Impact of Freshwater Discharge on the Carbon Uptake Rate of Phytoplankton During Summer (January–February 2019) in Marian Cove, King George Island, Antarctica

Rapidly changing conditions in high-latitude coastal systems can significantly impact biogeochemical cycles because these systems are strongly influenced by freshwater discharged from melting glaciers and streams on land. Generally, Antarctic coastal areas are considered high-productivity areas in w...

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Autores principales:	Bo Kyung Kim, Misa Jeon, Hyoung Min Joo, Tae-Wan Kim, Sang-Jong Park, Jisoo Park, Sun-Yong Ha
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	phytoplankton carbon uptake rate stable isotope Marian Cove Antarctica Science Q General. Including nature conservation, geographical distribution QH1-199.5
Acceso en línea:	https://doaj.org/article/de88db13316342a49730dce68e0ffab0
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spelling	oai:doaj.org-article:de88db13316342a49730dce68e0ffab02021-11-30T18:27:08ZImpact of Freshwater Discharge on the Carbon Uptake Rate of Phytoplankton During Summer (January–February 2019) in Marian Cove, King George Island, Antarctica2296-774510.3389/fmars.2021.725173https://doaj.org/article/de88db13316342a49730dce68e0ffab02021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fmars.2021.725173/fullhttps://doaj.org/toc/2296-7745Rapidly changing conditions in high-latitude coastal systems can significantly impact biogeochemical cycles because these systems are strongly influenced by freshwater discharged from melting glaciers and streams on land. Generally, Antarctic coastal areas are considered high-productivity areas in which phytoplankton growth prevails under various environmental conditions (e.g., oceanographic and meteorological conditions). This study provides carbon uptake rates of phytoplankton in Marian Cove during summer (January-February 2019). Daily depth-integrated carbon uptake varied greatly and averaged 0.8 g C m–2 day–1, with a maximum of 4.52 mg g C m–2 day–1 recorded on 14 January. Similarly, the observed biomass standing stocks were very high (up to 19.5 mg m–3 chlorophyll a) and were dominated by microphytoplankton (20–200 μm), representing 84% of total chlorophyll a (chl-a). The depth-integrated chl-a and carbon uptake decreased from outer to inner areas (close to the glacial front) in the cove. As the austral summer progressed, the freshening of the surface waters coincided with high water stability and suspended material and with low productivity when nanophytoplankton were present (2–20 μm; >60%). These findings suggest that both photosynthetically active radiation penetrating the water column and enhanced turbidity control light availability for phytoplankton, as well as their community compositions.Bo Kyung KimMisa JeonHyoung Min JooTae-Wan KimSang-Jong ParkJisoo ParkSun-Yong HaFrontiers Media S.A.articlephytoplanktoncarbon uptake ratestable isotopeMarian CoveAntarcticaScienceQGeneral. Including nature conservation, geographical distributionQH1-199.5ENFrontiers in Marine Science, Vol 8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	phytoplankton carbon uptake rate stable isotope Marian Cove Antarctica Science Q General. Including nature conservation, geographical distribution QH1-199.5
spellingShingle	phytoplankton carbon uptake rate stable isotope Marian Cove Antarctica Science Q General. Including nature conservation, geographical distribution QH1-199.5 Bo Kyung Kim Misa Jeon Hyoung Min Joo Tae-Wan Kim Sang-Jong Park Jisoo Park Sun-Yong Ha Impact of Freshwater Discharge on the Carbon Uptake Rate of Phytoplankton During Summer (January–February 2019) in Marian Cove, King George Island, Antarctica
description	Rapidly changing conditions in high-latitude coastal systems can significantly impact biogeochemical cycles because these systems are strongly influenced by freshwater discharged from melting glaciers and streams on land. Generally, Antarctic coastal areas are considered high-productivity areas in which phytoplankton growth prevails under various environmental conditions (e.g., oceanographic and meteorological conditions). This study provides carbon uptake rates of phytoplankton in Marian Cove during summer (January-February 2019). Daily depth-integrated carbon uptake varied greatly and averaged 0.8 g C m–2 day–1, with a maximum of 4.52 mg g C m–2 day–1 recorded on 14 January. Similarly, the observed biomass standing stocks were very high (up to 19.5 mg m–3 chlorophyll a) and were dominated by microphytoplankton (20–200 μm), representing 84% of total chlorophyll a (chl-a). The depth-integrated chl-a and carbon uptake decreased from outer to inner areas (close to the glacial front) in the cove. As the austral summer progressed, the freshening of the surface waters coincided with high water stability and suspended material and with low productivity when nanophytoplankton were present (2–20 μm; >60%). These findings suggest that both photosynthetically active radiation penetrating the water column and enhanced turbidity control light availability for phytoplankton, as well as their community compositions.
format	article
author	Bo Kyung Kim Misa Jeon Hyoung Min Joo Tae-Wan Kim Sang-Jong Park Jisoo Park Sun-Yong Ha
author_facet	Bo Kyung Kim Misa Jeon Hyoung Min Joo Tae-Wan Kim Sang-Jong Park Jisoo Park Sun-Yong Ha
author_sort	Bo Kyung Kim
title	Impact of Freshwater Discharge on the Carbon Uptake Rate of Phytoplankton During Summer (January–February 2019) in Marian Cove, King George Island, Antarctica
title_short	Impact of Freshwater Discharge on the Carbon Uptake Rate of Phytoplankton During Summer (January–February 2019) in Marian Cove, King George Island, Antarctica
title_full	Impact of Freshwater Discharge on the Carbon Uptake Rate of Phytoplankton During Summer (January–February 2019) in Marian Cove, King George Island, Antarctica
title_fullStr	Impact of Freshwater Discharge on the Carbon Uptake Rate of Phytoplankton During Summer (January–February 2019) in Marian Cove, King George Island, Antarctica
title_full_unstemmed	Impact of Freshwater Discharge on the Carbon Uptake Rate of Phytoplankton During Summer (January–February 2019) in Marian Cove, King George Island, Antarctica
title_sort	impact of freshwater discharge on the carbon uptake rate of phytoplankton during summer (january–february 2019) in marian cove, king george island, antarctica
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/de88db13316342a49730dce68e0ffab0
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Impact of Freshwater Discharge on the Carbon Uptake Rate of Phytoplankton During Summer (January–February 2019) in Marian Cove, King George Island, Antarctica

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