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Edge effects on insects depend on life history traits: a global meta-analysis

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Abstract

Some species are more affected than others by edge effects resultant from habitat loss and fragmentation, generally due to human activities. As these specific responses depend on biophysical and behavioral traits of organisms, it is expected that the occurrence of species with particular traits will vary between fragment edges and interiors. Edges are also known to often harbor many invasive species. We performed a meta-analysis of the responses of insect species with different life history traits to anthropogenic edges, focusing on the species’ behavioral characteristics and whether they are considered invasive or not. We systematically searched the Web of Science database for papers on this subject published until May 2018. We examined response ratios for 712 comparisons of anthropogenic edge effects on insects. As expected, the responses differed according to the traits evaluated. Soil-foraging and social insects were negatively affected by anthropogenic edges. Conversely, flying and invasive species were favored by edges. Our analyses suggest that edges, by differently affecting different insect groups, have an important role in structuring local insect communities. Finally, the importance of functional traits in studies of edge effects must be highlighted.

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Acknowledgements

We thank Leiza Soares and Juliana Almeida for they help with data analysis. We thank Elmo Borges de Azevedo Koch for his help in finding the articles and insightful discussion of the data. BC and TPC acknowledge the Brazilian Coordination for the Improvement of Higher Education Personnel (CAPES) for their PhD grants; PD was also funded by CAPES via a post-doctorate PNPD grant (Finance Code 001); JHCD acknowledges CNPq for his research grant.

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Correspondence to Bianca Caitano.

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Caitano, B., Chaves, T.P., Dodonov, P. et al. Edge effects on insects depend on life history traits: a global meta-analysis. J Insect Conserv 24, 233–240 (2020). https://doi.org/10.1007/s10841-020-00227-1

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  • DOI: https://doi.org/10.1007/s10841-020-00227-1

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