Phytoplankton types and primary production in the Argentine Sea

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...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Dogliotti, Ana Ines, Akselman, Rut
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:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01718630_v491_n_p15_Segura
http://hdl.handle.net/20.500.12110/paper_01718630_v491_n_p15_Segura
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_01718630_v491_n_p15_Segura
record_format dspace
spelling paper:paper_01718630_v491_n_p15_Segura2025-07-30T17:57:16Z Phytoplankton types and primary production in the Argentine Sea Dogliotti, Ana Ines Akselman, Rut 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 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. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01718630_v491_n_p15_Segura http://hdl.handle.net/20.500.12110/paper_01718630_v491_n_p15_Segura
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (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
Dogliotti, Ana Ines
Akselman, Rut
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.
author Dogliotti, Ana Ines
Akselman, Rut
author_facet Dogliotti, Ana Ines
Akselman, Rut
author_sort Dogliotti, Ana Ines
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 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01718630_v491_n_p15_Segura
http://hdl.handle.net/20.500.12110/paper_01718630_v491_n_p15_Segura
work_keys_str_mv AT dogliottianaines phytoplanktontypesandprimaryproductionintheargentinesea
AT akselmanrut phytoplanktontypesandprimaryproductionintheargentinesea
_version_ 1840323207985364992

Ejemplares similares