Environmental heterogeneity affects the location of modelled communities along the niche-neutrality continuum

Avi Bar-Massada, Rafi Kent, Yohay Carmel

Research output: Contribution to journalArticlepeer-review

Abstract

The continuum hypothesis has been proposed as a means to reconcile the contradiction between the niche and neutral theories. While past research has shown that species richness affects the location of communities along the niche-neutrality continuum, there may be extrinsic forces at play as well. We used a spatially explicit continuum model to quantify the effects of environmental heterogeneity, comprising abundance distribution and spatial configuration of resources, on the degree of community neutrality. We found that both components of heterogeneityaffect the degree of community neutrality and that species' dispersal characteristics affect the neutrality-heterogeneity relationship. Narrower resource abundance distributions decrease neutrality, while spatial configuration, which is manifested by spatial aggregation of resources, decreases neutrality at higher aggregation levels. In general, the degree of community neutrality was affected by complex interactions among spatial configuration of resources, their abundance distributions and the dispersal characteristics of species in the community. Our results highlight the important yet overlooked role of the environment in dictating the location of communities along the hypothesized niche-neutrality continuum.

Original languageEnglish
Article number20133249
JournalProceedings of the Royal Society B: Biological Sciences
Volume281
Issue number1783
DOIs
StatePublished - 26 Mar 2014

Keywords

  • Continuum hypothesis
  • Environmental heterogeneity
  • Neutrality
  • Niche

ASJC Scopus subject areas

  • General Agricultural and Biological Sciences
  • General Environmental Science
  • General Immunology and Microbiology
  • General Biochemistry, Genetics and Molecular Biology

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