SENSITIVITY AND ADAPTATION POTENTIAL OF MYTILUS EDULIS TO OCEAN ACIDIFICATION: A MULTI-GENERATIONAL STUDY
This study investigates the response of the mussel Mytilus edulis to ocean acidification over multiple generations. The study area, Kiel Fjord, located in the western Baltic Sea, is a habitat with high seasonal pCO2 variability and peak pCO2 >2000µatm in summer. Despite these adverse conditions, M. edulis dominates the benthic ecosystem. However, in this coastal system much higher pCO2 levels are expected for the future and bivalve larvae react sensitively to elevated pCO2. In order to assess the adaptation potential, we have started a multi-generational experiment in 2012. By single crossings, 16 different families of the F1 generation were produced. Overall, larvae exhibited a high sensitivity to elevated pCO2 and survival was strongly affected. However, some families were able to accomplish the planktonic phase. The settled juveniles were raised for one year under constant pCO2 and matured in 2013. The animals were crossed to test whether tolerance to high pCO2 is inherited to the F2 generation, but limited transgenerational adaptation was observed. This suggests a high sensitivity of larval development to pCO2 levels expected for the future.
Thomsen, J., Geomar, Germany, firstname.lastname@example.org
Stapp, L., AWI, Germany, Laura.Stapp@awi.de
Haynert, K., Geomar, Germany, email@example.com
Wegner, M., AWI, Germany, Mathias.Wegner@awi.de
Melzner , F., Geomar, Germany, firstname.lastname@example.org
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