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...
Published in: | Journal of Marine Science and Engineering |
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MDPI AG
2023
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ftdoajarticles:oai:doaj.org/article:19dcf60a2e0c49d9ac0491933b8e2f2f 2023-09-26T15:14:16+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 2023-08-01T00:00:00Z https://doi.org/10.3390/jmse11081573 https://doaj.org/article/19dcf60a2e0c49d9ac0491933b8e2f2f EN eng MDPI AG https://www.mdpi.com/2077-1312/11/8/1573 https://doaj.org/toc/2077-1312 doi:10.3390/jmse11081573 2077-1312 https://doaj.org/article/19dcf60a2e0c49d9ac0491933b8e2f2f Journal of Marine Science and Engineering, Vol 11, Iss 1573, p 1573 (2023) Arctic Laptev Sea bacterioplankton distribution particle-attached bacteria bacterial growth efficiency bacterial production Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 article 2023 ftdoajarticles https://doi.org/10.3390/jmse11081573 2023-08-27T00:35:24Z 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. Article in Journal/Newspaper Arctic khatanga laptev Laptev Sea Directory of Open Access Journals: DOAJ Articles 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 |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic Laptev Sea bacterioplankton distribution particle-attached bacteria bacterial growth efficiency bacterial production Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 |
spellingShingle |
Arctic Laptev Sea bacterioplankton distribution particle-attached bacteria bacterial growth efficiency bacterial production Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 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 Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 |
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 |
Article in Journal/Newspaper |
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 |
MDPI AG |
publishDate |
2023 |
url |
https://doi.org/10.3390/jmse11081573 https://doaj.org/article/19dcf60a2e0c49d9ac0491933b8e2f2f |
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, Vol 11, Iss 1573, p 1573 (2023) |
op_relation |
https://www.mdpi.com/2077-1312/11/8/1573 https://doaj.org/toc/2077-1312 doi:10.3390/jmse11081573 2077-1312 https://doaj.org/article/19dcf60a2e0c49d9ac0491933b8e2f2f |
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 |
_version_ |
1778135029480685568 |