A metabolic perspective on competition and body size reductions with warming.
A metabolic perspective on competition and body size reductions with warming.
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DOI：
10.1111/1365-2656.12064
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
D. Reuman;R. Holt;G. Yvon‐Durocher
中科院分区：
文献类型：
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作者：
D. Reuman;R. Holt;G. Yvon‐Durocher
温度是生态过程和模式的关键驱动因素。温度对生态群落的影响不仅包括其对个体生理的直接影响，还包括这些影响如何在竞争等其他过程中发挥作用。显然，温度对竞争结果的特殊或难以预测的影响在文献中得到了很好的体现。对温度的生理影响如何通过群落动态过滤来决定结果的一般理论理解是有限的。在了解温度对物种生理和种群参数影响的基础上，提出了一个预测温度对物种间竞争影响的理论框架。该方法有助于将形式资源竞争理论与代谢生态学和生理生态学相统一。浮游植物和许多其他变温动物在较高的温度下体型较小。这在实验中已经被观察到，跨越地理梯度，并作为气候变暖的变化，但还没有从竞争的角度来解释。作为一个案例研究，我们将我们的理论框架应用于不同大小的浮游植物之间的营养竞争。基于这一分析，我们假设，较小的浮游植物在较高温度下的流行至少部分是由于较小的细胞在较高温度下就营养吸收和生长而言具有突出的竞争优势。我们研究了扩展该方法的范围，以了解不同规模的变温动物之间的资源竞争。
Temperature is a key driver of ecological processes and patterns. The ramifications of temperature for ecological communities include not only its direct effects on the physiology of individuals, but also how these effects play out in the context of other processes such as competition. Apparently idiosyncratic or difficult to predict effects of temperature on competitive outcomes are well represented in the literature. General theoretical understanding of how physiological influences of temperature filter through community dynamics to determine outcomes is limited. We present a theoretical framework for predicting the effects of temperature on competition among species, based on understanding the effects of temperature on the physiological and population parameters of the species. The approach helps unify formal resource competition theory with metabolic and physiological ecology. Phytoplankton and many other ectotherms are smaller at higher temperatures. This has been observed experimentally, across geographical gradients, and as change accompanying climate warming, but it has not been explained in terms of competition. As a case study, we apply our theoretical framework to competition for nutrients among differently sized phytoplankton. Based on this analysis, we hypothesize that the prevalence of smaller phytoplankton at higher temperatures is at least partly due to an accentuated competitive advantage of smaller cells at higher temperatures with respect to nutrient uptake and growth. We examine the scope for extending the approach to understand resource competition, generally, among ectotherms of different sizes.