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Climate drives among-year variation in natural selection on flowering time
Stockholm University, Faculty of Science, Department of Ecology, Environment and Plant Sciences.
Stockholm University, Faculty of Science, Department of Ecology, Environment and Plant Sciences.ORCID iD: 0000-0001-9281-2871
Number of Authors: 22020 (English)In: Ecology Letters, ISSN 1461-023X, E-ISSN 1461-0248, Vol. 23, no 4, p. 653-662Article in journal (Refereed) Published
Abstract [en]

To predict long-term responses to climate change, we need to understand how changes in temperature and precipitation elicit both immediate phenotypic responses and changes in natural selection. We used 22 years of data for the perennial herb Lathyrus vernus to examine how climate influences flowering phenology and phenotypic selection on phenology. Plants flowered earlier in springs with higher temperatures and higher precipitation. Early flowering was associated with a higher fitness in nearly all years, but selection for early flowering was significantly stronger in springs with higher temperatures and lower precipitation. Climate influenced selection through trait distributions, mean fitness and trait-fitness relationships, the latter accounting for most of the among-year variation in selection. Our results show that climate both induces phenotypic responses and alters natural selection, and that the change in the optimal phenotype might be either weaker, as for spring temperature, or stronger, as for precipitation, than the optimal response.

Place, publisher, year, edition, pages
2020. Vol. 23, no 4, p. 653-662
Keywords [en]
Climate, Lathyrus vernus, phenology, phenotypic plasticity, phenotypic selection, selection gradients, timing of reproduction
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:su:diva-179603DOI: 10.1111/ele.13468ISI: 000509700900001PubMedID: 31994327OAI: oai:DiVA.org:su-179603DiVA, id: diva2:1415416
Available from: 2020-03-18 Created: 2020-03-18 Last updated: 2020-03-18Bibliographically approved

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Ehrlén, JohanValdés, Alicia
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