Seawater carbonate chemistry and carbon and nitrogen fixation in the hermatypic coral Galaxea fascicularis ...

• Main Authors: Zheng, Xinqing, Wang, Chenying, Sheng, Huaxia, Niu, Gaofeng, Dong, Xu, Yuan, Lingling, Shi, Tuo
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: Animalia; Benthic animals; Benthos; Calcification/Dissolution; Cnidaria; Coast and continental shelf; Containers and aquaria 20-1000 L or < 1 m**2; Galaxea fascicularis; Laboratory experiment; North Pacific; Other metabolic rates; Primary production/Photosynthesis; Single species; Tropical; Type; Species; Registration number of species; Uniform resource locator/link to reference; Experiment duration; Treatment; Effective quantum yield; Effective quantum yield, standard deviation; Maximum quantum yield of photosystem II; Maximum quantum yield of photosystem II, standard deviation; Calcification rate; Calcification rate, standard deviation; Photosynthetically fixed carbon assimilation rate, carbon in tracer/carbon in tissue; Photosynthetically fixed carbon assimilation rate, carbon in tracer/carbon in tissue, standard deviation; Diazotrophically-derived nitrogen assimilation rate, nitrogen in tracer/nitrogen in tissue; Diazotrophically-derived nitrogen assimilation rate, nitrogen in tracer/nitrogen in tissue, standard deviation; δ13C; δ13C, standard deviation; δ15N; δ15N, standard deviation; pH; pH, 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; Carbon dioxide; Carbon dioxide, standard deviation; Bicarbonate ion; Bicarbonate ion, standard deviation; Carbonate ion; Carbonate ion, standard deviation; Aragonite saturation state; Aragonite saturation state, standard deviation; Temperature, water; Temperature, water, standard deviation; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.932784; https://doi.pangaea.de/10.1594/PANGAEA.932784

The supply of metabolites from symbionts to scleractinian corals is crucial to coral health. Members of the Symbiodiniaceae can enhance coral calcification by providing photosynthetically fixed carbon (PFC) and energy, whereas dinitrogen (N2)-fixing bacteria can provide additional nutrients such as diazotrophically-derived nitrogen (DDN) that sustain coral productivity especially when alternative external nitrogen sources are scarce. How these mutualistic associations benefit corals in the future acidifying ocean is not well understood. In this study, we investigated the possible effects of ocean acidification (OA; pHs 7.7 and 7.4 vs. 8.1) on calcification in the hermatypic coral Galaxea fascicularis with respect to PFC and DDN assimilation. Our measurements based on isotopic tracing showed no significant differences in the assimilation of PFC among different pH treatments, but the assimilation of DDN decreased significantly after 28 days of stress at pH 7.4. The decreased DDN assimilation suggests a ... : 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 2021-06-17. ...