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Ortiz Cortes, Joaquin; González, Acorayda; Thielecke, Antonia; Arístegui, Javier (2023): KOSMOS 2020 Peru mesocosm study on ecosystem responses to different light and upwelling intensities: oxygen primary production rates of water samples [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.961218

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Abstract:
This data is part of the BMBF project CUSCO (Coastal Upwelling Systems in a Changing Ocean). Here we report oxygen primary production rates 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). Oxygen production as well as respiration rates were measured as described in Ortiz et al. (2022; doi:10.3389/fmars.2021.743105) using the Winkler method. For each mesocosm and sampling day samples for initial oxygen values fixed immediately after subsampling ("Initial"), dark incubations ("Dark") and light incubations ("Light") were measured. All samples were incubated with constant light dark/cycles and temperature was adjusted regularly to mesocosm values. After incubation samples were fixed and titrated by means of an automated, precise titration system with colorimetric end-point detection along with the initials (Dissolved Oxygen Analyzer, SIS Schwentinental, Germany). Community respiration (CR) was calculated as the oxygen consumption during dark incubation per hour. Net community production (NCP) was the oxygen production per hour in the light samples and gross production (GP) the sum of CR and NCP.
Keyword(s):
Field experiment; Humboldt Current System; light limitation; mesocosm study; oxygen consumption; primary production
Funding:
Federal Ministry of Education and Research (BMBF), grant/award no. 03F0813A: Küstennahe Auftriebsgebiete CUSCO: Auswirkungen geänderter Auftriebsintensitäten auf Struktur, Funktion und Produktivität pelagischer Nahrungsnetze im peruanischen Humboldt-Auftriebsgebiet
Horizon 2020 (H2020), grant/award no. 731065: Network of Leading European AQUAtic MesoCOSM Facilities Connecting Mountains to Oceans from the Arctic to the Mediterranean
Coverage:
Median Latitude: -12.055329 * Median Longitude: -77.235145 * South-bound Latitude: -12.056130 * West-bound Longitude: -77.235644 * North-bound Latitude: -12.054690 * East-bound Longitude: -77.234677
Date/Time Start: 2020-02-28T00:00:00 * Date/Time End: 2020-03-15T00:00:00
Event(s):
KOSMOS_2020_Mesocosm-M1 * Latitude: -12.054828 * Longitude: -77.235211 * Date/Time Start: 2020-02-28T00:00:00 * Date/Time End: 2020-04-02T00:00:00 * Campaign: KOSMOS_2020 (KOSMOS Peru) * Method/Device: Mesocosm experiment (MESO)
KOSMOS_2020_Mesocosm-M2 * Latitude: -12.054690 * Longitude: -77.234944 * Date/Time Start: 2020-02-28T00:00:00 * Date/Time End: 2020-04-02T00:00:00 * Campaign: KOSMOS_2020 (KOSMOS Peru) * Method/Device: Mesocosm experiment (MESO)
KOSMOS_2020_Mesocosm-M3 * Latitude: -12.054725 * Longitude: -77.234677 * Date/Time Start: 2020-02-28T00:00:00 * Date/Time End: 2020-04-02T00:00:00 * Campaign: KOSMOS_2020 (KOSMOS Peru) * Method/Device: Mesocosm experiment (MESO)
Comment:
Mesocosm 10 describes the control sample from the Pacific
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Type of studyStudy typeOrtiz Cortes, Joaquin
2Event labelEventOrtiz Cortes, Joaquin
3Mesocosm labelMeso labelOrtiz Cortes, Joaquin
4DATE/TIMEDate/TimeOrtiz Cortes, JoaquinGeocode
5Day of experimentDOEdayOrtiz Cortes, Joaquin
6Depth, water, experiment, top/minimumDepth water exp topmOrtiz Cortes, Joaquin
7Depth, water, experiment, bottom/maximumDepth water exp maxmOrtiz Cortes, Joaquin
8Treatment: light conditionT:lightOrtiz Cortes, Joaquinsummer-time high light (HL) and winter-time low light (LL)
9TreatmentTreatOrtiz Cortes, Joaquinupwelling intensity in %
10TreatmentTreatOrtiz Cortes, Joaquin
11Respiration rate, oxygen, communityComm resp O2µmol/l/hOrtiz Cortes, JoaquinTitration, Winkler
12Net community production of oxygenNCP O2µmol/l/hOrtiz Cortes, JoaquinTitration, Winkler
13Gross community production of oxygenGCP O2µmol/l/hOrtiz Cortes, JoaquinTitration, Winkler
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
972 data points

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