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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Nicholson, Joshua R. Crutsinger, Gregory M. Fortuna, Miguel A. Jules, Erik S. Bascompte, Jordi Barbour, Matthew A. Julkunen-tiitto, Riitta |
| Description | Author Affiliation: Barbour MA ( Department of Zoology, University of British Columbia, Vancouver, BC, Canada V6T 1Z4); Fortuna MA ( Department of Evolutionary Biology and Environmental Studies, University of Zurich, 8057 Zurich, Switzerland); Bascompte J ( Department of Evolutionary Biology and Environmental Studies, University of Zurich, 8057 Zurich, Switzerland); Nicholson JR ( Department of Zoology, University of British Columbia, Vancouver, BC, Canada V6T 1Z4); Julkunen-Tiitto R ( Department of Biology, University of Eastern Finland, FI-80101 Joensuu, Finland); Jules ES ( Department of Biological Sciences, Humboldt State University, Arcata, CA 95521.); Crutsinger GM ( Department of Zoology, University of British Columbia, Vancouver, BC, Canada V6T 1Z4); |
| Abstract | Theory predicts that intraspecific genetic variation can increase the complexity of an ecological network. To date, however, we are lacking empirical knowledge of the extent to which genetic variation determines the assembly of ecological networks, as well as how the gain or loss of genetic variation will affect network structure. To address this knowledge gap, we used a common garden experiment to quantify the extent to which heritable trait variation in a host plant determines the assembly of its associated insect food web (network of trophic interactions). We then used a resampling procedure to simulate the additive effects of genetic variation on overall food-web complexity. We found that trait variation among host-plant genotypes was associated with resistance to insect herbivores, which indirectly affected interactions between herbivores and their insect parasitoids. Direct and indirect genetic effects resulted in distinct compositions of trophic interactions associated with each host-plant genotype. Moreover, our simulations suggest that food-web complexity would increase by 20% over the range of genetic variation in the experimental population of host plants. Taken together, our results indicate that intraspecific genetic variation can play a key role in structuring ecological networks, which may in turn affect network persistence. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 8 |
| Volume Number | 113 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2016-02-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Food Chain Genetic Variation Insects Pathogenicity Plants, Edible Genetics Animals Computer Simulation Ecosystem Genotype Herbivory Host-Pathogen Interactions Physiology Models, Genetic Parasitology Salix Species Specificity Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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