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Article Dans Une Revue Nature Ecology & Evolution Année : 2022

Ecological network complexity scales with area

Kevin Cazelles
Marie-Josée Fortin
Ingo Grass
Kevin Mccann
Sara Reverté
  • Fonction : Auteur
Anselm Rodrigo
Ingolf Steffan-Dewenter
  • Fonction : Auteur
Anna Traveset
Sergi Valverde
Diego Vázquez
Spencer Wood
  • Fonction : Auteur
Dominique Gravel
Tomas Roslin
Wilfried Thuiller
  • Fonction : Auteur
José Montoya

Résumé

Larger geographical areas contain more species-an observation raised to a law in ecology. Less explored is whether biodiversity changes are accompanied by a modification of interaction networks. We use data from 32 spatial interaction networks from different ecosystems to analyse how network structure changes with area. We find that basic community structure descriptors (number of species, links, and links per species) increase with area following a power-law. Yet, the distribution of links per species varies little with area, indicating that the fundamental organization of interactions within networks is conserved. Our null model analyses suggest that the spatial scaling of network structure is determined by factors beyond species richness and the number of links. We demonstrate that biodiversity-area relationships can be extended from species counts to higher levels of network complexity. Therefore, the consequences of anthropogenic habitat destruction may extend from species loss to wider simplification of natural communities.
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Dates et versions

hal-03765314 , version 1 (31-08-2022)

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Núria Galiana, Miguel Lurgi, Vinicius Bastazini, Jordi Bosch, Luciano Cagnolo, et al.. Ecological network complexity scales with area. Nature Ecology & Evolution, 2022, 6 (3), pp.307-314. ⟨10.1038/s41559-021-01644-4⟩. ⟨hal-03765314⟩
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