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    Wyświetlanie 1-3 z 3
    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
    Tytuł:
    Liczebność odnowienia naturalnego w lukach w drzewostanach jodłowo-bukowych w Świętokrzyskim Parku Narodowym
    Number of natural regeneration of gaps in fir-beech stands in the Swietokrzyski National Park
    Autorzy:
    Wrzesiński, P.
    Dobrowolska, D.
    Krajewski, S.
    Zajączkowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/989083.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Swietokrzyski Park Narodowy
    drzewostany jodlowo-bukowe
    luki drzewostanowe
    wielkosc luki
    odnowienia naturalne
    podrost
    sklad gatunkowy
    jodla pospolita
    Abies alba
    buk zwyczajny
    Fagus sylvatica
    wzrost roslin
    gap dynamics
    canopy gaps
    disturbance
    shade tolerance
    competition
    Opis:
    Forest gaps, openings in the canopy caused by death of one or more trees, are the dominant form of natural disturbance in the temperate forests. Gaps play a critical role in driving stand dynamics and influencing forest growth cycle. They increase habitat diversity, structural complexity, fauna and flora species diversity. The size of a gap may strongly influence tree species regeneration composition, vegetation growth, nutrient cycling, microclimate and may have considerable effect on a number of biological processes. The main aim of this study was to understand the effects of gap size diversity on species composition and number of natural regeneration. The study was carried out in near−natural mixed stands dominated by beech (Fagus sylvatica L.) and silver fir (Abies alba Mill.) representing different development stages and phases in the Świętokrzyski National Park, (central Poland). All gaps over than 20 m 2 intersected by a transects line were sampled. All saplings and seedlings were counted in circular plots (10 m²) evenly spaced along the long axis in the N−S and E−W gradients of each gap. Natural regeneration was analyzed for 62 canopy gaps of various sizes. The gaps were classified into three size classes: small ≤100 m², medium 101−250 m² and large >250 m². The gap size ranged from 21 to 397 m², with a median of 104 m². The dominant tree species regenerated in gaps were fir (69%) and beech (24%). The number of regeneration significantly depended on the gap size (p=0.027). The highest frequency of saplings was found in gaps of ≤100 m². The number of natural regeneration was significantly negatively correlated with gap size (r=–0.261, p=0.040). The density of silver fir regeneration was significantly higher in gaps of ≤100 m² and 101−250 m² (p<0.05). The share of fir in stand species composition effected on the number of silver fir and European beech regeneration. The results of this study demonstrated the utility of gap−based approach for better understanding ecosystem responses to tree cutting for modern forest management.
    Źródło:
    Sylwan; 2017, 161, 06; 485-495
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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