The resident strikes back: invader-induced switching of resident attractor.
The resident strikes back: invader-induced switching of resident attractor.
复制标题
居民反击：入侵者引起的居民吸引子转换。
DOI：
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发表时间：
2001
影响因子：
2
通讯作者：
Odo Diekmann
中科院分区：
文献类型：
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作者：
S. Mylius;Odo Diekmann
本文的目的是双重的：（a）通过例子，我们阐明了入侵者引起的开关在居民吸引的现象;（B）我们详细揭示了如何共振和相位有强烈的影响时，semelparous生物（如，例如太平洋鲑鱼）具有不同的生命周期长度的竞争在一个自我诱导的周期性波动的环境。我们分析了一个简单的一年生和两年生之间的竞争模型，重点是一年生种群在隔离收敛到一个两个周期的情况。适时的两年生突变体比一年生居民更有效地采样周期性变化的环境。即使它们不如居民，也可以成功入侵，因为它们的生存能力和/或繁殖力较低。如果入侵者比居民差得多，成功的入侵可以导致共振介导的共存。值得注意的是，对于那些不那么劣于原住民的突变体，通过突变体策略成功入侵后，前入侵者将不可避免地灭绝，同时原住民将重新建立。入侵者的驱逐是由入侵引起的相移或吸引子开关引起的。我们称这种现象为“居民反击”，并说居民战略是入侵的，但不可战胜的。在居民反击后，其他变种人可以再次成功入侵。在较长的时间尺度上，这可能会导致最终劣策略的间歇性发生。结果表明，即使在一个确定性的设置，成功的入侵并不一定会导致建立和相互入侵并不总是足够的共存。
The aim of this paper is two-fold: (a) by way of example, we elucidate the phenomenon of invader-induced switches in a resident attractor; (b) we expose in detail how resonance and phase have a strong impact when semelparous organisms (as, e.g. Pacific salmon) with different life-cycle lengths compete in a self-induced periodically fluctuating environment. We analyse a simple model for the competition between annuals and biennials, focusing on the situation that the annual population in isolation converges to a two-cycle. Well-timed biennial mutants sample the periodically varying environment more efficiently than the annual resident. They can invade successfully even when they are inferior to the resident, in the sense that they have lower viability and/or fertility. Successful invasion can lead to resonance-mediated coexistence if the invader is rather inferior to the resident. Remarkably, for mutants that are less inferior to the resident, successful invasion by a mutant strategy will inevitably be followed by the extinction of the former invader and concurrent re-establishment of the resident. The expulsion of the invader is brought about by an invasion-induced phase shift or attractor switch. We call this phenomenon "the resident strikes back" and say that the resident strategy is invasible, yet invincible. After the resident has struck back, other mutants can successfully invade again. On a longer time-scale, this might lead to an intermittent occurrence of ultimately inferior strategies. The results show that even in a deterministic setting, successful invasion does not necessarily lead to establishment and that mutual invasibility is not always sufficient for coexistence.