![]() Funct Ecol 23:373–379Īrthur AD, Li J, Henry S, Cunningham SA (2010) Influence of woody vegetation on pollinator densities in oilseed Brassica fields in an Australian temperate landscape. We also detected variation in the quality of perching sites, suggesting that for some species (like the goshawk), artificial perching sites cannot compensate for a lack of SWF.Īndersson A, Wallander J, Isaksson D (2009) Predator perches: a visual search perspective. We conclude that SWF are crucial for exploitation of agricultural landscapes by avian predators by providing suitable perching sites for foraging. ![]() Buzzards and eagles were not influenced by the characteristics of SWF, but goshawks preferred relatively large, dense patches. ResultsĪll species spent most of the daytime perching, and preferentially utilized SWF and forest edges. Next, the relative importance of SWF and forest edges, as well as specific characteristics of each habitat, were evaluated using resource selection functions. We compared time spent flying and perching, where perching sites were classified as open space, forest interior, forest edge, and SWF. We followed movements of three avian predator species (northern goshawk, common buzzard, and lesser spotted eagle) in the breeding and post-breeding season to assess their dependence on SWF in agricultural landscapes and to determine the characteristics of woods influencing each species. Although large animals, due to their lower density are less likely to be attributed with SWF, they may depend on these areas to effectively utilize the agricultural landscape matrix. The importance of SWF for biodiversity is usually inferred from presence or abundance data for small animals. Small woody features (SWF tree lines and small woods) in agricultural landscapes provide a substitute for forest conditions for a wide range of species and a suitable edge habitat for ecotone species.
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