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The diversity of interaction types drives the functioning of ecological communities

Vincent Miele, Christian Guill, Rodrigo Ramos-Jiliberto, Sonia Kéfi
doi: https://doi.org/10.1101/411249
Vincent Miele
1Université de Lyon, F-69000 Lyon; Université Lyon 1; CNRS, UMR5558, Laboratoire de Biométrie et Biologie Évolutive, F-69622 Villeurbanne, France
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Christian Guill
2Institut für Biochemie und Biologie, Universität Potsdam, Potsdam, Germany
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Rodrigo Ramos-Jiliberto
3GEMA Center for Genomics, Ecology & Environment, Universidad Mayor, Camino La Pirámide 5750, Huechuraba, Santiago, Chile
4Programas de Postgrado, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso. Av. Brasil 2950, Valparaíso, Chile
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Sonia Kéfi
5Institut des Sciences de l’Evolution de Montpellier, CNRS, Université de Montpellier, IRD, EPHE, Montpellier, France
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Abstract

Ecological communities are undeniably diverse, both in terms of the species that compose them as well as the type of interactions that link species to each other. Despite this long-recognition of the coexistence of multiple interaction types in nature, little is known about the consequences of this diversity for community functioning. In the ongoing context of global change and increasing species extinction rates, it seems crucial to improve our understanding of the drivers of the relationship between species diversity and ecosystem functioning.

Here, using a multispecies dynamical model of ecological communities including various interaction types (e.g. competition for space, predator interference, recruitment facilitation), we studied the role of the presence and the intensity of these interactions for species diversity, community functioning (biomass and production) and the relationship between diversity and functioning.

Taken jointly, the diverse interactions have significant effects on species diversity, whose amplitude and sign depend on the type of interactions involved and their relative abundance. They however consistently increase the slope of the relationship between diversity and functioning, suggesting that species losses might have stronger effects on community functioning than expected when ignoring the diversity of interaction types and focusing on feeding interactions only.

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted September 07, 2018.
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The diversity of interaction types drives the functioning of ecological communities
Vincent Miele, Christian Guill, Rodrigo Ramos-Jiliberto, Sonia Kéfi
bioRxiv 411249; doi: https://doi.org/10.1101/411249
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The diversity of interaction types drives the functioning of ecological communities
Vincent Miele, Christian Guill, Rodrigo Ramos-Jiliberto, Sonia Kéfi
bioRxiv 411249; doi: https://doi.org/10.1101/411249

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