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Community trait overdispersion due to trophic interactions: concerns for assembly process inference
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences. Univ Zurich, Dept Evolutionary Biol & Environm Studies, Winterthurerstr 190, CH-8057 Zurich, Switzerland.
2016 (English)In: Proceedings of the Royal Society of London. Biological Sciences, ISSN 0962-8452, E-ISSN 1471-2954, Vol. 283, no 1840, 20161729Article in journal (Refereed) Published
Abstract [en]

The expected link between competitive exclusion and community trait over-dispersion has been used to infer competition in local communities, and trait clustering has been interpreted as habitat filtering. Such community assembly process inference has received criticism for ignoring trophic interactions, as competition and trophic interactions might create similar trait patterns. While other theoretical studies have generally demonstrated the importance of predation for coexistence, ours provides the first quantitative demonstration of such effects on assembly process inference, using a trait-based ecological model to simulate the assembly of a competitive primary consumer community with and without the influence of trophic interactions. We quantified and contrasted trait dispersion/clustering of the competitive communities with the absence and presence of secondary consumers. Trophic interactions most often decreased trait clustering (i.e. increased dispersion) in the competitive communities due to evenly distributed invasions of secondary consumers and subsequent competitor extinctions over trait space. Furthermore, effects of trophic interactions were somewhat dependent on model parameters and clustering metric. These effects create considerable problems for process inference from trait distributions; one potential solution is to use more process-based and inclusive models in inference.

Place, publisher, year, edition, pages
2016. Vol. 283, no 1840, 20161729
Keyword [en]
community assembly, community structure, process inference, trophic interactions, trait distribution
National Category
Ecology Evolutionary Biology
Identifiers
URN: urn:nbn:se:umu:diva-130050DOI: 10.1098/rspb.2016.1729ISI: 000386490000015OAI: oai:DiVA.org:umu-130050DiVA: diva2:1065573
Available from: 2017-01-16 Created: 2017-01-11 Last updated: 2017-01-16Bibliographically approved

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Pontarp, Mikael
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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
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  • asciidoc
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