Abrupt community transitions and cyclic evolutionary dynamics in complex food webs

10697 18 13687 2 24384 document 13687 IR-13-070.pdf application/pdf 52f60a9b5b596539cf0e78d009f812ae MD5 8096723 2016-01-15 08:49:43 https://pure.iiasa.ac.at/id/eprint/10697/1/IR-13-070.pdf 10697 1 1 text en public

IR-13-070.pdf

15 14469 2 26199 document 14469 lightbox.jpg image/png f377a41b74d4639ac8d15f404e5fa056 MD5 15916 2016-01-15 09:39:07 https://pure.iiasa.ac.at/id/eprint/10697/2/lightbox.jpg 10697 2 2 image/png other Thumbnails conversion from text to thumbnail_lightbox en public

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IR-13-070.pdf

http://eprints.org/relation/isVersionOf https://pure.iiasa.ac.at/id/document/13687 http://eprints.org/relation/isVolatileVersionOf https://pure.iiasa.ac.at/id/document/13687 http://eprints.org/relation/isCoversheetVersionOf https://pure.iiasa.ac.at/id/document/13687 archive 351 disk0/00/01/06/97 2016-01-15 08:49:42 2021-08-27 17:23:46 2016-01-15 08:49:42 monograph show 3 Takahashi D. Brännström Å. 8085 Mazzucco R. 1843 Yamauchi A. Dieckmann U. 1668 0000-0001-7089-0393 Abrupt community transitions and cyclic evolutionary dynamics in complex food webs pub iis_ecl prog_eep individual-based model; extinction cascade; trophic-level evolution; consumer collapse Understanding the emergence and maintenance of biodiversity ranks among the most fundamental challenges in evolutionary ecology. While processes of community assembly have frequently been analyzed from an ecological perspective, their evolutionary dimensions have so far received less attention. To elucidate the eco-evolutionary processes underlying the long-term build-up and potential collapse of community diversity, here we develop and examine an individual-based model describing coevolutionary dynamics driven by trophic interactions and interference competition, of a pair of quantitative traits determining predator and prey niches. Our results demonstrate the (1) emergence of communities with 30 multiple trophic levels, shown here for the first time for stochastic models with linear functional responses, and A(2) intermittent and cyclic evolutionary transitions between two alternative community states. In particular, our results indicate that the interplay of ecological and evolutionary dynamics often results in extinction cascades that remove the entire trophic level of consumers from a community. Finally, we show the (3) robustness of our results under variations of model assumptions, underscoring that processes of consumer collapse and subsequent rebound could be important elements of understanding biodiversity dynamics in natural communities. 2013 published IR-13-070 IR-13-070 39 201 66 public interim_report IIASA, Laxenburg, Austria 39 FALSE info:eu-repo/semantics/book