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Wyszukujesz frazę "Stefańska-Krzaczek, E." wg kryterium: Autor

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    Tytuł:
    Bogactwo gatunkowe osuszonych lasów łęgowych w środowisku miejskim Wrocławia
    Species richness of drained riparian forests in the urban area of Wroclaw
    Autorzy:
    Stefańska-Krzaczek, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/993238.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    miasta
    Wroclaw
    lasy legowe
    tereny osuszone
    Las Osobowicki
    flora
    bogactwo gatunkowe
    rosliny naczyniowe
    wykaz gatunkow
    czynniki siedliska
    warunki hydrologiczne
    ficario−ulmetum
    embankment
    site drying
    disturbed forest
    Opis:
    Las Osobowicki forest is a remnant riparian woodland of the Odra valley, although its site conditions have been anthropogenically disturbed. To assess species richness of the drained forest, floristic data were collected from circular plots with a radius of 5.64 m. Plots were systematically distributed in forest communities. In total, 87 species were identified in the study area, with a mean of 14 species per plot. The share of alien species was minor. Flood prevention caused site drying and, as a result, decrease in species richness of the riparian forest. However, spatial distribution of species number values proves the sustained influence of the moisture factor on the vegetation. Connection of species richness and hydrological conditions is supported by positive correlation between species richness and Ellenberg moisture index.
    Źródło:
    Sylwan; 2013, 157, 05; 366-375
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Florystyczne i fitocenotyczne wskaźniki stanu zachowania lasów zalewowych w miejskiej dolinie rzecznej
    Flotistic and phytocenotic indicators of the conditions of riparian forests in the urban river valley
    Autorzy:
    Stefańska-Krzaczek, E.
    Podgrudna, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/989701.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    miasta
    doliny rzeczne
    lasy legowe
    stan zachowania
    flora
    bogactwo gatunkowe
    zbiorowiska lesne
    zbiorowiska roslinne
    zespol Ficario-Ulmetum minoris
    Las Pilczycki
    warunki siedliskowe
    urban forests
    disturbed forest
    ficario−ulmetum minoris
    hydrotechnical constructions
    Opis:
    Urban river valleys are exposed to strong anthropogenic pressure, but despite these distortions they provide important habitats in urban areas. Not embanked forests are particularly valuable in urban river valleys as they represent fragments of natural vegetation in a highly changed environment. The study assesses the flora and structure of forest communities in a riparian urban forest complex that is under the direct influence of river water. Las Pilczycki Forest in Wrocław (SW Poland) is such a riparian forest island. We analysed the species richness and composition in terms of the phytocoenoses variability and their syntaxonomic classification. We also investigated if the vegetation can indicate a spatial differentiation in habitat conditions. Floristic and phytosociological data were collected from 70 circular plots (100 m&suo2; each) located in a grid. A total of 81 species were recorded, with a mean of 21 species per plot. Most frequent were: Acer campestre, Acer platanoides, Anemone nemorosa, Ficaria verna, Fraxinus excelsior, Galium aparine, Geum urbanum, Impatiens parviflora and Sambucus nigra. In biological spectrum the most numerous were hemicryptophytes, megaphanerophytes and geophytes. The number of alien species was minor (9% of the flora). The most frequent anthropophyte was Impatiens parviflora. Soil moisture, acidity and fertility indices exhibited spatial correlations and they were higher in the western part of the forest. The moisture index was also higher in the northern part. Species richness ranged from 13 to 32 (with a mean of 21 species). Two forms of Ficario−Ulmetum minoris were identified: with Galanthus nivalis and with Tilia cordata. The first was a well−structured riparian community, while the latter one represented the drained floodplain forest. Vegetation units are spatially separated, in the western part of the forest prevails form with Galanthus nivalis, while in the east – with Tilia cordata. In isolated alluvial forests of urban area local site conditions are crucial for the vegetation patches, because of the distortion of river valleys. The absence of flood embankments is not a sufficient condition for maintaining proper structure of riparian forests.
    Źródło:
    Sylwan; 2015, 159, 01; 82-88
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zróżnicowanie roślinności monokultur sosnowych na glebach piaszczystych Borów Tucholskich
    Diversity of vegetation in Scots pine monocultures on sandy soils in the Bory Tucholskie
    Autorzy:
    Stefańska-Krzaczek, E.
    Faltynowicz, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/990036.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Bory Tucholskie
    gleby piaszczyste
    drzewostany sosnowe
    zespol Leucobryo-Pinetum
    monokultury sosnowe
    roslinnosc
    zbiorowiska roslinne
    sklad gatunkowy
    leucobryo−pinetum
    vegetation classification
    stand rotation
    coniferous forest
    low−nutrient forest sites
    Opis:
    Scots pine stands are the most important forest type in Poland and the differentiation of the natural vegetation in these forests is well known. However, the intensive utilization causes the formation of the secondary communities, so that further studies of the vegetation diversity should be carried out with taking into consideration stand age and homogeneity of site conditions. The aim of this work is to assess the diversification of plant communities across the gradient of tree stand age. Scots pine stands on oligotrophic sites of the Przymuszewo Forest District were examined with dividing into six age classes ( 10, 11−20, 21−40, 41−60, 61−80, 81−120 years old). Numerical analysis allowed to differ 4 plant communities: non−forest community of Placynthiella−Cladonia sp. div. related to young stands before crown closure ( 10 years old), secondary forest community of Pinus sylvestris−Cladonia subulata related to young stands just after crown closure (11−20 years), forest communities of Leucobryo−Pinetum variant with Cladonia and typical variant – both related to stands older than 20 years. The identified communities differ in terms of species richness and vertical structure, but they are repetitive combinations of species which can be classified within hierarchical syntaxonomical system. They show common features with the communities of south−western Poland, but differ from plant communities of managed Scots pine forest in the continental part.
    Źródło:
    Sylwan; 2014, 158, 02; 99-106
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wzrost różnorodności gatunkowej chrobotków jako efekt rębni zupełnej na ubogich siedliskach borowych
    Increase of Cladonia species diversity as a consequence of clear-cutting in nutrient-poor forest sites
    Autorzy:
    Stefańska-Krzaczek, E.
    Faltynowicz, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/994072.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    siedliska borowe
    siedliska oligotroficzne
    rebnie zupelne
    drzewostany sosnowe
    chrobotek
    Cladonia
    wystepowanie
    roznorodnosc gatunkowa
    scots pine forest
    managed forest
    ground lichens
    stand age classes
    Opis:
    Clear−cutting impacts site conditions seriously. However, in nutrient−poor sites the effects of stand removal can be minor than in nutrient−rich sites. The aim of this work was to assess whether the clear−cut can improve species diversity of ground Cladonia species, which decline has been observed in forest communities. In stands of different age classes (≤10, 11−20, 21−40, 41−60, 61−80, ≥81 years) in the Przymuszewo Forest District (northern Poland) ground Cladonia species and their cover were recorded on research plots (10×15 m). A total of 24 species were identified in the study area. There were more Cladonia species and they were more abundant in young stands (<20 years old) than in stands older than 60 years. Nine species are significantly more frequent and demonstrated high fidelity in young stands and only one was characteristic for old stands. Composition of Cladonia species depended primarily on stand age and subsequently on canopy or bryophyte cover. In nutrient−poor sites clear−cutting is favourable for Cladonia species diversity.
    Źródło:
    Sylwan; 2013, 157, 12; 929-936
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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