Adaptive responses to temperature and precipitation variation at the early-life stages of <em>Pinus sylvestris</em>
Ramírez-Valiente, José Alberto; Solé-Medina, Aida; Pyhäjärvi, Tanja; Savolainen, Outi; Heer, Katrin; Opgenoorth, Lars; Danusevicius, Darius; Robledo-Arnuncio, Juan José (2021-10-20)
Ramírez-Valiente, J.A., Solé-Medina, A., Pyhäjärvi, T., Savolainen, O., Heer, K., Opgenoorth, L., Danusevicius, D. and Robledo-Arnuncio, J.J. (2021), Adaptive responses to temperature and precipitation variation at the early-life stages of Pinus sylvestris. New Phytol, 232: 1632-1647. https://doi.org/10.1111/nph.17678
© 2021 The Authors. New Phytologist © 2021 New Phytologist Foundation. This is the peer reviewed version of the following article: Ramírez-Valiente, J.A., Solé-Medina, A., Pyhäjärvi, T., Savolainen, O., Heer, K., Opgenoorth, L., Danusevicius, D. and Robledo-Arnuncio, J.J. (2021), Adaptive responses to temperature and precipitation variation at the early-life stages of Pinus sylvestris. New Phytol, 232: 1632-1647, which has been published in final form at https://doi.org/10.1111/nph.17678. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.
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https://urn.fi/URN:NBN:fi-fe202201199397
Tiivistelmä
Summary
Early-stage fitness variation has been seldom evaluated at broad scales in forest tree species, despite the long tradition of studying climate-driven intraspecific genetic variation. In this study, we evaluated the role of climate in driving patterns of population differentiation at early-life stages in Pinus sylvestris and explored the fitness and growth consequences of seed transfer within the species range.
We monitored seedling emergence, survival and growth over a 2-yr period in a multi-site common garden experiment which included 18 European populations and spanned 25° in latitude and 1700 m in elevation.
Climate–fitness functions showed that populations exhibited higher seedling survival and growth at temperatures similar to their home environment, which is consistent with local adaptation. Northern populations experienced lower survival and growth at warmer sites, contrary to previous studies on later life stages. Seed mass was higher in populations from warmer areas and was positively associated with survival and growth at more southern sites. Finally, we did not detect a survival–growth trade-off; on the contrary, bigger seedlings exhibited higher survival probabilities under most climatic conditions.
In conclusion, our results reveal that contrasting temperature regimes have played an important role in driving the divergent evolution of P. sylvestris populations at early-life stages.
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