Environmental drivers of phytoplankton taxonomic composition in an Antarctic fjord
The impact of ice-ocean interaction on the Southern Ocean is expected to intensify in the future. However, its influence on phytoplankton community composition remains an open question. The Antarctic Peninsula fjords offer an ideal system to understand the effect of ice-ocean forcing on phytoplankto...
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ftconicet:oai:ri.conicet.gov.ar:11336/136400 2023-10-09T21:46:47+02:00 Environmental drivers of phytoplankton taxonomic composition in an Antarctic fjord Pan, B. Jack Vernet, María Manck, Lauren Forsch, Kiefer Ekern, Lindsey Mascioni, Martina Barbeau, Katherine A. Almandoz, Gaston Osvaldo Orona, Alexander J. application/pdf http://hdl.handle.net/11336/136400 eng eng Pergamon-Elsevier Science Ltd info:eu-repo/semantics/altIdentifier/doi/10.1016/j.pocean.2020.102295 info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0079661120300343 http://hdl.handle.net/11336/136400 Pan, B. Jack; Vernet, María; Manck, Lauren; Forsch, Kiefer; Ekern, Lindsey; et al.; Environmental drivers of phytoplankton taxonomic composition in an Antarctic fjord; Pergamon-Elsevier Science Ltd; Progress In Oceanography; 183; 4-2020; 1-20 0079-6611 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ ANTARCTIC WATERS ICE MELTING MARINE ECOLOGY NUTRIENTS PHYTOPLANKTON WESTERN ANTARCTIC PENINSULA 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.pocean.2020.102295 2023-09-24T20:34:58Z The impact of ice-ocean interaction on the Southern Ocean is expected to intensify in the future. However, its influence on phytoplankton community composition remains an open question. The Antarctic Peninsula fjords offer an ideal system to understand the effect of ice-ocean forcing on phytoplankton community, providing an extreme in the spatial gradient from the glacio-marine boundary to the Western Antarctic Peninsula (WAP) continental shelf. During two cruises conducted in December 2015 and April 2016 in Andvord Bay, we found that glacial meltwater input altered surface salinity, promoting shallow mixed layers, and enriched surface waters in dissolved iron and nitrate. The three major groups of phytoplankton fueled by glacial input were: cryptophytes, diatoms, and a group of unidentified small flagellates. Prasinophytes and dinoflagellates were also present, in lower concentrations. In December, cryptophytes dominated the phytoplankton community and were correlated with relatively warmer temperatures in the surface layer; in addition, contrary to our hypothesis, no diatom bloom was observed in the fjord in spite of dissolved iron concentration >1 nM. By April, after the growth season, the overall phytoplankton abundance had decreased by an order of magnitude. Phytoplankton, in particular diatoms, were then limited by daytime length despite abundant macro-nutrient and iron concentrations. Mixed flagellates emerged as the dominant group during April due to the decline of other major taxa. Deep-learning algorithms for predicting the abundance of each major phytoplankton group captured the effects of these environmental factors on the phytoplankton community. Our results show that the fjord has relatively high phytoplankton biomass combined with high macro- and trace nutrient concentrations when compared to the broader WAP region. Based on this study, we confirm that flagellates can be the dominant taxon in Antarctic nearshore waters and we propose that iron concentration alone is insufficient to predict ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Southern Ocean 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 Southern Ocean The Antarctic Progress in Oceanography 183 102295 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
ANTARCTIC WATERS ICE MELTING MARINE ECOLOGY NUTRIENTS PHYTOPLANKTON WESTERN ANTARCTIC PENINSULA https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
ANTARCTIC WATERS ICE MELTING MARINE ECOLOGY NUTRIENTS PHYTOPLANKTON WESTERN ANTARCTIC PENINSULA https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Pan, B. Jack Vernet, María Manck, Lauren Forsch, Kiefer Ekern, Lindsey Mascioni, Martina Barbeau, Katherine A. Almandoz, Gaston Osvaldo Orona, Alexander J. Environmental drivers of phytoplankton taxonomic composition in an Antarctic fjord |
topic_facet |
ANTARCTIC WATERS ICE MELTING MARINE ECOLOGY NUTRIENTS PHYTOPLANKTON WESTERN ANTARCTIC PENINSULA https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
The impact of ice-ocean interaction on the Southern Ocean is expected to intensify in the future. However, its influence on phytoplankton community composition remains an open question. The Antarctic Peninsula fjords offer an ideal system to understand the effect of ice-ocean forcing on phytoplankton community, providing an extreme in the spatial gradient from the glacio-marine boundary to the Western Antarctic Peninsula (WAP) continental shelf. During two cruises conducted in December 2015 and April 2016 in Andvord Bay, we found that glacial meltwater input altered surface salinity, promoting shallow mixed layers, and enriched surface waters in dissolved iron and nitrate. The three major groups of phytoplankton fueled by glacial input were: cryptophytes, diatoms, and a group of unidentified small flagellates. Prasinophytes and dinoflagellates were also present, in lower concentrations. In December, cryptophytes dominated the phytoplankton community and were correlated with relatively warmer temperatures in the surface layer; in addition, contrary to our hypothesis, no diatom bloom was observed in the fjord in spite of dissolved iron concentration >1 nM. By April, after the growth season, the overall phytoplankton abundance had decreased by an order of magnitude. Phytoplankton, in particular diatoms, were then limited by daytime length despite abundant macro-nutrient and iron concentrations. Mixed flagellates emerged as the dominant group during April due to the decline of other major taxa. Deep-learning algorithms for predicting the abundance of each major phytoplankton group captured the effects of these environmental factors on the phytoplankton community. Our results show that the fjord has relatively high phytoplankton biomass combined with high macro- and trace nutrient concentrations when compared to the broader WAP region. Based on this study, we confirm that flagellates can be the dominant taxon in Antarctic nearshore waters and we propose that iron concentration alone is insufficient to predict ... |
format |
Article in Journal/Newspaper |
author |
Pan, B. Jack Vernet, María Manck, Lauren Forsch, Kiefer Ekern, Lindsey Mascioni, Martina Barbeau, Katherine A. Almandoz, Gaston Osvaldo Orona, Alexander J. |
author_facet |
Pan, B. Jack Vernet, María Manck, Lauren Forsch, Kiefer Ekern, Lindsey Mascioni, Martina Barbeau, Katherine A. Almandoz, Gaston Osvaldo Orona, Alexander J. |
author_sort |
Pan, B. Jack |
title |
Environmental drivers of phytoplankton taxonomic composition in an Antarctic fjord |
title_short |
Environmental drivers of phytoplankton taxonomic composition in an Antarctic fjord |
title_full |
Environmental drivers of phytoplankton taxonomic composition in an Antarctic fjord |
title_fullStr |
Environmental drivers of phytoplankton taxonomic composition in an Antarctic fjord |
title_full_unstemmed |
Environmental drivers of phytoplankton taxonomic composition in an Antarctic fjord |
title_sort |
environmental drivers of phytoplankton taxonomic composition in an antarctic fjord |
publisher |
Pergamon-Elsevier Science Ltd |
url |
http://hdl.handle.net/11336/136400 |
long_lat |
ENVELOPE(-62.616,-62.616,-64.833,-64.833) ENVELOPE(-62.650,-62.650,-64.833,-64.833) |
geographic |
Andvord Andvord Bay Antarctic Antarctic Peninsula Southern Ocean The Antarctic |
geographic_facet |
Andvord Andvord Bay Antarctic Antarctic Peninsula Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Southern Ocean |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.pocean.2020.102295 info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0079661120300343 http://hdl.handle.net/11336/136400 Pan, B. Jack; Vernet, María; Manck, Lauren; Forsch, Kiefer; Ekern, Lindsey; et al.; Environmental drivers of phytoplankton taxonomic composition in an Antarctic fjord; Pergamon-Elsevier Science Ltd; Progress In Oceanography; 183; 4-2020; 1-20 0079-6611 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.pocean.2020.102295 |
container_title |
Progress in Oceanography |
container_volume |
183 |
container_start_page |
102295 |
_version_ |
1779309314863792128 |