Importance of nanophytoplankton biomass during summer 2019 in a retreating marine-terminating glacier-fjord system, Marian Cove, West Antarctica (62°S)
The biogeochemical dynamics of fjords around Antarctica are strongly influenced by cryospheric, climatic, and oceanographic processes that occur on a seasonal scale. Furthermore, as global climate change continues, there is a growing awareness of the impact of ocean warming on glacier melting, which...
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ftdoajarticles:oai:doaj.org/article:fbd1c5950fc24cd89fdaf0652cfbad0f 2024-02-04T09:54:13+01:00 Importance of nanophytoplankton biomass during summer 2019 in a retreating marine-terminating glacier-fjord system, Marian Cove, West Antarctica (62°S) Misa Jeon José Luis Iriarte Eun Jin Yang Jisoo Park Catharina Alves-de-Souza Sang Jong Park 2023-08-01T00:00:00Z https://doi.org/10.3389/fmars.2023.1174722 https://doaj.org/article/fbd1c5950fc24cd89fdaf0652cfbad0f EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2023.1174722/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2023.1174722 https://doaj.org/article/fbd1c5950fc24cd89fdaf0652cfbad0f Frontiers in Marine Science, Vol 10 (2023) glacial freshwater cell carbon biomass Antarctic shallow fjords diatoms nanophytoflagellates phytoplankton size fractions Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2023 ftdoajarticles https://doi.org/10.3389/fmars.2023.1174722 2024-01-07T01:35:41Z The biogeochemical dynamics of fjords around Antarctica are strongly influenced by cryospheric, climatic, and oceanographic processes that occur on a seasonal scale. Furthermore, as global climate change continues, there is a growing awareness of the impact of ocean warming on glacier melting, which is expected to affect the composition of phytoplankton community structure in West Antarctica’s nearshore marine areas. In this study, we describe the role of hydrographic forcing on the short-term summer variability of the phytoplankton community in Marian Cove, an Antarctic glacial fjord (62°S). Phytoplankton and hydrographic variables were measured at five stations along the Marian Cove during summer 2019 (January–February). The highest concentrations of microphytoplankton biomass were found in the outer area of the fjord, whereas nanophytoplankton biomass displayed continued dominance during most of the summer period in Marian Cove. Hydrographic assessment showed that freshwater inputs from the glacier influenced the surface layer of the fjord, modulating phytoplankton biomass, which was dominated by nanodiatoms (Minidiscus sp., Thalassiosira spp.) and nanophytoflagellates (Cryptomonas spp., Phaeocystis sp.). Concurrent measurement of phytoplankton biomass and environmental conditions during December 2018–January 2019 indicated that a period of weak southeastern winds generated vertical stability, which led to the development of a major peak of microphytoplankton biomass in the outer cove, driven by warm, allochthonous, oceanic, nutrient-rich waters. High carbon biomass dominated by nanodiatoms and nanophytoflagellates was observed in cold, fresh, and low-light subsurface waters of the cove. Our results highlight the effects of a warming ocean, which may favor the summer resurgence of nanodiatom and nanophytoflagellate communities in Antarctic fjords due to increased glacial meltwater inputs. Article in Journal/Newspaper Antarc* Antarctic Antarctica West Antarctica Directory of Open Access Journals: DOAJ Articles Antarctic Marian ENVELOPE(-58.750,-58.750,-62.217,-62.217) Marian Cove ENVELOPE(-58.800,-58.800,-62.217,-62.217) Outer Cove ENVELOPE(-56.515,-56.515,50.233,50.233) West Antarctica Frontiers in Marine Science 10 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
glacial freshwater cell carbon biomass Antarctic shallow fjords diatoms nanophytoflagellates phytoplankton size fractions Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
glacial freshwater cell carbon biomass Antarctic shallow fjords diatoms nanophytoflagellates phytoplankton size fractions Science Q General. Including nature conservation geographical distribution QH1-199.5 Misa Jeon José Luis Iriarte Eun Jin Yang Jisoo Park Catharina Alves-de-Souza Sang Jong Park Importance of nanophytoplankton biomass during summer 2019 in a retreating marine-terminating glacier-fjord system, Marian Cove, West Antarctica (62°S) |
topic_facet |
glacial freshwater cell carbon biomass Antarctic shallow fjords diatoms nanophytoflagellates phytoplankton size fractions Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
The biogeochemical dynamics of fjords around Antarctica are strongly influenced by cryospheric, climatic, and oceanographic processes that occur on a seasonal scale. Furthermore, as global climate change continues, there is a growing awareness of the impact of ocean warming on glacier melting, which is expected to affect the composition of phytoplankton community structure in West Antarctica’s nearshore marine areas. In this study, we describe the role of hydrographic forcing on the short-term summer variability of the phytoplankton community in Marian Cove, an Antarctic glacial fjord (62°S). Phytoplankton and hydrographic variables were measured at five stations along the Marian Cove during summer 2019 (January–February). The highest concentrations of microphytoplankton biomass were found in the outer area of the fjord, whereas nanophytoplankton biomass displayed continued dominance during most of the summer period in Marian Cove. Hydrographic assessment showed that freshwater inputs from the glacier influenced the surface layer of the fjord, modulating phytoplankton biomass, which was dominated by nanodiatoms (Minidiscus sp., Thalassiosira spp.) and nanophytoflagellates (Cryptomonas spp., Phaeocystis sp.). Concurrent measurement of phytoplankton biomass and environmental conditions during December 2018–January 2019 indicated that a period of weak southeastern winds generated vertical stability, which led to the development of a major peak of microphytoplankton biomass in the outer cove, driven by warm, allochthonous, oceanic, nutrient-rich waters. High carbon biomass dominated by nanodiatoms and nanophytoflagellates was observed in cold, fresh, and low-light subsurface waters of the cove. Our results highlight the effects of a warming ocean, which may favor the summer resurgence of nanodiatom and nanophytoflagellate communities in Antarctic fjords due to increased glacial meltwater inputs. |
format |
Article in Journal/Newspaper |
author |
Misa Jeon José Luis Iriarte Eun Jin Yang Jisoo Park Catharina Alves-de-Souza Sang Jong Park |
author_facet |
Misa Jeon José Luis Iriarte Eun Jin Yang Jisoo Park Catharina Alves-de-Souza Sang Jong Park |
author_sort |
Misa Jeon |
title |
Importance of nanophytoplankton biomass during summer 2019 in a retreating marine-terminating glacier-fjord system, Marian Cove, West Antarctica (62°S) |
title_short |
Importance of nanophytoplankton biomass during summer 2019 in a retreating marine-terminating glacier-fjord system, Marian Cove, West Antarctica (62°S) |
title_full |
Importance of nanophytoplankton biomass during summer 2019 in a retreating marine-terminating glacier-fjord system, Marian Cove, West Antarctica (62°S) |
title_fullStr |
Importance of nanophytoplankton biomass during summer 2019 in a retreating marine-terminating glacier-fjord system, Marian Cove, West Antarctica (62°S) |
title_full_unstemmed |
Importance of nanophytoplankton biomass during summer 2019 in a retreating marine-terminating glacier-fjord system, Marian Cove, West Antarctica (62°S) |
title_sort |
importance of nanophytoplankton biomass during summer 2019 in a retreating marine-terminating glacier-fjord system, marian cove, west antarctica (62°s) |
publisher |
Frontiers Media S.A. |
publishDate |
2023 |
url |
https://doi.org/10.3389/fmars.2023.1174722 https://doaj.org/article/fbd1c5950fc24cd89fdaf0652cfbad0f |
long_lat |
ENVELOPE(-58.750,-58.750,-62.217,-62.217) ENVELOPE(-58.800,-58.800,-62.217,-62.217) ENVELOPE(-56.515,-56.515,50.233,50.233) |
geographic |
Antarctic Marian Marian Cove Outer Cove West Antarctica |
geographic_facet |
Antarctic Marian Marian Cove Outer Cove West Antarctica |
genre |
Antarc* Antarctic Antarctica West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica West Antarctica |
op_source |
Frontiers in Marine Science, Vol 10 (2023) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2023.1174722/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2023.1174722 https://doaj.org/article/fbd1c5950fc24cd89fdaf0652cfbad0f |
op_doi |
https://doi.org/10.3389/fmars.2023.1174722 |
container_title |
Frontiers in Marine Science |
container_volume |
10 |
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1789971764008189952 |