Donald Bren School of Environmental Science and Management, University of California, Santa Barbara, Santa Barbara, CA 93106-5131, USA.
Ecol Lett. 2010 Mar;13(3):360-71. doi: 10.1111/j.1461-0248.2009.01427.x.
Several recent advances in coexistence theory emphasize the importance of space and dispersal, but focus on average dispersal rates and require spatial heterogeneity, spatio-temporal variability or dispersal-competition tradeoffs to allow coexistence. We analyse a model with stochastic juvenile dispersal (driven by turbulent flow in the coastal ocean) and show that a low-productivity species can coexist with a high-productivity species by having dispersal patterns sufficiently uncorrelated from those of its competitor, even though, on average, dispersal statistics are identical and subsequent demography and competition is spatially homogeneous. This produces a spatial storage effect, with an ephemeral partitioning of a 'spatial niche', and is the first demonstration of a physical mechanism for a pure spatiotemporal environmental response. 'Turbulent coexistence' is widely applicable to marine species with pelagic larval dispersal and relatively sessile adult life stages (and perhaps some wind-dispersed species) and complements other spatial and temporal storage effects previously documented for such species.
近年来，共存理论的一些进展强调了空间和扩散的重要性，但侧重于平均扩散率，并需要空间异质性、时空可变性或扩散-竞争权衡，以允许共存。我们分析了一个具有随机幼年扩散（由沿海海洋的湍流传导驱动）的模型，并表明，即使扩散统计数据相同，且随后的种群动态和竞争在空间上是均匀的，扩散模式与竞争者的扩散模式足够不相关，低生产力物种也可以与高生产力物种共存。这产生了一种空间存储效应，即“空间生态位”的短暂划分，这是对纯时空环境响应的物理机制的首次证明。“湍流传存”广泛适用于具有浮游幼体扩散和相对固着的成体生活阶段的海洋物种（也许还有一些随风扩散的物种），并补充了以前为这些物种记录的其他时空存储效应。
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