Warming-induced reductions in body size are greater in aquatic than terrestrial species
Warming-induced reductions in body size are greater in aquatic than terrestrial species
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DOI：
10.1073/pnas.1210460109
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发表时间：
2012-11-20
影响因子：
11.1
通讯作者：
Atkinson, David
中科院分区：
文献类型：
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作者：
Forster, Jack;Hirst, Andrew G.;Atkinson, David
大多数变温生物在温暖的条件下饲养时，其成熟时的体型较小。这种表型可塑性反应被称为“温度大小规则”（TSR），是生物学中分类学上最普遍的模式之一。然而，TSR 仍然是一个长期存在的生命史谜题，尚未找到主要驱动因素。我们认为氧气供应在解释变热温度-大小响应的幅度方面起着核心作用。考虑到与空气相比，氧气供应量要低得多，并且需要付出更大的努力来增加水的吸收，我们预测水生生物的 TSR，特别是表面积与体重比较低的较大物种，将比陆生生物更强。我们对 169 种陆地、淡水和海洋物种的对照实验中的 1,890 种体重对温度的反应进行了元分析。这表明水生物种的温度-大小响应强度大于陆生物种。在干质量接近 100 毫克的动物物种中，水生生物的温度-大小响应比陆生生物大 10 倍（-5.0% 摄氏度-1 与 -0.5% 摄氏度-1）。此外，虽然尺寸响应很小（
Most ectothermic organisms mature at smaller body sizes when reared in warmer conditions. This phenotypically plastic response, known as the "temperature-size rule" (TSR), is one of the most taxonomically widespread patterns in biology. However, the TSR remains a longstanding life-history puzzle for which no dominant driver has been found. We propose that oxygen supply plays a central role in explaining the magnitude of ectothermic temperature-size responses. Given the much lower oxygen availability and greater effort required to increase uptake in water vs. air, we predict that the TSR in aquatic organisms, especially larger species with lower surface area-body mass ratios, will be stronger than in terrestrial organisms. We performed ameta-analysis of 1,890 body mass responses to temperature in controlled experiments on 169 terrestrial, freshwater, and marine species. This reveals that the strength of the temperature-size response is greater in aquatic than terrestrial species. In animal species of similar to 100 mg dry mass, the temperature-size response of aquatic organisms is 10 times greater than in terrestrial organisms (-5.0% degrees C-1 vs. -0.5% degrees C-1). Moreover, although the size response of small (