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Marine Biology

, Volume 157, Issue 3, pp 683–688 | Cite as

Functional divergence in heat shock response following rapid speciation of Fucus spp. in the Baltic Sea

  • Asunción Lago-Lestón
  • Catarina Mota
  • Lena Kautsky
  • Gareth A. PearsonEmail author
Short Communication

Abstract

In the Baltic Sea, the broadly distributed brown alga Fucus vesiculosus coexists in sympatry over part of its range (south west Gulf of Bothnia) with the Baltic endemic F. radicans sp. nov, while further north in colder and lower-salinity areas of the Baltic F. radicans occurs alone (north west Gulf of Bothnia). F. radicans appears to have arisen via rapid speciation from F. vesiculosus within the recent history of the Baltic (ca. 7500 BP). Possible functional divergence between the two species was investigated by comparing stress-responsive gene expression in a common-garden experiment. The experiment used two allopatric populations of Fucus vesiculosus from the Skagerrak (North Sea) and Central Baltic, as well as F. radicans from the same Central Baltic site. The two species in sympatry displayed divergent heat shock responses, while F. vesiculosus populations from allopatric sites did not. F. radicans was more sensitive to heat shock at 25°C, either alone or together with high irradiance and desiccation, than Baltic or Skagerrak F. vesiculosus. The results indicate that rapid functional divergence in the inducible heat shock response has occurred between sympatric species on a timescale of thousands of years.

Keywords

Late Embryogenesis Abundant Heat Shock Response Desiccation Stressor Clonal Reproduction Allopatric Population 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

This work was supported by funding from FCT-FEDER (ADAPT—POCI-PPCDT/MAR/61105/2004), Portugal and the EU Network of Excellence Marine Genomics Europe (G.A.P.), and a PhD fellowship from FCT and ESF (A.L.). The authors are grateful to two anonymous reviewers for comments and suggestions that improved the manuscript.

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Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Asunción Lago-Lestón
    • 1
  • Catarina Mota
    • 1
  • Lena Kautsky
    • 2
  • Gareth A. Pearson
    • 1
    Email author
  1. 1.Centro de Ciências do Mar, CIMAR-Laboratorio AssociadoUniversidade do AlgarveFaroPortugal
  2. 2.Department of BotanyStockholm UniversityStockholmSweden

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