Abundance, Biomass, and Production of Bacterioplankton at the End of the Growing Season in the Western Laptev Sea: Impact of Khatanga River Discharge (Arctic)
The structure and productivity of planktonic microbial communities in the ecosystems of the Siberian Arctic seas are significantly dependent on freshwater input. During the study, we determined the spatial distribution of the abundance, biomass, and production of heterotrophic bacterioplankton in th...
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ftmdpi:oai:mdpi.com:/2077-1312/11/8/1573/ 2023-09-05T13:17:00+02:00 Abundance, Biomass, and Production of Bacterioplankton at the End of the Growing Season in the Western Laptev Sea: Impact of Khatanga River Discharge (Arctic) Alexander I. Kopylov Dmitriy B. Kosolapov Anna V. Romanenko Elena A. Zabotkina Andrey F. Sazhin agris 2023-08-10 application/pdf https://doi.org/10.3390/jmse11081573 EN eng Multidisciplinary Digital Publishing Institute Marine Biology https://dx.doi.org/10.3390/jmse11081573 https://creativecommons.org/licenses/by/4.0/ Journal of Marine Science and Engineering; Volume 11; Issue 8; Pages: 1573 Arctic Laptev Sea bacterioplankton distribution particle-attached bacteria bacterial growth efficiency bacterial production Text 2023 ftmdpi https://doi.org/10.3390/jmse11081573 2023-08-13T23:52:47Z The structure and productivity of planktonic microbial communities in the ecosystems of the Siberian Arctic seas are significantly dependent on freshwater input. During the study, we determined the spatial distribution of the abundance, biomass, and production of heterotrophic bacterioplankton in the Western Laptev Sea on the transect from the Khatanga River estuary to the continental slope and assessed the impact of river freshwater discharge. The influence of fresh water on bacterioplankton was restricted mainly to Khatanga Bay (KHAB) and the transitional zone (TZ) and was poorly recognized in the Western shelf (WS) and continental slope (CS) areas. The total bacterial abundance decreased from KHAB to the CS. Particle-attached bacteria constituted on average 63.0% of the total abundance of bacterioplankton in KHAB and 1.0% at the CS. Average bacterial production in the water column was highest in KHAB (10.3 mg C m−3 d−1), decreasing towards the CS (0.7 mg C m−3 d−1). In KHAB and TZ, bacteria were the main component of the planktonic community (44−55%). These results show that at the end of the growing season, bacterial processes prevailed over autotrophic ones and contributed largely to the total biological carbon flux in the coastal ecosystem of the Western Laptev Sea. Text Arctic khatanga laptev Laptev Sea MDPI Open Access Publishing Arctic Laptev Sea Western Shelf ENVELOPE(164.448,164.448,-77.780,-77.780) Journal of Marine Science and Engineering 11 8 1573 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
Arctic Laptev Sea bacterioplankton distribution particle-attached bacteria bacterial growth efficiency bacterial production |
spellingShingle |
Arctic Laptev Sea bacterioplankton distribution particle-attached bacteria bacterial growth efficiency bacterial production Alexander I. Kopylov Dmitriy B. Kosolapov Anna V. Romanenko Elena A. Zabotkina Andrey F. Sazhin Abundance, Biomass, and Production of Bacterioplankton at the End of the Growing Season in the Western Laptev Sea: Impact of Khatanga River Discharge (Arctic) |
topic_facet |
Arctic Laptev Sea bacterioplankton distribution particle-attached bacteria bacterial growth efficiency bacterial production |
description |
The structure and productivity of planktonic microbial communities in the ecosystems of the Siberian Arctic seas are significantly dependent on freshwater input. During the study, we determined the spatial distribution of the abundance, biomass, and production of heterotrophic bacterioplankton in the Western Laptev Sea on the transect from the Khatanga River estuary to the continental slope and assessed the impact of river freshwater discharge. The influence of fresh water on bacterioplankton was restricted mainly to Khatanga Bay (KHAB) and the transitional zone (TZ) and was poorly recognized in the Western shelf (WS) and continental slope (CS) areas. The total bacterial abundance decreased from KHAB to the CS. Particle-attached bacteria constituted on average 63.0% of the total abundance of bacterioplankton in KHAB and 1.0% at the CS. Average bacterial production in the water column was highest in KHAB (10.3 mg C m−3 d−1), decreasing towards the CS (0.7 mg C m−3 d−1). In KHAB and TZ, bacteria were the main component of the planktonic community (44−55%). These results show that at the end of the growing season, bacterial processes prevailed over autotrophic ones and contributed largely to the total biological carbon flux in the coastal ecosystem of the Western Laptev Sea. |
format |
Text |
author |
Alexander I. Kopylov Dmitriy B. Kosolapov Anna V. Romanenko Elena A. Zabotkina Andrey F. Sazhin |
author_facet |
Alexander I. Kopylov Dmitriy B. Kosolapov Anna V. Romanenko Elena A. Zabotkina Andrey F. Sazhin |
author_sort |
Alexander I. Kopylov |
title |
Abundance, Biomass, and Production of Bacterioplankton at the End of the Growing Season in the Western Laptev Sea: Impact of Khatanga River Discharge (Arctic) |
title_short |
Abundance, Biomass, and Production of Bacterioplankton at the End of the Growing Season in the Western Laptev Sea: Impact of Khatanga River Discharge (Arctic) |
title_full |
Abundance, Biomass, and Production of Bacterioplankton at the End of the Growing Season in the Western Laptev Sea: Impact of Khatanga River Discharge (Arctic) |
title_fullStr |
Abundance, Biomass, and Production of Bacterioplankton at the End of the Growing Season in the Western Laptev Sea: Impact of Khatanga River Discharge (Arctic) |
title_full_unstemmed |
Abundance, Biomass, and Production of Bacterioplankton at the End of the Growing Season in the Western Laptev Sea: Impact of Khatanga River Discharge (Arctic) |
title_sort |
abundance, biomass, and production of bacterioplankton at the end of the growing season in the western laptev sea: impact of khatanga river discharge (arctic) |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2023 |
url |
https://doi.org/10.3390/jmse11081573 |
op_coverage |
agris |
long_lat |
ENVELOPE(164.448,164.448,-77.780,-77.780) |
geographic |
Arctic Laptev Sea Western Shelf |
geographic_facet |
Arctic Laptev Sea Western Shelf |
genre |
Arctic khatanga laptev Laptev Sea |
genre_facet |
Arctic khatanga laptev Laptev Sea |
op_source |
Journal of Marine Science and Engineering; Volume 11; Issue 8; Pages: 1573 |
op_relation |
Marine Biology https://dx.doi.org/10.3390/jmse11081573 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/jmse11081573 |
container_title |
Journal of Marine Science and Engineering |
container_volume |
11 |
container_issue |
8 |
container_start_page |
1573 |
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1776198360792825856 |