Seasonality and competition select for variable germination behavior in perennials.

Autor:	Ten Brink H; Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zurich, Switzerland.; Department of Fish Ecology and Evolution, Center of Ecology, Evolution, and Biogeochemistry, Eawag Swiss Federal Institute of Aquatic Science and Technology, Kastanienbaum, Switzerland.; Department of Coastal Systems, Royal Netherlands Institute for Sea Research, Texel, The Netherlands., Haaland TR; Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zurich, Switzerland.; Centre for Biodiversity Dynamics, Department of Biology, Norwegian University of Science and Technology, Trondheim, Norway., Massol F; University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 9017-(CIIL) Center for Infection and Immunity of Lille, Lille, France., Opedal ØH; Department of Biology, Biodiversity Unit, Lund University, Lund, Sweden.
Jazyk:	angličtina
Zdroj:	Evolution; international journal of organic evolution [Evolution] 2023 Jul 27; Vol. 77 (8), pp. 1791-1805.
DOI:	10.1093/evolut/qpad089
Abstrakt:	The occurrence of within-population variation in germination behavior and associated traits such as seed size has long fascinated evolutionary ecologists. In annuals, unpredictable environments are known to select for bet-hedging strategies causing variation in dormancy duration and germination strategies. Variation in germination timing and associated traits is also commonly observed in perennials and often tracks gradients of environmental predictability. Although bet-hedging is thought to occur less frequently in long-lived organisms, these observations suggest a role of bet-hedging strategies in perennials occupying unpredictable environments. We use complementary analytical and evolutionary simulation models of within-individual variation in germination behavior in seasonal environments to show how bet-hedging interacts with fluctuating selection, life-history traits, and competitive asymmetries among germination strategies. We reveal substantial scope for bet-hedging to produce variation in germination behavior in long-lived plants, when "false starts" to the growing season results in either competitive advantages or increased mortality risk for alternative germination strategies. Additionally, we find that lowering adult survival may, in contrast to classic bet-hedging theory, result in less spreading of germination by decreasing density-dependent competition. These models extend insights from bet-hedging theory to perennials and explore how competitive communities may be affected by ongoing changes in climate and seasonality patterns. (© The Author(s) 2023. Published by Oxford University Press on behalf of The Society for the Study of Evolution (SSE).)
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu