Ferronato, Carola; Guinder, Valeria A; Gilabert, Azul; Lopez-Abbate, Celeste; Nocera, Ariadna; Loizaga, Rocio; D'Agostino, Valeria (2024): Nano- and microplankton, chlorophyll a, b and c, and macronutrients from Ana Maria Gayoso cruise in the South western Atlantic during late spring 2021 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.971565 (DOI registration in progress)
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Abstract:
The abundance of protistan plankton (cell size > 5 µm), along with the concentrations of photosynthetic pigments and dissolved inorganic nutrients, was assessed in the Southwestern Atlantic (SWA, 36-48ºS, 64-54ºW). This study covered three regions: the outer Patagonian shelf, the slope waters in the core of the Malvinas Current, and the adjacent open ocean in the Argentine Basin. Water samples from surface (5 m depth) and subsurface (10-30 m depth, in the subsurface chlorophyll maxima) layers were collected using Niskin bottles during late spring (November 2021) on the Ana Maria Gayoso oceanographic cruise aboard the vessel Bernardo Houssay, totaling 10 sampling stations. Plankton samples were analyzed under an optical microscope using the inverted microscope technique with sedimentation chambers. Cells were enumerated and identified to the species, genus, or family level and subsequently categorized into taxonomic groups: diatoms, phototrophic (including mixotrophic) and heterotrophic dinoflagellates, coccolithophores, nanoflagellates, and ciliates. Cell biovolume was determined using geometric shapes, and carbon content was calculated using established carbon-to-volume values. The concentrations of chlorophyll a, b, and c, along with nitrite, nitrate, ammonium, phosphate, and silicate, were determined using a spectrophotometer. The region under study supports numerous commercially valuable fish species, highlighting the importance of documenting the physico-chemical factors influencing plankton biodiversity. These records are vital for understanding potential changes in population and community dynamics, which could subsequently impact the productivity of marine ecosystems.
Keyword(s):
Supplement to:
Ferronato, Carola; Guinder, Valeria A; Rivarossa, Martín; Saraceno, Martín; Ibarbalz, Federico; Tillmann, Urban; Almandoz, Gastón Osvaldo; Bourdin, Guillaume; D'Agostino, Valeria; Gilabert, Azul; Loizaga, Rocio; Lopez-Abbate, Celeste; Nocera, Ariadna; Silva, Ricardo; Flombaum, Pedro (submitted): Insights into protistan plankton blooms in the stirred Southwestern Atlantic Ocean. Journal of Geophysical Research: Oceans, 2024JC021412
References:
Hasle, G (1978): The inverted microscope method. In Sournia, A. (ed.), Phytoplankton Manual, Monographs on Oceanographic Methodology 6, UNESCO, Paris, 88-96
Hillebrand, Helmut; Dürselen, Claus-Dieter; Kirschtel, David; Pollingher, U; Zohary, Tamar (1999): Biovolume calculation for pelagic and benthic microalgae. Journal of Phycology, 35(2), 403-424, https://doi.org/10.1046/j.1529-8817.1999.3520403.x
Jeffrey, S W; Humphrey, G F (1975): New spectrophotometric equations for determining chlorophylls a, b, c1 and c2 in higher plants, algae and natural phytoplankton. Biochemie und Physiologie der Pflanzen, 167(2), 191-194, https://doi.org/10.1016/S0015-3796(17)30778-3
Menden-Deuer, Susanne; Lessard, Evelyn J (2000): Carbon to volume relationships for dinoflagellates, diatoms, and other protist plankton. Limnology and Oceanography, 45(3), 569-579, https://doi.org/10.4319/lo.2000.45.3.0569
Funding:
Horizon 2020 (H2020), grant/award no. 872690: Coastal ecosystem carbon balance in times of rapid glacier melt (CoastCarb)
Ministerio de Ciencia, Tecnología e Innovación, Argentina, grant/award no. PIDT_A6: BioMMAr from the national initiative Pampa Azul
National Scientific and Technical Research Council (CONICET), grant/award no. RESOL-2018-2686-APN-DIR#CONICET: CONICET Doctoral Fellowship
National Scientific and Technical Research Council (CONICET), grant/award no. RESOL-2021-722-APN-DIR#CONICET: CONICET-DAAD academic exchange project: FitoxNorPat (call-2020)
Coverage:
Median Latitude: -42.590000 * Median Longitude: -57.447000 * South-bound Latitude: -45.970000 * West-bound Longitude: -61.500000 * North-bound Latitude: -38.800000 * East-bound Longitude: -55.100000
Date/Time Start: 2021-11-16T11:46:00 * Date/Time End: 2021-11-22T13:46:00
Minimum DEPTH, water: 5 m * Maximum DEPTH, water: 40 m
Event(s):
GA_01 * Latitude Start: -45.969660 * Longitude Start: -61.498060 * Latitude End: -45.967920 * Longitude End: -61.497770 * Date/Time Start: 2021-11-16T11:46:00 * Date/Time End: 2021-11-16T11:59:00 * Elevation: -102.0 m * Campaign: Ana_Maria_Gayoso * Basis: Dr. Bernardo Houssay * Method/Device: CTD/Rosette (CTD-RO)
GA_05 * Latitude Start: -45.976590 * Longitude Start: -59.366520 * Latitude End: -45.978440 * Longitude End: -59.365360 * Date/Time Start: 2021-11-17T11:04:00 * Date/Time End: 2021-11-17T11:33:00 * Elevation: -399.0 m * Campaign: Ana_Maria_Gayoso * Basis: Dr. Bernardo Houssay * Method/Device: CTD/Rosette (CTD-RO)
GA_06 * Latitude Start: -44.985720 * Longitude Start: -56.610670 * Latitude End: -44.980260 * Longitude End: -56.601180 * Date/Time Start: 2021-11-18T10:43:00 * Date/Time End: 2021-11-18T11:08:00 * Campaign: Ana_Maria_Gayoso * Basis: Dr. Bernardo Houssay * Method/Device: CTD/Rosette (CTD-RO)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Ferronato, Carola | |||
| 2 | LATITUDE | Latitude | Ferronato, Carola | Geocode | ||
| 3 | LONGITUDE | Longitude | Ferronato, Carola | Geocode | ||
| 4 | Date/Time of event | Date/Time | Ferronato, Carola | |||
| 5 | DEPTH, water | Depth water | m | Ferronato, Carola | Geocode | |
| 6 | Diatoms | Diatoms | #/l | Ferronato, Carola | Phase contrast binocular microscope, Wild Heerbrugg, M20 | Single cells were counted following techniques of Utermöhl (1958) and Hasle (1978) under inverted microscopes using a magnification of 400 x. |
| 7 | Dinoflagellates, phototrophic | PDINO | #/l | Ferronato, Carola | Phase contrast binocular microscope, Wild Heerbrugg, M20 | Single cells were counted following techniques of Utermöhl (1958) and Hasle (1978) under inverted microscopes using a magnification of 400 x. |
| 8 | Dinoflagellates, heterotrophic | HDINO | #/l | Ferronato, Carola | Phase contrast binocular microscope, Wild Heerbrugg, M20 | Single cells were counted following techniques of Utermöhl (1958) and Hasle (1978) under inverted microscopes using a magnification of 400 x. |
| 9 | Nanoflagellates | Nanofl | #/l | Ferronato, Carola | Phase contrast binocular microscope, Wild Heerbrugg, M20 | Single cells were counted following techniques of Utermöhl (1958) and Hasle (1978) under inverted microscopes using a magnification of 400 x. |
| 10 | Coccolithophores | Coccolithophores | #/l | Ferronato, Carola | Phase contrast binocular microscope, Wild Heerbrugg, M20 | Single cells were counted following techniques of Utermöhl (1958) and Hasle (1978) under inverted microscopes using a magnification of 400 x. |
| 11 | Ciliates | Ciliates | #/l | Ferronato, Carola | Phase contrast binocular microscope, Wild Heerbrugg, M20 | Single cells were counted following techniques of Utermöhl (1958) and Hasle (1978) under inverted microscopes using a magnification of 400 x. |
| 12 | Chlorophyll a | Chl a | µg/l | Gilabert, Azul | UV-Vis spectrophotometer, Agilent, Cary 60 | A volume of 10 mL of 90% acetone was used for pigment extraction during 24 hours at 4°C in darkness. Chl-a, b and c concentrations were estimated using the equations developed by Jeffrey & Humphrey (1975). |
| 13 | Chlorophyll b | Chl b | µg/l | Gilabert, Azul | UV-Vis spectrophotometer, Agilent, Cary 60 | A volume of 10 mL of 90% acetone was used for pigment extraction during 24 hours at 4°C in darkness. Chl-a, b and c concentrations were estimated using the equations developed by Jeffrey & Humphrey (1975). |
| 14 | Chlorophyll c | Chl c | µg/l | Gilabert, Azul | UV-Vis spectrophotometer, Agilent, Cary 60 | A volume of 10 mL of 90% acetone was used for pigment extraction during 24 hours at 4°C in darkness. Chl-a, b and c concentrations were estimated using the equations developed by Jeffrey & Humphrey (1975). |
| 15 | Diatoms, biomass as carbon | Diatom C | µg/l | Ferronato, Carola | Calculated | Cell biovolume (μm³) was determined using geometric shapes and formulas described by Hillebrand et al. (1999). The cell carbon content (pg C/cell) was then derived from the biovolume using carbon-to-volume ratios established by Menden-Deuer and Lessard (2000). |
| 16 | Dinoflagellates, phototrophic, biomass as carbon | PDINO C | µg/l | Ferronato, Carola | Calculated | Cell biovolume (μm³) was determined using geometric shapes and formulas described by Hillebrand et al. (1999). The cell carbon content (pg C/cell) was then derived from the biovolume using carbon-to-volume ratios established by Menden-Deuer and Lessard (2000). |
| 17 | Dinoflagellates, heterotrophic, biomass as carbon | HDINO C | µg/l | Ferronato, Carola | Calculated | Cell biovolume (μm³) was determined using geometric shapes and formulas described by Hillebrand et al. (1999). The cell carbon content (pg C/cell) was then derived from the biovolume using carbon-to-volume ratios established by Menden-Deuer and Lessard (2000). |
| 18 | Nanoflagellates, biomass as carbon | Nanofl C | µg/l | Ferronato, Carola | Calculated | Cell biovolume (μm³) was determined using geometric shapes and formulas described by Hillebrand et al. (1999). The cell carbon content (pg C/cell) was then derived from the biovolume using carbon-to-volume ratios established by Menden-Deuer and Lessard (2000). |
| 19 | Coccolithophores, biomass as carbon | Coccolith C | µg/l | Ferronato, Carola | Calculated | Cell biovolume (μm³) was determined using geometric shapes and formulas described by Hillebrand et al. (1999). The cell carbon content (pg C/cell) was then derived from the biovolume using carbon-to-volume ratios established by Menden-Deuer and Lessard (2000). |
| 20 | Ciliates, biomass as carbon | Ciliates C | µg/l | Ferronato, Carola | Calculated | Cell biovolume (μm³) was determined using geometric shapes and formulas described by Hillebrand et al. (1999). The cell carbon content (pg C/cell) was then derived from the biovolume using carbon-to-volume ratios established by Menden-Deuer and Lessard (2000). |
| 21 | Silicate | Si(OH)4 | µmol/l | Gilabert, Azul | UV-Vis spectrophotometer, Agilent, Cary 60 | |
| 22 | Nitrite | [NO2]- | µmol/l | Gilabert, Azul | UV-Vis spectrophotometer, Agilent, Cary 60 | |
| 23 | Phosphate | [PO4]3- | µmol/l | Gilabert, Azul | UV-Vis spectrophotometer, Agilent, Cary 60 | |
| 24 | Nitrate | [NO3]- | µmol/l | Gilabert, Azul | UV-Vis spectrophotometer, Agilent, Cary 60 | |
| 25 | Ammonia | NH3 | µmol/l | Gilabert, Azul | UV-Vis spectrophotometer, Agilent, Cary 60 |
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:
400 data points