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Coexistence of sympatric carnivores in relatively homogeneous Mediterranean landscapes: functional importance of habitat segregation at the fine-scale level

  • Community ecology - Original research
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Abstract

One of the main objectives of community ecology is to understand the conditions allowing species to coexist. However, few studies have investigated the role of fine-scale habitat use segregation in the functioning of guild communities in relatively homogeneous landscapes where opportunities for coexistence are likely to be the most restrictive. We investigate how the process of habitat use differentiation at the home range level according to the degree of specialism/generalism of species can lead to coexistence between guild species. We examine differences in fine-scale habitat use and niche separation as potential mechanisms explaining the coexistence of five sympatric carnivore species that differ in life history traits (Iberian lynx, Eurasian badger, Egyptian mongoose, common genet and red fox) by collecting data from systematic track censuses in a relatively homogeneous Mediterranean landscape. We found that a higher degree of specialism determines the segregation of species among the fine-scale ecological niche dimensions defined using quantitative elements associated with vegetation, landscape, prey availability and human disturbance. The species with the lowest total performance over the set of variables did not exhibit segregation in the use of habitat at this level. Our study indicates that in relatively homogeneous landscapes, there exist subtle patterns of habitat partitioning over small-scale gradients of habitat determinants as a function of the degree of specialism of carnivore species within a guild. Our results also suggest that coexistence between generalist species may be permitted by fine-scale spatial–temporal segregation of activity patterns or trophic resource consumption, but not fine-scale habitat use differentiation.

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Acknowledgments

This research was funded by the projects CGL2004-00346/BOS (Spanish Ministry of Education and Science) and 17/2005 (Spanish Ministry of the Environment; National Parks Research Program). Land-Rover Spain lent us two vehicles for this work. We are especially grateful to J. C. Rivilla and S. Desniça for assistance during fieldwork and to M. González and N. Fernández for their valuable suggestions on earlier versions of the manuscript. C. Soto was also supported by a JAE-Predoc grant from the Consejo Superior de Investigaciones Científicas.

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  1. Departamento de Biología de la Conservación, Estación Biológica de Doñana CSIC, C/Américo Vespucio, s/n, 41092, Isla de la Cartuja, Seville, Spain

    Carolina Soto & Francisco Palomares

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  1. Carolina Soto
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  2. Francisco Palomares
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Correspondence to Carolina Soto.

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Communicated by Andreas Zedrosser.

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Soto, C., Palomares, F. Coexistence of sympatric carnivores in relatively homogeneous Mediterranean landscapes: functional importance of habitat segregation at the fine-scale level. Oecologia 179, 223–235 (2015). https://doi.org/10.1007/s00442-015-3311-9

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