Citation:

PANGAEA.961219

Name: KOSMOS 2020 Peru mesocosm study on ecosystem responses to different light and upwelling intensities: particulate organic matter concentrations of water samples
Published: 2023-11-02
Keywords: Field experiment; Humboldt Current System; light limitation; mesocosm study; particulate organic matter; POC; PON; POP; Upwelling

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Abstract:

This data is part of the BMBF project CUSCO (Coastal Upwelling Systems in a Changing Ocean). Here we report particulate organic matter concentrations 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 (150-1000 ml) were filtered onto a 0.7 µm pre-combusted glass-fiber filters (GFF, Whatman). The filters were acidified and then dried in the oven at 60 °C for 24 hours and total particulate carbon (TPC), particulate organic carbon (POC) and nitrogen (PON) content were measured using a CN analyzer (Euro EA3000, HEKAtech GmbH, Wegberg, Germany). POP filters were autoclaved for 30 min in 100 mL Schott Duran glass bottles using an oxidizing decomposition solution (Merck, catalogue no. 112936) to convert organic phosphate to orthophosphate. Phosphate concentrations were determined spectrophotometrically following Hansen and Koroleff (1999; doi:10.1002/9783527613984.ch10).

Keyword(s):

Field experiment; Humboldt Current System; light limitation; mesocosm study; particulate organic matter; POC; PON; POP; Upwelling

Project(s):

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)

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: 2020-04-02T00:00:00

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 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 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 Peru) * Method/Device: Mesocosm experiment (MESO)

Comment:

Mesocosm 10 describes the control sample from the Pacific

values marked with ? are questionable

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Type of study	Study type		Thielecke, Antonia
2	Event label	Event		Thielecke, Antonia
3	Mesocosm label	Meso label		Thielecke, Antonia		DW: sampling from deep water bag before the deep water was added to the mesocosms
4	DATE/TIME	Date/Time		Thielecke, Antonia		Geocode
5	Day of experiment	DOE	day	Thielecke, Antonia
6	Depth, water, experiment, top/minimum	Depth water exp top	m	Thielecke, Antonia
7	Depth, water, experiment, bottom/maximum	Depth water exp max	m	Thielecke, Antonia
8	Treatment: light condition	T:light		Thielecke, Antonia		summer-time high light (HL) and winter-time low light (LL)
9	Treatment	Treat		Thielecke, Antonia		upwelling intensity in %
10	Treatment	Treat		Thielecke, Antonia
11	Carbon, total, particulate	TPC	µmol/l	Thielecke, Antonia	Element analyser Euro EA3000
12	Carbon, organic, particulate	POC	µmol/l	Thielecke, Antonia	Element analyser Euro EA3000
13	Nitrogen, organic, particulate	PON	µmol/l	Thielecke, Antonia	Element analyser Euro EA3000
14	Phosphorus, organic, particulate	POP	µmol/l	Thielecke, Antonia	Spectrophotometer; according to Hansen & Koroleff (1999)
15	Carbon/Nitrogen ratio	C/N		Thielecke, Antonia
16	Carbon/Phosphorus ratio	C/P		Thielecke, Antonia
17	Nitrogen/Phosphorus ratio	N/P		Thielecke, Antonia

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

2576 data points

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