Testing Bergmann's rule in marine copepods
Testing Bergmann's rule in marine copepods
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DOI：
10.1111/ecog.05545
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发表时间：
2021-08-10
期刊：
影响因子：
5.9
通讯作者：
Richardson, Anthony J.
中科院分区：
文献类型：
--
作者：
Campbell, Max D.;Schoeman, David S.;Richardson, Anthony J.
宏观生态关系提供了对生态系统管理规则的见解。伯格曼规则认为，同一分支的成员在较冷的温度下体型更大。温度是否驱动这种关系存在争议，因为其他几个潜在的驱动因素与温度有关。我们对海洋桡足类动物（97 830 个样本，388 个分类群）进行了近乎全球的比较分析，以测试伯格曼规则，同时考虑其他潜在的驱动因素。我们发现温度比纬度或氧气更能预测体型，这支持了伯格曼的规则，在整个温度范围（-1.7 至 30oC）内，体型减小了 43.9%。在食物供应范围内，体型也减少了 26.9%。我们的结果为伯格曼的桡足类规则提供了强有力的支持，但强调了其他驱动因素在改变这种模式方面的重要性。随着世界变暖，较小的桡足类物种可能会成为“赢家”，从而可能降低渔业产量和碳固存率。
Macroecological relationships provide insights into rules that govern ecological systems. Bergmann's rule posits that members of the same clade are larger at colder temperatures. Whether temperature drives this relationship is debated because several other potential drivers covary with temperature. We conducted a near-global comparative analysis on marine copepods (97 830 samples, 388 taxa) to test Bergmann's rule, considering other potential drivers. Supporting Bergmann's rule, we found temperature better predicted size than did latitude or oxygen, with body size decreasing by 43.9% across the temperature range (-1.7 to 30oC). Body size also decreased by 26.9% across the range in food availability. Our results provide strong support for Bergman's rule in copepods, but emphasises the importance of other drivers in modifying this pattern. As the world warms, smaller copepod species are likely to emerge as 'winners', potentially reducing rates of fisheries production and carbon sequestration.