Seawater carbonate chemistry and larval size, number of significant SNPs of Mytilus galloprovincialis

• Main Authors: Bitter, M C, Kapsenberg, Lydia, Gattuso, Jean-Pierre, Pfister, Catherine A
• Format: Dataset
• Language: English
• Published: PANGAEA 2019
• Subjects: Alkalinity; total; Animalia; Aragonite saturation state; Bicarbonate ion; Bottles or small containers/Aquaria (<20 L); Calcite saturation state; Calculated using seacarb; Calculated using seacarb after Nisumaa et al. (2010); Carbon; inorganic; dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Category; Coast and continental shelf; EXP; Experiment; Figure; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Gene expression (incl. proteomics); Growth/Morphology; Height; Identification; Laboratory experiment; Length; Mediterranean Sea; Mollusca; Mytilus galloprovincialis; Number of single nucleotide polymorphisms; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; Potentiometric; Potentiometric titration; Registration number of species; Replicates; Salinity; standard deviation; Single species; Size; Species; Temperate; Temperature; water; Thau_Lagoon; Ocean acidification
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.911395; https://doi.org/10.1594/PANGAEA.911395

Global climate change has intensified the need to assess the capacity for natural populations to adapt to abrupt shifts in the environment. Reductions in seawater pH constitute a conspicuous global change stressor that is affecting marine ecosystems globally. Here, we quantify the phenotypic and genetic modifications associated with rapid adaptation to reduced seawater pH in the Mediterranean mussel, Mytilus galloprovincialis. We reared a genetically diverse larval population in two pH treatments (pHT 8.1 and 7.4) and tracked changes in the shell-size distribution and genetic variation through settlement. Additionally, we identified differences in the signatures of selection on shell growth in each pH environment. Both phenotypic and genetic data show that standing variation can facilitate adaptation to declines in seawater pH. This work provides insight into the processes underpinning rapid evolution, and demonstrates the importance of maintaining variation within natural populations to bolster species' adaptive capacity as global change progresses.