Diversity of ageing across the tree of life.

Diversity of ageing across the tree of life.
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DOI:
10.1038/nature12789
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发表时间:
2014-01-09
期刊:
影响因子:
64.8
通讯作者:
--
中科院分区:
综合性期刊1区
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--
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进化推动着人口统计学,也被人口统计学所推动。一个基因型塑造了其表型在环境中的死亡率和生育率的年龄模式;这两种模式反过来又决定了该基因型在该环境中的适应性。因此,为了了解衰老的演变,需要在生命之树上比较物种的死亡率和繁殖率的年龄模式。然而,很少有研究这样做,只有有限的分类群范围。在这里,我们对比了11种哺乳动物,12种其他脊椎动物,10种无脊椎动物,12种维管植物和一种绿色植物的标准化模式。虽然有人预测,进化应不可避免地导致死亡率增加和生育率下降,随着年龄的增长后成熟,有很大的变化,这些物种,包括增加,恒定,减少,驼峰和弯曲的轨迹为长寿和短命的物种。这种多样性要求理论家对老龄化的进化发展更广泛的观点,并要求生物学家研究更多物种的人口统计学。
Evolution drives, and is driven by, demography. A genotype moulds its phenotype’s age patterns of mortality and fertility in an environment; these two patterns in turn determine the genotype’s fitness in that environment. Hence, to understand the evolution of ageing, age patterns of mortality and reproduction need to be compared for species across the tree of life. However, few studies have done so and only for a limited range of taxa. Here we contrast standardized patterns over age for 11 mammals, 12 other vertebrates, 10 invertebrates, 12 vascular plants and a green alga. Although it has been predicted that evolution should inevitably lead to increasing mortality and declining fertility with age after maturity, there is great variation among these species, including increasing, constant, decreasing, humped and bowed trajectories for both long- and short-lived species. This diversity challenges theoreticians to develop broader perspectives on the evolution of ageing and empiricists to study the demography of more species.
DOI: 10.1111/1365-2745.12088
发表时间: 2013-05
期刊: The Journal of ecology
影响因子: --
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