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    Wyświetlanie 1-6 z 6
    Tytuł:
    Dynamika zmian struktury piersnic w stadiach rozwojowych roznowiekowego lasu jodlowego
    Autorzy:
    Banas, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/824363.pdf
    Data publikacji:
    2002
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    dynamika zmian
    drzewostany roznowiekowe
    struktura piersnic
    lesnictwo
    stadia rozwojowe
    drzewostany jodlowe
    Źródło:
    Sylwan; 2002, 146, 09; 81-91
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamika zmian lasu o zroznicowanej strukturze w ciagu 26-letniego okresu kontrolnego
    Autorzy:
    Poznanski, R
    Banas, J.
    Zieba, S.
    Zygmunt, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/823891.pdf
    Data publikacji:
    2001
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    dynamika zmian
    drzewostany
    rozklad piersnic
    faza przedplonowa
    faza terminalna
    lesnictwo
    inwentaryzacja lasu
    zasobnosc drzewostanu
    Źródło:
    Sylwan; 2001, 145, 01; 73-84
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmiany roślinności w rezerwacie "Cisy Staropolskie im. Leona Wyczółkowskiego" koło Wierzchlesu w Borach Tucholskich
    Changes in vegetation of the 'Cisy Staropolskie im. Leona Wyczolkowskiego' reserve near Wierzchlas in the Tuchola Forest
    Autorzy:
    Iszkuło, G.
    Golimowski, R.
    Lewandowska, A.
    Wachowiak, E.
    Boratyński, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/994670.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    rezerwaty przyrody
    rezerwat Cisy Staropolskie
    cis pospolity
    Taxus baccata
    dynamika roslinnosci
    dynamika zmian
    taxus baccata
    association dynamics
    seedling die−off
    sex structure
    Opis:
    Basing on repeated analyses of vegetation of the ‘Cisy Staropolskie im. Leona Wyczółkowskiego’ reserve near Wierzchlas (N Poland) it was found that frequency of species characteristic for Querco−Fagetea association increased at the expense of species typical for acidophilous and wet sites (Vaccinio−Piceetea, Quercetea robori−petraeae and Alnetea glutinosae, Phragmitetea classes respectively). Yew population decreased in number by almost 30%, while in case of other species this rate amounted from 18 to 80%. This points to natural process of decrease in number of trees related with their growth and ageing. Sex structure of Taxus baccata population (only 29% of females) turned to be very unfavourable. Although yew seedlings occur in great number, they die in vast majority during the wintertime. Low temperature connected with over−shadowing are probably the main reason of such small survival rate.
    Źródło:
    Sylwan; 2012, 156, 03; 163-169
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza wybranych czynników w procesach globalizacyjnych i ich wpływ na kierunki zmian w światowym leśnictwie. II. Zasoby leśne oraz funkcje pełnione przez lasy w skali globalnej
    Analysis of selected factors in the globalisation processes and their impact on trends in global forestry. II. Forest resources and functions performed by forests on a global scale
    Autorzy:
    Paschalis-Jakubowicz, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1009239.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    globalizacja
    lasy
    funkcje lasu
    zasoby lesne
    roznorodnosc biologiczna
    naturalnosc
    dynamika zmian
    global forestry
    dynamics of changes in forest resources
    Opis:
    The paper presents results of studies relating to the changes in the global forestry under the influence of various global factors. The results of the analysis include the current status and dynamics of changes in forest resources, the intensity of the functions performed by forests of the world, the extent of use and market of wood resources and non−wood products.
    Źródło:
    Sylwan; 2010, 154, 02; 75-87
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wczesna reakcja epigeicznych kusakowatych (Coloeoptera, Staphylinidae) na wycięcie i zaoranie zrębu w borze sosnowym
    Early effect of clear-cuts and their tilling on assemblages of epigeic rove beetles (Coloeoptera, Staphylinidae) in Pinus sylvetris stands
    Autorzy:
    Tamutis, V.
    Skłodowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/989084.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    bor sosnowy
    zrab zupelny
    orka
    zmiany srodowiska
    bioindykatory
    kusakowate
    Staphylinidae
    zgrupowania zwierzat
    dynamika zmian
    ecological traits
    lirter samples
    indval analysis
    prc analysis
    Opis:
    The studies were conducted on three plots, established in 100−130 year old Scots pine (Pinus sylvestris L.) stands (type: Pinetum vaccinio−mirtyllosum) situated in the southern and central parts of Lithuania (Kaunas and Vare˙na districts). Their canopy closure was from 0.6 to 0.8. The study areas comprised of a mature stand (control) and clear−cut felled in spring 2016 and tilled after 5 months. Altogether 30 litter samples (five per stand) were taken from randomly chosen locations twice: the first sampling took place one month after cutting (in May) and the other after five months (in October). In total, 921 adults and larvae representing 49 species of rove beetles (Coleoptera: Staphylinidae) were collected. The higher number of individuals was harvested in control stands (fig. 1a, tab. 1). The collected individuals were significantly more abundant during the second sampling in all studied stands (fig. 1b, tab. 1). In the same way the higher number of species was detected in control stands, but significant differences were observed only during the first sampling. Amount of forest species differed insignificantly between control stands and clear−cuts, while the rate of zoophagous species was significantly higher in control stands (fig. 2a, tab. 1). The number of mixophagous species was significantly higher in clear−cuts during the second sampling (fig. 2b−c, tab. 1). Both the felling and the tilling had a distinct impact on transformation of rove beetles assemblages in clear−cuts comparing to the mature stands (fig. 3). Ischnosoma splendidum, Othius subuliformis, Stenichnus scutellaris, Trimium brevicorne, Xantholinus tricolor, Philonthus cignatus and Sepedophilus sp. were revealed as associated with mature pine stands sites, while only Acrotona parens and Amischa analis were connected with clear−cuts (tab. 2). We propose to use these two species as indicators of strong transformation of rove beetles assemblages due to clearcutting and management. The results of the study proved that negative impact of clearcutting on number of individuals and number of forest species in rove beetles assemblages is distinct even in short period after cutting as well as that transformation of rove beetles assemblages increase after cutting of stand, especially after tilling.
    Źródło:
    Sylwan; 2017, 161, 06; 504-511
    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
      Wyświetlanie 1-6 z 6

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