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Wyszukujesz frazę "Andrzejczyk, T." wg kryterium: Autor

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    Wyświetlanie 1-6 z 6
    Tytuł:
    Analiza zagęszczenia samosiewów brzozy i sosny na gniazdach na podstawie modelu promieniowania słonecznego
    Analysis of birch and pine seedling density in regeneration patches on the basis of solar radiation model
    Autorzy:
    Bolibok, L.
    Andrzejczyk, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1013442.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    samosiewy
    hodowla lasu
    czynniki srodowiska
    naslonecznienie
    lesnictwo
    Betula
    zageszczenie roslin
    zmiennosc
    Pinus sylvestris
    brzoza
    sosna zwyczajna
    rebnie gniazdowe
    odnowienia naturalne
    gap
    natural regeneration
    scots pine
    silver birch
    solar radiation model
    spatial variability
    Opis:
    The spatial variability of the density of Scots pine and silver birch natural regeneration in gaps has different pattern in subsequent development stages. The pine seedling density was inversely proportional to the amount of solar radiation reaching the floor in artificial gap estimated by modeling (the highest density occurred in the southern, shaded part of the gap). The top soil layers drying−off that is a result of the insolation is thought to be the main factor limiting seed germination and early growth of both species, however pine response at this stage was greater. The highest birch undergrowth density was observed in the central part of gaps. It might be the result of relatively low root competition of old trees and a good light supply in this part of the gaps.
    Źródło:
    Sylwan; 2008, 152, 02; 10-19
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wysokość siedmioletnich odnowień dębowych na gniazdach w różnych warunkach siedliskowych
    The height of seven-year-old oaks growing in gaps in different forest habitats
    Autorzy:
    Bolibok, L.
    Andrzejczyk, T.
    Drozdowski, S.
    Szeligowski, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/45960.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    hodowla lasu
    rebnie gniazdowe
    odnowienia lasu
    drzewa lesne
    dab szypulkowy
    Quercus robur
    wysokosc drzew
    warunki siedliskowe
    wielkosc gniazd
    zyznosc siedliska
    Źródło:
    Leśne Prace Badawcze; 2011, 72, 2
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sposób powstawania, struktura i produkcyjność drzewostanów bukowo-modrzewiowych w Polsce
    Polish beech-larch stands: their structure, productivity and processes of generation
    Autorzy:
    Andrzejczyk, T.
    Bolibok, L.
    Drozdowski, S.
    Szeligowski, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/45706.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    drzewostany mieszane
    drzewostany dwupietrowe
    drzewostany bukowo-modrzewiowe
    zasobnosc drzewostanu
    struktura drzewostanu
    wiek drzew
    buk zwyczajny
    Fagus sylvatica
    odnowienia lasu
    Źródło:
    Leśne Prace Badawcze; 2011, 72, 4
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ warunków siedliskowych na zróżnicowanie wysokości dębu na gniazdach
    Effect of habitat conditions on the variation of oak height in the gaps
    Autorzy:
    Andrzejczyk, T.
    Bolibok, L.
    Buraczyk, W.
    Drozdowski, S.
    Szeligowski, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/991003.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    rebnie zupelne gniazdowe
    hodowla lasu
    odnowienia lasu
    odnowienia na gniazdach
    drzewa lesne
    dab szypulkowy
    Quercus robur
    wzrost roslin
    warunki siedliska
    siedliska lesne
    bor mieszany swiezy
    las mieszany swiezy
    las swiezy
    pedunculate oak
    clear−cut gap
    plantations
    forest regeneration
    patch cutting system
    Opis:
    The paper presents the study on the height of 10−12−year−old pedunculate oak regeneration in clear−cut gaps in three fertility variants: mezotrophic of poorer productivity (fresh mixed coniferous forest – BMśw), mezotrophic of higher productivity (fresh mixed deciduous forest – LMśw) and eutrophic (fresh deciduous forest – Lśw). BMśw and LMśw were represented by two locations: Gostynin (G) and Parczew (P), while Lśw – by one: Czarna Białostocka (CzB). We analysed the variation of oak height in the patches along the north−south (N−S) and east−west (E−W) gap axes. In each location 3−5 gaps were selected and measurements taken on three transects along the N−S axis located in the western (W), central (C) and eastern (E) part. Significant differences in oak height were found along the N−S axis. Oaks in the BMśw and LMśw habitats in the south−central part, and those in the Lśw habitat in the centre−northern part of the patch were the highest. The height growth of oaks on sandy soils (BMśw, LMśw) was found to be limited by moisture deficit, while on loamy soils (Lśw) – by light deficiency. The differences in oak height along the E−W axis were smaller and less apparent, indicating a tendency towards the reduction of their height growth in the central part of the gap.
    Źródło:
    Sylwan; 2014, 158, 06; 404-413
    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
    Tytuł:
    Struktura i dynamika wielogeneracyjnych starodrzewów sosnowych występujących w obszarach ochrony ścisłej Kaliszki i Sieraków w Kampinoskim Parku Narodowym. Część 1. Zróżnicowanie gatunkowe, zagęszczenie i pierśnicowe pole przekroju
    Structure and dynamics of uneven−aged Scots pine−dominated old−growth stands in Kaliszki and Sieraków strict protection areas in the Kampinos National Park. Part 1. Species composition, tree density and basal area
    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/978936.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    forest dynamics
    long−term research
    old−growth forest
    permanent study plot
    strict protection
    tree
    species composition
    Opis:
    The paper describes changes, which took place over the last 30 years in old−growth forest stands occupying two permanent research plots, established in the Kaliszki and Sieraków strict protection areas in the Kampinos National Park (central Poland). Both plots have a form of ecological transects. The Kaliszki plot is 20 m wide and 700 m long (1.40 ha), while the Sieraków plot (total area of 2.56 ha) consists of two parts: main (40×460 m) and side (40×180 m) transect. In the Kaliszki plot, the stand measurements were conducted in 1993, 2007, and 2017, while in the Sieraków plot – in 1989, 1994, 2006, and 2017. For every tree with breast height diameter (DBH) 5 cm, species identity, DBH and spatial coordinates were determined. Starting from the second census, all trees which had died (‘losses’), as well as trees which exceeded the DBH threshold (‘gains’) since the previous record were noted, as well. The major tree species occurring on sample plots are Scots pine (Pinus sylvestris), pedunculate oak (Quercus robur), silver and downy birch (Betula sp.), and black alder (Alnus glutinosa). During the study period, the overall tree density declined by ca. 50%. The diminishing trends occurred for all dominant tree species. In contrast to major, dominant tree species, the demographic status of a group of minor tree species (lime, hornbeam and maple) was much more stable. One may even speak about some expansion in this case. Particularly, hornbeam density increased rapidly in the period 2006−2017 in some areas of the main transect located in the Sieraków plot. The future studies will show if this tendency will be maintained and will include other regions of sample plots. Assuming a lack of significant disturbances, one may expect that the stands growing on research plots will rather slowly change in the nearest future. Most dynamics will have a quantitative and not qualitative character. One may anticipate, for example, a growing role of pedunculate oak at the expense of Scots pine, however, considering that the two species are rather long−living, they will probably for a long time keep their dominant roles in the stand canopies.
    Źródło:
    Sylwan; 2020, 164, 05; 392-403
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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