Microplanktonic diatom assemblages dominated the primary production but not the biomass in an Antarctic fjord
The western Antarctic Peninsula (WAP) fjords, currently threatened by climate change, are known as high krill congregation areas, however, the primary productivity in relation to phytoplankton groups in these coastal areas remains uncertain. To test this, we studied the specific composition, diversi...
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ftconicet:oai:ri.conicet.gov.ar:11336/152790 2023-10-09T21:47:13+02:00 Microplanktonic diatom assemblages dominated the primary production but not the biomass in an Antarctic fjord Mascioni, Martina Almandoz, Gaston Osvaldo Ekern, Lindsey Pan, B. Jack Vernet, Maria application/pdf http://hdl.handle.net/11336/152790 eng eng Elsevier Science info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0924796321001196 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmarsys.2021.103624 http://hdl.handle.net/11336/152790 Mascioni, Martina; Almandoz, Gaston Osvaldo; Ekern, Lindsey; Pan, B. Jack; Vernet, Maria; Microplanktonic diatom assemblages dominated the primary production but not the biomass in an Antarctic fjord; Elsevier Science; Journal of Marine Systems; 224; 12-2021; 1-17 0924-7963 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ Cryptophytes Odontella weissflogii Phytoplankton assemblages Carbon-to-chlorophyll a ratio Peridinin-lacking dinoflagellates https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1016/j.jmarsys.2021.103624 2023-09-24T19:44:38Z The western Antarctic Peninsula (WAP) fjords, currently threatened by climate change, are known as high krill congregation areas, however, the primary productivity in relation to phytoplankton groups in these coastal areas remains uncertain. To test this, we studied the specific composition, diversity and cellular carbon content of phytoplankton communities in relation to primary production (PP) and growth rates in Andvord Bay, its connection to Gerlache Strait and a near station on the continental shelf during spring (2015) and autumn (2016). Based on the microscopic determination of the relative biomass of the different microalgal taxa we determined three main phytoplankton assemblages that differ in their composition, PP, growth, and spatial and temporal distribution: (1) an assemblage dominated by cryptophytes, with high biomass (59.2 ± 28.2 μgC L−1), intermediate PP (63.1 ± 32 mgC m−3 d−1), and low growth (0.2 ± 1.1 d−1) present in the inner part of the fjord during spring, and related to higher surface water temperatures; (2) an assemblage dominated by micro- planktonic diatoms (mainly Odontella weissflogii) with intermediate biomass (40.1 ± 17.2 μgC L−1), high PP (151.2 ± 62.5 mgC m−3 d−1), and high growth (0.9 ± 1 d−1) present from the fjord mouth to the Gerlache Strait waters during spring and in shelf waters during autumn, related to high irradiance and microzooplankton biomass; and (3) an assemblage dominated by dinoflagellates, mainly small gymnodinioids (< 15 μm long), with low biomass (3.5 ± 3.5 μgC L−1), low PP (6.9 ± 5.1 mgC m−3 d−1), and intermediate growth (0.5 ± 0.6 d−1) present in the whole fjord and the Gerlache Strait during autumn and infrequently during spring, related to high meltwater fraction. During both seasons, the highest phytoplankton biomass, richness and productivity in Andvord Bay was located in a frontal area at the fjord?s mouth. Overall, the results of this study support the notion that WAP fjords are highly productive, highlighting the role of microplanktonic diatom as ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Andvord ENVELOPE(-62.616,-62.616,-64.833,-64.833) Andvord Bay ENVELOPE(-62.650,-62.650,-64.833,-64.833) Antarctic Antarctic Peninsula Gerlache ENVELOPE(99.033,99.033,-66.500,-66.500) Gerlache Strait ENVELOPE(-62.333,-62.333,-64.500,-64.500) Journal of Marine Systems 224 103624 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
Cryptophytes Odontella weissflogii Phytoplankton assemblages Carbon-to-chlorophyll a ratio Peridinin-lacking dinoflagellates https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
Cryptophytes Odontella weissflogii Phytoplankton assemblages Carbon-to-chlorophyll a ratio Peridinin-lacking dinoflagellates https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Mascioni, Martina Almandoz, Gaston Osvaldo Ekern, Lindsey Pan, B. Jack Vernet, Maria Microplanktonic diatom assemblages dominated the primary production but not the biomass in an Antarctic fjord |
topic_facet |
Cryptophytes Odontella weissflogii Phytoplankton assemblages Carbon-to-chlorophyll a ratio Peridinin-lacking dinoflagellates https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
The western Antarctic Peninsula (WAP) fjords, currently threatened by climate change, are known as high krill congregation areas, however, the primary productivity in relation to phytoplankton groups in these coastal areas remains uncertain. To test this, we studied the specific composition, diversity and cellular carbon content of phytoplankton communities in relation to primary production (PP) and growth rates in Andvord Bay, its connection to Gerlache Strait and a near station on the continental shelf during spring (2015) and autumn (2016). Based on the microscopic determination of the relative biomass of the different microalgal taxa we determined three main phytoplankton assemblages that differ in their composition, PP, growth, and spatial and temporal distribution: (1) an assemblage dominated by cryptophytes, with high biomass (59.2 ± 28.2 μgC L−1), intermediate PP (63.1 ± 32 mgC m−3 d−1), and low growth (0.2 ± 1.1 d−1) present in the inner part of the fjord during spring, and related to higher surface water temperatures; (2) an assemblage dominated by micro- planktonic diatoms (mainly Odontella weissflogii) with intermediate biomass (40.1 ± 17.2 μgC L−1), high PP (151.2 ± 62.5 mgC m−3 d−1), and high growth (0.9 ± 1 d−1) present from the fjord mouth to the Gerlache Strait waters during spring and in shelf waters during autumn, related to high irradiance and microzooplankton biomass; and (3) an assemblage dominated by dinoflagellates, mainly small gymnodinioids (< 15 μm long), with low biomass (3.5 ± 3.5 μgC L−1), low PP (6.9 ± 5.1 mgC m−3 d−1), and intermediate growth (0.5 ± 0.6 d−1) present in the whole fjord and the Gerlache Strait during autumn and infrequently during spring, related to high meltwater fraction. During both seasons, the highest phytoplankton biomass, richness and productivity in Andvord Bay was located in a frontal area at the fjord?s mouth. Overall, the results of this study support the notion that WAP fjords are highly productive, highlighting the role of microplanktonic diatom as ... |
format |
Article in Journal/Newspaper |
author |
Mascioni, Martina Almandoz, Gaston Osvaldo Ekern, Lindsey Pan, B. Jack Vernet, Maria |
author_facet |
Mascioni, Martina Almandoz, Gaston Osvaldo Ekern, Lindsey Pan, B. Jack Vernet, Maria |
author_sort |
Mascioni, Martina |
title |
Microplanktonic diatom assemblages dominated the primary production but not the biomass in an Antarctic fjord |
title_short |
Microplanktonic diatom assemblages dominated the primary production but not the biomass in an Antarctic fjord |
title_full |
Microplanktonic diatom assemblages dominated the primary production but not the biomass in an Antarctic fjord |
title_fullStr |
Microplanktonic diatom assemblages dominated the primary production but not the biomass in an Antarctic fjord |
title_full_unstemmed |
Microplanktonic diatom assemblages dominated the primary production but not the biomass in an Antarctic fjord |
title_sort |
microplanktonic diatom assemblages dominated the primary production but not the biomass in an antarctic fjord |
publisher |
Elsevier Science |
url |
http://hdl.handle.net/11336/152790 |
long_lat |
ENVELOPE(-62.616,-62.616,-64.833,-64.833) ENVELOPE(-62.650,-62.650,-64.833,-64.833) ENVELOPE(99.033,99.033,-66.500,-66.500) ENVELOPE(-62.333,-62.333,-64.500,-64.500) |
geographic |
Andvord Andvord Bay Antarctic Antarctic Peninsula Gerlache Gerlache Strait |
geographic_facet |
Andvord Andvord Bay Antarctic Antarctic Peninsula Gerlache Gerlache Strait |
genre |
Antarc* Antarctic Antarctic Peninsula |
genre_facet |
Antarc* Antarctic Antarctic Peninsula |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0924796321001196 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmarsys.2021.103624 http://hdl.handle.net/11336/152790 Mascioni, Martina; Almandoz, Gaston Osvaldo; Ekern, Lindsey; Pan, B. Jack; Vernet, Maria; Microplanktonic diatom assemblages dominated the primary production but not the biomass in an Antarctic fjord; Elsevier Science; Journal of Marine Systems; 224; 12-2021; 1-17 0924-7963 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1016/j.jmarsys.2021.103624 |
container_title |
Journal of Marine Systems |
container_volume |
224 |
container_start_page |
103624 |
_version_ |
1779310158160068608 |