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Wyszukujesz frazę "silver fir" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Potencjalny zasięg klimatyczny jodły (Abies alba Mill.) w Polsce
Potential climatic range for Abies alba Mill. in Poland
Autorzy:
Bolibok, L.
Zajączkowski, J.
Dobrowolska, D.
Mionskowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/989280.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewa lesne
jodla pospolita
Abies alba
zasieg wystepowania
potencjalny zasieg klimatyczny
Polska
silver fir
natural range potential climatic range
biocilmate envelops
Opis:
Numerous examples of silver fir stands growing outside its geographical range in northern Poland suggest that this species could be used in a greater extend in creation of managed forest stands. Climatic conditions could potentially constrain the use of this species in some parts of country. The objective of this work was to determine the potential climatic range of Abies alba in Poland. The bioclimatic envelope models were used to identify areas in which selected climatic variables show the same range of variability as observed within natural range of this species. Climatic data with 10' spatial resolution were used. The outcome of the analysis depends to large extent on the demarcation of natural range (in which the variability of tolerable climatic conditions is assessed). The model basing on the climatic conditions in whole natural range of silver fir in Europe suggest that almost whole area of Poland is suitable to fir, but models basing only of climatic conditions in Polish part of its natural range are much more conservative. In the last case the difference in extent between natural range and potential climatic range was smaller. As genetic variability of Polish fir populations is rather low, they are supposed to have constrained adaptative abilities. Forest managers should not focus on planting silver fir outside its natural range, but they rather should consider reintroduction of fir in parts of natural range from where it retreated in 20th century.
Źródło:
Sylwan; 2016, 160, 06; 519-528
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ wielkości luki na wzrost i rozwój jodły pospolitej (Abies alba Mill.) w drzewostanach mieszanych w rezerwacie Jata
The effect of canopy gaps on growth and development of silver fir [Abies alba Mill.] regeneration in mixed stands in the Jata reserve
Autorzy:
Dobrowolska, D.
Powiązania:
https://bibliotekanauki.pl/articles/973193.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
rezerwat Jata
Abies alba
rezerwaty przyrody
odnowienia naturalne
odnowienia podokapowe
jodła pospolita
wzrost roślin
żywotność
leśnictwo
drzewa leśne
silver fir
canopy gaps
vitality
crown length
Opis:
The study was carried out in mixed stands in Jata reserve. All gaps over than 20 m2 were localized. The aim of the study was to describe the structure and vitality of silver fir regeneration in gaps and under stand canopy. Following hypothesis was tested: better condition for fir growth is in small gaps, in bigger gaps fir is decreased by the development of deciduous tree species. It was found that gap size did not influence on the quantity of fir regeneration. The hypothesis was rejected. In mixed stands of the Jata reserve fir was not the dominant tree species not only in gaps but also under the stand canopy. The vitality of fir trees has been improved in last years, what suggests the increment in tree crowns lenght.
Źródło:
Sylwan; 2007, 151, 03; 29-35
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rola luk w odnawianiu drzewostanów mieszanych w rezerwacie Jata
Role of gaps in regeneration of mixed stands in the Jata reserve
Autorzy:
Dobrowolska, D.
Powiązania:
https://bibliotekanauki.pl/articles/1015995.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
rozwoj roslin
wzrost roslin
sklad gatunkowy
rezerwat Jata
rezerwaty przyrody
lesnictwo
drzewostany mieszane
odnowienia naturalne
struktura drzewostanu
odnowienia podokapowe
drzewa lesne
canopy gaps
natural regeneration
silver fir
disturbances
Opis:
The study was conducted in the Jata reserve (total area is 1117 ha), which is the furthest natural silver fir (Abies alba Mill.) location in north−eastern Europe. The aim of the investigation was to: (i) determine influence of stand structure and species composition on regeneration, (ii) reveal the role of canopy gaps in the forest development, (iii) recognize how the gap size determines the establishment, growth and development of tree species in the mixed stands. The investigation was carried out in chosen mixed stands with the share of fir (≤50%). All gaps defined as openings in the canopy ≥20 m2 in area that intersected the transect were localized. Natural regeneration was measured in gaps. Gaps initiated the processes of regeneration in mixed stands. It was found that gaps increased biodiversity in mixed stands – the regeneration of shrubs was possible only in gaps. Gap size did not influence the quantity of tree species regeneration. On the quantity of fir, spruce, hornbeam, sycamore and aspen influence the number of tree species in gap surrounding. Better conditions for regeneration of tree species were under the fresh mixed broadleaved site type (LMśw). The dominant tree species regenerated in gaps were hornbeam and sycamore.
Źródło:
Sylwan; 2007, 151, 04; 14-25
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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