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首页> 外文期刊>ICES Journal of Marine Science >Does functional redundancy stabilize fish communities?
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Does functional redundancy stabilize fish communities?

机译：功能冗余是否能稳定鱼类群落？

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摘要

Functional redundancy of species sharing a feeding strategy and/or maximum size has been hypothesized to contribute to increased resilience of marine fish communities (the "portfolio effect"). A consistent time-series of survey data of fish in the North Sea was used to examine if trophic functional groups or maximum length of species (L_(max)) groups with larger numbers of species had lower coefficients of variation in abundance and biomass over time than did groupings with fewer species. Results supported this hypothesis. However, the stabilizing effect of numbers of species in a group on variation in abundance or biomass could be accounted for by the Law of Large Numbers, providing no evidence that specific ecological processes or co-adaptations are necessary to produce this effect. This implies that successful conservation policies to maintain the resilience of a marine fish community could be based on strategies to maintain the number of species in functional groups, without having to know the detailed ecological interactions between the species.
机译：假设共享一种进食策略和/或最大尺寸的物种功能上的冗余有助于增加海水鱼类群落的适应力（“投资组合效应”）。使用北海鱼类调查数据的时间序列一致的方法，以检查具有大量物种的营养功能组或最大物种长度（L_（max））组是否随时间变化的丰度和生物量变异系数较低而不是较少物种的分组。结果支持了这一假设。但是，大数定律可以解释一组物种中物种数量对丰度或生物量变化的稳定作用，而没有证据表明特定的生态过程或共同适应对于产生这种作用是必需的。这意味着维持海洋鱼类群落复原力的成功保护政策可以基于维持功能组中物种数量的策略，而无需了解物种之间的详细生态相互作用。

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