POPULATION-DENSITY EFFECTS ON LONGEVITY
POPULATION-DENSITY EFFECTS ON LONGEVITY
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DOI：
10.1007/bf01435991
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发表时间：
1993-01-01
期刊：
影响因子：
1.5
通讯作者：
MUELLER, LD
中科院分区：
文献类型：
--
作者：
GRAVES, JL;MUELLER, LD
人口密度，或环境中相对于有限资源的成年人数量，可能对生物体的寿命产生重要的长期和短期影响。在本文中，我们总结了拥挤可能对寿命产生直接影响的方式，无论是通过被称为饮食限制的现象，还是通过大量个体的存在所带来的环境质量的改变。我们还考虑了自然选择过程中人口密度对寿命可能产生的长期影响。关于人口密度对长寿进化的可能影响，有很多理论推测，但几乎没有实验证据来验证这些想法。我们讨论了一些存在的理论和经验证据，并表明人口密度是一个重要的因素，在决定立即生存的机会和自然选择的过程。
Population density, or the number of adults in an environment relative to the limiting resources, may have important long and short term consequences for the longevity of organisms. In this paper we summarize the way in which crowding may have an immediate impact on longevity, either through the phenomenon known as dietary restriction or through alterations in the quality of the environment brought on by the presence of large numbers of individuals. We also consider the possible long term consequences of population density on longevity by the process of natural selection. There has been much theoretical speculation about the possible impact of population density on the evolution of longevity but little experimental evidence has been gathered to test these ideas. We discuss some of the theory and empirical evidence that exists and show that population density is an important factor in determining both the immediate chances of survival and the course of natural selection.