A genetic similarity rule determines arthropod community structure

R. K. Bangert, R. J. Turek, B. Rehill, G. M. Wimp, J. A. Schweitzer, Gerard J Allan, J. K. Bailey, G. D. Martinsen, Paul S Keim, R. L. Lindroth, Thomas G Whitham

Research output: Contribution to journalArticle

91 Citations (Scopus)

Abstract

We define a genetic similarity rule that predicts how genetic variation in a dominant plant affects the structure of an arthropod community. This rule applies to hybridizing cottonwood species where plant genetic variation determines plant-animal interactions and structures a dependent community of leaf-modifying arthropods. Because the associated arthropod community is expected to respond to important plant traits, we also tested whether plant chemical composition is one potential intermediate link between plant genes and arthropod community composition. Two lines of evidence support our genetic similarity rule. First, in a common garden experiment we found that trees with similar genetic compositions had similar chemical compositions and similar arthropod compositions. Second, in a wild population, we found a similar relationship between genetic similarity in cottonwoods and the dependent arthropod community. Field data demonstrate that the relationship between genes and arthropods was also significant when the hybrids were analysed alone, i.e. the pattern is not dependent upon the inclusion of both parental species. Because plant-animal interactions and natural hybridization are common to diverse plant taxa, we suggest that a genetic similarity rule is potentially applicable, and may be extended, to other systems and ecological processes. For example, plants with similar genetic compositions may exhibit similar litter decomposition rates. A corollary to this genetic similarity rule predicts that in systems with low plant genetic variability, the environment will be a stronger factor structuring the dependent community. Our findings argue that the genetic composition of a dominant plant can structure higher order ecological processes, thus placing community and ecosystem ecology within a genetic and evolutionary framework. A genetic similarity rule also has important conservation implications because the loss of genetic diversity in one species, especially dominant or keystone species that define many communities, may cascade to negatively affect the rest of the dependent community.

Original languageEnglish (US)
Pages (from-to)1379-1391
Number of pages13
JournalMolecular Ecology
Volume15
Issue number5
DOIs
StatePublished - Apr 2006

Fingerprint

arthropod communities
Arthropods
arthropod
community structure
Chemical analysis
Populus
Plant Structures
arthropods
genetic variation
plant genetics
Animals
Ecosystem
Genes
chemical composition
Animal Structures
Chemical plants
Plant Genes
Ecology
genetic similarity
keystone species

Keywords

  • Arthropod community composition
  • Assembly rules
  • Chemical composition
  • Genetic composition
  • Populus
  • Similarity rule

ASJC Scopus subject areas

  • Ecology
  • Biochemistry, Genetics and Molecular Biology(all)
  • Biochemistry

Cite this

A genetic similarity rule determines arthropod community structure. / Bangert, R. K.; Turek, R. J.; Rehill, B.; Wimp, G. M.; Schweitzer, J. A.; Allan, Gerard J; Bailey, J. K.; Martinsen, G. D.; Keim, Paul S; Lindroth, R. L.; Whitham, Thomas G.

In: Molecular Ecology, Vol. 15, No. 5, 04.2006, p. 1379-1391.

Research output: Contribution to journalArticle

Bangert, RK, Turek, RJ, Rehill, B, Wimp, GM, Schweitzer, JA, Allan, GJ, Bailey, JK, Martinsen, GD, Keim, PS, Lindroth, RL & Whitham, TG 2006, 'A genetic similarity rule determines arthropod community structure', Molecular Ecology, vol. 15, no. 5, pp. 1379-1391. https://doi.org/10.1111/j.1365-294X.2005.02749.x
Bangert, R. K. ; Turek, R. J. ; Rehill, B. ; Wimp, G. M. ; Schweitzer, J. A. ; Allan, Gerard J ; Bailey, J. K. ; Martinsen, G. D. ; Keim, Paul S ; Lindroth, R. L. ; Whitham, Thomas G. / A genetic similarity rule determines arthropod community structure. In: Molecular Ecology. 2006 ; Vol. 15, No. 5. pp. 1379-1391.
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