Rapid Anthropocene realignment of allometric scaling rules,Ecology Letters

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Rapid Anthropocene realignment of allometric scaling rules
Ecology Letters ( IF 7.6 ) Pub Date : 2021-05-01 , DOI: 10.1111/ele.13743
Luca Santini _{1,

2} , Nick J. B. Isaac ₃

Affiliation

The negative relationship between body size and population density in mammals is often interpreted as resulting from energetic constraints. In a global change scenario, however, this relationship might be expected to change, given the size-dependent nature of anthropogenic pressures and vulnerability to extinction. Here we test whether the size-density relationship (SDR) in mammals has changed over the last 50 years. We show that the relationship has shifted down and became shallower, corresponding to a decline in population density of 31–73%, for the largest and smallest mammals, respectively. However, the SDRs became steeper in some groups (e.g. carnivores) and shallower in others (e.g. herbivores). The Anthropocene reorganisation of biotic systems is apparent in macroecological relationships, reinforcing the notion that biodiversity pattens are contingent upon conditions at the time of investigation. We call for an increased attention to the role of global change on macroecological inferences.

中文翻译：

异速生长缩放规则的快速人类世重新调整

哺乳动物的体型和种群密度之间的负相关关系通常被解释为能量限制的结果。然而，在全球变化情景中，鉴于人为压力的大小依赖性质和濒临灭绝的脆弱性，这种关系可能会发生变化。在这里，我们测试哺乳动物的大小密度关系 (SDR) 在过去 50 年中是否发生了变化。我们表明，这种关系已经向下移动并变得更浅，对应于最大和最小哺乳动物的种群密度分别下降了 31-73%。然而，SDR 在某些群体（例如食肉动物）中变得更陡峭，而在其他群体（例如食草动物）中变得更浅。生物系统的人类世重组在宏观生态关系中很明显，强化生物多样性模式视调查时的条件而定的观念。我们呼吁更多地关注全球变化对宏观生态推论的作用。

更新日期：2021-06-13

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