| Propagule pressure and persistence in experimental populations. | |
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MedLine Citation:
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PMID: 17148238 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Average inoculum size and number of introductions are known to have positive effects on population persistence. However, whether these factors affect persistence independently or interact is unknown. We conducted a two-factor experiment in which 112 populations of parthenogenetic Daphnia magna were maintained for 41 days to study effects of inoculum size and introduction frequency on: (i) population growth, (ii) population persistence and (iii) time-to-extinction. We found that the interaction of inoculum size and introduction frequency-the immigration rate-affected all three dependent variables, while population growth was additionally affected by introduction frequency. We conclude that for this system the most important aspect of propagule pressure is immigration rate, with relatively minor additional effects of introduction frequency and negligible effects of inoculum size. |
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Authors:
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John M Drake; Peter Baggenstos; David M Lodge |
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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: Biology letters Volume: 1 ISSN: 1744-9561 ISO Abbreviation: Biol. Lett. Publication Date: 2005 Dec |
Date Detail:
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Created Date: 2006-12-06 Completed Date: 2007-02-06 Revised Date: 2010-09-15 |
Medline Journal Info:
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Nlm Unique ID: 101247722 Medline TA: Biol Lett Country: England |
Other Details:
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Languages: eng Pagination: 480-3 Citation Subset: IM |
Affiliation:
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Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA. drake@nceas.ucsb.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Daphnia / physiology* Population Density Population Dynamics Population Growth Reproduction, Asexual* Time Factors |
| Comments/Corrections | |
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