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    Tytuł:
    A proposed quantitative method for assessing the impact of river regulation on its hydromorphological status
    Autorzy:
    Kiraga, Marta J.
    Markiewicz, Anna
    Powiązania:
    https://bibliotekanauki.pl/articles/27312651.pdf
    Data publikacji:
    2023
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    habitat modification score
    habitat quality assessment
    hydraulic structures
    river regulation
    water management
    Opis:
    Changes in river channel morphological parameters are influenced by anthropogenic factors, such as climatic changes, river catchment management changes, and hydrotechnical development of rivers. To assess the intensity of individual pressures and the resulting changes in abiotic and biotic factors in the riverbed, water quality monitoring is conducted, including the assessment of the hydromorphological status. The assessment can be based on the River Habitat Survey (RHS) which is a synthetic method that includes the evaluation of habitat character and river quality based on their morphological structure. The input data, which characterise any river include physical features of hydrotechnical structures, bed granulation, occurrence of bedforms, visible morphodynamic phenomena, and a sediment transport pattern. The RHS method allows to determine two quantitative indices used to evaluate the hydromorphological status: Habitat Modification Score (HMS), which determines the extent of transformation in the morphology of a watercourse, and Habitat Quality Assessment (HQA), which is based on the presence and diversity of natural elements in a watercourse and river valley. The proposed method can be divided into three stages. The first assesses the river section hydromorphological indices, describing the degree of technical modification (HMS) and the ecological quality of the reach (HQA), using the RHS method. The second stage describes morphological changes resulting from the technical regulation and estimates indices for the regulated reach. Finally, we compare HQA and HMS indices before and after the regulation. This comparison is described by numerical indicators and related to reference values.
    Źródło:
    Journal of Water and Land Development; 2023, 57; 98--106
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Variation in stage structure and fitness traits between road verge and meadow populations of Colchicum autumnale [Liliaceae]: effects of habitat quality
    Autorzy:
    Mroz, L
    Powiązania:
    https://bibliotekanauki.pl/articles/57339.pdf
    Data publikacji:
    2006
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    perennial plant
    variation
    stage structure
    fitness trait
    road verge
    meadow
    plant population
    Colchicum autumnale
    Liliaceae
    habitat quality
    Opis:
    The frequency distribution and density of three life stages as well as fitness components of the perennial plant Colchicum autumnale growing in the unmanaged road verges and in the extensive mown and grazed meadows in the Sudeten Mts. were studied. Furthermore, investigated were the effects of population size and plant size (measured as number of flowers) on reproductive success and explored if variation in reproductive and vegetative traits of adults could be associated with soil characteristics. The t-test indicated that proportions of subadults and reproductive adults were significantly lower in verge than in meadow populations, and of vegetative adults significantly higher. The plant density of reproductive adults and the reproductive adults to all adults ratio were significantly lower in verge populations compared to meadow populations. Although habitat type accounted for significant variation in stage structure, no significant difference was found between vegetative and reproductive traits in adult plants, except for the number of flowers. In verge populations the number of flowers was significantly lower as compared to meadow populations. The traits related to reproduction were not significantly influenced by population size. However, the proportion of flowers setting fruit decreased significantly with increasing number of flowers. The stepwise multiple regression revealed significant relationships between soil characteristics and number of fruits per plant, fruit set, number seeds per plant and number of leaves in vegetative adults. The results suggest that the creation of the low and relatively open vegetation cover could increase the chance of persistence of C. autumnale living in verge habitats by promoting of seed germination, seedling establishment and flowering, and they also show that the reproductive success and vegetative components of fitness are most likely influenced by habitat quality.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2006, 75, 1; 69-78
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Veronico beccabungae-Callitrichetum stagnalis [Oberd. 1957] Muller 1962, a plant association new to Poland - quality of habitat
    Autorzy:
    Spalek, K
    Horska-Schwarz, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/58347.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    Polska
    plant association
    Potametea class
    plant community
    endangered association
    aquatic plant
    phytosociology
    Veronico beccabungae-Callitrichetum stagnalis community
    habitat quality
    distribution
    new plant association
    Opis:
    The paper presents a community of water plants that is new to Poland, Veronico beccabungae-Callitrichetum stagnalis (Oberd. 1957) Müller 1962. This community belongs to the class Potametea. It was discovered in the village of Odrowąż near the town of Krapkowice in Silesia (SW Poland). Veronico beccabungae-Callitrichetum stagnalis in Poland occurs within an irregularly shaped shallow underwater spring, located in the distal part of the Oder River’s flood terrace. This plant community covered 0.2 ha in 2008. Callitriche stagnalis predominated in this community. Species such as Callitriche hamulata and Callitriche verna occurred less frequently. An average of five species were counted in a relevé. Alkaline sediments (pH 8.03) occur in the substratum, but sediments with a lower pH value (7.73) occur in the spring’s outflow zone towards the Odra River. Water in the spring, where Veronico beccabungae-Callitrichetum stagnalis occurred, has a medium mineralisation but is rich in dissolved compounds. The condition of this community within the studied habitat could be evidence for highly adaptive abilities and this community's good adjustment to the natural conditions. Veronico beccabungae-Callitrichetum stagnalis is a rare and endangered plant community in Central Europe. The locality of this plant community in Poland should be given species protection.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2009, 78, 4; 345-349
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stan zdrowotny drzew i jakość siedliska na terenie miasta Oświęcim
    The state of health of the trees and the quality of habitat in the city of Oświęcim
    Autorzy:
    Gołąbek, E.
    Sławiński, J
    Jasińska, O
    Powiązania:
    https://bibliotekanauki.pl/articles/401920.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    zdrowotność drzew
    jakość siedliska
    skala zdrowotności
    ocena jakości siedliska
    miasto
    health of the trees
    quality of habitat
    health scale
    assess the quality of habitat
    city
    Opis:
    Celem przeprowadzonych w 2011 r. badań było określenie zdrowotności wybranych drzew miejskich oraz jakości ich siedliska (za pomocą dwóch prostych metod), a następnie scharakteryzowanie występujących między nimi zależności. Analizą objęto 5 obszarów miasta Oświęcim różniących się między sobą warunkami siedliskowymi. Kondycję zdrowotną drzew wyznaczono na podstawie skali zdrowotności opracowanej przez J. Dudę, natomiast jakość siedliska określana była w oparciu o zmodyfikowaną przez Mazuruk oraz autorów artykułu skalę, zaproponowaną przez Jendrzejczak, Buczkowską, Chojnacką. Badaniami objęto 424 drzewa (22 gatunki). Najliczniejszymi były: lipa drobnolistna Tilia cordata – 16,7% i lipa szerokolistna Tilia platyphyllos (15,8%). Najwięcej (aż 76,2%) stanowiły drzewa w dobrym stanie zdrowotnym i najliczniejszą grupę (38%) okazy na siedlisku o średniej jakości. Najlepszym stanem zdrowotnym charakteryzowały się drzewa na siedlisku o bardzo wysokiej i średniej jakości, a najgorszym na siedlisku o jakości niskiej. Badania wykazały, że nie zawsze jakość siedliska znajduje swoje bezpośrednie odzwierciedlenie w stanie zdrowotnym drzew. Może to wynikać między innymi z faktu, iż drzewa rosnące w miejscach eksponowanych oraz stanowiące realne zagrożenie dla ruchu pieszego i ulicznego są częściej poddawane zabiegom pielęgnacyjnym mającym bezpośredni wpływ na ocenę zdrowotności.
    he study conducted in the year 2011 aimed at the determination of the health state of selected urban trees and the quality of their habitat (using two simple methods), and then the characterization of the correlations between them. The analysis included five areas of the town of Oświęcim (Silesian Voivodeship, Southern Poland), differing in tree habitat conditions. The health state of the trees was evaluated based on the health scale developed by J. Duda, and the habitat quality was determined on the basis of the scale proposed by Jendrzejczak, Buczkowska and Chojnacka, modified by Mazuruk and the authors of the article. The study included 424 trees of 22 species. The most numerous were: the small-leaved lime Tilia cordata – 16,7% and broad-leaved lime Tilia platyphyllos (15,8%). The majority of the trees (as many as 76,2%) were in good health condition, and the largest group (38%) consisted of the specimens on the habitat of average quality. The trees on the habitats of very high and average quality were characterized by the best health state, and the trees on low quality habitats were in the worst state of health. The research has shown, that the quality of tree habitat is not always directly responsible for its health state. This may result, inter alia, from the fact, that the trees growing in the exposed stands and posing a real threat to pedestrians and traffic, are more often subjected to care treatments directly influence the result of health state assessment.
    Źródło:
    Inżynieria Ekologiczna; 2014, 38; 181-190
    2081-139X
    2392-0629
    Pojawia się w:
    Inżynieria Ekologiczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ zanieczyszczeń komunikacyjnych na glebę i uprawną roślinność przydrożną
    Influence of transport pollution on soil and cultivated vegetation of the wayside
    Autorzy:
    Sławiński, J.
    Gołąbek, E.
    Senderak, G
    Powiązania:
    https://bibliotekanauki.pl/articles/949984.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    zanieczyszczenia komunikacyjne
    zanieczyszczenia glebowe
    zdrowotność roślin uprawnych
    ocena jakości siedliska
    transport drogowy
    transport pollution
    contamination of soil
    health of cultivated plants
    assessment of habitat quality
    road transport
    Opis:
    Celem pracy było rozpoznanie wpływu zanieczyszczeń komunikacyjnych na glebę i roślinność uprawnianą przy pasie drogowym. Zanieczyszczenia te, to nie tylko spaliny, ale również pyły powstające w wyniku tarcia opon o nawierzchnie drogi, płyny wyciekające z nieszczelnych instalacji oraz śmieci wyrzucane przez kierowców w trakcie jazdy. Roślina bytująca w takim środowisku, jest narażona na liczne stresy i uszkodzenia. Główną przyczyną wpływającą niekorzystnie na rozwój roślin, a nawet powodującą ich śmierć, jest potęgujące się stale zanieczyszczenie powietrza, zwłaszcza w rejonach śródmiejskich jak i wzdłuż obciążonych tras komunikacyjnych. Na skutek używania soli do zwalczania gołoledzi, narażamy glebę na skażenie, co wpływa na rozwój roślin a także zmniejsza kwasowość gleby. Na wielu takich terenach zatrucie przekracza normy wytrzymałości roślin, będąc podstawową przyczyną chorób a także masowego zamierania. Obiektem badań była kukurydza oraz jej siedlisko uprawy. Do celów analiz z pola zlokalizowanego w miejscowości Kośmidry pobrano próby glebowe, w których oznaczono: pH, zasolenie, zawartość węgla organicznego i poziomy metali ciężkich. W łanie kukurydzy obserwowano obecność czynników bio- i abiotycznych, wpływających na stan zdrowotny roślin oraz poziom zachwaszczenia.
    The aim of the paper was identification of the impact of transport pollution on soil and vegetation grown in roadside soil. These pollutants are not only exhaust fumes but also dust generated by the friction of tires on road surface, fluids leaking from leaky installations and trash thrown by drivers while driving. The plant living in this environment is exposed to various stresses and damage. The main reason negatively affecting plant growth and even causing their death, is constantly increasing air pollution, especially in downtown areas and along busy roads. As a result of the use of salt for deicing, we risk contamination of the soil, resulting in poor plant growth and reduction in soil acidity. In many of these areas contamination exceeds the standards of plant resistance, being the basic cause of diseases and mass dying. The object of the study was corn and its habitat of cultivation. For the purposes of analyses soil samples were collected in the field located in the village of Kośmidry, and the following determination were carried out: pH, salinity, organic carbon content and levels of heavy metals. In the cornfield of the maize the presence of bio-and abiotic factors was noted affecting the health status of plants and the level of weed growth.
    Źródło:
    Inżynieria Ekologiczna; 2014, 40; 137-144
    2081-139X
    2392-0629
    Pojawia się w:
    Inżynieria Ekologiczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Efektywność projektów reintrodukcji głuszca (Tetrao urogallus) w Europie
    Effectiveness of capercaillie (Tetrao urogallus) reintroduction projects in Europe
    Autorzy:
    Merta, D.
    Zawadzka, D.
    Krzywiński, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/989738.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lowiectwo
    ptaki lowne
    gluszec
    Tetrao urogallus
    hodowla zwierzat
    metoda born to be free
    zagrozenia zwierzat
    drapiezniki
    warunki siedliskowe
    reintrodukcja
    Europa
    ‘born to be free'
    captive rearing
    forest grouse
    habitat quality
    survival
    predation
    translocation
    Opis:
    The study focuses on capercaillie (Tetrao urogallus) and other Galliformes birds reintroduction projects carried out in Europe since the 1950s. In Germany alone, there have been eleven projects involving the release of a total of ca. 5,000 caprcaillies, mainly obtained from the closed breeding centres. The majority of birds died shortly after release. The high mortality was caused by great pressure from predators and the poor adaptation of the birds bred in captivity to the wild−life conditions. The high mortality among the birds from artificial breeding is associated with changed morphology (e.g. shorter digestive tract, less−developed pectoral muscles), physiology, and behaviour (insufficiently developed social and anti−predatory behavioural mechanisms). Survival rates among the birds released into the wild were primarily affected by the method of breeding and release, quality of habitat, and pressure from predators. The survival rates of translocated birds were higher than those obtained from traditional breeding in aviaries. Better results were also obtained with the 'born to be free' method of breeding and release based on social contact between the mother and chicks. The following actions are obligatory in reintroduction projects: predators reduction, evaluation and improvement in the quality of environment, as well as long−term monitoring of birds. The factors crucial for the effectiveness are: the total number of birds released, the number of released birds in subsequent years, and the overall duration of the project.
    Źródło:
    Sylwan; 2015, 159, 10; 863-871
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ hałasu drogowego na ptaki leśne - eksperyment z wykorzystaniem budek lęgowych
    Influence of road traffic on woodland birds - an experiment with using of nestboxes
    Autorzy:
    Wiącek, J.
    Kucharczyk, M.
    Polak, M.
    Kucharczyk, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/991152.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    infrastruktura drogowa
    ruch drogowy
    halas komunikacyjny
    oddzialywanie na srodowisko
    oddzialywanie na zwierzeta
    ptaki lesne
    budki legowe
    zasiedlenie
    bogatka
    Parus major
    mucholowka zalobna
    Ficedula hypoleuca
    sosnowka
    Parus ater
    sikora modra
    Parus caeruleus
    kowalik
    Sitta europaea
    gniazdowanie
    legi ptakow
    presja drapieznika
    road traffic noise
    hole−nesting birds
    habitat quality
    predator pressure
    Opis:
    We investigated whether high−intensity road traffic affects the nestbox occupancy pattern of secondary hole−nesting birds. Field studies were carried out in two forests in south−eastern Poland (Lasy Janowskie forest and Polichna forest). Both complexes were included in NATURA 2000 network. In our knowledge it was first field experiment on road−traffic noise influence on forest birds, conducted in the Polish environmental conditions. The results of this experiment can be used in work on the impact of road projects on forest birds. Nestboxes were hung at twelve linear transects located perpendicularly to the busy road and they were regularly inspected in 2011−2012. Road noise was measured by use of a digital measurer of sound level at each nestbox. Monitoring the activity of predators on the study area was done with the help of digital trail cameras and experiment with use of artificial nest with eggs. Noise level decreased with distance from the road. In the first year of experiment we observed that the birds settled preferentially habitats in the vicinity of road. However in next season the number of occupied nestboxes was independent from the distance from road. We found that the pressure caused by predators on the study area was very low, creating safer nesting places for birds. Our results provide evidence that these birds are well adapted to cope with anthropogenic noise. Some species of birds preferred nesting in neighbourhood of road.
    Źródło:
    Sylwan; 2014, 158, 08; 630-64
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stan ekologiczny rzeki Stepnicy (Pomorze Zachodnie)
    Ecological state of the Stepnica river (Western Pomerania)
    Autorzy:
    Raczyńska, M
    Machula, S
    Grzeszczyk-Kowalska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/949862.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    River Habitat Survey
    jakość wód
    rzeka Stepnica
    antropopresja
    Stepnica river
    water quality
    Opis:
    W artykule opisano wyniki badań elementów hydromorfologiczny i hydrochemicznych rzeki Stepnicy (Pomorze Zachodnie). Badania prowadzono na czterech stanowiskach usytuowanych w górnym jej biegu, gdzie rzeka jest silnie przekształcona i narażona na wpływ czynników antropogenicznych. Wykazano, że na większości stanowisk rzeka Stepnica ma niską jakość wód zarówno pod względem hydromorfologicznym jak i hydrochemicznym.
    The article describes the research results of the hydro-morphological and hydro-chemical elements of the Stepnica river (Western Pomerania). The research has been carried out on four positions situated in its upper course, where the river is highly transformed and susceptible to anthropogenic factors. It has been indicated that in most places the Stepnica river has got low quality of waters in terms of hydromorphology as well as hydrochemistry.
    Źródło:
    Inżynieria Ekologiczna; 2013, 35; 46-59
    2081-139X
    2392-0629
    Pojawia się w:
    Inżynieria Ekologiczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Changes in the biotope quality unfavourable to ichthyofauna of the Szczecin Lagoon during the flood crest outflow in summer 1997
    Niekorzystne dla ichtiofauny zmiany jakości biotopu toni wodnej Zalewu Szczecińskiego podczas spływu wód powodziowych latem 1997 roku
    Autorzy:
    Poleszczuk, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/85133.pdf
    Data publikacji:
    2003
    Wydawca:
    Akademia Pomorska w Słupsku
    Tematy:
    biotope change
    biotope quality
    water quality
    Odra estuary
    fish
    ichthyofauna
    Szczecin Lagoon
    flood crest outflow
    summer
    fish habitat
    Źródło:
    Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline; 2003, 06
    1643-0115
    Pojawia się w:
    Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Macroalgae fouling community as quality element for the evaluation of the ecological status in Vela Luka Bay, Croatia
    Autorzy:
    Mrcelic, G.J.
    Sliskovic, M.
    Antolic, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/57567.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    macroalga
    fouling community
    quality element
    ecological status
    coastal water
    bioindicator
    fouling organism
    artificial habitat
    Vela Luka Bay
    Croatia
    Opis:
    One year qualitative and quantitative study of communities of three major taxonomic groups has been carried out at test panles placed in the upper infarlittoral zone of coastal area of Vela Luka Bay, Croatia. A list of 44 taxa was recorded. Chaetomorpha sp., Ulva sp., Fosliella farinosa, Sphacelaria cirrosa, Polysiphonia scopulorum were the most frequent dominant taxa. Among 27 algal taxa with noticeable presence only three were classified as ESG (Ecological State Groups) I. Low diversity and species richness together with massive presence of the green algae (as Ulva sp.) and negligible presence of ESG I taxa, may lead to erroneous conclusion that Vela Luka Bay is eutrophicated area. Low values of biomass and R/P (Rhodophyceae by Phaeophyceae ratio) Index together with dominance of Phaeophyta also support conclusion that there is no negative impact of nutrient enrichment on macrophyta fouling community in Vela Luka Bay.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2012, 81, 3
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Role of soil in the functioning of the Mazurian Lake District ecosystem
    Autorzy:
    Gotkiewicz, J
    Piascik, H.
    Smolucha, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1450768.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    hydrogenic soil
    brown soil
    soil protection
    Mazurian Lakeland
    Baltic glaciation
    soil cover
    mineral soil
    soil quality
    postglacial period
    soil
    glacial area
    agricultural production
    ecosystem functioning
    terrestrial ecosystem
    black earth
    habitat condition
    Opis:
    The Macroregion of the Mazurian Lake District and the adjoining mesoregion of the Sępopol Plain were formed during Baltic glaciation and in the post-glacial period. The existing habitat differentiation, especially large variations in the soil cover, is divided into three distinct landscape zones. The northern areas of the district are typical heavy and very heavy soils, composed of tight clays and loams, represented by brown soils and black earths. They contribute to the ecosystem stability. Hydrogenic soils occupy only a small area. Agricultural production, when carried out correctly, should not threaten the habitat and should be in harmony with the area in question. The central, moraine area of the Mazurian Lake District, with unique natural qualities, is comprised of different soil forms and various soil covers. Brown and lessive soils are dominant among mineral soils. Deluvial soils are common, which is a warning sign on the danger of erosion. Contribution of hydrogenic soils is clearly seen. Protection of these soils, as well as re-naturalisation of the selected areas, is becoming vital. This area badly requires ecological farming. Light and very light soils, mainly rusty and podzo! soils, accompanied by large areas of sensitive for transformation hydrogenic, muck, and mucky soils occur in the southern part of the district, in the area of outwash plains. Outwash plains call for complex solutions to improve the quality of their mineral soils, as well as utilisation and protection of hydrogenic soils.
    Źródło:
    Acta Agrophysica; 2001, 50; 129-137
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ siedliska na wybrane właściwości strukturalne i fizyko-mechaniczne drewna brzozy brodawkowatej (Betula pendula Roth.)
    Effect of habitat on the selected structural and physico-mechanical properties of silver birch (Betula pendula Roth.) wood
    Autorzy:
    Lachowicz, H.
    Jednoralski, G.
    Paschalis-Jakubowicz, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/990000.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewa lesne
    brzoza brodawkowata
    Betula pendula
    siedliska lesne
    las swiezy
    las mieszany swiezy
    drewno brzozowe
    wlasciwosci strukturalne
    wlasciwosci fizykomechaniczne
    czynniki siedliska
    silver birch
    structural and physical−mechanical properties
    commercial quality
    habitat type
    Opis:
    The aim of the research was to determine the habitat−related variation in the selected structural and physical−mechanical properties of silver birch. Two sample plots were established in the territory of the Biała Podlaska Forest District in eastern Poland. Samples for measurement were taken from the plots with trees aged 45−50 years growing in the fresh deciduous (Lśw) and fresh mixed deciduous (LMśw) forest habitats. The following properties were subjected to statistical analysis: the average width of annual rings, wood density determined for the samples of 20×20×300 mm, 20×20×30 mm, and 30×2.66×0.1 mm in size (the last dimension parallel to grain), tensile strength parallel to grain, compression strength parallel to grain, static bending, modulus of elasticity in static bending and the coefficients of tensile strength parallel to grain, compression parallel to grain, static bending, and modulus of elasticity in static bending. The research confirmed a significant effect of the habitat on the mean values of birch wood density for all examined sample sizes, tensile strength parallel to grain, static bending and modulus of elasticity in static bending. No significant effect of the habitat on the mean values of annual ring width, tensile strength parallel to grain and the coefficients of tensile strength parallel to grain, compression strength parallel to grain, static bending and modulus of elasticity in static bending for birch wood samples was found.
    Źródło:
    Sylwan; 2014, 158, 04; 285-291
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

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