ranunculaceae) at the range margin
    Autorzy:
    Boron, P.
    Zalewska-Galosz, J.
    Sutkowska, A.
    Zemanek, B.
    Mitka, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/59093.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    Carpathians Mountains
    conservation genetics
    endemic species
    marginal population
    schizo-endemism
    relict population
    Aconitum bucovinense
    Ranunculaceae
    Polish Red Data Book of Plants
    genetic diversity
    genetic structure
    ISSR technique
    Opis:
    Aconitum bucovinense, a high-mountain species endemic to the Eastern and Southern Carpathians, including the Apuseni Mountains, is legally protected and classified in the Polish Red Data Book of Plants. It attains its NW geographical range in two peripheral populations in the Western Bieszczady Mountains (Polish Eastern Carpathians), isolated by a distance of 13.1 km. PCR-ISSR analysis has been used to elucidate the within- and among-populational levels of species genetic diversity. A UPGMA and block clustering showed discreteness of the populations and subpopulations based on ISSR banding pattern. Analysis of Molecular Variance (AMOVA) revealed significant divergence (P = 0.024) of the two marginal populations and highly significant (P < 0.001) differentiation of subpopulations within populations. The theta index calculated for the two marginal populations and the core population in the Carpathians was 0.131 ±0.030 S.D. Most of the population-genetic diversity indices of the marginal populations were not different from those in the core area but the Shannon’s and rarity indices were lower in the marginal populations. It seems that founder effect and subsequent genetic bottleneck resulted in a fine-scale population genetic structure. The marginal populations under study need a relevant recovery program to maintain their genetic diversity.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2011, 80, 4
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Awifauna lęgowa dojrzałych drzewostanów Puszczy Boreckiej i jej zmiany na przełomie XX i XXI wieku
    Breeding avifauna of mature forest stands in the Borki Forest and its dynamics at the turn of the 21st century
    Autorzy:
    Rakowski, G.
    Czarnocki, K.
    Ukalska, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1294672.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    Puszcza Borecka
    lasy
    fauna
    ptaki
    gatunki legowe
    grupy ekologiczne
    zgrupowania zwierzat
    bogactwo gatunkowe
    zageszczenie zwierzat
    wykaz gatunkow
    Borki Forest
    bird assemblage structure
    species richness
    density changes
    forest habitats
    Opis:
    The composition and structure of the breeding bird community in the Borki Forest in north-eastern Poland were investigated during two separate periods: 1994–1996 and 2012–2014. Bird censuses were carried out in three plots located in mature oak-hornbeam, ash-alder and mixed coniferous forest stands. A standard combined mapping technique for estimating the number of breeding birds was applied. A total of 74 bird species bred at least once within any plot during 1994–1996 or 2012–2014. The structure of the bird assemblages on particular plots displayed a high degree of similarity, exceeding 75%, which means that they represent essentially the same bird community. However, the investigated assemblages have changed substantially over the 20 years. Both, the number of breeding bird species and the population densities on all plots, were much higher in 2012–2014 than in 1994–1996. The mean number of breeding species on all plots was over 50% higher in 2012–2014 than in 1994–1996, whereas the mean total density of breeding pairs increased by more than 60%. Total population densities on the plots increased as a result of an increase in population densities of individual bird species combined with an increase in the number of breeding species. Due to different rates of population growth for certain species, also the composition of dominating species group have changed. The observed changes in the avifauna of the Borki Forest were most probably due to an enrichment of the forest habitats structure, which was caused by natural factors, such as ageing of forest stands, forest succession and a change in water regime by beaver dams, as well as by forest management, including group felling within or in the vicinity of plots and uncovering of the forest edge.
    Źródło:
    Leśne Prace Badawcze; 2016, 77, 3
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena introdukcji Carya ovata (Mill.) K. Koch na siedlisku grądu w Nadleśnictwie Czerniejewo
    Assessment of Carya ovata (Mill.) K.Koch introduction to the potential oak-hornbeam forest habitat in the Czerniejewo Forest District
    Autorzy:
    Paź, S.
    Czapiewska, N.
    Dyderski, M.K.
    Jagodziński, A.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/985838.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    ekosystemy lesne
    rosliny
    gatunki obce
    introdukcja
    orzesznik pieciolistkowy
    Carya ovata
    zmiany struktury drzewostanu
    siedliska gradowe
    Nadlesnictwo Czerniejewo
    vegetation
    species richness
    light availability
    tree stand structure
    galio−carpinetum
    Opis:
    Alien tree species, due to their longevity, manifest their invasive potential after several decades from introduction. For the high threat to biodiversity, there is a need to analyze the risk of introduction connected with numerous alien tree species introduced in the various forest ecosystems. We aimed to assess the productivity potential and effect of alien Carya ovata on understory vegetation. Our study was conducted in the oldest (122 years old) tree stand of C. ovata in Poland, located in the Czerniejewo Forest District (western Poland). We analyzed C. ovata tree stand features and vegetation traits within the forest community and compared with natural vegetation – oak−hornbeam forest. We found that C. ovata trees had lower dimensions and standing volume than oaks (Quercus robur and Q. petraea) growing in the neighborhood. We also did not find the impact of C. ovata stands on understory vegetation species composition and light availability. Because of the low impact on forest floor vegetation and lack of spread we concluded that C. ovata cannot be classified as an invasive species. Moreover, its introduction was not successful in terms of tree stand productivity.
    Źródło:
    Sylwan; 2018, 162, 01; 41-48
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Porównanie struktury wewnętrznej oraz właściwości przemiałowych ziarna orkiszu i pszenicy zwyczajnej z uprawy ekologicznej
    Comparison of internal structure and milling properties of spelt and bread wheat from ecological farming
    Autorzy:
    Cacak-Pietrzak, G.
    Gondek, E.
    Jonczyk, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/808966.pdf
    Data publikacji:
    2013
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    pszenica orkisz
    pszenica zwyczajna
    ziarno
    gatunki roslin
    wlasciwosci przemialowe
    struktura wewnetrzna
    cechy fizykochemiczne
    uprawa ekologiczna
    spelt wheat
    common wheat
    grain
    plant species
    milling property
    internal structure
    physicochemical trait
    ecological cultivation
    Opis:
    W artykule przedstawiono badania mające na celu porównanie struktury wewnętrznej oraz właściwości przemiałowych ziarna orkiszu (odmiana Schwabenkorn) oraz pszenicy zwyczajnej (odmiany Legenda i Parabola). Ziarno pochodziło z uprawy ekologicznej z doświadczenia przeprowadzonego w sezonie 2009/2010 w Stacji Doświadczalnej Osiny, należącej do IUNG-PIB w Puławach. Struktura wewnętrzna orkiszu była podobna jak ziarna pszenicy zwyczajnej odmiany Legenda, cechowała się luźnym ułożeniem ziaren skrobi i białka. W porównaniu z ziarnem pszenicy zwyczajnej, ziarno orkiszu cechowało się istotnie mniejszą masą 1000 ziaren, gęstością w stanie usypowym, wyrównaniem oraz większą zawartością popiołu. Wydajność mąki ogółem uzyskanej z przemiału ziarna orkiszu była na podobnym poziomie jak z ziarna pszenicy zwyczajnej odmiany Legenda, istotnie więcej mąki uzyskano z przemiału ziarna odmiany Parabola. Nakłady energetyczne na przemiał ziarna orkiszu były istotnie niższe w porównaniu z ilością energii zużywanej podczas przemiału ziarna pszenicy zwyczajnej.
    Comparison of internal structure and milling properties of spelt (variety Schwabenkorn) and bread wheat (variety Legenda and Parabola) was presented in this work. The seed came from organic cultivation from the experiment conducted in 2009/2010 season at the Experimental Station Osiny, belonging to IUNG-PIB in Pulawy. The internal structure of spelt was similar to bread wheat grain (variety Legenda), it was characterized by a loose arrangement of starch grains and protein. Compared with a grain of bread wheat, spelt grain were characterized by a signifi cantly lower weight of 1000 grains, test weight, uniformity and higher ash content. Total yield of fl our obtained from the milling of spelt grain was at a similar level as the grain wheat variety Legenda, signifi cantly more fl our obtained from the milling of grain variety Parabola. The energy expenditure for milling spelt grain were signifi cantly lower compared to the amount of energy used during milling of wheat grain.
    Źródło:
    Zeszyty Problemowe Postępów Nauk Rolniczych; 2013, 574
    0084-5477
    Pojawia się w:
    Zeszyty Problemowe Postępów Nauk Rolniczych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamika i główne kierunki zmian w drzewostanach zagospodarowanej części Puszczy Białowieskiej
    Dynamics and main direction of change in forest stands constituting the managed part of Bialowieza Forest
    Autorzy:
    Bruchwald, A.
    Dmyterko, E.
    Brzeziecki, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/985942.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Puszcza Bialowieska
    drzewostany gospodarcze
    dynamika drzewostanu
    siedliska lesne
    struktura drzewostanu
    sklad gatunkowy
    struktura wiekowa
    miazszosc drzewostanow
    przyrost miazszosci
    abiotic and biotic threats
    forest age structure
    low−productivity stands
    stand productivity
    stand volume
    stand stability
    species composition
    wind risk model
    Opis:
    The paper describes current (in years 2007−2017) changes of basic parameters of forest stands that constitute the managed part of Białowieża Forest (ca. 53,000 ha), divided into three forest districts: Białowieża (12,600 ha), Hajnówka (19,700 ha) and Browsk (20,400 ha). The investigated tree stands represent different phases of ecological succession, modified by silvicultural treatments and other human activities. The course of the succession processes is varied, depending, first of all, on local site conditions, consisting mainly of fresh sites (ca. 60%) – particularly fresh broadleaved forest, and encompassing exceptionally high fraction of wet and swamp sites (40%) – especially wet broadleaved forest site type. Most stands represent the intermediate, highly productive phase of succession, with spruce and oak as the dominant tree species. In particular, such stands are common in Białowieża and Hajnówka forest districts. Recently, the share of the mentioned stands is declining, most intensely in the Browsk Forest District. In 2017 alone, 430 ha of highly productive forest stands disappeared from the Białowieża Forest. The process of decay involved mixed stands; besides of spruces which were killed by a current bark beetle infestation, also many oaks, pines, birches, alders as well as rare and valuable minor tree species (such as ashes and maples) died. Dying spruce and, more often, oak stands are often replaced by low−productive hornbeam trees, occupying earlier lower stand strata in such stands. The resulting hornbeam stands are often distinguished by low crown closure and low productivity. Tree stands occurring in the Białowieża Forest are among the most endangered by wind damage stands in Poland. It means that in case of strong winds, several trees will be broken and/or uprooted. The intensity of such phenomena will be further increased by the high tree volume of stands as well as by the presence of many gaps in forest canopy, caused by a massive mortality of spruce trees. In general, one may expect that in the nearest future many stands occurring in the Białowieża Forest, built by different tree species, will be subject to a massive decay. The list of factors contributing to this process is long and involves, among other things, recurring droughts during the growing season, unfavorable changes in ground water table and increased frequency of strong winds. All these factors negatively influence the health status of trees, which further favours the development of parasitic fungi and insects. In consequence, there is a high probability that many areas in the Białowieża Forest will, for a long time, retain a treeless character and/or will be occupied by low−productive and single species hornbeam stands.
    Źródło:
    Sylwan; 2018, 162, 11; 897-906
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmiany zachodzące w lasach Ziemi Kłodzkiej w latach 2001-2017
    Changes in the forests of the Kłodzko Region in years 2001-2017
    Autorzy:
    Dmyterko, E.
    Bruchwald, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/985721.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Ziemia Klodzka
    lasy
    sklad gatunkowy
    zmiany skladu gatunkowego
    klasy wieku
    struktura drzewostanu
    pozyskiwanie drewna
    zlomy
    wykroty
    posusz
    miazszosc surowca drzewnego
    zmiany w drzewostanach
    dynamika zmian
    zagrozenia drzewostanow
    lata 2001-2017
    species composition
    stand age structure
    timber harvest
    damage caused by wind and drought
    stand
    growth model
    Opis:
    The aim of the study was to assess the changes occurring in the forests of the Kłodzko Region in the recent period (2001−2017), with particular emphasis on the species composition of the stands, their share in age classes and the structure of harvested timber, including live trees, deadwood, wind−broken and wind−fallen trees. The Kłodzko Region located in the Sudety Mountains (SW Poland) covers the forests of four forest districts: Lądek−Zdrój, Międzylesie, Bystrzyca Kłodzka and Zdroje. The declining share of spruce stands (from 83.5% in 2001 to 75.5% in 2017) and the increasing share of beech and larch as well as sycamore stands indicate that these forests are systematically rebuilt. The average age of the stands is very high (81 years). The share of young (<20 years old ) stands is low (only 5%), while those older than 100 years constitute about 35%. The 21st century saw a serious damage to the investigated forests caused by frequent strong winds and long−lasting droughts in the growing seasons. The three hurricanes that took place in the analysed period were the cause of the removal of 1.1 million m3 of timber in the form of wind−broken and wind−fallen trees. The drought in the growing season in 2015 resulted in the salvage harvest of deadwood with a total volume of 1.6 million m3, which corresponds to the volume of four annual allowable cuts determined for the undisturbed growth conditions of trees in the area under research. Using the wind damage risk model, the threat measure Ms reaching a value of above 40 was calculated for the forests of the Kłodzko Region, which are currently among the most threatened in Poland. This threat results mainly from the high share of spruce stands in older age classes with high average height and gaps after previous hurricanes as well as from a large area of stands located at high elevations.
    Źródło:
    Sylwan; 2019, 163, 08; 675-684
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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