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The dimensionality of ecological networks
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Number of Authors: 182013 (English)In: Ecology Letters, ISSN 1461-023X, E-ISSN 1461-0248, Vol. 16, no 5, p. 577-583Article in journal (Refereed) Published
Abstract [en]

How many dimensions (trait-axes) are required to predict whether two species interact? This unanswered question originated with the idea of ecological niches, and yet bears relevance today for understanding what determines network structure. Here, we analyse a set of 200 ecological networks, including food webs, antagonistic and mutualistic networks, and find that the number of dimensions needed to completely explain all interactions is small (<10), with model selection favouring less than five. Using 18 high-quality webs including several species traits, we identify which traits contribute the most to explaining network structure. We show that accounting for a few traits dramatically improves our understanding of the structure of ecological networks. Matching traits for resources and consumers, for example, fruit size and bill gape, are the most successful combinations. These results link ecologically important species attributes to large-scale community structure.

Place, publisher, year, edition, pages
2013. Vol. 16, no 5, p. 577-583
Keywords [en]
Ecological networks, food web structure, intervality, niche space, species traits, scaling
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:su:diva-161703DOI: 10.1111/ele.12081ISI: 000318077200002PubMedID: 23438174OAI: oai:DiVA.org:su-161703DiVA, id: diva2:1260975
Available from: 2018-11-06 Created: 2018-11-06 Last updated: 2018-11-06Bibliographically approved

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Eklöf, AnnaKopp, JasonBosch, JordiDalsgaard, Bode Sassi, ClaudioGaletti, MauroRader, RominaRodrigo, AnselmTylianakis, Jason M.Vázquez, Diego P.Allesina, Stefano
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Department of Physical Geography and Quaternary Geology
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