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Wyszukujesz frazę "old pine forest" wg kryterium: Temat


Wyświetlanie 1-4 z 4
Tytuł:
Zmiany bogactwa gatunkowego runa borów sosnowych na pasach wydmowych Kampinoskiego Parku Narodowego na początku XXI wieku
Changes of the herb layer species richness within Scots pine forest of the dune belts in the Kampinos National Park (central Poland) at the beginning of XXI century
Autorzy:
Zaniewski, P.T.
Solon, J.
Ferchmin, M.
Siedlecki, L.
Powiązania:
https://bibliotekanauki.pl/articles/979033.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
peucedano−pinetum
querco−pinetum
permanent plots
semi−permanent plots
old−growth pine forest
fluctuation
species richness decrease
Opis:
Scots pine forest are of the main economic importance to the forest management in lowland Europe. Large areas of spontaneous pine forest, including old−growths, are located on two vast dune belts of the Kampinos National Park (central Poland). These forests grow on oligotrophic sandy soils with deep groundwater level. This makes the area unique to study long−term changes in this type of pine forest communities. The aim of the work was to assess the changes in the species composition and richness of undergrowth of Scots pine forests at the beginning of the XXI century. The study was conducted on 10 permanent and 53 semi−permanent plots located within stands of Peucedano−Pinetum and Querco−Pinetum associations on both dune belts of Kampinos National Park. The fieldworks were performed in 2001 and 2002, and repeated in 2015 and 2018. Based on Ward’s cluster analysis we described five local forms of plant communities. Seven species groups were distinguished and changes in their richness assessed using one sample Wilcoxon test. Each species group included species characteristic and/or differentiating for a given set of syntaxonomical units. The results confirmed the hypothesis of gradual decrease of the total species richness. The median of species richness change was –0.308 species per year and was statistically significant. The changes were bigger within the local forms of the Querco−Pinetum association in comparison to Peucedano−Pinetum. The decrease was connected especially with dry grassland and heathland species (characteristic for syntaxons of Koelerio−Corynephoretea and Nardo−Callunetea classes) as well as with coniferous forest generalist species (characteristic for syntaxons of Vaccinio−Piceetea and Cladonio−Vaccinietalia). The results suggest that the two main processes shaping the species composition at the beginning of XXI century within pine forest located on the dune belts of Kampinos National Park may be identified as (i) fluctuation, and (ii) simplification, manifested by species richness decrease. This is probably connected with forest regeneration after past human use and disturbance.
Źródło:
Sylwan; 2020, 164, 04; 331-342
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Struktura drzewostanów lipowo-sosnowych powstałych w wyniku półnaturalnej przebudowy starodrzewów sosnowych
Structure of lime-pine stands established as a result of seminatural reconstruction of old pine forests
Autorzy:
Jaszczak, R.
Małys, L.
Turski, M.
Hnat, M.
Majowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/1008329.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewostany sosnowe
starodrzew
przebudowa drzewostanow
przebudowa polnaturalna
drzewostany lipowo-sosnowe
struktura drzewostanu
drzewa lesne
sosna zwyczajna
Pinus sylvestris
lipa drobnolistna
Tilia cordata
wzrost roslin
pozycja biosocjalna drzew
struktura piersnic
struktura wysokosci
old pine forest
seminatural reconstruction
pine
lime
structure of breast height diameter
height structure
biosocial structure
Opis:
The paper presents results of the inventory carried out in 2008 in two−storeyed stands in which the upper storey consisted of pine trees and the lower one of lime trees. The structure of breast height diameter, height and the biosocial structure of the two species was discussed.
Źródło:
Sylwan; 2012, 156, 05; 360-368
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza zależności struktury lasu od wieku na przykładzie drzewostanów sosnowych
Analysis of forest structure in relation to age – Scots pine case study
Autorzy:
Sławski, M.
Powiązania:
https://bibliotekanauki.pl/articles/973837.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
drzewostany sosnowe
starodrzew
struktura drzewostanu
wiek drzewostanu
zmiany struktury drzewostanu
leśnictwo
forest structure
old−growth
pine forest
Opis:
Structure of pine forests develops with age and becomes more complex in older stands. Key attributes of old−growth forest structure include presence of huge trees, coarse woody debris, hollow trees, trees with fungi, clearings, two or more layered structure. In total, 26 attributes show positive correlation with age. This set can be used as base for old−growthness index. Cluster analysis divided forest stands into four groups with different level of maturity. Stands older than 160 years occurred fully developed. It seams that in sustainable forestry attributes of old−growth forests can be maintained as key elements for biodiversity.
Źródło:
Sylwan; 2011, 155, 01; 10-20
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Struktura i dynamika wielogeneracyjnych starodrzewów sosnowych występujących w obszarach ochrony ścisłej Kaliszki i Sieraków w Kampinoskim Parku Narodowym. Część 2. Procesy zamierania i dorastania oraz ich wpływ na rozkład grubości drzew
Structure and dynamics of uneven−aged, Scots pine−dominated, old−growth stands in Kaliszki and Sieraków strict reserves in Kampinos National Park. Part 2. Tree mortality and recruitment processes and their effects on tree diameter distributions
Autorzy:
Brzeziecki, B.
Zajączkowski, J.
Olszewski, A.
Bolibok, L.
Andrzejczyk, T.
Bielak, K.
Buraczyk, W.
Drozdowski, S.
Gawron, L.
Jastrzębowski, S.
Szeligowski, H.
Żybura, H.
Powiązania:
https://bibliotekanauki.pl/articles/979128.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
demographic non−equilibrium
diameter structure
long−term study
old−growth forest
permanent study
plot
scots pine
strict protection
Opis:
Two fundamental demographic processes (tree recruitment and mortality) are analyzed for forest stands growing on permanent study plots located in strictly protected Scots pine−dominated, old−growth stands of Kampinos National Park (central Poland). The major implications of the observed demographic trends for the general shape of tree size distributions are determined, as well. During the past ca 30 years, in the stands sampled, there was a pronounced lack of balance between mortality and recruitment processes. Mortality rate was eight times higher than recruitment rate. Eventually, there was a net significant decline in population density, observed for all major tree species, including Scots pine, pedunculate oak, silver and downy birch, and black alder. As mortality processes affected mainly smaller trees, there was also a significant deterioration of the general demographic status of most important tree species. This effect was shown by the change of the overall shape of diameter distributions over the study period: from reverse J−shaped to flat curves running nearly parallel to X−axis. The values of recruitment rates were markedly lower, and the values of mortality rates – significantly higher, than analogous values characterizing comparable forests (e.g., those obtained for the natural stands of Białowieża National Park). Low recruitment rates, as obtained for Kampinos stands, suggest that presently, in the local, Scots pine−dominated, old−growth stands, the general conditions for forest regeneration and for maintaining a long−term demographic stability are unfavorable. Most probably, the regeneration of this type of forest has an episodic, ‘wave−like’ character and corresponds to the ‘catastrophic’ model, according to which the successful regeneration of current dominants (especially Scots pine, silver and downy birch, black alder) must be preceded by a stand−initiating (stand−replacing) disturbance, leading to total or partial, but heavy, destruction of the currently existing stand. At the moment, it would be difficult to predict, however, if and when such a disturbance will affect the stands under investigation. Thus, we predict that in the nearest future at least, the state of overall demographic unbalance will continue or even increase.
Źródło:
Sylwan; 2020, 164, 06; 443-453
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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