Density Dependence Shapes Life-History Trade-Offs in a Food-Limited Population.

Autor: Jaggi H; Department of Biology, Stanford University, Stanford, California, USA., Zuo W; Department of Biology, Stanford University, Stanford, California, USA., Kentie R; NIOZ Netherlands Institute for sea Research, Den Burg (Texel), The Netherlands.; Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, The Netherlands., Gaillard JM; Laboratoire de Biométrie et Biologie Evolutive, Université Lyon 1, CNRS, UMR 5558, Villeurbanne, France., Coulson T; Department of Biology, University of Oxford, Oxford, UK., Tuljapurkar S; Department of Biology, Stanford University, Stanford, California, USA.
Jazyk: angličtina
Zdroj: Ecology letters [Ecol Lett] 2024 Nov; Vol. 27 (11), pp. e14551.
DOI: 10.1111/ele.14551
Abstrakt: Quantifying trade-offs within populations is important in life-history theory. However, most studies focusing on life-history trade-offs focus on two traits and assume trade-offs to be static. Our work provides a framework for understanding covariation among multiple traits and how population density influences the traits. Using detailed individual-based data for Soay sheep, we find density strongly shapes life-history trade-offs and distribution of lifetime reproductive success (LRS). At low density, a trade-off between juvenile survival and growth structures life-history variation, whereas at equilibrium density, trade-off between reproduction and juvenile survival is the major structuring axes. Contrary to Lomnicki's prediction, we find that at high density, there is little variation in the LRS over the sizes (large juveniles and adults) that contribute to reproduction. Our results advance an understanding of dynamic nature of trade-offs offer insights into how high-density limits diversity of individual life histories and have implications for evolution via density-dependent selection.
(© 2024 John Wiley & Sons Ltd.)
Databáze: MEDLINE
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