Does predator interference cause alternative stable states in multispecies communities?
Does predator interference cause alternative stable states in multispecies communities?
复制标题
捕食者的干扰是否会导致多物种群落中出现替代的稳定状态？
DOI：
10.1016/j.tpb.2012.06.003
复制
发表时间：
2012-11-01
影响因子：
1.4
通讯作者：
van Nes, Egbert H.
中科院分区：
文献类型：
--
作者：
Feng, Jianfeng;Dakos, Vasilis;van Nes, Egbert H.
虽然这是众所周知的，简单的生态机制可能会促进稳定性，在简单的物种模型，其后果的稳定性和弹性在多物种社区在很大程度上是未知的。在这里，我们研究了捕食者干扰对随机构建的多物种捕食者-食饵群落中交替吸引子和复杂动力学的影响。我们研究了三种类型的干扰：随机干扰（“不对称”），随机干扰，但对捕食者之间的对称（“对称”），只有相同的物种之间的干扰（“同种”）。在所有情况下的捕食者干扰增加了平均数量的替代吸引，而在同一时间，它减少了振荡或混沌动力学的出现。我们的研究结果表明，捕食者干扰对群落稳定性的对比效应：一方面，它减少了动态中的周期和混沌，另一方面，捕食者干扰增加了群落在多个稳定状态之间发生关键转变的可能性。(c)2012 Elsevier Inc. All rights reserved.
Whereas it is well known that simple ecological mechanisms may promote stability in simple species models, their consequences for stability and resilience in multispecies communities are largely unexplored. Here, we studied the effect of predator interference on the occurrence of alternative attractors and complex dynamics in randomly constructed multispecies predator-prey communities. We studied three types of interference: random interference ("asymmetric"), random interference but symmetrical between pairs of predators ("symmetric"), and interference among only the same species ("conspecific"). In all case's predator interference increased the average number of alternative attractors, whereas at the same time it reduced the emergence of oscillatory or chaotic dynamics. Our findings demonstrate a contrasting effect of predator interference on the stability of a community: on the one hand it reduces cycles and chaos in the dynamics, on the other hand predator interference increases, the likelihood that communities may undergo critical transitions between multiple stable states. (c) 2012 Elsevier Inc. All rights reserved.