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 > School of Biodiversity, One Health & Veterinary 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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