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A genetic basis to community repeatability and stability.

Arthur R Keith1, Joseph K Bailey, Thomas G Whitham

  • 1Department of Biological Sciences, Northern Arizona University, P.O. Box 5640, Flagstaff, Arizona 86011, USA. Arthur.Keith@nau.edu

Ecology
|December 15, 2010
PubMed
Summary
This summary is machine-generated.

Plant genetics influence arthropod communities, showing heritability and year-to-year consistency. This suggests that community stability, an emergent property, can be genetically based and subject to natural selection.

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Area of Science:

  • Ecology
  • Genetics
  • Evolutionary Biology

Background:

  • Genetically based plant traits can shape associated arthropod and microbial communities.
  • Consistency and repeatability of these effects across years remain largely unknown.
  • Heritable and repeatable communities could influence emergent properties like ecological stability.

Purpose of the Study:

  • To determine if plant genetics consistently structure associated arthropod communities over multiple years.
  • To investigate if community stability is heritable and influenced by plant genotype.
  • To assess the repeatability of plant genotype effects on arthropod community composition.

Main Methods:

  • Utilized replicated clones of narrowleaf cottonwood (Populus angustifolia).
  • Examined an arthropod community comprising 103 species over three consecutive years.
  • Analyzed arthropod community data for heritability and repeatability across genotypes and years.

Main Results:

  • Individual tree genotypes supported significantly different arthropod communities with broad-sense heritability.
  • Findings were highly repeatable across three years (repeatability = 0.91), showing consistent community responses.
  • Differences in community stability among genotypes exhibited broad-sense heritability (H(C)2 = 0.32).

Conclusions:

  • Plant genetics play a significant role in structuring associated arthropod communities.
  • Community responses to plant genotypes are consistent and repeatable across years.
  • Ecological stability can be a genetically based trait influenced by natural selection.