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Wyszukujesz frazę "vegetation typology" wg kryterium: Wszystkie pola


Wyświetlanie 1-2 z 2
Tytuł:
Changes in the spruce forests of the Polish Tatra Mts. during the last 80 years
Autorzy:
Kozłowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/294585.pdf
Data publikacji:
2009
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
spruce forests
Polish Tatra Mts.
floristic changes during 80 years
vegetation typology
Opis:
On the basis of the historical (dating from the 1920s) and contemporary phytosociological relevés, taken in the spruce forests of the Polish Tatra Mts., the changes were determined that took place in these forests. This area had been for centuries under the influence of human economic activities, mainly pasturing and wood extraction, and then protected in the Tatra National Park. These changes differ according to the altitudinal vegetation belts. In the coniferous forests of the upper montane belt, the changes due to wind breaks or tree stand ageing did not lead to transition to other forest associations. A tendency can yet be noticed of losing a part of the species combinations characteristic for the associations or higher syntaxonomic units, which might be linked with the stopping of grazing in the forests and development of the undergrowth of tall herb character. The association of the fir-and-spruce forests in the lower montane belt displayed much bigger changes. There was an increase of the role of species of the deciduous forests, while the role of the coniferous forest species was limited in the studied patches, which clearly indicates the evolution of the forests towards the beech woods, typical for the lower montane belt. This means a progressing limitation of the spruce forests in the limestone Tatras to the advantage of return of the beech woodsdominated there in older time.
Źródło:
Landform Analysis; 2009, 10; 64-69
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zróżnicowanie roślinności gospodarczych borów sosnowych na tle typów siedliskowych lasu w Nadleśnictwie Turawa
Vegetation diversity of the Scots pine stands in different forest sites in the Turawa Forest District
Autorzy:
Stefańska-Krzaczek, E.
Pech, P.
Powiązania:
https://bibliotekanauki.pl/articles/1316236.pdf
Data publikacji:
2014
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
drzewostany sosnowe
drzewostany gospodarcze
bor sosnowy
typy siedliskowe lasu
zroznicowanie fitosocjologiczne
zbiorowiska roslinne
gatunki wskaznikowe
bogactwo gatunkowe
Nadlesnictwo Turawa
forest typology
indicator species
secondary forest communities
Pinus sylvestris
Opis:
The utility of phytocenotic indices in the diagnosis and classification of forest sites might be limited because of vegetation degeneration in managed forests. However, even in secondary communities it may be possible to determine indicator species, although these may differ from typical and well known plant indicators. The aim of this work was to assess the vegetation diversity of Scots pine stands in representative forest site types along a moisture and fertility gradient. In total 120 sample plots from Turawa forests were included in the study. These plots represented young (21–40 years) and old (> 80 years) Scots-pine-dominated stands. The forest sites were categorized according to Polish site classification. Four site categories were studied: Boew (very nutrient-poor and mesic sites), BMoew (nutrient-poor and mesic sites), BMw (nutrient-poor and moist sites), LMw (quite nutrient-rich and moist sites). The species composition of the forest patches studied hardly differed among forest site types. Almost all of the vegetation in site Boew was different from both moist site types (BMw and LMw). Sites Boew andLMwhad the exclusive species determined as site indicators. Moreover, young stands had their own site type indicator species which differed from old stands. Numerical classification showed that only two plant communities were widespread: Leucobryo-Pinetum in Boew and BMoew, and the community of Pinus sylvestris and Molinia caerulea in BMoew, BMw, LMw. In secondary communities typical indicator species may not be useful, but it is possible to determinate species that are locally unique to forest site type. Despite the convergence in the composition of the plant community resulting from tree stand unification, plant communities have the capacity for a more diverse composition. Tree stand conversion can increase phytocenotic diversity.
Źródło:
Leśne Prace Badawcze; 2014, 75, 1; 77-87
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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