dorsal/arxiv
View SchemaEvolutionary tradeoff and equilibrium in an aquatic predator-prey system
| Authors | Laura E. Jones, Stephen P. Ellner |
|---|---|
| Categories | |
| ArXiv ID | q-bio/0311025 |
| URL | https://arxiv.org/abs/q-bio/0311025 |
| DOI | 10.1016/j.bulm.2004.02.006 |
| Journal | Bulletin of Mathematical Biology (66) 1547-1573 (2004) |
Abstract
Due to the conventional distinction between ecological (rapid) and evolutionary (slow)timescales, ecological and population models to date have typically ignored the effects of evolution. Yet the potential for rapid evolutionary change has been recently established and may be critical to understanding how populations adapt to changing environments. In this paper we examine the relationship between ecological and evolutionary dynamics, focusing on a well-studied experimental aquatic predator-prey system (Fussmann et al. 2000; Shertzer et al. 2002; Yoshida et al. 2003). Major properties of predator-prey cycles in this system are determined by ongoing evolutionary dynamics in the prey population. Under some conditions, however, the populations tend to apparently stable steady-state densities. These are the subject of the present paper. We examine a previously developed model for the system, to determine how evolution shapes properties of the equilibria, in particular the number and identity of coexisting prey genotypes. We then apply these results to explore how evolutionary dynamics can shape the responses of the system to "management": externally imposed alterations in conditions. Specifically, we compare the behavior of the system including evolutionary dynamics, with predictions that would be made if the potential for rapid evolutionary change is negelected. Finally, we posit some simple experiments to verify our prediction that evolution can have significant qualitative effects on observed population-level responses to changing conditions.
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"abstract": "Due to the conventional distinction between ecological (rapid) and\nevolutionary (slow)timescales, ecological and population models to date have\ntypically ignored the effects of evolution. Yet the potential for rapid\nevolutionary change has been recently established and may be critical to\nunderstanding how populations adapt to changing environments. In this paper we\nexamine the relationship between ecological and evolutionary dynamics, focusing\non a well-studied experimental aquatic predator-prey system (Fussmann et al.\n2000; Shertzer et al. 2002; Yoshida et al. 2003). Major properties of\npredator-prey cycles in this system are determined by ongoing evolutionary\ndynamics in the prey population. Under some conditions, however, the\npopulations tend to apparently stable steady-state densities. These are the\nsubject of the present paper. We examine a previously developed model for the\nsystem, to determine how evolution shapes properties of the equilibria, in\nparticular the number and identity of coexisting prey genotypes. We then apply\nthese results to explore how evolutionary dynamics can shape the responses of\nthe system to \"management\": externally imposed alterations in conditions.\nSpecifically, we compare the behavior of the system including evolutionary\ndynamics, with predictions that would be made if the potential for rapid\nevolutionary change is negelected. Finally, we posit some simple experiments to\nverify our prediction that evolution can have significant qualitative effects\non observed population-level responses to changing conditions.",
"arxiv_id": "q-bio/0311025",
"authors": [
"Laura E. Jones",
"Stephen P. Ellner"
],
"categories": [
"q-bio.PE",
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],
"doi": "10.1016/j.bulm.2004.02.006",
"journal_ref": "Bulletin of Mathematical Biology (66) 1547-1573 (2004)",
"title": "Evolutionary tradeoff and equilibrium in an aquatic predator-prey system",
"url": "https://arxiv.org/abs/q-bio/0311025"
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