Seawater carbonate chemistry and the toxicity of a hydrophobic organic compound on a benthic community ...

• Main Authors: Ferraz, Mariana Aliceda, Kiyama, Ana Carolina, Primel, Ednei Gilberto, Barbosa, Sergiane Caldas, Castro, Ítalo Braga, Choueri, R B, Gallucci, Fabiane
• Format: Dataset
• Language: English
• Published: PANGAEA 2022
• Subjects: Benthos; Bottles or small containers/Aquaria <20 L; Brackish waters; Community composition and diversity; Entire community; Laboratory experiment; Organic toxins; Soft-bottom community; South Atlantic; Temperate; Type; Treatment pH; Experiment day; Individuals; Individuals, standard deviation; Treatment; Genus richness; Genus richness, standard deviation; Cybutryne; Temperature, water; Temperature, water, standard deviation; pH; pH, standard deviation; Salinity; Salinity, standard deviation; Alkalinity, total; Alkalinity, total, standard deviation; Partial pressure of carbon dioxide water at sea surface temperature wet air; Partial pressure of carbon dioxide, standard deviation; Bicarbonate ion; Bicarbonate ion, standard deviation; Carbonate ion; Carbonate ion, standard deviation; Carbon dioxide; Carbon dioxide, standard deviation; Calcite saturation state; Calcite saturation state, standard deviation; Aragonite saturation state; Aragonite saturation state, standard deviation; Carbonate system computation flag; Fugacity of carbon dioxide water at sea surface temperature wet air; Fugacity of carbon dioxide in seawater, standard deviation; Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Experiment; Potentiometric; Potentiometric titration; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. 2010; Calculated using seacarb after Orr et al. 2018; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.947936; https://doi.pangaea.de/10.1594/PANGAEA.947936

Natural pH values in coastal waters vary largely among locations, ecosystems, and time periods; still, there is an ongoing acidification trend. In this scenario, more acidic pH values can alter bioavailability of organic contaminants, to organisms. Despite this, interactive effects between pH and chemical substances are not usually considered in Ecological Risk Assessment protocols. This study investigated the effects of pH on the toxicity of a hydrophobic organic compound on a benthic community using a microcosm experiment setup to assess the response of nematode assemblages exposed to environmentally relevant concentrations of Irgarol at two natural pH conditions. Estuarine nematode assemblages were exposed to two concentrations of Irgarol at pH 7.0 and 8.0 for periods of 7 and 35 days. Lower diversity of nematode genera was observed at the highest tested Irgarol concentration (1281 ± 65 ng/g). The results showed that the effects of Irgarol contamination were independent of pH variation, indicating no ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2021) 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 2022-09-06. ...