Influence of life-history tactics on transient dynamics: a comparative analysis across mammalian populations.
Influence of life-history tactics on transient dynamics: a comparative analysis across mammalian populations.
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DOI：
10.1086/677929
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发表时间：
2014-11
期刊：
影响因子：
--
通讯作者：
Gaillard JM
中科院分区：
文献类型：
--
作者：
Gamelon M;Gimenez O;Baubet E;Coulson T;Tuljapurkar S;Gaillard JM
大多数哺乳动物种群遭受自然或人为干扰;种群不再处于平衡状态（即处于稳定（st）年龄分布），并表现出瞬态动态。从文献调查中，我们研究了哺乳动物物种的瞬态动力学模式，跨越了大范围的生活史策略和人口增长率。对于每个种群，我们建立了一个年龄结构矩阵，并计算了六个瞬态动力学指标。在控制了可能的混杂效应的物种之间的系统发育相关性，使用系统发育主成分分析和系统发育广义最小二乘模型，我们发现，哺乳动物种群的干扰的短期人口响应的世代时间和增长率的形状。生活节奏缓慢的物种（即成熟晚、繁殖力低、寿命长的物种）在干扰后种群规模下降，而生活节奏快的物种种群规模增加。种群规模的短期变化幅度随着渐近种群增长而增加，在缓慢生长的物种（即种群增长率低的物种）中得到缓冲，但在快速生长的物种中很大。通过展示瞬态动态，生活史（世代时间）和生态（人口制度）之间的直接联系，我们的瞬态动态的比较分析，显然提高了我们的理解，在可变的环境中的人口动态，并有明确的影响，为未来的研究进化和生态动态之间的相互作用。由于大多数种群在野外不处于平衡状态，我们建议进行瞬态动态分析时，在可变环境中研究种群动态。
Most mammalian populations suffer from natural or human-induced disturbances; populations are no longer at the equilibrium (i.e. at stable (st)age distribution) and exhibit transient dynamics. From a literature survey, we studied patterns of transient dynamics for mammalian species spanning a large range of life history tactics and population growth rates. For each population, we built an age-structured matrix and calculated six metrics of transient dynamics. After having controlled for possible confounding effects of the phylogenetic relatedness among species using a Phylogenetic Principal Component Analysis and Phylogenetic Generalized Least-Squares models, we found that short-term demographic responses of mammalian populations to disturbance are shaped by generation time and growth rate. Species with a slow pace of life (i.e. species with a late maturity, a low fecundity, and a long lifespan) displayed decreases in population size after a disturbance, whereas fast-living species increased in population size. The magnitude of short-term variation in population size increased with asymptotic population growth, being buffered in slow-growing species (i.e. species with a low population growth rate), but large in fast-growing species. By demonstrating direct links between transient dynamics, life history (generation time), and ecology (demographic regime), our comparative analysis of transient dynamics clearly improves our understanding of population dynamics in variable environments and has clear implications for future studies of the interplay between evolutionary and ecological dynamics. As most populations in the wild are not at equilibrium, we recommend analyses of transient dynamics to be performed when studying population dynamics in variable environments.
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影响因子：
6.6
作者：
Baudisch, Annette
通讯作者：
Baudisch, Annette
影响因子：
3.3
作者：
Gamelon, Marlene;Besnard, Aurelien;Gimenez, Olivier
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Gimenez, Olivier
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作者：
EMLEN, JM
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EMLEN, JM
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2.9
作者：
Bielby, J.;Mace, G. M.;Purvis, A.
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作者：
FENCHEL, T
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