Life-History Variation Predicts the Effects of Demographic Stochasticity on Avian Population Dynamics

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2004
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Sæther, Bernt-Erik
Engen, Steinar
Møller, Anders Pape
Weimerskirch, Henri
Visser, Marcel E.
Matthysen, Erik
Lambrechts, Marcel M.
Badyaev, Alexander
Becker, Peter H.
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The American Naturalist. University of Chicago Press. 2004, 164(6), pp. 793-802. ISSN 0003-0147. eISSN 1537-5323. Available under: doi: 10.1086/425371
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Comparative analyses of avian population fluctuations have shown large interspecific differences in population variability that have been difficult to relate to variation in general ecological characteristics. Here we show that interspecific variation in demographic stochasticity, caused by random variation among individuals in their fitness contributions, can be predicted from a knowledge of the species' position along a "slow-fast" gradient of life-history variation, ranging from high reproductive species with short life expectancy at one end to species that often produce a single offspring but survive well at the other end of the continuum. The demographic stochasticity decreased with adult survival rate, age at maturity, and generation time or the position of the species toward the slow end of the slow-fast life-history gradient. This relationship between life-history characteristics and demographic stochasticity was related to interspecific differences in the variation among females in recruitment as well as to differences in the individual variation in survival. Because reproductive decisions in birds are often subject to strong natural selection, our results provide strong evidence for adaptive modifications of reproductive investment through life-history evolution of the influence of stochastic variation on avian population dynamics.

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570 Biowissenschaften, Biologie
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demographic stochasticity, environmental stochasticity, life‐history variation, stochastic population dynamics, birds
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ISO 690SÆTHER, Bernt-Erik, Steinar ENGEN, Anders Pape MØLLER, Henri WEIMERSKIRCH, Marcel E. VISSER, Wolfgang FIEDLER, Erik MATTHYSEN, Marcel M. LAMBRECHTS, Alexander BADYAEV, Peter H. BECKER, 2004. Life-History Variation Predicts the Effects of Demographic Stochasticity on Avian Population Dynamics. In: The American Naturalist. University of Chicago Press. 2004, 164(6), pp. 793-802. ISSN 0003-0147. eISSN 1537-5323. Available under: doi: 10.1086/425371
BibTex
@article{Sther2004-12LifeH-51411,
  year={2004},
  doi={10.1086/425371},
  title={Life-History Variation Predicts the Effects of Demographic Stochasticity on Avian Population Dynamics},
  number={6},
  volume={164},
  issn={0003-0147},
  journal={The American Naturalist},
  pages={793--802},
  author={Sæther, Bernt-Erik and Engen, Steinar and Møller, Anders Pape and Weimerskirch, Henri and Visser, Marcel E. and Fiedler, Wolfgang and Matthysen, Erik and Lambrechts, Marcel M. and Badyaev, Alexander and Becker, Peter H.}
}
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