Effects of temperature and ocean acidification on shell characteristics of Argopecten purpuratus: implications for scallop aquaculture in an upwelling-influenced area, supplement to: Lagos, Nelson A; Benítez, Samanta; Duarte, Cristian; Lardies, Marco A; Broitman, Bernardo R; Tapia, Christian; Tapia, Pamela; Widdicombe, Steve; Vargas, Cristian A (2016): Effects of temperature and ocean acidification on shell characteristics of Argopecten purpuratus: implications for scallop aquaculture in an upwelling-influenced area. Aquaculture Environment Interactions, 8, 357-370

• Main Authors: Lagos, Nelson A, Benítez, Samanta, Duarte, Cristian, Lardies, Marco A, Broitman, Bernardo R, Tapia, Christian, Tapia, Pamela, Widdicombe, Steve, Vargas, Cristian A
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2016
• Subjects: Animalia; Argopecten purpuratus; Benthic animals; Benthos; Bottles or small containers/Aquaria <20 L; Calcification/Dissolution; Coast and continental shelf; Growth/Morphology; Laboratory experiment; Mollusca; Single species; South Atlantic; Temperate; Temperature; Type; Species; Registration number of species; Uniform resource locator/link to reference; Temperature, water; pH; Shell thickness; Thickness, standard error; Shell, dry mass; Shell, mass, standard error; Biomass, wet mass; Biomass, standard error; Growth rate; Growth rate, standard error; Calcification rate; Calcification rate, standard error; Dissolution rate; Dissolution rate, standard error; Temperature, water, standard deviation; Salinity; Salinity, standard deviation; pH, standard deviation; Alkalinity, total; Alkalinity, total, standard deviation; Carbonate ion; Carbonate ion, standard deviation; Partial pressure of carbon dioxide water at sea surface temperature wet air; Partial pressure of carbon dioxide, standard deviation; Calcite saturation state; Calcite saturation state, standard deviation; Aragonite saturation state; Aragonite saturation state, standard deviation; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbon, inorganic, dissolved; Potentiometric; Potentiometric titration; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. 2010; Ocean Acidification International Coordination Centre OA-ICC; Benítez; Duarte; Tapia; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.869455; https://doi.pangaea.de/10.1594/PANGAEA.869455

Coastal upwelling regions already constitute hot spots of ocean acidification as naturally acidified waters are brought to the surface. This effect could be exacerbated by ocean acidification and warming, both caused by rising concentrations of atmospheric CO2. Along the Chilean coast, upwelling supports highly productive fisheries and aquaculture activities. However, during recent years, there has been a documented decline in the national production of the native scallop Argopecten purpuratus. We assessed the combined effects of temperature and pCO2-driven ocean acidification on the growth rates and shell characteristics of this species farmed under the natural influence of upwelling waters occurring in northern Chile (30°S, Tongoy Bay). The experimental scenario representing current conditions (14 °C, pH 8.0) were typical of natural values recorded in Tongoy Bay, whilst conditions representing the low pH scenario were typical of an adjacent upwelling area (pH 7.6). Shell thickness, weight, and biomass were reduced under low pH (pH 7.7) and increased temperature (18 °C) conditions. At ambient temperature (14 °C) and low pH, scallops showed increased shell dissolution and low growth rates. However, elevated temperatures ameliorated the impacts of low pH, as evidenced by growth rates in both pH treatments at the higher temperature treatment that were not significantly different from the control treatment. The impact of low pH at current temperature on scallop growth suggests that the upwelling could increase the time required for scallops to reach marketable size. Mortality of farmed scallops is discussed in relation to our observations of multiple environmental stressors in this upwelling-influenced area. : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2016) 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). The date of carbonate chemistry calculation is 2016-12-13.