Directed movement changes coexistence outcomes in heterogeneous environments
| Autor: | Alan Hastings, Bo Zhang, Wei-Ming Ni, Kevin M. Collins, Rossana Signorelli, Lu Zhai, Donald L. DeAngelis, Zhiyuan Fu, Yuan Lou, King-Yeung Lam |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
0303 health sciences Ecology Computer science Component (thermodynamics) Movement (music) Ecology (disciplines) media_common.quotation_subject Population Dynamics Models Biological 010603 evolutionary biology 01 natural sciences Article Competition (biology) Nematode worm 03 medical and health sciences Animals Biological system Animal Distribution Ecosystem Ecology Evolution Behavior and Systematics 030304 developmental biology media_common |
| Zdroj: | Ecol Lett |
| ISSN: | 1461-0248 1461-023X |
| DOI: | 10.1111/ele.13925 |
| Popis: | Understanding mechanisms of coexistence is a central topic in ecology. Mathematical analysis of models of competition between two identical species moving at different rates of symmetric diffusion in heterogeneous environments show that the slower mover excludes the faster one. The models have not been tested empirically and lack inclusions of a component of directed movement toward favourable areas. To address these gaps, we extended previous theory by explicitly including exploitable resource dynamics and directed movement. We tested the mathematical results experimentally using laboratory populations of the nematode worm, Caenorhabditis elegans. Our results not only support the previous theory that the species diffusing at a slower rate prevails in heterogeneous environments but also reveal that moderate levels of a directed movement component on top of the diffusive movement allow species to coexist. Our results broaden the theory of species coexistence in heterogeneous space and provide empirical confirmation of the mathematical predictions. |
| Databáze: | OpenAIRE |
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