Seasons and Chaos in Ecosystems

3590 10 60043 2 166682 document 60043 RR-94-04.pdf application/pdf 0590aaab0d990c76db11757d46112122 MD5 15890368 2016-06-02 11:58:19 https://pure.iiasa.ac.at/id/eprint/3590/1/RR-94-04.pdf 3590 1 1 application/pdf text en public cc_by

RR-94-04.pdf

published 60044 2 166685 document 60044 lightbox.jpg image/png 914440f62315fe920454714a04fd9855 MD5 16758 2016-06-02 11:58:32 https://pure.iiasa.ac.at/id/eprint/3590/2/lightbox.jpg 3590 2 2 image/png other Thumbnails conversion from text to thumbnail_lightbox en public

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http://eprints.org/relation/isVersionOf https://pure.iiasa.ac.at/id/document/60043 http://eprints.org/relation/isVolatileVersionOf https://pure.iiasa.ac.at/id/document/60043 http://eprints.org/relation/isIndexCodesVersionOf https://pure.iiasa.ac.at/id/document/60043 archive 351 disk0/00/00/35/90 2016-01-15 02:01:38 2021-08-27 17:35:35 2016-01-15 02:01:38 monograph show 1 Rinaldi S. 7286 Seasons and Chaos in Ecosystems pub iis_mod iis_ecl iis_wat prog_dyn This research report combines two journal articles on the relationships between seasons and chaos in ecosystems. They show that the strength of the seasons (i.e., the latitude) is a key factor for understanding the strange behavior of the ecosystem, and that chaos can be present in an assembly of different communities where the rhythm of the seasons suitably interferes with the endogenous rhythms of the biological processes. The first paper by Rinaldi et al. studies a general predator-prey model describing the behavior of two interacting populations in a periodic environment. Multiple attractors and catastrophic transitions are proved to exist and the two classical routes to chaos (torn destruction and cascade of period doublings) are numerically detected. The second paper by Doveri et al. presents a seasonally perturbed plankton-fish model composed by five compartments: nutrient, algae, zoo plankton, young fish, and adult fish. The bifurcation analysis of the model supports the conclusion that the dynamics of plankton communities can easily be chaotic provided that the strength of the season is sufficiently strong. In particular, the paper shows why large year-to-year differences in young fish survival need not always be attributable to external factors like interannual weather variability. 1992 published RR-94-004. Reprinted from Theoretical Population Biology, 43(2):159-183 [1993] and Bulletin of Mathematical Biology; 55(1):15-35 [1992] RP-94-004 Reprinted from Theoretical Population Biology; 43(2):159-183 [1993] AND Bulletin of Mathematical Biology; 55(1):15-35 [1992] 10 253 public research_reprint Theoretical Population Biology 43 2 IIASA, Laxenburg, Austria 159-183 49 TRUE FALSE info:eu-repo/semantics/book