Total alkalinity and pH during a short-term feeding experiment testing the contribution of shellfish diet (Reed Mariculture SD1800) to seawater alkalinity

https://doi.pangaea.de/10.1594/PANGAEA.996217Rump, MarcoMarcoRump0009-0004-2329-4889Alfred Wegener Institute - Biological Institute HelgolandLannig, GiselaGiselaLannig0000-0002-9210-256XAlfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenBock, ChristianChristianBock0000-0003-0052-3090Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenBenthien, AlbertAlbertBenthien0000-0002-9159-3109Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenPogoda, BernadetteBernadettePogoda0000-0003-3997-426XAlfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenAntoni, DominikDominikAntoniAlfred Wegener Institute - Biological Institute HelgolandGerdts, GunnarGunnarGerdts0000-0003-0872-3927Alfred Wegener Institute - Biological Institute HelgolandTotal alkalinity and pH during a short-term feeding experiment testing the contribution of shellfish diet (Reed Mariculture SD1800) to seawater alkalinityPANGAEA2026ecotoxicologyocean alkalinity enhancementOstrea edulisEvent labelType of studySampling date/time, experimentExperiment dayTreatmentReplicatespHAlkalinity, totalMesocosm experiment2024-04-17T00:00:00/2025-03-12T00:00:00Datasethttps://doi.pangaea.de/10.1594/PANGAEA.996264https://doi.pangaea.de/10.1594/PANGAEA.996219https://doi.pangaea.de/10.1594/PANGAEA.996220https://doi.pangaea.de/10.1594/PANGAEA.996222https://doi.pangaea.de/10.1594/PANGAEA.996218https://doi.pangaea.de/10.1594/PANGAEA.996216https://doi.pangaea.de/10.1594/PANGAEA.996221https://doi.pangaea.de/10.1594/PANGAEA.996214https://doi.pangaea.de/10.1594/PANGAEA.996215504 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalData access is restricted (moratorium, sensitive data, license constraints)This dataset contains measurements of seawater pH and total alkalinity from a short-term factorial feeding experiment conducted independently of the main chronic alkalinity-enhancement exposure. The experiment tested whether the shellfish diet used to feed the oysters in the main experiment (Reed Mariculture SD1800, a concentrated microalgae feed) contributes to seawater total alkalinity, and whether this contribution depends on the presence of oysters. Four treatment combinations were run in parallel over a 9-day period (12 to 21 November 2024): unamended seawater without oysters or feed (control), seawater with food but without oysters (SD 1800), seawater with oysters but without feed (oysters) and seawater with both oysters and feed (oysters + SD 1800). Oysters in the unfed treatments were left entirely without feed for the full 9 days. Each treatment was sampled on six days (day 0, 1, 3, 5, 7 and 9) in triplicate. Seawater pH was measured with a pH electrode and total alkalinity by open-cell potentiometric titration, both on a Metrohm 855 Robotic Titrosampler.7.88894454.180327Helgoland, GermanyBundesamt für Naturschutzhttps://doi.org/10.13039/5011000104153522830300DEFINE2