Corredor-Acosta, Andrea; Iriarte, Jose Luis (2023): Chlorophyll a, primary production and phytoplankton abundance off western Patagonia in Jan/Feb 2017 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.958284
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Published: 2023-06-15 • DOI registered: 2023-07-14
Abstract:
The dataset compiles in situ observational data obtained during the R/V Mirai MR16-09 cruise (2017-01-21 to 2017-02-03) off western Patagonia, Chile. The biological data provides information of primary production, total chlorophyll-a, as well as, phytoplankton species composition (abundance of diatoms and dinoflagellates). Water samples for total Chlorophyll-a and phytoplankton cell abundance were collected at the same sampling depths as nutrients. The total Chlorophyll-a was measured by filtering 280 mL of seawater at low vacuum pressure (<0.02 MPa) onto 25 mm Whatman GF/F filters. After filtration, phytoplankton pigments were immediately extracted in 7 mL of N,N-dimethylformamide and stored at -20°C until fluorometric analysis (Turner Design 10-AU-005). Quantification and taxonomical classification of the main dinoflagellates and diatoms taxa, were done using sub-samples in a 25 mL sedimentation chambers using an inverted microscope (CXK-41 Olympus). Diatoms and dinoflagellates were identified at species or genus level. Primary production rate was calculated using the equation proposed by Hama et al. (1983).
Keyword(s):
Supplement to:
Corredor-Acosta, Andrea; Galán, Alexander; Saldias, Gonzalo S; Mardones, Jorge I; Medellin-Mora, Johanna; Frangopulos, Máximo; Shiozaki, Takuhei; Harada, Naomi; Iriarte, Jose Luis (in prep.): Biogeochemical characteristics and phytoplankton composition off western Patagonia during the summer of 2017.
References:
Hama, T; Miyazaki, T; Ogawa, Y; Iwakuma, T; Takahashi, M; Otsuki, A; Ichimura, S (1983): Measurement of photosynthetic production of a marine phytoplankton population using a stable 13C isotope. Marine Biology, 73, 31-36, https://doi.org/10.1007/BF00396282
Funding:
Coverage:
Median Latitude: -49.640425 * Median Longitude: -76.195463 * South-bound Latitude: -54.336600 * West-bound Longitude: -79.113300 * North-bound Latitude: -44.295300 * East-bound Longitude: -74.633800
Date/Time Start: 2017-01-21T15:56:00 * Date/Time End: 2017-02-03T22:56:00
Minimum DEPTH, water: 10 m * Maximum DEPTH, water: 10 m
Event(s):
MR16-09_1 * Latitude: -44.295300 * Longitude: -75.592200 * Date/Time: 2017-01-21T15:56:00 * Campaign: MR16-09 * Basis: Mirai * Method/Device: CTD/Rosette (CTD-RO)
MR16-09_6 * Latitude: -46.180100 * Longitude: -76.294000 * Date/Time: 2017-01-24T04:51:00 * Campaign: MR16-09 * Basis: Mirai * Method/Device: CTD/Rosette (CTD-RO)
MR16-09_7 * Latitude: -47.799300 * Longitude: -76.033200 * Date/Time: 2017-01-28T10:42:00 * Campaign: MR16-09 * Basis: Mirai * Method/Device: CTD/Rosette (CTD-RO)
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
87 data points