| Beyond the ecological: biological invasions alter natural selection on a native plant species. | |
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MedLine Citation:
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PMID: 18481527 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Biological invasions can have strong ecological effects on native communities by altering ecosystem functions, species interactions, and community composition. Even though these ecological effects frequently impact the population dynamics and fitness of native species, the evolutionary consequences of biological invasions have received relatively little attention. Here, I show that invasions impose novel selective pressures on a native plant species. By experimentally manipulating community composition, I found that the exotic plant Medicago polymorpha and the exotic herbivore Hypera brunneipennis alter the strength and, in some instances, the direction of natural selection on the competitive ability and anti-herbivore defenses of the native plant Lotus wrangelianus. Furthermore, the community composition of exotics influenced which traits were favored. For example, high densities of the exotic herbivore Hypera selected for increased resistance to herbivores in the native Lotus; however, when Medicago also was present, selection on this defense was eliminated. In contrast, selection on tolerance, another plant defense trait, was highest when both Hypera and Medicago were present at high densities. Thus, multiple exotic species may interact to influence the evolutionary trajectories of native plant populations, and patterns of selection may change as additional exotic species invade the community. |
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Authors:
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Jennifer A Lau |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Ecology Volume: 89 ISSN: 0012-9658 ISO Abbreviation: Ecology Publication Date: 2008 Apr |
Date Detail:
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Created Date: 2008-05-16 Completed Date: 2008-10-28 Revised Date: 2009-11-19 |
Medline Journal Info:
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Nlm Unique ID: 0043541 Medline TA: Ecology Country: United States |
Other Details:
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Languages: eng Pagination: 1023-31 Citation Subset: IM |
Affiliation:
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Center for Population Biology, One Shields Avenue, University of California, Davis, California 95616, USA. jenlau@msu.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Beetles / physiology* Conservation of Natural Resources Ecosystem* Feeding Behavior Lotus / genetics*, physiology* Medicago / physiology* Selection, Genetic* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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