Seawater carbonate chemistry and biological processes during experiments with calcifiing organisms, 2009, supplement to: Ries, Justin B; Cohen, Anne L; McCorkle, Daniel C (2009): Marine calcifiers exhibit mixed responses to CO2-induced ocean acidification. Geology, 37(12), 1131-1134

• Main Authors: Ries, Justin B, Cohen, Anne L, McCorkle, Daniel C
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2009
• Subjects: Animalia; Annelida; Arbacia punctulata; Argopecten irradians; Arthropoda; Benthic animals; Benthos; Calcification/Dissolution; Callinectes sapidus; Chlorophyta; Cnidaria; Coast and continental shelf; Containers and aquaria 20-1000 L or < 1 m**2; Crassostrea virginica; Crepidula fornicata; Echinodermata; Eucidaris tribuloides; Halimeda incrassata; Homarus americanus; Hydroides crucigera; Laboratory experiment; Littorina littorea; Macroalgae; Mercenaria mercenaria; Mollusca; Mya arenaria; Mytilus edulis; Neogoniolithon sp.; North Atlantic; Oculina arbuscula; Penaeus plebejus; Plantae; Rhodophyta; Single species; Strombus alatus; Temperate; Urosalpinx cinerea; Identification; Sample ID; Species; Site; Salinity; Temperature, water; LightDark cycle; Radiation, photosynthetically active; Carbonate system computation flag; pH; Alkalinity, total; Carbon, inorganic, dissolved; Partial pressure of carbon dioxide water at sea surface temperature wet air; Fugacity of carbon dioxide water at sea surface temperature wet air; Carbon dioxide; Bicarbonate ion; Carbonate ion; Aragonite saturation state; Calcite saturation state; Survival; Buoyant weight; Calcium carbonate, dry weight; Calcification rate; Calculated using seacarb after Nisumaa et al. 2010; pH meter Orion; Alkalinity, Gran titration Gran, 1950; Calculated using CO2SYS; Infrared pCO2 analyzer Qubit S151; see references; Buoyant weighing technique Davies, 1989; European network of excellence for Ocean Ecosystems Analysis EUR-OCEANS; European Project on Ocean Acidification EPOCA; Ocean Acidification International Coordination Centre OA-ICC; Orion; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.733947; https://doi.pangaea.de/10.1594/PANGAEA.733947

Anthropogenic elevation of atmospheric carbon dioxide (pCO2) is making the oceans more acidic, thereby reducing their degree of saturation with respect to calcium carbonate (CaCO3). There is mounting concern over the impact that future CO2-induced reductions in the CaCO3 saturation state of seawater will have on marine organisms that construct their shells and skeletons from this mineral. Here, we present the results of 60 d laboratory experiments in which we investigated the effects of CO2-induced ocean acidification on calcification in 18 benthic marine organisms. Species were selected to span a broad taxonomic range (crustacea, cnidaria, echinoidea, rhodophyta, chlorophyta, gastropoda, bivalvia, annelida) and included organisms producing aragonite, low-Mg calcite, and high-Mg calcite forms of CaCO3. We show that 10 of the 18 species studied exhibited reduced rates of net calcification and, in some cases, net dissolution under elevated pCO2. However, in seven species, net calcification increased under the intermediate and/or highest levels of pCO2, and one species showed no response at all. These varied responses may reflect differences amongst organisms in their ability to regulate pH at the site of calcification, in the extent to which their outer shell layer is protected by an organic covering, in the solubility of their shell or skeletal mineral, and whether they utilize photosynthesis. Whatever the specific mechanism(s) involved, our results suggest that the impact of elevated atmospheric pCO2 on marine calcification is more varied than previously thought. : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne and Gattuso, 2011) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI).