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    Wyświetlanie 1-11 z 11
    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:
    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:
    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:
    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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