The paradox of enrichment in an adaptive world
The paradox of enrichment in an adaptive world
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DOI：
10.1098/rspb.2008.0889
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发表时间：
2008-11-22
影响因子：
4.7
通讯作者：
Nishimura, Kinya
中科院分区：
文献类型：
--
作者：
Mougi, Akihiko;Nishimura, Kinya
矛盾的是，富集会破坏捕食者-猎物食物链的稳定。虽然适应性动力学可以极大地影响相互作用系统的稳定性，但很少有理论研究考察交互作用相关性状的适应性动力学对解决丰富悖论的可能性的影响。我们考虑了一个捕食者和两个被捕食者在一个捕食者-两个食饵系统中的攻击和防御特征的演化，在这个系统中捕食者实行最优的食物使用。结果表明，仅靠最佳觅食不能消除不稳定和丰富的模式，但捕食者或猎物的特征进化可以将这种模式改变为稳定的模式，这意味着可能解决了丰富的悖论。此外，所有物种的性状进化都可以扩大稳定化的参数范围。重要的是，快速进化可以稳定这一体系，但在丰富的情况下会削弱其稳定性。
Paradoxically, enrichment can destabilize a predator-prey food web. While adaptive dynamics can greatly influence the stability of interaction systems, few theoretical studies have examined the effect of the adaptive dynamics of interaction-related traits on the possibility of resolution of the paradox of enrichment. We consider the evolution of attack and defence traits of a predator and two prey species in a one predator-two prey system in which the predator practises optimal diet use. The results showed that optimal foraging alone cannot eliminate a pattern of destabilization with enrichment, but trait evolution of the predator or prey can change the pattern to one of stabilization, implying a possible resolution of the paradox of enrichment. Furthermore, trait evolution in all species can broaden the parameter range of stabilization. Importantly, rapid evolution can stabilize this system, but weaken its stability in the face of enrichment.