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首页> 外文期刊>Ecology letters >A bioenergetic framework for the temperature dependence of trophic interactions
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A bioenergetic framework for the temperature dependence of trophic interactions

机译：营养作用相互作用的温度依赖性的生物能框架

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Changing temperature can substantially shift ecological communities by altering the strength and stability of trophic interactions. Because many ecological rates are constrained by temperature, new approaches are required to understand how simultaneous changes in multiple rates alter the relative performance of species and their trophic interactions. We develop an energetic approach to identify the relationship between biomass fluxes and standing biomass across trophic levels. Our approach links ecological rates and trophic dynamics to measure temperature-dependent changes to the strength of trophic interactions and determine how these changes alter food web stability. It accomplishes this by using biomass as a common energetic currency and isolating three temperature-dependent processes that are common to all consumer-resource interactions: biomass accumulation of the resource, resource consumption and consumer mortality. Using this framework, we clarify when and how temperature alters consumer to resource biomass ratios, equilibrium resilience, consumer variability, extinction risk and transient vs. equilibrium dynamics. Finally, we characterise key asymmetries in species responses to temperature that produce these distinct dynamic behaviours and identify when they are likely to emerge. Overall, our framework provides a mechanistic and more unified understanding of the temperature dependence of trophic dynamics in terms of ecological rates, biomass ratios and stability.
机译：温度的变化可以通过改变营养相互作用的强度和稳定性来极大地改变生态群落。由于许多生态速率受温度限制，因此需要新方法来了解多种速率的同时变化如何改变物种的相对性能及其营养相互作用。我们开发了一种精力充沛的方法来确定生物质通量与营养级之间的固定生物量之间的关系。我们的方法将生态速率和营养动力学联系起来，以测量与温度有关的变化以及营养相互作用的强度，并确定这些变化如何改变食物网的稳定性。它通过使用生物质作为一种常见的能量货币并隔离所有消费者-资源交互作用共有的三个与温度相关的过程来实现此目的：资源的生物量积累，资源消耗和消费者死亡率。使用这个框架，我们阐明了温度何时以及如何改变消费者与资源生物量的比率，平衡弹性，消费者可变性，灭绝风险以及瞬态与平衡动态。最后，我们表征了物种对温度的响应中的关键不对称性，这些不对称性会产生这些独特的动态行为，并确定何时可能出现。总体而言，我们的框架从生态学速率，生物量比率和稳定性的角度对营养动力学对温度的依赖性提供了一种更机械，更统一的理解。

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