KOSMOS 2020 Peru mesocosm study on ecosystem responses to different light and upwelling intensities: carbon and nitrogen uptake rates from water samples ...

• Main Authors: Thielecke, Antonia, Kittu, Leila, Fernández-Méndez, Mar, Georgieva, Silvia, Behncke, Jacqueline, Nachtigall, Kerstin, Hansen, Levka
• Format: Dataset
• Language: English
• Published: PANGAEA 2023
• Subjects: carbon uptake; Field experiment; Humboldt Current System; light limitation; mesocosm study; nutrient uptake; Peru; Upwelling; Type of study; Event label; Mesocosm label; DATE/TIME; Day of experiment; Depth, water, experiment, top/minimum; Depth, water, experiment, bottom/maximum; Treatment light condition; Treatment; Carbon, organic, particulate; Nitrogen, organic, particulate; Atom percent, 13C; Atom percent, 15N; Carbon uptake rate; Nitrogen uptake rate; Carbon/Nitrogen uptake ratio; Mesocosm experiment; Delta V Advantage Isotope Ratio Mass spectrometer with ConFlo IV interface ThermoFisher; Calculated; KOSMOS_2020; Coastal Upwelling System in a Changing Ocean CUSCO; Network of Leading European AQUAtic MesoCOSM Facilities Connecting Mountains to Oceans from the Arctic to the Mediterranean AQUACOSM; Phytoplankton
• Online Access: https://dx.doi.org/10.1594/pangaea.961202; https://doi.pangaea.de/10.1594/PANGAEA.961202

This data is part of the BMBF project CUSCO (Coastal Upwelling Systems in a Changing Ocean). Here we report carbon and nitrogen uptake rates by phytoplankton collected during a 35-day experiment where we enclosed natural plankton communities in in-situ mesocosms off Peru. The experiment investigated the interactive effects of light and upwelling on the Humboldt upwelling ecosystem by mimicking a gradient of upwelling intensities (0%, 15%, 30%, 45% and 60%) under summer-time high light and winter-time low light. Integrated seawater samples from a depth between 0 and 10m were collected using a 5L Integrating Water sampler (IWS; Hydro-Bios, Kiel). Samples were spiked with 13C labelled sodium bicarbonate and 15N labelled potassium nitrate. Samples were incubated for 24 hours at light intensities that resemble the light conditions in the mesocosms. After incubation a subsample (150-1000 ml) was filtered onto a 0.7 µm pre-combusted glass-fiber filters (GFF, Whatmann). The filters were acidified, then dried in the ... : Mesocosm 10 describes the control sample from the Pacific ...