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首页> 美国卫生研究院文献>Philosophical Transactions of the Royal Society B: Biological Sciences >The more things change the more they stay the same? When is trait variability important for stability of ecosystem function in a changing environment
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The more things change the more they stay the same? When is trait variability important for stability of ecosystem function in a changing environment

机译：变化越多它们保持不变的越多？在变化的环境中何时性状变异对于生态系统功能的稳定性重要？

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The importance of intraspecific trait variability for community dynamics and ecosystem functioning has been underappreciated. There are theoretical reasons for predicting that species that differ in intraspecific trait variability will also differ in their effects on ecosystem functioning, particularly in variable environments. We discuss whether species with greater trait variability are likely to exhibit greater temporal stability in their population dynamics, and under which conditions this might lead to stability in ecosystem functioning. Resolving this requires us to consider several questions. First, are species with high levels of variation for one trait equally variable in others? In particular, is variability in response and effects traits typically correlated? Second, what is the relative contribution of local adaptation and phenotypic plasticity to trait variability? If local adaptation dominates, then stability in function requires one of two conditions: (i) individuals of appropriate phenotypes present in the environment at high enough frequencies to allow for populations to respond rapidly to the changing environment, and (ii) high levels of dispersal and gene flow. While we currently lack sufficient information on the causes and distribution of variability in functional traits, filling in these key data gaps should increase our ability to predict how changing biodiversity will alter ecosystem functioning.
机译：种内性状变异对于社区动态和生态系统功能的重要性没有得到充分认识。有理论上的理由预测，种内性状变异性不同的物种对生态系统功能的影响也将有所不同，尤其是在变化的环境中。我们讨论具有较大性状变异性的物种是否可能在其种群动态中表现出更大的时间稳定性，以及在何种条件下这可能导致生态系统功能的稳定性。解决这个问题需要我们考虑几个问题。首先，一个性状具有较高变异水平的物种在其他特征中是否同样具有可变性？特别是，反应和效果特质的变异性通常是否相关？其次，局部适应和表型可塑性对性状变异的相对贡献是什么？如果占主导地位的是局部适应，那么功能的稳定性就需要满足以下两个条件之一：（i）在环境中以足够高的频率出现适当表型的个体，以允许种群对变化的环境做出快速反应，以及（ii）高度分散和基因流。尽管我们目前缺乏有关功能性状特征变异性的原因和分布的足够信息，但填补这些关键数据空白应能提高我们预测生物多样性变化将如何改变生态系统功能的能力。

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