Phytoplankton of the High-Latitude Arctic: Intensive Growth Large Diatoms Porosira glacialis in the Nansen Basin
In August 2020, during a dramatical summer retreat of sea ice in the Nansen Basin, a study of phytoplankton was conducted on the transect from two northern stations in the marginal ice zone (MIZ) (north of 83° N m and east of 38° E) through the open water to the southern station located in the Franz...
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ftmdpi:oai:mdpi.com:/2077-1312/11/2/453/ 2023-08-20T04:04:26+02:00 Phytoplankton of the High-Latitude Arctic: Intensive Growth Large Diatoms Porosira glacialis in the Nansen Basin Larisa Pautova Vladimir Silkin Marina Kravchishina Alexey Klyuvitkin Elena Kudryavtseva Dmitry Glukhovets Anna Chultsova Nadezhda Politova agris 2023-02-18 application/pdf https://doi.org/10.3390/jmse11020453 EN eng Multidisciplinary Digital Publishing Institute Marine Ecology https://dx.doi.org/10.3390/jmse11020453 https://creativecommons.org/licenses/by/4.0/ Journal of Marine Science and Engineering; Volume 11; Issue 2; Pages: 453 phytoplankton large diatoms marginal ice zone nutrients high-latitude Arctic Nansen Basin Text 2023 ftmdpi https://doi.org/10.3390/jmse11020453 2023-08-01T08:52:54Z In August 2020, during a dramatical summer retreat of sea ice in the Nansen Basin, a study of phytoplankton was conducted on the transect from two northern stations in the marginal ice zone (MIZ) (north of 83° N m and east of 38° E) through the open water to the southern station located in the Franz Victoria Trench. The presence of melted polar surface waters (mPSW), polar surface waters (PSW), and Atlantic waters (AW) were characteristic of the MIZ. There are only two water masses in open water, namely PSW and AW, at the southernmost station; the contribution of AW was minimal. In the MIZ, first-year and multiyear ice species and Atlantic species were noted; Atlantic species and first-year ice species were in open water, and only ice flora was at the southernmost station. The maximum phytoplankton biomass (30 g · m−3) was recorded at the northernmost station of the MIZ, and 99% of the phytoplankton consisted of a large diatom Porosira glacialis. Intensive growth of this species occurred on the subsurface halocline separating mPSW from PSW. A thermocline was formed in open water south of the MIZ towards the Franz Victoria Trench. A strong stratification decreases vertical nutrient fluxes, so phytoplankton biomass decreases significantly. Phytoplankton formed the maximum biomass in the thermocline. When moving south, biomass decreased and its minimum values were observed at the southernmost station where the influence of AW is minimal or completely absent. A transition from the silicon-limited state of phytoplankton (MIZ area) to nitrogen-limited (open water) was noted. Text Arctic Nansen Basin Phytoplankton Sea ice MDPI Open Access Publishing Arctic Journal of Marine Science and Engineering 11 2 453 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
phytoplankton large diatoms marginal ice zone nutrients high-latitude Arctic Nansen Basin |
spellingShingle |
phytoplankton large diatoms marginal ice zone nutrients high-latitude Arctic Nansen Basin Larisa Pautova Vladimir Silkin Marina Kravchishina Alexey Klyuvitkin Elena Kudryavtseva Dmitry Glukhovets Anna Chultsova Nadezhda Politova Phytoplankton of the High-Latitude Arctic: Intensive Growth Large Diatoms Porosira glacialis in the Nansen Basin |
topic_facet |
phytoplankton large diatoms marginal ice zone nutrients high-latitude Arctic Nansen Basin |
description |
In August 2020, during a dramatical summer retreat of sea ice in the Nansen Basin, a study of phytoplankton was conducted on the transect from two northern stations in the marginal ice zone (MIZ) (north of 83° N m and east of 38° E) through the open water to the southern station located in the Franz Victoria Trench. The presence of melted polar surface waters (mPSW), polar surface waters (PSW), and Atlantic waters (AW) were characteristic of the MIZ. There are only two water masses in open water, namely PSW and AW, at the southernmost station; the contribution of AW was minimal. In the MIZ, first-year and multiyear ice species and Atlantic species were noted; Atlantic species and first-year ice species were in open water, and only ice flora was at the southernmost station. The maximum phytoplankton biomass (30 g · m−3) was recorded at the northernmost station of the MIZ, and 99% of the phytoplankton consisted of a large diatom Porosira glacialis. Intensive growth of this species occurred on the subsurface halocline separating mPSW from PSW. A thermocline was formed in open water south of the MIZ towards the Franz Victoria Trench. A strong stratification decreases vertical nutrient fluxes, so phytoplankton biomass decreases significantly. Phytoplankton formed the maximum biomass in the thermocline. When moving south, biomass decreased and its minimum values were observed at the southernmost station where the influence of AW is minimal or completely absent. A transition from the silicon-limited state of phytoplankton (MIZ area) to nitrogen-limited (open water) was noted. |
format |
Text |
author |
Larisa Pautova Vladimir Silkin Marina Kravchishina Alexey Klyuvitkin Elena Kudryavtseva Dmitry Glukhovets Anna Chultsova Nadezhda Politova |
author_facet |
Larisa Pautova Vladimir Silkin Marina Kravchishina Alexey Klyuvitkin Elena Kudryavtseva Dmitry Glukhovets Anna Chultsova Nadezhda Politova |
author_sort |
Larisa Pautova |
title |
Phytoplankton of the High-Latitude Arctic: Intensive Growth Large Diatoms Porosira glacialis in the Nansen Basin |
title_short |
Phytoplankton of the High-Latitude Arctic: Intensive Growth Large Diatoms Porosira glacialis in the Nansen Basin |
title_full |
Phytoplankton of the High-Latitude Arctic: Intensive Growth Large Diatoms Porosira glacialis in the Nansen Basin |
title_fullStr |
Phytoplankton of the High-Latitude Arctic: Intensive Growth Large Diatoms Porosira glacialis in the Nansen Basin |
title_full_unstemmed |
Phytoplankton of the High-Latitude Arctic: Intensive Growth Large Diatoms Porosira glacialis in the Nansen Basin |
title_sort |
phytoplankton of the high-latitude arctic: intensive growth large diatoms porosira glacialis in the nansen basin |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2023 |
url |
https://doi.org/10.3390/jmse11020453 |
op_coverage |
agris |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Nansen Basin Phytoplankton Sea ice |
genre_facet |
Arctic Nansen Basin Phytoplankton Sea ice |
op_source |
Journal of Marine Science and Engineering; Volume 11; Issue 2; Pages: 453 |
op_relation |
Marine Ecology https://dx.doi.org/10.3390/jmse11020453 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/jmse11020453 |
container_title |
Journal of Marine Science and Engineering |
container_volume |
11 |
container_issue |
2 |
container_start_page |
453 |
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1774714810969096192 |