Seawater carbonate chemistry and copepod traits and performance ...

• Main Authors: Aguilera, Victor M, Vargas, Cristian A, Dam, Hans G
• Format: Dataset
• Language: English
• Published: PANGAEA 2020
• Subjects: Acartia tonsa; Animalia; Arthropoda; Behaviour; Coast and continental shelf; Field observation; Growth/Morphology; Pelagos; Reproduction; FOS Medical biotechnology; Single species; South Pacific; Temperate; Upwelling; Zooplankton; Type; Species; Registration number of species; Uniform resource locator/link to reference; Depth, top/min; Depth, bottom/max; DEPTH, water; DATE/TIME; Temperature, water; Salinity; pH; Chlorophyll a; Body size; Egg production rate per female; Ingestion rate of chlorophyll a per day per individual; Alkalinity, total; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Partial pressure of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbonate ion; Carbon, inorganic, dissolved; Aragonite saturation state; Calcite saturation state; Experiment; Calculated using seacarb after Nisumaa et al. 2010; Ocean Acidification International Coordination Centre OA-ICC; Pacific; Ocean acidification; Copepods
• Online Access: https://dx.doi.org/10.1594/pangaea.925337; https://doi.pangaea.de/10.1594/PANGAEA.925337

Linking pH/pCO2 natural variation to phenotypic traits and performance of foundational species provides essential information for assessing and predicting the impact of ocean acidification (OA) on marine ecosystems. Yet, evidence of such linkage for copepods, the most abundant metazoans in the oceans, remains scarce, particularly for naturally corrosive Eastern Boundary Upwelling systems (EBUs). This study assessed the relationship between pH levels and traits (body and egg size) and performance (ingestion rate (IR) and egg reproduction rate (EPR)) of the numerically dominant neritic copepod Acartia tonsa, in a year-round upwelling system of the northern (23° S) Humboldt EBUs. The study revealed decreases in chlorophyll (Chl) ingestion rate, egg production rate and egg size with decreasing pH as well as egg production efficiency, but the opposite for copepod body size. Further, ingestion rate increased hyperbolically with Chl, and saturated at 1 µg Chl/ L. Food resources categorized as high (H, >1 µg/L) ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2020) 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 by seacarb is 2020-11-30. ...