Dynamics of phytoplankton communities during late summer around the tip of the Antarctic Peninsula
The composition and distribution of phytoplankton assemblages around the tip of the Antarctic Peninsula were studied during two summer cruises (February/March 2008 and 2009). Water samples were collected for HPLC/CHEMTAX pigment and microscopic analysis. A great spatial variability in chlorophyll a...
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ftunivfurg:oai:repositorio.furg.br:1/3864 2023-11-12T04:03:11+01:00 Dynamics of phytoplankton communities during late summer around the tip of the Antarctic Peninsula Mendes, Carlos Rafael Borges Souza, Márcio Silva de Garcia, Virgínia Maria Tavano Leal, Miguel Costa Brotas, Vanda Costa Garcia, Carlos Alberto Eiras 2012 application/pdf http://repositorio.furg.br/handle/1/3864 https://doi.org/10.1016/j.dsr.2012.03.002 eng eng MENDES, Carlos Rafael Borges et al. Dynamics of phytoplankton communities during late summer around the tip of the Antarctic Peninsula. Science Direct, São Paulo, v. 65, n. 1, p.01-14, 2012. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0967063712000623>. Acesso em: 26 jul. 2012 http://repositorio.furg.br/handle/1/3864 doi:10.1016/j.dsr.2012.03.002 restrict access Antarctic Peninsula Phytoplankton Pigments HPLC CHEMTAX article 2012 ftunivfurg https://doi.org/10.1016/j.dsr.2012.03.002 2023-10-24T21:01:34Z The composition and distribution of phytoplankton assemblages around the tip of the Antarctic Peninsula were studied during two summer cruises (February/March 2008 and 2009). Water samples were collected for HPLC/CHEMTAX pigment and microscopic analysis. A great spatial variability in chlorophyll a (Chl a) was observed in the study area: highest levels in the vicinity of the James Ross Island (exceeding 7 mg m À 3 in 2009), intermediate values (0.5 to 2 mg m À 3) in the Bransfield Strait, and low concentrations in the Weddell Sea and Drake Passage (below 0.5 mg m À 3). Phytoplankton assemblages were generally dominated by diatoms, especially at coastal stations with high Chl a concentration, where diatom contribution was above 90% of total Chl a. Nanoflagellates, such as cryptophytes and/or Phaeocystis antarctica, replaced diatoms in open-ocean areas (e.g., Weddell Sea). Many species of peridinin-lacking autotrophic dinoflagellates (e.g., Gymnodinium spp.) were also important to total Chl a biomass at well- stratified stations of Bransfield Strait. Generally, water column structure was the most important environmental factor determining phytoplankton communities’ biomass and distribution. The HPLC pigment data also allowed the assessment of different physiological responses of phytoplankton to ambient light variation. The present study provides new insights about the dynamics of phytoplankton in an undersampled region of the Southern Ocean highly susceptible to global climate change. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Bransfield Strait Drake Passage James Ross Island Ross Island Southern Ocean Weddell Sea RI FURG (Repositório da Universidade Federal do Rio Grande) Antarctic Antarctic Peninsula Bransfield Strait Drake Passage Ross Island Southern Ocean The Antarctic Weddell Weddell Sea Deep Sea Research Part I: Oceanographic Research Papers 65 1 14 |
institution |
Open Polar |
collection |
RI FURG (Repositório da Universidade Federal do Rio Grande) |
op_collection_id |
ftunivfurg |
language |
English |
topic |
Antarctic Peninsula Phytoplankton Pigments HPLC CHEMTAX |
spellingShingle |
Antarctic Peninsula Phytoplankton Pigments HPLC CHEMTAX Mendes, Carlos Rafael Borges Souza, Márcio Silva de Garcia, Virgínia Maria Tavano Leal, Miguel Costa Brotas, Vanda Costa Garcia, Carlos Alberto Eiras Dynamics of phytoplankton communities during late summer around the tip of the Antarctic Peninsula |
topic_facet |
Antarctic Peninsula Phytoplankton Pigments HPLC CHEMTAX |
description |
The composition and distribution of phytoplankton assemblages around the tip of the Antarctic Peninsula were studied during two summer cruises (February/March 2008 and 2009). Water samples were collected for HPLC/CHEMTAX pigment and microscopic analysis. A great spatial variability in chlorophyll a (Chl a) was observed in the study area: highest levels in the vicinity of the James Ross Island (exceeding 7 mg m À 3 in 2009), intermediate values (0.5 to 2 mg m À 3) in the Bransfield Strait, and low concentrations in the Weddell Sea and Drake Passage (below 0.5 mg m À 3). Phytoplankton assemblages were generally dominated by diatoms, especially at coastal stations with high Chl a concentration, where diatom contribution was above 90% of total Chl a. Nanoflagellates, such as cryptophytes and/or Phaeocystis antarctica, replaced diatoms in open-ocean areas (e.g., Weddell Sea). Many species of peridinin-lacking autotrophic dinoflagellates (e.g., Gymnodinium spp.) were also important to total Chl a biomass at well- stratified stations of Bransfield Strait. Generally, water column structure was the most important environmental factor determining phytoplankton communities’ biomass and distribution. The HPLC pigment data also allowed the assessment of different physiological responses of phytoplankton to ambient light variation. The present study provides new insights about the dynamics of phytoplankton in an undersampled region of the Southern Ocean highly susceptible to global climate change. |
format |
Article in Journal/Newspaper |
author |
Mendes, Carlos Rafael Borges Souza, Márcio Silva de Garcia, Virgínia Maria Tavano Leal, Miguel Costa Brotas, Vanda Costa Garcia, Carlos Alberto Eiras |
author_facet |
Mendes, Carlos Rafael Borges Souza, Márcio Silva de Garcia, Virgínia Maria Tavano Leal, Miguel Costa Brotas, Vanda Costa Garcia, Carlos Alberto Eiras |
author_sort |
Mendes, Carlos Rafael Borges |
title |
Dynamics of phytoplankton communities during late summer around the tip of the Antarctic Peninsula |
title_short |
Dynamics of phytoplankton communities during late summer around the tip of the Antarctic Peninsula |
title_full |
Dynamics of phytoplankton communities during late summer around the tip of the Antarctic Peninsula |
title_fullStr |
Dynamics of phytoplankton communities during late summer around the tip of the Antarctic Peninsula |
title_full_unstemmed |
Dynamics of phytoplankton communities during late summer around the tip of the Antarctic Peninsula |
title_sort |
dynamics of phytoplankton communities during late summer around the tip of the antarctic peninsula |
publishDate |
2012 |
url |
http://repositorio.furg.br/handle/1/3864 https://doi.org/10.1016/j.dsr.2012.03.002 |
geographic |
Antarctic Antarctic Peninsula Bransfield Strait Drake Passage Ross Island Southern Ocean The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Antarctic Peninsula Bransfield Strait Drake Passage Ross Island Southern Ocean The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Bransfield Strait Drake Passage James Ross Island Ross Island Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Bransfield Strait Drake Passage James Ross Island Ross Island Southern Ocean Weddell Sea |
op_relation |
MENDES, Carlos Rafael Borges et al. Dynamics of phytoplankton communities during late summer around the tip of the Antarctic Peninsula. Science Direct, São Paulo, v. 65, n. 1, p.01-14, 2012. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0967063712000623>. Acesso em: 26 jul. 2012 http://repositorio.furg.br/handle/1/3864 doi:10.1016/j.dsr.2012.03.002 |
op_rights |
restrict access |
op_doi |
https://doi.org/10.1016/j.dsr.2012.03.002 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
65 |
container_start_page |
1 |
op_container_end_page |
14 |
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1782336422956498944 |