Seawater carbonate chemistry and diatom aggregation when exposed to crude oil and chemical dispersant ...

• Main Authors: Genzer, Jennifer L, Kamalanathan, Manoj, Bretherton, Laura, Hillhouse, Jessica, Xu, Chen, Santschi, Peter H, Quigg, Antonietta
• Format: Dataset
• Language: unknown
• Published: PANGAEA 2024
• Subjects: Bacillariophyta; Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria <20 L; Chromista; Laboratory experiment; Laboratory strains; Not applicable; Organic toxins; Other studied parameter or process; Pelagos; Phytoplankton; Primary production/Photosynthesis; Single species; Thalassiosira pseudonana; Type of study; Species, unique identification; Species, unique identification URI; Species, unique identification Semantic URI; Time point, descriptive; Growth phase; Treatment; Relative fluorescence intensity, ratio; Effective absorbance cross-section of photosystem II; Connectivity between photosystem II; Chlorophyll a; Cell density; Carbohydrates mass; Proteins; Transparent exopolymer particles as Gum Xanthan equivalents per volume; Polycyclic aromatic hydrocarbons; Polycyclic aromatic hydrocarbons, mass; Equivalent spherical diameter; Oil equivalent; pH; Alkalinity, total; Partial pressure of carbon dioxide water at sea surface temperature wet air; Carbon, inorganic, dissolved; Bicarbonate ion; Carbonate ion; Carbon dioxide; Area; Counts; Optical density; Aspect ratio; Settling time; Salinity; Temperature, water; Temperature, water, standard deviation; Carbonate system computation flag; Fugacity of carbon dioxide water at sea surface temperature wet air; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.965883; https://doi.pangaea.de/10.1594/PANGAEA.965883

Roller table experiments with Thalassiosira pseudonana, a small centric diatom, were conducted to produce marine snow aggregates in six treatments: Control (pCO2 = 400 ppm), OA (pCO2 = 750 ppm), water accommodated fraction of oil (WAF), OAWAF, diluted chemically enhanced WAF (DCEWAF), and OADCEWAF. Measurements included intracellular photophysiological responses, oil concentrations and polycyclic aromatic hydrocarbons (PAHs), aggregate morphology, transparent exopolymeric particles (TEP), and extracellular polymeric substances (EPS) to investigate if OA will affect the response to oil spill conditions. The experiments were conducted in the dark to eliminate cell replication and photosynthesis and used both stationary and exponential growth phases. ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2022) 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 2024-01-26. ...