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  Local and spatial dynamics of a host-parasitoid system in a field experiment

Rauch, G., & Weisser, W. W. (2007). Local and spatial dynamics of a host-parasitoid system in a field experiment. Basic and Applied Ecology, 8(1), 89-95. doi:10.1016/j.baae.2006.03.007.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-D7EF-0 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-D7F0-A
Genre: Journal Article

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rauch_2007.pdf (Publisher version), 179KB
 
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 Creators:
Rauch, Gisep1, Author              
Weisser, Wolfgang W., Author
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1Department Evolutionary Ecology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_1445634              

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Free keywords: extinction; distance dependence; colonisation rate; Metopeurum fuscoviride; Lysiphlebus hirticornis
 Abstract: Local extinction and colonisation rates are key factors in host-parasitoid metapopulation theory, but experimental evidence from the field is scarce. We studied the host-parasitoid system consisting of the aphid Metopeurum fuscoviride and its specialist parasitoid Lysiphlebus hirticornis. This system is characterised by a patchy distribution of the host plants (Tanacetum vulgare) and by frequent extinctions of local aphid populations. In a first field experiment, we found that the presence of the parasitoid increases the likelihood of extinction of local host populations (= all aphids living on one plant). In a second field experiment, we manipulated the distance between local host populations. Parasitoid colonisation rate strongly decreased with increasing distance between local. host populations. Thus, our results show the importance of parasitoids for local host populations extinction and of distance between local host populations for parasitoid colonisation rate, suggesting the importance of spatial processes for host-parasitoid systems in the field.

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Language(s): eng - English
 Dates: 2007
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: eDoc: 313423
DOI: 10.1016/j.baae.2006.03.007
Other: S 38674
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Title: Basic and Applied Ecology
Source Genre: Journal
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Pages: - Volume / Issue: 8 (1) Sequence Number: - Start / End Page: 89 - 95 Identifier: ISSN: 1439-1791