Chaotic population dynamics and biology of the top-predator
Chaotic population dynamics and biology of the top-predator
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DOI：
10.1016/j.chaos.2003.12.065
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发表时间：
2004-09
影响因子：
7.8
通讯作者：
V. Rai;R. K. Upadhyay
中科院分区：
文献类型：
--
作者：
V. Rai;R. K. Upadhyay
我们研究食物链的动态如何取决于顶级捕食者的生物学。我们考虑两种典型的食物链，分别是专门型和通才型顶级捕食者。两种类型的食物链都表现出相同类型的混乱行为，短期反复出现的混乱；但产生机制却截然不同。有专门的顶级捕食者的食物链是由外生随机因素决定的。相反，那些具有通才型顶级捕食者的动态是由系统参数的确定性变化控制的。该研究还表明，强烈的混沌将是罕见的。
We study how the dynamics of a food chain depends on the biology of the top-predator. We consider two model food chains with specialist and generalist top-predators. Both types of food chains display same type of chaotic behavior, short-term recurrent chaos; but the generating mechanisms are drastically different. Food chains with specialist top-predators are dictated by exogenous stochastic factors. On the contrary, the dynamics of those with the generalist top-predator is governed by deterministic changes in system parameters. The study also suggests that robust chaos would be a rarity.