Biogeographic vulnerability to ocean acidification and warming in a marine bivalve

• Published in: Marine Pollution Bulletin
• Main Authors: van Colen, Carl, Jansson, Anna, Saunier, Alice, Lacoue-Labarthe, Thomas, Vincx, Magda
• Other Authors: LIttoral ENvironnement et Sociétés (LIENSs), La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS), Marine Biology Section, Biology Department, Universiteit Gent = Ghent University (UGENT)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2018
• Subjects: [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology; Ocean acidification
• Online Access: https://hal.science/hal-01948324; https://doi.org/10.1016/j.marpolbul.2017.10.092

International audience Anthropogenic CO2 emissions are rapidly changing seawater temperature, pH and carbonate chemistry. This study compares the embryonic development under high pCO2 conditions across the south-north distribution range of the marine clam Limecola balthica in NW Europe. The combined effects of elevated temperature and reduced pH on hatching success and size varied strongly between the three studied populations, with the Gulf of Finland population appearing most endangered under the conditions predicted to occur by 2100. These results demonstrate that the assessment of marine faunal population persistence to future climatic conditions needs to consider the interactive effects of co-occurring physico-chemical alterations in seawater within the local context that determines population fitness, adaptation potential and the system resilience to environmental change.