In stable, unmanaged grasslands local factors are more important than landscape-level factors in shaping spider assemblages

摘要: Previous studies reported that landscape-level factors are vital to support diversity of spiders in strongly modified arable lands and disturbed habitats such as managed semi-natural grasslands. Cropland management (ploughing, fertilization, pest management) agricultural practices (mowing grazing) destroy and/or modify regularly the spider assemblages; thus, continuous recolonization from surrounding landscape is sustain species pool. On contrary, we hypothesized unmanaged grasslands, assemblages stable importance limited, local become much more important drivers shaping than factors. We tested on abundance richness At landscape-level, found only isolation had significant effect total abundance, hunting habitat specialist species, a frequent (Gnaphosa mongolica). scale, however, four out five studied influenced significantly two (Alopecosa psammophila, Berlandia cinerea). Species increased by plant cover, litter patch size, while decreased bare ground cover. role maintaining richness; this just opposite conclusion was earlier for ecosystems, where effects crucial providing recolonization.