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    Wyświetlanie 1-4 z 4
    Tytuł:
    Soil preferences and morphological diversity of goldenrods (Solidago L.) from south-western Poland
    Autorzy:
    Szymura, M.
    Szymura, T.H.
    Powiązania:
    https://bibliotekanauki.pl/articles/57379.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    soil preference
    morphological diversity
    goldenrod
    Solidago
    South-Western Poland
    Polska
    plant invasion
    soil property
    invasive plant
    soil condition
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2013, 82, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spatial structure of grassland patches in Poland: implications for nature conservation
    Autorzy:
    Szymura, T.H.
    Szymura, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/57254.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Opis:
    Grasslands provide wide range of ecosystem services, however, their area and quality are still diminishing in Europe. Nowadays, they often create isolated patches inside “sea” of other habitats. We have examined basic structural landscape metrics of grasslands in Poland using CORINE land use database. Characteristics for both all individual patches as well as average values for 10 × 10-km grid covering Poland were examined. We also assessed the percentage of grasslands within protected areas and ecological corridors. We found that in Poland rather small patches (0.3–1 km²) dominate, usually located 200–500 m away from each other. The grasslands had clumped distribution, thus in Poland exist large areas where grasslands patches are separated kilometers from each other. Almost all indices calculated for 10 × 10-km² were correlated, i.e., in regions with high percentage of grasslands, the patches were large, more numerous, placed close to each other, and had more irregular shapes. Our results revealed that the percentage of grasslands within protected areas and ecological corridors did not differ from the average value for Poland. On the other hand, forests were significantly over-represented in protected areas and ecological corridors. These findings suggest that there is no planned scheme for grassland protection at the landscape scale in Poland. Development the scheme is urgent and needs high-quality data regarding distribution of seminatural grasslands patches. In practice, nature conservationists and managers should consider spatial processes in their plans in order to maintain grassland biodiversity.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2019, 88, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spatial variability more influential than soil pH and land relief on thermophilous vegetation in overgrown coppice oak forest
    Autorzy:
    Szymura, T.H.
    Szymura, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/58464.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2013, 82, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Changes in forest cover in Sudety Mountains during the last 250 years: patterns, drivers, and landscape-scale implications for nature conservation
    Autorzy:
    Szymura, T.H.
    Murak, S.
    Szymura, M.
    Radula, M.W.
    Powiązania:
    https://bibliotekanauki.pl/articles/57904.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Opis:
    Historical ecology gives a reference point to explain the contemporary state of particular ecosystems as well as entire landscapes. In this study, we examined the quantitative changes in forest cover in the central part of the Sudety Massif (area ca. 1,120 km²) during the last 250 years. The information regarding forest patch distribution and its changes was derived by comparison of maps from 1747 and the 1970s drawn at scales of 1:33,000 and 1:25,000, respectively. To examine the effect of environmental variables (topography and soil conditions) and human population density on forest patch distribution and its changes (afforestation, deforestation), a set of 100 circular plots with a diameter of 1 km was established. The influence of explanatory variables was examined using regression tree methods. Changes at the level of the entire landscape were tested using a set of 25 landscape windows (5 × 5 km each). We found that the overall forest cover increased to 36.4% in the twentieth century from 30.4% in the middle of the eighteenth century. The ancient forests constituted 59% of the total forest area existing more recently. The forests in the eighteenth century occurred mostly on steep slopes, deep valley bottoms, and summits. The land relief explains more than half of the total variation in forest distribution (R² = 0.56). The effects of soil type and human population density were negligible. The contemporary forest pattern results from both land relief and the historical pattern of human population density in the middle of the eighteenth century (R² = 0.64), while the effect of soil type was negligible. The pattern of deforestation (R² = 0.53) and afforestation (R² = 0.36) results from both land relief as well as recent and nineteenth-century human population density. About 83% of the recent forest area is in physical contact with patches of the ancient forest, which provides an optimistic outlook for the migration of ancient forest species into new areas. Furthermore, changes in landscape structure reveal increased connectivity among forest patches, with potential benefits for the migration of forest species with long-range dispersal.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2018, 87, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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