Contrasting two major Arctic coastal polynyas: the role of sea ice in driving diel vertical migrations of zooplankton in the Laptev and Beaufort Seas
The diel vertical migration (DVM) of zooplankton is one of the largest species migrations to occur globally and is a key driver of regional ecosystems and the marine carbon pump. Previously thought to be hampered by the extreme light regime prevailing in the Arctic Ocean, observations have revealed...
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Copernicus Publications
2024
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00074073 2024-06-23T07:49:45+00:00 Contrasting two major Arctic coastal polynyas: the role of sea ice in driving diel vertical migrations of zooplankton in the Laptev and Beaufort Seas Dmitrenko, Igor Petrusevich, Vladislav Preußer, Andreas Kosobokova, Ksenia Bouchard, Caroline Geoffroy, Maxime Komarov, Alexander Babb, David Kirillov, Sergei Barber, David 2024-06 electronic https://doi.org/10.5194/egusphere-2024-1637 https://noa.gwlb.de/receive/cop_mods_00074073 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00072205/egusphere-2024-1637.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2024-1637/egusphere-2024-1637.pdf eng eng Copernicus Publications https://doi.org/10.5194/egusphere-2024-1637 https://noa.gwlb.de/receive/cop_mods_00074073 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00072205/egusphere-2024-1637.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2024-1637/egusphere-2024-1637.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2024 ftnonlinearchiv https://doi.org/10.5194/egusphere-2024-1637 2024-06-10T23:38:39Z The diel vertical migration (DVM) of zooplankton is one of the largest species migrations to occur globally and is a key driver of regional ecosystems and the marine carbon pump. Previously thought to be hampered by the extreme light regime prevailing in the Arctic Ocean, observations have revealed that DVM does occur in ice-covered Arctic waters and suggest the decline in Arctic sea ice may thereby impact DVM and its role in the Arctic ecosystem. However, coastal polynyas present a unique environment where open water or thin, nearly translucent, ice prevail when offshore winds advect the ice pack away from the coast, allowing light into the surface waters and potentially disrupting DVM. Here, four yearlong time series of acoustic backscatter collected by moored acoustic Doppler current profilers at two opposite sides of the circumpolar polynya system at the Laptev Sea shelf (2007–08) and the Beaufort Sea shelf (2005–06) were used to examine the annual cycle of acoustic scattering, and therefore the annual cycle of DVM in these areas. The acoustic time series were used along with atmospheric and oceanic reanalysis and satellite data to interpret the results. Our observations show that DVM started to occur once the ice-free surface or under-ice layer irradiance exceeds a certain threshold (from ~0.3 to 3.3 lux), which is about two to ten times lower in the Beaufort Sea compared to the Laptev Sea. In the Laptev Sea, DVM does not occur during polar night, while civil twilight in the Beaufort Sea is sufficient to trigger DVM through polar night. This difference in DVM between the Laptev and Beaufort Seas is not entirely assigned to the 3° difference in latitude between the mooring positions, but also to the different light threshold required to trigger DVM, different zooplankton communities' composition, and potentially different depths and predation pressure. We find examples in both the Laptev and Beaufort Seas where the formation of polynyas and large leads caused DVM to abruptly cease or be disrupted, which we ... Article in Journal/Newspaper Arctic Arctic Ocean Beaufort Sea ice pack laptev Laptev Sea polar night Sea ice Zooplankton Niedersächsisches Online-Archiv NOA Arctic Arctic Ocean Laptev Sea |
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Niedersächsisches Online-Archiv NOA |
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English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Dmitrenko, Igor Petrusevich, Vladislav Preußer, Andreas Kosobokova, Ksenia Bouchard, Caroline Geoffroy, Maxime Komarov, Alexander Babb, David Kirillov, Sergei Barber, David Contrasting two major Arctic coastal polynyas: the role of sea ice in driving diel vertical migrations of zooplankton in the Laptev and Beaufort Seas |
topic_facet |
article Verlagsveröffentlichung |
description |
The diel vertical migration (DVM) of zooplankton is one of the largest species migrations to occur globally and is a key driver of regional ecosystems and the marine carbon pump. Previously thought to be hampered by the extreme light regime prevailing in the Arctic Ocean, observations have revealed that DVM does occur in ice-covered Arctic waters and suggest the decline in Arctic sea ice may thereby impact DVM and its role in the Arctic ecosystem. However, coastal polynyas present a unique environment where open water or thin, nearly translucent, ice prevail when offshore winds advect the ice pack away from the coast, allowing light into the surface waters and potentially disrupting DVM. Here, four yearlong time series of acoustic backscatter collected by moored acoustic Doppler current profilers at two opposite sides of the circumpolar polynya system at the Laptev Sea shelf (2007–08) and the Beaufort Sea shelf (2005–06) were used to examine the annual cycle of acoustic scattering, and therefore the annual cycle of DVM in these areas. The acoustic time series were used along with atmospheric and oceanic reanalysis and satellite data to interpret the results. Our observations show that DVM started to occur once the ice-free surface or under-ice layer irradiance exceeds a certain threshold (from ~0.3 to 3.3 lux), which is about two to ten times lower in the Beaufort Sea compared to the Laptev Sea. In the Laptev Sea, DVM does not occur during polar night, while civil twilight in the Beaufort Sea is sufficient to trigger DVM through polar night. This difference in DVM between the Laptev and Beaufort Seas is not entirely assigned to the 3° difference in latitude between the mooring positions, but also to the different light threshold required to trigger DVM, different zooplankton communities' composition, and potentially different depths and predation pressure. We find examples in both the Laptev and Beaufort Seas where the formation of polynyas and large leads caused DVM to abruptly cease or be disrupted, which we ... |
format |
Article in Journal/Newspaper |
author |
Dmitrenko, Igor Petrusevich, Vladislav Preußer, Andreas Kosobokova, Ksenia Bouchard, Caroline Geoffroy, Maxime Komarov, Alexander Babb, David Kirillov, Sergei Barber, David |
author_facet |
Dmitrenko, Igor Petrusevich, Vladislav Preußer, Andreas Kosobokova, Ksenia Bouchard, Caroline Geoffroy, Maxime Komarov, Alexander Babb, David Kirillov, Sergei Barber, David |
author_sort |
Dmitrenko, Igor |
title |
Contrasting two major Arctic coastal polynyas: the role of sea ice in driving diel vertical migrations of zooplankton in the Laptev and Beaufort Seas |
title_short |
Contrasting two major Arctic coastal polynyas: the role of sea ice in driving diel vertical migrations of zooplankton in the Laptev and Beaufort Seas |
title_full |
Contrasting two major Arctic coastal polynyas: the role of sea ice in driving diel vertical migrations of zooplankton in the Laptev and Beaufort Seas |
title_fullStr |
Contrasting two major Arctic coastal polynyas: the role of sea ice in driving diel vertical migrations of zooplankton in the Laptev and Beaufort Seas |
title_full_unstemmed |
Contrasting two major Arctic coastal polynyas: the role of sea ice in driving diel vertical migrations of zooplankton in the Laptev and Beaufort Seas |
title_sort |
contrasting two major arctic coastal polynyas: the role of sea ice in driving diel vertical migrations of zooplankton in the laptev and beaufort seas |
publisher |
Copernicus Publications |
publishDate |
2024 |
url |
https://doi.org/10.5194/egusphere-2024-1637 https://noa.gwlb.de/receive/cop_mods_00074073 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00072205/egusphere-2024-1637.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2024-1637/egusphere-2024-1637.pdf |
geographic |
Arctic Arctic Ocean Laptev Sea |
geographic_facet |
Arctic Arctic Ocean Laptev Sea |
genre |
Arctic Arctic Ocean Beaufort Sea ice pack laptev Laptev Sea polar night Sea ice Zooplankton |
genre_facet |
Arctic Arctic Ocean Beaufort Sea ice pack laptev Laptev Sea polar night Sea ice Zooplankton |
op_relation |
https://doi.org/10.5194/egusphere-2024-1637 https://noa.gwlb.de/receive/cop_mods_00074073 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00072205/egusphere-2024-1637.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2024-1637/egusphere-2024-1637.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/egusphere-2024-1637 |
_version_ |
1802640420551786496 |