Seawater carbonate chemistry and Hydrozoa, Copepoda abundances and biomasses, and Clupea harengus biomass, survival, condition ...

• Main Authors: Spisla, Carsten, Taucher, Jan, Sswat, Michael, Wunderow, Hennrike, Kohnert, Peter, Clemmesen, Catriona, Riebesell, Ulf
• Format: Dataset
• Language: English
• Published: PANGAEA 2022
• Subjects: Biomass/Abundance/Elemental composition; Coast and continental shelf; Entire community; Field experiment; Growth/Morphology; Mesocosm or benthocosm; Mortality/Survival; North Atlantic; Pelagos; Temperate; Event label; Type; DATE/TIME; Day of experiment; Mesocosm label; Treatment partial pressure of carbon dioxide; Salinity; Temperature, water; Chlorophyll a; Aglantha digitale; Clytia sp.; Obelia geniculata; Rathkea octopunctata; Sarsia tubulosa; Tomopteris sp.; Indeterminata; Mass per volume; Treatment; Identification; Fish; Volume; Abundance per volume; Dry mass per individual; Dry mass; Status; Number of individuals; Fraction; Time in days; Sample code/label; Origin; Method comment; Species; Individuals; Length, standard; Individual dry mass; Ratio; Temperature, water, standard deviation; Salinity, standard deviation; Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.949380; https://doi.pangaea.de/10.1594/PANGAEA.949380

Anthropogenic CO2 emissions cause a drop in seawater pH and shift the inorganic carbon speciation. Collectively, the term ocean acidification (OA) summarizes these changes. Few studies have examined OA effects on predatory plankton, e.g. Hydrozoa and fish larvae as well as their interaction in complex natural communities. Because Hydrozoa can seriously compete with and prey on other higher-level predators such as fish, changes in their abundances may have significant consequences for marine food webs and ecosystem services. To investigate the interaction between Hydrozoa and fish larvae influenced by OA, we enclosed a natural plankton community in Raunefjord, Norway, for 53 days in eight ≈ 58 m³ pelagic mesocosms. CO2 levels in four mesocosms were increased to ≈ 2000 µatm pCO2, whereas the other four served as untreated controls. We studied OA-induced changes at the top of the food web by following ≈2000 larvae of Atlantic herring (Clupea harengus) hatched inside each mesocosm during the first week of the ... : 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 2022-10-04. ...