Spatial memory shapes density dependence in population dynamics

Riotte-Lambert, L., Benhamou, S., Bonenfant, C. and Chamaillé-Jammes, S. (2017) Spatial memory shapes density dependence in population dynamics. Proceedings of the Royal Society of London Series B: Biological Sciences, 284(1867), 20171411. (doi: 10.1098/rspb.2017.1411) (PMID:29167358)

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Abstract

Most population dynamics studies assume that individuals use space uniformly, and thus mix well spatially. In numerous species, however, individuals do not move randomly, but use spatial memory to visit renewable resource patches repeatedly. To understand the extent to which memorybased foraging movement may affect density-dependent population dynamics through its impact on competition, we developed a spatially explicit, individual-based movement model where reproduction and death are functions of foraging efficiency. We compared the dynamics of populations of with- and without-memory individuals. We showed that memory-based movement leads to a higher population size at equilibrium, to a higher depletion of the environment, to a marked discrepancy between the global (i.e. measured at the population level) and local (i.e. measured at the individual level) intensities of competition, and to a nonlinear density dependence. These results call for a deeper investigation of the impact of individual movement strategies and cognitive abilities on population dynamics.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Riotte-Lambert, Dr Louise
Authors: Riotte-Lambert, L., Benhamou, S., Bonenfant, C., and Chamaillé-Jammes, S.
College/School:College of Medical Veterinary and Life Sciences > Institute of Biodiversity Animal Health and Comparative Medicine
Journal Name:Proceedings of the Royal Society of London Series B: Biological Sciences
Publisher:The Royal Society
ISSN:0962-8452
ISSN (Online):1471-2954
Published Online:22 November 2017
Copyright Holders:Copyright © 2017 The Authors
First Published:First published in Proceedings of the Royal Society of London Series B: Biological Sciences 284(1867): 20171411
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
733901Living apart together? The common biological determinants of space use patterns in animalsJason MatthiopoulosThe Royal Society (ROYSOC)NF161261RI BIODIVERSITY ANIMAL HEALTH & COMPMED