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The functional response predicts the effect of resource distribution on the optimal movement rate of consumers
The functional response predicts the effect of resource distribution on the optimal movement rate of consumers
- Source :
- Ecology Letters, Ecology Letters, 2014, 17 (12), pp.1570-1579. ⟨10.1111/ele.12379⟩, Ecology Letters, Wiley, 2014, 17 (12), pp.1570-1579. ⟨10.1111/ele.12379⟩, Ecology Letters 12 (17), 1570–1579. (2014)
- Publication Year :
- 2014
- Publisher :
- HAL CCSD, 2014.
-
Abstract
- International audience; Understanding how often individuals should move when foraging over patchy habitats is a central question in ecology. By combining optimality and functional response theories, we show analytically how the optimal movement rate varies with the average resource level (enrichment) and resource distribution (patch heterogeneity). We find that the type of functional response predicts the effect of enrichment in homogeneous habitats: enrichment should decrease movement for decelerating functional responses, but increase movement for accelerating responses. An intermediate resource level thus maximises movement for type-III responses. Counterintuitively, greater movement costs favour an increase in movement. In heterogeneous habitats predictions further depend on how enrichment alters the variance of resource distribution. Greater patch variance always increases the optimal rate of movement, except for type-IV functional responses. While the functional response is well established as a fundamental determinant of consumer–resource dynamics, our results indicate its importance extends to the understanding of individual movement strategies.
- Subjects :
- 0106 biological sciences
enrichment
Foraging
Resource distribution
Functional response
Marginal value theorem
Biology
Models, Biological
010603 evolutionary biology
01 natural sciences
Keywords: Behaviour
modelling
03 medical and health sciences
Animals
behaviour
dispersal
Marginal Value Theorem
patchy habitats
spatial heterogeneity
Ecosystem
Ecology, Evolution, Behavior and Systematics
030304 developmental biology
2. Zero hunger
[SDV.EE]Life Sciences [q-bio]/Ecology, environment
0303 health sciences
Movement (music)
Ecology
Variance (accounting)
15. Life on land
Spatial heterogeneity
Biological dispersal
Locomotion
Subjects
Details
- Language :
- English
- ISSN :
- 1461023X and 14610248
- Database :
- OpenAIRE
- Journal :
- Ecology Letters, Ecology Letters, 2014, 17 (12), pp.1570-1579. ⟨10.1111/ele.12379⟩, Ecology Letters, Wiley, 2014, 17 (12), pp.1570-1579. ⟨10.1111/ele.12379⟩, Ecology Letters 12 (17), 1570–1579. (2014)
- Accession number :
- edsair.doi.dedup.....489b06f6392b7b7b314abcb1eca65453
- Full Text :
- https://doi.org/10.1111/ele.12379⟩