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Edge effects on the cavity-nesting hymenopteran communities and their natural enemies within fragmented landscapes

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Abstract

Changes in landscape structure have increased the edge amount between different environments, and its implications for biodiversity may vary depending on the level of analysis, ecological groups, and species life history. We investigated the effect of distance from the forest edge on species of solitary wasps and bees and their associated natural enemies, on a gradient from 200 m into the anthropogenic matrix to 200 m into the forest, in Atlantic Forest biome in Brazil. In general, species were positively affected by forest edge proximity, while those forest specialists were more negatively influenced. The natural enemy species were more dependent on the distribution of their hosts than on the edge effect directly. Caterpillar and spider hunters seem to be positively affected by the edge, while pollen collectors progressively decrease their richness and abundance from the matrix towards the interior of forest area, and cockroach hunters present an opposite response. We demonstrate the importance of forest conservation and reforestation programs, not only by some cavity-nesting wasps and bees being entirely dependent on forests to persist, but also because most species sampled here depend on being close to a forest edge (less than 100 m) to carry out their ecological holes. Therefore, understanding how different species respond to environmental and landscape changes and may depend on staying close to forests is essential for effective management and planning strategies for biodiversity conservation.

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All data generated or analyzed during this study are included in this published article and its Supplementary information files.

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Acknowledgements

We thank the excellent team of experts who identified the species: M.Sc. Bolívar Rafael Garcete Barrett (Federal University of Paraná), Dr. Gabriel Augusto Rodrigues de Melo (Federal University of Paraná), Dr. Jorge M. González (California State University, Fresno), Dra. Angélica Maria Penteado Dias (Federal University of São Carlos), Dra. Cátia Mello Patiu (Federal University of Rio de Janeiro), and Dr. Marcelo Teixeira Tavares (Federal University of Espírito Santo). We are grateful to the owners of the farms in the municipality of Guarapuava where collections were conducted.

Funding

The study was financially supported by FAPESP (Fundação de Amparo à Pesquisa do Estado de São Paulo), CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico), and CAPES (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior).

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CNQ, JPAD collected the data and GAA made the preparation to analysis. MCR,PCM and JPAD made the analysis. GAA, MLTB and JPAD wrote the manuscript. MLTB was supervisor. All authors revised the text.

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Correspondence to Maria Luisa Tunes Buschini.

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The authors declare no competing interests.

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Manuscript editor: James Nieh

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Alves, G.A., de Deus, J.P.A., Montagnana, P.C. et al. Edge effects on the cavity-nesting hymenopteran communities and their natural enemies within fragmented landscapes. Apidologie 55, 24 (2024). https://doi.org/10.1007/s13592-024-01061-z

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  • DOI: https://doi.org/10.1007/s13592-024-01061-z

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