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Environmental factors influencing the species composition of acidophilous grassland patches in agricultural lanscapes
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SYSNO ASEP 0377678 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Environmental factors influencing the species composition of acidophilous grassland patches in agricultural lanscapes Author(s) Halas, Petr (UGN-S) RID Number of authors 1 Source Title Moravian Geographical Reports. - : Ústav geoniky AV ČR, v. v. i. - ISSN 1210-8812
Roč. 20, č. 1 (2012), s. 16-27Number of pages 12 s. Publication form Print - P Language eng - English Country CZ - Czech Republic Keywords acidophilous grasslands ; hemeroby ; patch isolation ; regression trees ; Bohemian-Moravian Highland Subject RIV DE - Earth Magnetism, Geodesy, Geography CEZ AV0Z30860518 - UGN-S (2005-2011) Annotation The acidophilous grasslands of the south-western part of the Czech-Moravian Highlands in the Czech Republic were substantially reduced in the 20th century. These patches are addressed in this paper, in terms of the impacts of their size, isolation, and the quality of the surrounding land cover. Species recorded in the acidophilous grasslands are categorized by hemeroby and life form. Multivariate gradient analysis revealed that the greatest proportions of the variability of species data were explained by two local variables (soil pH and the shape of the patch). Some species groups were also substantially influenced by microrelief. The importance of the surrounding land cover for the species composition was studied by means of regression trees. An assumption that, aside from local factors (soil pH and micro-relief), the species composition is significantly influenced by the heterogeneity of the surrounding landscape, was confirmed. Workplace Institute of Geonics Contact Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Year of Publishing 2013 Electronic address http://www.geonika.cz/CZ/CZresearch/CZMgrArchive.html
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