PANGAEA_993444 Seawater carbonate chemistry and Biological response of eelgrass epifauna, Taylor's Sea hare (Phyllaplysia taylori) and eelgrass isopod (Idotea resecata), to elevated ocean alkalinity Jones, Kristin; Hemery, Lenaïg G; Ward, Nicholas D; Regier, Peter J; Ringham, Mallory C; Eisaman, Matthew D Seawater carbonate chemistry and Biological response of eelgrass epifauna, Taylor's Sea hare (Phyllaplysia taylori) and eelgrass isopod (Idotea resecata), to elevated ocean alkalinity 2026-04-03 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.993444 Investigator Kristin Jones kristin.jones@pnnl.gov Investigator Yan Yang yangyan@xmu.edu.cn Earth Science Type of study Species, unique identification Species, unique identification (URI) Species, unique identification (Semantic URI) Experiment duration Treatment Identification Time in days Individuals Temperature, water Temperature, water, standard deviation Salinity Salinity, standard deviation Oxygen, dissolved Oxygen, dissolved, standard deviation pH, NBS scale pH, standard deviation Partial pressure of carbon dioxide (water) at sea surface temperature (wet air) Partial pressure of carbon dioxide, standard deviation Alkalinity, total Alkalinity, total, standard deviation Carbon, inorganic, dissolved Carbon, inorganic, dissolved, standard deviation Aragonite saturation state Aragonite saturation state, standard deviation Carbonate system computation flag pH, total scale Carbon dioxide Fugacity of carbon dioxide (water) at sea surface temperature (wet air) Bicarbonate ion Carbonate ion Calcite saturation state geoscientificInformation Animalia Arthropoda Benthic animals Benthos Bottles or small containers/Aquaria (<20 L) Idotea resecata Laboratory experiment Laboratory strains Mollusca Mortality/Survival Not applicable Ocean alkalinity enhancement Phyllaplysia taylori Single species Sodium hydroxide 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 7296 data points text/tab-separated-values Jones, Kristin; Hemery, Lenaïg G; Ward, Nicholas D; Regier, Peter J; Ringham, Mallory C; Eisaman, Matthew D (2025): Biological response of eelgrass epifauna, Taylor's Sea hare ( Phyllaplysia taylori ) and eelgrass isopod ( Idotea resecata ), to elevated ocean alkalinity. Biogeosciences, 22(6), 1615-1630, https://doi.org/10.5194/bg-22-1615-2025 Jones, Kristin; Hemery, Lenaïg G; Ward, Nicholas D; Regier, Peter J; Ringham, Mallory C; Eisaman, Matthew D (2025): Biological response of eelgrass epifauna, Taylor's Sea hare (Phyllaplysia taylori) and eelgrass isopod (Idotea resecata), to elevated ocean alkalinity from 2023-07-24 to 2023-09-29 (NCEI Accession 0302063) [dataset]. NOAA National Centers for Environmental Information, https://doi.org/10.25921/53S1-H309 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

This study aims to address this knowledge gap by testing the effects of increased pH and alkalinity, delivered in the form of aqueous NaOH, on two eelgrass epifauna in the US Pacific Northwest, Taylor's sea hare (Phyllaplysia taylori) and eelgrass isopod (Idotea resecata), chosen for their ecological importance as salmon prey and for their role in eelgrass ecosystems. Four-day experiments were conducted in closed bottles to allow measurements of the evolution of carbonate species throughout the experiment, with water refreshed twice daily to maintain elevated pH, across pHNBS (NBS standard scale) treatments ranging from 7.8 to 9.3. 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 NOAA National Centers for Environmental Information (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 2026-04-03. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.993444"! ** Species names should be interpreted as scientific names following standard nomenclature, even though they appear in plain text.

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/10.25921/53S1-H309 Biological response of eelgrass epifauna, Taylor's Sea hare (Phyllaplysia taylori) and eelgrass isopod (Idotea resecata), to elevated ocean alkalinity from 2023-07-24 to 2023-09-29 (NCEI Accession 0302063) https://doi.org/10.5194/bg-22-1615-2025 Biological response of eelgrass epifauna, Taylor's Sea hare ( Phyllaplysia taylori ) and eelgrass isopod ( Idotea resecata ), to elevated ocean alkalinity 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://www.iaea.org/services/oa-icc/science-and-collaboration/data-access-and-management OA-ICC DIF 9.4 2026-04-03 2026-09-21