Phytoplankton types and primary production in the Argentine Sea

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Several satellite models classify phytoplankton functional types (PFT) based on cell size. In this study we used field data from the Argentine Sea on both the photosynthetic and the bio-optical properties of phytoplankton to distinguish photosynthetic and bio-optical phytoplankton types (PBPT). Clus...

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Autores principales: Segura, V., Lutz, V.A., Dogliotti, A., Silva, R.I., Negri, R.M., Akselman, R., Benavides, H.
Formato: Artículo publishedVersion
Publicado: 2013
Materias:
Argentine sea
Cell size
Photosynthetic and bio-optical phytoplankton types
Phytoplankton functional types
Primary production
chlorophyll a
coccolith
community composition
environmental conditions
functional group
photosynthesis
phytoplankton
primary production
satellite imagery
taxonomy
Argentine Sea
Atlantic Ocean
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01718630_v491_n_p15_Segura
https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_01718630_v491_n_p15_Segura_oai
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Repositorio Digital de la Universidad de Buenos Aires (UBA) de Universidad de Buenos Aires
id I28-R145-paper_01718630_v491_n_p15_Segura_oai
record_format dspace
spelling I28-R145-paper_01718630_v491_n_p15_Segura_oai2024-08-16 Segura, V. Lutz, V.A. Dogliotti, A. Silva, R.I. Negri, R.M. Akselman, R. Benavides, H. 2013 Several satellite models classify phytoplankton functional types (PFT) based on cell size. In this study we used field data from the Argentine Sea on both the photosynthetic and the bio-optical properties of phytoplankton to distinguish photosynthetic and bio-optical phytoplankton types (PBPT). Cluster analyses were run using data from 70 stations sampled during 3 periods to distinguish different PBPT, and principal component analysis was used to describe them. We examined the main taxonomic composition and percentage of chl a in the <5 μm size fraction found within the PBPT. The distribution of PBPT in relation to hourly primary production and environmental conditions was also investigated. The results showed a high degree of variability in biooptical and photosynthetic properties, e.g. the specific absorption coefficient of phytoplankton, aB ph(440), varied between 0.015 and 0.067 m2 (mg chl a)-1, and the maximum production at light saturation, PB m, varied between 0.68 and 10.05 mg C (mg chl a)-1 h-1. This resulted in the discrimination of 11 PBPT. Some had similar average cell sizes but differed in their bio-optical or photosynthetic characteristics, e.g. PBPT1 (with diatoms <5 μm and Emiliania huxleyi 2-5 μm) and PBPT6 (with diatoms <5 μm and coccal cells ∼2 μm) had markedly different PB m values (PBPT1: 1.20 mg C (mg chl a)-1 h-1 and PBPT6: 6.71 mg C (mg chl a)-1 h-1). This variability in the bio-optical and physiological properties is most likely the result of adaptation by phytoplankton communities to the high heterogeneity in environmental conditions in this region. These results indicate that satellite models describing the distribution of PFT based on cell size alone will not provide a realistic representation of the phytoplankton composition in this highly productive and heterogeneous area. © 2013 The authors. Fil:Dogliotti, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Akselman, R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. application/pdf http://hdl.handle.net/20.500.12110/paper_01718630_v491_n_p15_Segura info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Mar. Ecol. Prog. Ser. 2013;491:15-31 Argentine sea Cell size Photosynthetic and bio-optical phytoplankton types Phytoplankton functional types Primary production chlorophyll a coccolith community composition environmental conditions functional group photosynthesis phytoplankton primary production satellite imagery taxonomy Argentine Sea Atlantic Ocean Phytoplankton types and primary production in the Argentine Sea info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_01718630_v491_n_p15_Segura_oai
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-145
collection Repositorio Digital de la Universidad de Buenos Aires (UBA)
topic Argentine sea
Cell size
Photosynthetic and bio-optical phytoplankton types
Phytoplankton functional types
Primary production
chlorophyll a
coccolith
community composition
environmental conditions
functional group
photosynthesis
phytoplankton
primary production
satellite imagery
taxonomy
Argentine Sea
Atlantic Ocean
spellingShingle Argentine sea
Cell size
Photosynthetic and bio-optical phytoplankton types
Phytoplankton functional types
Primary production
chlorophyll a
coccolith
community composition
environmental conditions
functional group
photosynthesis
phytoplankton
primary production
satellite imagery
taxonomy
Argentine Sea
Atlantic Ocean
Segura, V.
Lutz, V.A.
Dogliotti, A.
Silva, R.I.
Negri, R.M.
Akselman, R.
Benavides, H.
Phytoplankton types and primary production in the Argentine Sea
topic_facet Argentine sea
Cell size
Photosynthetic and bio-optical phytoplankton types
Phytoplankton functional types
Primary production
chlorophyll a
coccolith
community composition
environmental conditions
functional group
photosynthesis
phytoplankton
primary production
satellite imagery
taxonomy
Argentine Sea
Atlantic Ocean
description Several satellite models classify phytoplankton functional types (PFT) based on cell size. In this study we used field data from the Argentine Sea on both the photosynthetic and the bio-optical properties of phytoplankton to distinguish photosynthetic and bio-optical phytoplankton types (PBPT). Cluster analyses were run using data from 70 stations sampled during 3 periods to distinguish different PBPT, and principal component analysis was used to describe them. We examined the main taxonomic composition and percentage of chl a in the <5 μm size fraction found within the PBPT. The distribution of PBPT in relation to hourly primary production and environmental conditions was also investigated. The results showed a high degree of variability in biooptical and photosynthetic properties, e.g. the specific absorption coefficient of phytoplankton, aB ph(440), varied between 0.015 and 0.067 m2 (mg chl a)-1, and the maximum production at light saturation, PB m, varied between 0.68 and 10.05 mg C (mg chl a)-1 h-1. This resulted in the discrimination of 11 PBPT. Some had similar average cell sizes but differed in their bio-optical or photosynthetic characteristics, e.g. PBPT1 (with diatoms <5 μm and Emiliania huxleyi 2-5 μm) and PBPT6 (with diatoms <5 μm and coccal cells ∼2 μm) had markedly different PB m values (PBPT1: 1.20 mg C (mg chl a)-1 h-1 and PBPT6: 6.71 mg C (mg chl a)-1 h-1). This variability in the bio-optical and physiological properties is most likely the result of adaptation by phytoplankton communities to the high heterogeneity in environmental conditions in this region. These results indicate that satellite models describing the distribution of PFT based on cell size alone will not provide a realistic representation of the phytoplankton composition in this highly productive and heterogeneous area. © 2013 The authors.
format Artículo
Artículo
publishedVersion
author Segura, V.
Lutz, V.A.
Dogliotti, A.
Silva, R.I.
Negri, R.M.
Akselman, R.
Benavides, H.
author_facet Segura, V.
Lutz, V.A.
Dogliotti, A.
Silva, R.I.
Negri, R.M.
Akselman, R.
Benavides, H.
author_sort Segura, V.
title Phytoplankton types and primary production in the Argentine Sea
title_short Phytoplankton types and primary production in the Argentine Sea
title_full Phytoplankton types and primary production in the Argentine Sea
title_fullStr Phytoplankton types and primary production in the Argentine Sea
title_full_unstemmed Phytoplankton types and primary production in the Argentine Sea
title_sort phytoplankton types and primary production in the argentine sea
publishDate 2013
url http://hdl.handle.net/20.500.12110/paper_01718630_v491_n_p15_Segura
https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_01718630_v491_n_p15_Segura_oai
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AT akselmanr phytoplanktontypesandprimaryproductionintheargentinesea
AT benavidesh phytoplanktontypesandprimaryproductionintheargentinesea
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