Distribution and coexistence of shrews in patchy landscapes: A field test of multiple hypotheses

摘要: Despite the important role of shrews (Soricomorpha: Soricidae) in functioning ecosystems, as predators and prey, effects habitat loss fragmentation on this guild mammals are still unclear. We studied distribution 5 species (the greater white toothed shrew Crocidura leucodon; lesser suaveolens; pigmy Sorex minutus; Appennine samniticus Etruscan Suncus etruscus) a fragmented landscape central Italy. Shrews were trapped with pitfall traps made from plastic water bottles, number increased patch size. A total 170 individuals, captured. widely distributed our study area, however occupancy was determined mainly by vegetation geometrical characteristics patches. Our data supports hypotheses that patterns selection dynamics seasonal abundance (habitat temporal partitioning between similarly sized species) reduce competitive pressure, thus allowing coexistence relatively species-rich assemblages, for such small amounts habitat. The most outcome results is crucial played structure determining patterns. These strongly suggest measurements patches should always be included explanatory variables when studying landscapes.