PANGAEA_995107 Seawater carbonate chemistry and ocean alkalinity enhancement on Oikopleura dioica abundances and their house production capacity Bhaumik, Amrita; Sánchez, Nicolás; Goldenberg, Silvan Urs; Spjelkavik, Synne; Couret, María; Riebesell, Ulf; Boersma, Maarten; Jaspers, Cornelia Seawater carbonate chemistry and ocean alkalinity enhancement on Oikopleura dioica abundances and their house production capacity 2026-05-19 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.995107 Investigator Amrita Bhaumik amrita.bhaumik@nioz.nl Investigator Yan Yang yangyan@xmu.edu.cn Earth Science Type of study Species, unique identification Day of experiment Phase Treatment Change in alkalinity, total Abundance per volume Abundance House production rate, per individual Clearance rate per individual Salinity Temperature, water Alkalinity, total pH, total scale Carbon, inorganic, dissolved Partial pressure of carbon dioxide (water) at sea surface temperature (wet air) Calcite saturation state Aragonite saturation state Bicarbonate ion Carbon dioxide Carbonate system computation flag Fugacity of carbon dioxide (water) at sea surface temperature (wet air) Carbonate ion geoscientificInformation Animalia Behaviour Biomass/Abundance/Elemental composition Chordata Coast and continental shelf Growth/Morphology Laboratory experiment Mesocosm or benthocosm North Atlantic Ocean alkalinity enhancement Oikopleura dioica Other studied parameter or process Pelagos Single species Temperate Zooplankton Potentiometric Calculated using CO2SYS Calculated using seacarb after Nisumaa et al. (2010) Complete OA-ICC Ocean Acidification International Coordination Centre unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Bremen Bremen 28359 Germany online 2860 data points text/tab-separated-values Bhaumik, Amrita; Sánchez, Nicolás; Goldenberg, Silvan Urs; Spjelkavik, Synne; Couret, María; Riebesell, Ulf; Boersma, Maarten; Jaspers, Cornelia (2026): Resilience of the gelatinous zooplankton species Oikopleura dioica to ocean alkalinity enhancement. PLoS ONE, 21(3), e0344503, https://doi.org/10.1371/journal.pone.0344503 Schneider, Julieta; Riebesell, Ulf; Moras, Charly; Marín-Samper, Laura; Kittu, Leila; Ortiz Cortes, Joaquin; Schulz, Kai Georg (2025): KOSMOS 2022 Bergen mesocosm study on ocean alkalinity enhancement: carbonate chemistry , CO2 flux data and calcification estimates [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.983061 (The original carbonate chemistry data as well as temperature and salinity data were downloaded from this dataset.) Bhaumik, Amrita; Sánchez, Nicolás; Goldenberg, Silvan Urs; Spjelkavik, Synne; Couret, Maria; Riebesell, Ulf; Boersma, Maarten; Jaspers, Cornelia (2025): Data underlying figures for: Resilience of the gelatinous zooplankton species Oikopleura dioica to ocean alkalinity enhancement (PONE-D-25-40260) [dataset]. Zenodo, https://doi.org/10.5281/ZENODO.18011790 Nisumaa, Anne-Marin; Pesant, Stephane; Bellerby, Richard G J; Delille, Bruno; Middelburg, Jack J; Orr, James C; Riebesell, Ulf; Tyrrell, Toby; Wolf-Gladrow, Dieter A; Gattuso, Jean-Pierre (2010): EPOCA/EUR-OCEANS data compilation on the biological and biogeochemical responses to ocean acidification. Earth System Science Data, 2(2), 167-175, https://doi.org/10.5194/essd-2-167-2010 Yang, Yan; Brockmann, Patrick; Galdino, Carolina; Schindler, Uwe; Gazeau, Frédéric (2024): An update of data compilation on the biological response to ocean acidification and overview of the OA-ICC data portal. Earth System Science Data, 16(8), 3771-3780, https://doi.org/10.5194/essd-16-3771-2024 Yang, Yan; Hansson, L; Gattuso, Jean-Pierre (2016): Data compilation on the biological response to ocean acidification: an update. Earth System Science Data, 8(1), 79-87, https://doi.org/10.5194/essd-8-79-2016 Gattuso, Jean-Pierre; Epitalon, Jean-Marie; Lavigne, Héloïse; Orr, James; Gentili, Bernard; Hagens, Mathilde; Hofmann, Andreas; Mueller, Jens-Daniel; Proye, Aurélien; Rae, James; Soetaert, Karline (2024): seacarb: seawater carbonate chemistry with R. R package version 3.3.3. https://cran.r-project.org/web/packages/seacarb/index.html

Here, we assessed the response of a key gelatinous zooplankton species to ocean alkalinity enhancement in a 53-day mesocosm experiment in a temperate Norwegian fjord. Oikopleura dioica is a globally distributed zooplankton member, known for its high secondary production capacity and key role in vertical carbon flux. O. dioica continuously produces mucous feeding structures ('houses'), which efficiently retain submicron particles. Once discarded, these houses can sink rapidly and contribute to vertical carbon exports. To test the impacts of OAE on O. dioica abundances and their house production capacity, we exposed natural plankton communities to non-CO2-equilibrated OAE scenarios spanning a ΔTA range from 0–600 μmol/kg, using silicate-based (olivine) and calcium-based (slaked lime) minerals. Population dynamics of O. dioica were monitored alongside the plankton community, and targeted bottle incubations were used to quantify house production and feeding rates. This dataset is included in the OA-ICC data compilation maintained in the framework of the IAEA Ocean Acidification International Coordination Centre (see https://oa-icc.ipsl.fr). Original data were downloaded from zenodo (see Source) by the OA-ICC data curator. In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2024) 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 2026-05-18. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.995107"!

http://mel.xmu.edu.cn/en/ https://cran.r-project.org/web/packages/seacarb/index.html seacarb: seawater carbonate chemistry with R. R package version 3.3.3 https://doi.org/10.1371/journal.pone.0344503 Resilience of the gelatinous zooplankton species Oikopleura dioica to ocean alkalinity enhancement https://doi.org/10.5194/essd-16-3771-2024 An update of data compilation on the biological response to ocean acidification and overview of the OA-ICC data portal https://doi.org/10.5194/essd-2-167-2010 Calculated using seacarb after Nisumaa et al. (2010) https://doi.org/10.5194/essd-2-167-2010 EPOCA/EUR-OCEANS data compilation on the biological and biogeochemical responses to ocean acidification https://doi.org/10.5194/essd-8-79-2016 Data compilation on the biological response to ocean acidification: an update https://doi.org/10.5281/ZENODO.18011790 Data underlying figures for: Resilience of the gelatinous zooplankton species Oikopleura dioica to ocean alkalinity enhancement (PONE-D-25-40260) https://doi.pangaea.de/10.1594/PANGAEA.983061 KOSMOS 2022 Bergen mesocosm study on ocean alkalinity enhancement: carbonate chemistry , CO2 flux data and calcification estimates https://www.iaea.org/services/oa-icc/science-and-collaboration/data-access-and-management OA-ICC DIF 9.4 2026-05-19 2026-05-19