Citation:

PANGAEA.958284

Name: Chlorophyll a, primary production and phytoplankton abundance off western Patagonia in Jan/Feb 2017
Published: 2023-06-15
License: https://creativecommons.org/licenses/by/4.0/
Keywords: diatoms abundance; dinoflagellates abundance; Dissolved oxygen; Macro-nutrients; particulate organic carbon (POC); Physical oceanographic data; Primary production; Western Patagonia Chile

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Published: 2023-06-15 • DOI registered: 2023-07-14

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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):

diatoms abundance; dinoflagellates abundance; Dissolved oxygen; Macro-nutrients; particulate organic carbon (POC); Physical oceanographic data; Primary production; Western Patagonia Chile

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:

Ministry of education, Chile (CONICYT), grant/award no. 15150003 : FONDAP

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: * Basis: Mirai * Method/Device: (CTD-RO)

MR16-09_6 * Latitude: -46.180100 * Longitude: -76.294000 * Date/Time: 2017-01-24T04:51:00 * Campaign: * Basis: Mirai * Method/Device: (CTD-RO)

MR16-09_7 * Latitude: -47.799300 * Longitude: -76.033200 * Date/Time: 2017-01-28T10:42:00 * Campaign: * Basis: Mirai * Method/Device: (CTD-RO)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Corredor-Acosta, Andrea
2	Station label	Station		Corredor-Acosta, Andrea
3	LATITUDE	Latitude		Corredor-Acosta, Andrea		Geocode
4	LONGITUDE	Longitude		Corredor-Acosta, Andrea		Geocode
5	Date/Time of event	Date/Time		Corredor-Acosta, Andrea
6	DEPTH, water	Depth water	m	Corredor-Acosta, Andrea		Geocode
7	Chlorophyll a	Chl a	mg/m³	Corredor-Acosta, Andrea	Fluorometry (TURNER, 10-AU-005)
8	Primary production of carbon	PP C	mg/m³/day	Corredor-Acosta, Andrea	Calculated according to Hama et al. (1983)
9	Diatoms, total	Diatom tot	#/l	Corredor-Acosta, Andrea	Inverted microscope, Olympus, CKX-41
10	Leptocylindrus spp.	Leptocylindrus spp.	#/l	Corredor-Acosta, Andrea	Inverted microscope, Olympus, CKX-41
11	Pseudo-nitzschia cf. australis	P-n cf. australis	#/l	Corredor-Acosta, Andrea	Inverted microscope, Olympus, CKX-41
12	Pseudo-nitzschia cf. pseudodelicatissima	P-n cf. pseudodelicatissima	#/l	Corredor-Acosta, Andrea	Inverted microscope, Olympus, CKX-41
13	Chaetoceros	Chaetoceros	#/l	Corredor-Acosta, Andrea	Inverted microscope, Olympus, CKX-41	and Thalassiosira
14	Dinoflagellates, total	Dinofl tot	#/l	Corredor-Acosta, Andrea	Inverted microscope, Olympus, CKX-41
15	Azadinium spp.	Azadinium spp.	#/l	Corredor-Acosta, Andrea	Inverted microscope, Olympus, CKX-41
16	Karenia spp.	Karenia spp.	#/l	Corredor-Acosta, Andrea	Inverted microscope, Olympus, CKX-41

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

87 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Event	2 Station	3 Latitude	4 Longitude	5 Date/Time	6 Depth water [m]	7 Chl a [mg/m³]	8 PP C [mg/m³/day]	9 Diatom tot [#/l]	10 Leptocylindrus spp. [#/l]	11 P-n cf. australis [#/l]	12 P-n cf. pseudodelicatissima [#/l]	13 Chaetoceros [#/l]	14 Dinofl tot [#/l]	15 Azadinium spp. [#/l]	16 Karenia spp. [#/l]
MR16-09_1	1	-44.2953	-75.5922	2017-01-21T15:56	10	2.12	60.51	99900	2700	2000	85200	1700	49400	25000	19400
MR16-09_6	6	-46.1801	-76.2940	2017-01-24T04:51	10	2.48	29.59	5200	0	0	2600	700	60300	35000	25000
MR16-09_7	7	-47.7993	-76.0332	2017-01-28T10:42	10	3.61	64.56	99700	31600	4800	13500	37900	69800	17000	45800
MR16-09_9	9	-48.3860	-76.4628	2017-01-29T15:48	10	1.30	26.53	17900	0	12000	1500	0	102300	77000	18000
MR16-09_10	10	-50.8068	-79.1133	2017-01-31T10:44	10	0.44	13.24	42400	0	0	14700	6700	9000	0	7500
MR16-09_11A	11A	-52.3180	-75.9452	2017-02-03T22:56	10	1.78		18800	0	2000	500	11200	62500	55000	7000
MR16-09_11B	11B	-53.0013	-75.4892	2017-02-03T06:24	10	0.76	16.80	45900	0	1200	10500	3500	53400	45000	7000
MR16-09_12B	12B	-54.3366	-74.6338	2017-02-02T12:52	10	0.83	24.81	3700	0	0	400	700	40000	40000	0