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Landscape simplification filters species traits and drives biotic homogenization
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Landscape simplification filters species traits and drives biotic homogenization
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Journal Article
Landscape simplification filters species traits and drives biotic homogenization
2015
Overview
Biodiversity loss can affect the viability of ecosystems by decreasing the ability of communities to respond to environmental change and disturbances. Agricultural intensification is a major driver of biodiversity loss and has multiple components operating at different spatial scales: from in-field management intensity to landscape-scale simplification. Here we show that landscape-level effects dominate functional community composition and can even buffer the effects of in-field management intensification on functional homogenization, and that animal communities in real-world managed landscapes show a unified response (across orders and guilds) to both landscape-scale simplification and in-field intensification. Adults and larvae with specialized feeding habits, species with shorter activity periods and relatively small body sizes are selected against in simplified landscapes with intense in-field management. Our results demonstrate that the diversity of land cover types at the landscape scale is critical for maintaining communities, which are functionally diverse, even in landscapes where in-field management intensity is high.
Agricultural intensification may negatively impact biodiversity via a number of mechanisms. Here, Gámez-Virués
et al.
show that landscape simplification acts as an environmental filter to homogenise grassland arthropod communities into pools of species with less specialised functional traits.
