Trait-mediated processes and per capita contributions to ecosystem functioning depend on conspecific density and climate conditions
Trait-mediated processes and per capita contributions to ecosystem functioning depend on conspecific density and climate conditions
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DOI：
10.1038/s43247-024-01237-6
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发表时间：
2024-02-12
影响因子：
7.9
通讯作者：
Godbold，Jasmin A.
中科院分区：
文献类型：
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作者：
Sanders，Trystan;Solan，Martin;Godbold，Jasmin A.
环境变化的生态后果高度依赖于幸存群落的功能贡献，但通常用于预测生态系统未来的分类描述符未能捕获依赖于环境的响应变异性。在这里，我们表明了一系列沉积海洋无脊椎动物的种内变异性是由同种密度和/或气候条件的变化所调节的。虽然这些性状介导的变化导致了生态系统特性的改变，但我们发现，个体对生态系统功能的贡献并不一定是相加的，而是资本绩效变化的结果。我们的研究结果还表明，物种内性状变异比物种间性状变异对功能的影响更大。因此，从平均性状值对可能的功能结果的预测不太可能是稳健的，强调需要解释种内变异性如何以及何时导致依赖于环境的群落对变化的反应。
The ecological consequences of environmental change are highly dependent on the functional contributions of the surviving community, but categorical descriptors commonly used to project ecosystem futures fail to capture context dependent response variability. Here, we show that intraspecific variability for a range of sediment-dwelling marine invertebrates is moderated by changes in the density of conspecifics and/or climatic conditions. Although these trait-mediated changes result in modifications to ecosystem properties, we find that the contributions of individuals to functioning are not necessarily additive but, instead, are a result of alterations toper capitaperformance. Our findings also indicate that trait variation within species can exert a greater influence on functioning than that of trait variation between species. Hence, projections of likely functional outcomes that scale from mean trait values are unlikely to be robust, highlighting a need to account for how and when intraspecific variability results in context-dependent community responses to change.