Population dynamical consequences of gregariousness in a size-structured consumer–resource interaction

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Fältnamn	Indikatorer	Metadata
000		02711naa a2200277 4500
001		oai:DiVA.org:umu-12193
003		SwePub
008		070326s2007 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-121932 URI
024	7	a https://doi.org/10.1016/j.jtbi.2006.12.0112 DOI
040		a (SwePub)umu
041		a engb eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a art2 swepub-publicationtype
100	1	a van Kooten, Tobiasu Umeå universitet,Institutionen för ekologi, miljö och geovetenskap4 aut0 (Swepub:umu)tova0001
245	1 0	a Population dynamical consequences of gregariousness in a size-structured consumer–resource interaction
264	1	b Elsevier BV,c 2007
338		a print2 rdacarrier
520		a Many animal species live in groups. Group living may increase exploitation competition within the group, and variation among groups in intra-group competition intensity could induce life-history variability among groups. Models of physiologically structured populations generally predict single generation cycles, driven by exploitation competition within and between generations. We expect that life-history variability and habitat heterogeneity induced by group living may affect such competition-driven population dynamics. In this study, we vary the gregariousness (the tendency to aggregate in groups) of a size-structured consumer population in a spatially explicit environment. The consumer has limited mobility, and moves according to a probabilistic movement process. We study the effects on the population dynamics, as mediated through the resource and the life-history of the consumer. We find that high gregariousness leads to large spatial resource variation, and highly variable individual life-history, resulting in highly stochastic population dynamics. At reduced gregariousness, life-history of consumers synchronizes, habitat heterogeneity is reduced, and single generation cycles appear. We expect this pattern to occur for any group living organism with limited mobility. Our results indicate that constraints set by population dynamical feedback may be an important aspect in understanding group living in nature.
700	1	a Persson, Lennartu Umeå universitet,Institutionen för ekologi, miljö och geovetenskap4 aut0 (Swepub:umu)lepe0001
700	1	a de Roos, André M.4 aut
710	2	a Umeå universitetb Institutionen för ekologi, miljö och geovetenskap4 org
773	0	t Journal of Theoretical Biologyd : Elsevier BVg 254:4, s. 763-774q 254:4<763-774x 0022-5193
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-12193
856	4 8	u https://doi.org/10.1016/j.jtbi.2006.12.011

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Av författaren/redakt...: van Kooten, Tobi ...; Persson, Lennart; de Roos, André M ...

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