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Dung beetle diversity and community composition along a fragmented landscape in an altitudinal gradient in southeastern Mexico

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Abstract

This study aimed to investigate the diversity patterns of Scarabaeinae community along an altitudinal gradient under intense anthropogenic pressure in the central region of Chiapas, Mexico, considering the influence of environmental and landscape variables. We sampled dung beetles using baited pitfall traps in four sites located at different altitudes (870 m, 1120 m, 1620 m, 2370 m). We collected a total of 1,233 individuals belonging 32 species, 14 genera and seven tribes. Four species account 66.74% of the total abundance, while another 20 are represented by a maximum of six individuals, including 10 singletons. Assemblages were more even at lower altitude sites and diversity was inversely related to increasing altitude. Similarity analysis indicated an evident segregation in species composition among the sites, forming three distinct dung beetle assemblages according to vegetation type. Within the gradient, we found 12 species with a strong association to the studied habitats. Redundancy analysis explained 41.3% of the variation in the beetle community, the simplified model included the variables effective mesh size, altitude and canopy cover. These results suggest that fragmentation caused by human activities are leading to a biotic homogenization in dung beetle assemblages, with a high proportion of rare and opportunistic species. Nevertheless, this study contributes to the scarce knowledge regarding diversity of dung beetles that inhabits in altitudinal gradients in the Central region of Chiapas.

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Acknowledgements

The authors are grateful for the support provided by Rolando Dávila Sánchez, Ana Gómez Méndez, Edivaldo Rodríguez López, Carlos Valdez Ramírez and Jonatan Agustín Sánchez during different stages of the research. Gibrán Sánchez-Hernández also thanks the Master of Science program at El Colegio de la Frontera Sur (ECOSUR), Mexico. This work was supported partially by the Consejo Nacional de Ciencia y Tecnología (CONACyT), Mexico, with the postgraduate fellowship No. 594851 to Gibrán Sánchez-Hernández. Reviewer comments helped improve this manuscript.

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GSH and BG conceived the ideas, designed the methodology, and collected the data; GSH and FGMC analyzed the data with input from other authors; The first draft of the manuscript was written by GSH and all authors reviewed and made substantial improvements to the final version.

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Correspondence to Gibrán Sánchez-Hernández.

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Sánchez-Hernández, G., Gómez, B., Chamé-Vázquez, E.R. et al. Dung beetle diversity and community composition along a fragmented landscape in an altitudinal gradient in southeastern Mexico. Biologia 77, 1027–1038 (2022). https://doi.org/10.1007/s11756-022-01036-4

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  • DOI: https://doi.org/10.1007/s11756-022-01036-4

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