Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Dynamika" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-6 z 6
    Tytuł:
    Rola matematycznego modelowania w prognozowaniu wplywu potencjalnych zmian klimatu na ekosystemy lesne
    Autorzy:
    Brzeziecki, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/814753.pdf
    Data publikacji:
    1994
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    zmiany klimatyczne
    dynamika ekosystemow
    modelowanie matematyczne
    ekosystemy lesne
    prognozowanie
    lesnictwo
    Źródło:
    Sylwan; 1994, 138, 10; 5-21
    0039-7660
    Pojawia się w:
    Sylwan
    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:
    Wieloletnia dynamika starodrzewów w zagospodarowanej części Puszczy Białowieskiej: gatunki ekspansywne i ustępujące
    Long-term dynamics of old-growth stands in the managed part of the Bialowieza Forest: increasing and declining tree species
    Autorzy:
    Drozdowski, S.
    Brzeziecki, B.
    Żybura, H.
    Żybura, B.
    Gawron, L.
    Buraczyk, W.
    Zajączkowski, J.
    Bolibok, L.
    Szeligowski, H.
    Bielak, K.
    Widawska, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1008501.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Puszcza Bialowieska
    starodrzew
    dynamika drzewostanu
    drzewa lesne
    swierk
    grab
    jesion
    olsza
    dab
    lipa
    brzoza
    klon
    sosna
    wiaz
    zageszczenie drzew
    piersnicowe pole przekroju
    piersnice drzew
    gatunki ekspansywne
    gatunki ustepujace
    stale powierzchnie obserwacyjne
    badania dlugoterminowe
    old−growth forest
    permanent plot
    long−term trend
    population density
    population dynamics
    tree species
    Opis:
    In the paper, an assessment of tree population dynamics in the old−growth stands of the managed part of the Białowieża Forest is presented. Data from five permanent sample plots with a total size of 9.3 ha and six inventories that cover the period 1949−2006, were used. Depending on the dynamic status, determined on the basis of changes in a number of individuals per hectare, basal area and quadratic mean diameter, three major groups of tree species were distinguished: 1) an increasing group, containing only hornbeam and lime; 2) a stable group, involving alder and spruce and 3) a declining group consisting of oak, ash, maple, pine, birch, elm and aspen.
    Źródło:
    Sylwan; 2012, 156, 09; 663-671
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Problem masowego zamierania drzewostanów świerkowych w Leśnym Kompleksie Promocyjnym "Puszcza Białowieska"
    Problem of a massive dying-off of Norway spruce stands in the 'Bialowieza Forest' Forest Promotional Complex
    Autorzy:
    Brzeziecki, B.
    Hilszczański, J.
    Kowalski, T.
    Łakomy, P.
    Małek, S.
    Miścicki, S.
    Modrzyński, J.
    Sowa, J.
    Starzyk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/985913.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lesne kompleksy promocyjne
    Lesny Kompleks Promocyjny Puszcza Bialowieska
    drzewostany swierkowe
    stan sanitarny
    zagrozenia drzewostanow
    szkodniki roslin
    kornik drukarz
    Ips typographus
    dynamika populacji
    gradacja
    drewno martwe
    grzyby patogeniczne
    zagrozenie pozarowe
    zamieranie lasow
    norway spruce bark beetle infestation
    białowieża forest
    ecosystem stability
    multifunctional forestry
    natura 2000 plc200004
    natural values
    world heritage site
    Opis:
    The Białowieża Forest (BF) is in many respects an exceptional object, of a great importance for nature protection and forest management, at the international scale. The BF plays also a key role from the point of view of regional development and welfare of local community. In the last period, a big threat for multiple values of the BF has arisen, as a result of enormous bark beetle infestation, which started in 2012 and has killed 1.4 million m3 of spruce trees. In the paper, first, a brief overview of the general history of the BF and an account of long−term human impacts on its functioning and structure is provided. Next, the history of bark beetle infestations in the BF is analysed. It is shown that, in the period 1992−2007, the average volume of spruces killed by bark beetle amounted on average to 20,000 m3 of wood annually. During that period practically all dead trees were removed from the forest by means of salvation cuttings. Starting from 2008, more and more trees infested by European spruce bark beetle were left in the forest, in a result of a pressure exerted by environmental groups. In 2012, Minister of Environment decided to reduce the allowable cut, determined in forest management plans elaborated for the managed part of the BF, from 107,000 to 48,500 m3/year. This decision, along with several other regulations and restrictions, made in practice impossible to stop the development of a current bark beetle infestation, which started in 2011 and intensified during the next 6 years (solely in 2016 bark beetles killed 480,000 m3 of spruce trees). In the paper, the most important implications and consequences of the current situation are briefly summarized and discussed. A special attention is given to the problems concerning: 1) protection of Natura 2000 species and sites (endangered by bark beetle outbreak), 2) a negative influence of large amounts of spruce deadwood on forest soils, 3) threats caused by pathogenic fungi, 4) question of public safety, 5) fire hazard, and 6) economical dimension. The legal and socio−economical foundations of the functioning of Hajnówka, Browsk and Białowieża forest districts comprising the managed part of the BF, as well as their most important environmental and social consequences are discussed too. Among others, it is indicated that, under current conditions of the BF, human intervention plays a key role in maintaining stable and compositionally diverse woodland communities. Finally, several suggestions and recommendations are provided, aimed at, in the short term, breaking off the current bark beetle outbreak, and, in the long term, at maintaining a multifunctional character of the BF and its ability to provide all important ecosystem services on a sustainable basis.
    Źródło:
    Sylwan; 2018, 162, 05; 373-386
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wieloletnia dynamika drzewostanów na dawnym zrębie kulisowym w warunkach ochrony ścisłej (Łysica, Góry Świętokrzyskie)
    Long-term dynamics of forest stands on a former narrow strip clear cut under conditions of strict protection (Lysica, the Swietokrzyskie Mountains)
    Autorzy:
    Brzeziecki, B.
    Janicki, S.
    Wiech, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1008894.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    parki narodowe
    Swietokrzyski Park Narodowy
    obszary ochrony scislej
    rezerwat Lysica
    stale powierzchnie obserwacyjne
    zrab kulisowy
    drzewostany
    dynamika drzewostanu
    zmiany skladu gatunkowego
    buk zwyczajny
    Fagus sylvatica
    jodla pospolita
    Abies alba
    swierk pospolity
    Picea abies
    klon jawor
    Acer pseudoplatanus
    zageszczenie drzew
    rozwoj drzewostanu
    stand dynamics
    long−term study
    narrow strip clear cut
    european beech
    norway spruce
    silver fir
    sycamore
    strict protection
    Opis:
    Major results of the 45−year−long study on the dynamics of strictly protected forest stands, using 3 permanent study plots, 25×100 m each, located on a former narrow strip clear cut established in the beginning of the 20th century on the northern slopes of the Mt. Łysica (the Świętokrzyskie Mountains, Central Poland) are presented. The general development of forest stands is analysed, including change of overall density, tree mortality rate (general and by species), dynamics of basal area and average tree diameter, competitive ability as well as changing role of particular species (mainly European beech, silver fir, sycamore and Norway spruce) in formation of the general stand structure. The results of the study are compared with other investigations of similar type.
    Źródło:
    Sylwan; 2011, 155, 08; 518-529
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Odnowienie naturalne drzew w Puszczy Białowieskiej
    Natural regeneration of trees in the Bialowieza Forest
    Autorzy:
    Brzeziecki, B.
    Andrzejczyk, T.
    Żybura, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/985949.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Puszcza Bialowieska
    odnowienia naturalne
    drzewa lesne
    topola osika
    Populus tremula
    brzoza brodawkowata
    Betula pendula
    brzoza omszona
    Betula pubescens
    olsza czarna
    Alnus glutinosa
    sosna zwyczajna
    Pinus sylvestris
    dab szypulkowy
    Quercus robur
    jesion wyniosly
    Fraxinus excelsior
    klon pospolity
    Acer platanoides
    wiaz gorski
    Ulmus glabra
    swierk pospolity
    Picea abies
    lipa drobnolistna
    Tilia cordata
    grab pospolity
    proces dorastania
    ekosystemy lesne
    dynamika lasu
    active approach
    deer browsing
    long−term study
    multifunctional forest management
    natural recruitment
    nature conservation
    silvicultural treatment
    strict protection
    tree competition
    tree diversity
    Opis:
    Since several years already, a massive infestation of bark beetle has taken place in the Białowieża Forest, decimating a local Norway spruce population. In consequence, many open areas appeared, practically deprived of trees and other forest vegetation. The existence of such areas has a very negative impact on multiple values of the Białowieża Forest: natural, social, economical and landscape−aesthetic values. The local forest administration prepared a strategy aimed at active restoration of diverse woodland communities typical for the Białowieża Forest in all places, where bark beetle infestation wiped up the spruce stands. Those plans were criticized by representatives of the environmental organizations who blamed the foresters for transforming the Białowieża Forest into ‘plantation’ and claiming that such measures are inconsistent with the existing forest management and protection plan. The postulate of environmentalists is that the recovery of woodland communities should proceed completely naturally. Taking into account the above mentioned controversies, in this paper we examine the issue of natural regeneration in the Białowieża Forest in detail. In particular, we try to determine to which extent this method of forest reproduction enables re−establishment of compositionally diverse woodland communities, distinguished by a high level of biological diversity and able to provide a wide range of commodities and benefits important for today’s society. Based on an extensive literature review we show that a combination of different (abiotic and biotic) factors, influencing establishment and subsequent growth of seedlings and saplings in the Białowieża Forest has long been strongly unfavorable for many tree species. In this regard, one should particularly emphasize the negative role of large herbivores, especially red deer, which is present in the Białowieża Forest since the end of 19th century, when it became a private hunting ground for Russian tzars. The devastating effect of deer browsing on natural regeneration is a well−documented phenomenon and widely recognized problem in the forestry practice. The fencing of young forest generation against game pressure is an indispensable measure, needed to secure the continuous existence of several tree species (first of all those palatable and vulnerable to browsing). Very strong arguments for an active approach to the described problem delivers also a long−term study on natural forest dynamics conducted since 1936. It shows that under conditions of strict protection the regeneration capacity of the Białowieża tree species is very variable. These differences lead to the compositional simplification and impoverishment of many tree stands, with numerous negative consequences for local biodiversity. We underline that an active management strategy is a basic prerequisite for maintaining a diverse character of the Białowieża stands and their ability to provide all important ecosystem services on a sustainable basis. Such a strategy should include, beside of the phase of establishment, also the subsequent developmental stages of new forest generations. The general goal of such a strategy should be to secure a possibly high diversity of tree composition and to enable the development of tree species representing a full range of life−history strategies and playing different successional roles: from typical pioneer species, through intermediate, to climax species.
    Źródło:
    Sylwan; 2018, 162, 11; 883-896
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies