| Abstract: | Interactions between two populations are often defined by their interaction outcomes; that is, the positive, neutral, or negative effects of species on one another. Yet, signs of outcomes are not absolute, but vary with the biotic and abiotic contexts of interactions. Here, we develop a general theory for transitions between outcomes based on consumer-resource (C-R) interactions in which one or both species exploit the other as a resource. Simple models of C-R interactions revealed multiple equilibria, including one for species coexistence and others for extinction of one or both species, indicating that species densities alone could determine the fate of interactions. All possible outcomes (+ +), (+ -), (- -), (+ 0), (- 0), (0 0) of species coexistence emerged merely through changes in parameter values of C-R interactions, indicating that variation in C-R interactions resulting from biotic and abiotic conditions could determine shifts in outcomes. These results suggest that C-R interactions can provide a broad mechanism for understanding context- and density-dependent transitions between interaction outcomes. |
| Genre: | Article |
| ProdID: | 70003620 |
| Citation Author: | Holland, J. Nathaniel; DeAngelis, Donald L. |
| Citation Contributing Office: | Southeast Ecological Science Center |
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| Citation End Page: | 1366 |
| Citation Issue: | 12 |
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| Citation Language: | English |
| Citation Larger Work Title: | Ecology Letters |
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| Citation Phsyical Description: | 10 p. |
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| Citation Publisher: | Wiley |
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| Citation Search Results Text: | Consumer-resource theory predicts dynamic transitions between outcomes of interspecific interactions; 2009; Article; Journal; Ecology Letters; Holland, J. Nathaniel; DeAngelis, Donald L. |
| Citation Start Page: | 1357 |
| Citation Volume: | 12 |
| Citation Year: | 2009 |
| Type: | citation/reference |
| Text: | Consumer-resource theory predicts dynamic transitions between outcomes of interspecific interactions; 2009; Article; Journal; Ecology Letters; Holland, J. Nathaniel; DeAngelis, Donald L. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (INDEX PAGE): | http://onlinelibrary.wiley.com/doi/10.1111/j.1461-0248.2009.01390.x/abstract |
| Date Other: | Tue, 12 Jul 2011 00:00 -0500 |
| Publisher: | Wiley |
