Description: 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.
Global identifier:
Doi(
"10.1594/PANGAEA.996217",
)
DataMeasurements(
DataMeasurements {
domain: Unspecified,
station: None,
measured_variables: [
"Alkalinity, total",
"Event label",
"Experiment day",
"Replicates",
"Sampling date/time, experiment",
"Treatment",
"Type of study",
"pH",
],
methods: [],
},
)
Tags: Europäische Auster ? Auster ? Röhricht ? Meerwasser ? Futtermittel ? Mikroalgen ? Schilf ? Marikultur ? Studie ? Lebensmittelüberwachung ? ecotoxicology ? ocean alkalinity enhancement ?
Region: Helgoland, Germany
Bounding boxes: 7.888944° .. 7.888944° x 54.180327° .. 54.180327°
License: Creative Commons Namensnennung 4.0 (Data access requires registration)
Language: Englisch/English
Issued: 2026-07-29
Modified: 2026-07-29
Last harvest: 13.08.2026 02:15
Time ranges: 2024-04-17 - 2025-03-12
Accessed 1 times.