Biomarker evidence of the water mass structure and primary productivity changes in the Chukchi Sea over the past 70 years
The Chukchi Sea has experienced significant changes under global warming in the Common Era, including the shift of primary productivity. However, modern observations are too short to fully investigate the effects of environmental changes in this area. Here, we analyzed lipid biomarkers (e.g. long-ch...
Published in: | Frontiers in Marine Science |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Frontiers Media S.A.
2023
|
Subjects: | |
Online Access: | https://doi.org/10.3389/fmars.2023.1077656 https://doaj.org/article/456bbd38f30946f39106df4649635d8b |
id |
ftdoajarticles:oai:doaj.org/article:456bbd38f30946f39106df4649635d8b |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:456bbd38f30946f39106df4649635d8b 2023-05-15T15:14:30+02:00 Biomarker evidence of the water mass structure and primary productivity changes in the Chukchi Sea over the past 70 years Chao Gao Xiaoyan Ruan Yi Ge Zhang Huan Yang Xiaotong Xiao Xiaoxia Lü Yi Yang Hongmei Wang Xiaoguo Yu 2023-01-01T00:00:00Z https://doi.org/10.3389/fmars.2023.1077656 https://doaj.org/article/456bbd38f30946f39106df4649635d8b EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2023.1077656/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2023.1077656 https://doaj.org/article/456bbd38f30946f39106df4649635d8b Frontiers in Marine Science, Vol 10 (2023) Chukchi Sea Phytoplankton Primary productivity Water mass structure Lipid biomarkers Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2023 ftdoajarticles https://doi.org/10.3389/fmars.2023.1077656 2023-01-22T01:32:31Z The Chukchi Sea has experienced significant changes under global warming in the Common Era, including the shift of primary productivity. However, modern observations are too short to fully investigate the effects of environmental changes in this area. Here, we analyzed lipid biomarkers (e.g. long-chain n-alkanes, n-alkanols, n-alkanoic acids, diols, and sterols) from a sediment core (R07) collected from the Chukchi Sea shelf to determine phytoplankton primary productivity variations and factors influencing these changes over the past 70 years. Similar trends of the abundance of terrestrial ecosystem-derived compounds (e.g. long-chain n-alkanes, n-alkanols, n-alkanoic acids, and C32 1,15-diol) indicate that terrigenous input increased from ca. 1946 towards ca. 1983 and then decreased thereafter. In comparison, biomarkers with marine origin indicate that the ratio of diatoms to dinoflagellates increased after ca. 1983 towards the core-top (ca. 2011). Concurrent changes in terrigenous input and phytoplankton community indicated a shift in water mass structure at ca. 1983 (i.e. the Alaska Coastal Water decreased and the Bering Sea Water increased), which may be attributed to the phase shift of the Arctic Oscillation and/or unsynchronized flow changes in different water masses. Owing to the different water mass properties, the change of water mass structure caused intense water mixing and the resulting high turbidity in the study area, which led to light limitation for phytoplankton growth. These conditions probably account for the reduced phytoplankton primary productivity from ca. 1983 to ca. 2000 in the general trend of increasing. The results indicate that, in addition to global warming and sea ice retreat, other factors, such as change in regional water mass structure (i.e. different water masses), may also have a significant influence on the primary productivity and the phytoplankton community in the Chukchi Sea shelf. Article in Journal/Newspaper Arctic Bering Sea Chukchi Chukchi Sea Global warming Phytoplankton Sea ice Alaska Directory of Open Access Journals: DOAJ Articles Arctic Bering Sea Chukchi Sea Frontiers in Marine Science 10 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Chukchi Sea Phytoplankton Primary productivity Water mass structure Lipid biomarkers Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
Chukchi Sea Phytoplankton Primary productivity Water mass structure Lipid biomarkers Science Q General. Including nature conservation geographical distribution QH1-199.5 Chao Gao Xiaoyan Ruan Yi Ge Zhang Huan Yang Xiaotong Xiao Xiaoxia Lü Yi Yang Hongmei Wang Xiaoguo Yu Biomarker evidence of the water mass structure and primary productivity changes in the Chukchi Sea over the past 70 years |
topic_facet |
Chukchi Sea Phytoplankton Primary productivity Water mass structure Lipid biomarkers Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
The Chukchi Sea has experienced significant changes under global warming in the Common Era, including the shift of primary productivity. However, modern observations are too short to fully investigate the effects of environmental changes in this area. Here, we analyzed lipid biomarkers (e.g. long-chain n-alkanes, n-alkanols, n-alkanoic acids, diols, and sterols) from a sediment core (R07) collected from the Chukchi Sea shelf to determine phytoplankton primary productivity variations and factors influencing these changes over the past 70 years. Similar trends of the abundance of terrestrial ecosystem-derived compounds (e.g. long-chain n-alkanes, n-alkanols, n-alkanoic acids, and C32 1,15-diol) indicate that terrigenous input increased from ca. 1946 towards ca. 1983 and then decreased thereafter. In comparison, biomarkers with marine origin indicate that the ratio of diatoms to dinoflagellates increased after ca. 1983 towards the core-top (ca. 2011). Concurrent changes in terrigenous input and phytoplankton community indicated a shift in water mass structure at ca. 1983 (i.e. the Alaska Coastal Water decreased and the Bering Sea Water increased), which may be attributed to the phase shift of the Arctic Oscillation and/or unsynchronized flow changes in different water masses. Owing to the different water mass properties, the change of water mass structure caused intense water mixing and the resulting high turbidity in the study area, which led to light limitation for phytoplankton growth. These conditions probably account for the reduced phytoplankton primary productivity from ca. 1983 to ca. 2000 in the general trend of increasing. The results indicate that, in addition to global warming and sea ice retreat, other factors, such as change in regional water mass structure (i.e. different water masses), may also have a significant influence on the primary productivity and the phytoplankton community in the Chukchi Sea shelf. |
format |
Article in Journal/Newspaper |
author |
Chao Gao Xiaoyan Ruan Yi Ge Zhang Huan Yang Xiaotong Xiao Xiaoxia Lü Yi Yang Hongmei Wang Xiaoguo Yu |
author_facet |
Chao Gao Xiaoyan Ruan Yi Ge Zhang Huan Yang Xiaotong Xiao Xiaoxia Lü Yi Yang Hongmei Wang Xiaoguo Yu |
author_sort |
Chao Gao |
title |
Biomarker evidence of the water mass structure and primary productivity changes in the Chukchi Sea over the past 70 years |
title_short |
Biomarker evidence of the water mass structure and primary productivity changes in the Chukchi Sea over the past 70 years |
title_full |
Biomarker evidence of the water mass structure and primary productivity changes in the Chukchi Sea over the past 70 years |
title_fullStr |
Biomarker evidence of the water mass structure and primary productivity changes in the Chukchi Sea over the past 70 years |
title_full_unstemmed |
Biomarker evidence of the water mass structure and primary productivity changes in the Chukchi Sea over the past 70 years |
title_sort |
biomarker evidence of the water mass structure and primary productivity changes in the chukchi sea over the past 70 years |
publisher |
Frontiers Media S.A. |
publishDate |
2023 |
url |
https://doi.org/10.3389/fmars.2023.1077656 https://doaj.org/article/456bbd38f30946f39106df4649635d8b |
geographic |
Arctic Bering Sea Chukchi Sea |
geographic_facet |
Arctic Bering Sea Chukchi Sea |
genre |
Arctic Bering Sea Chukchi Chukchi Sea Global warming Phytoplankton Sea ice Alaska |
genre_facet |
Arctic Bering Sea Chukchi Chukchi Sea Global warming Phytoplankton Sea ice Alaska |
op_source |
Frontiers in Marine Science, Vol 10 (2023) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2023.1077656/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2023.1077656 https://doaj.org/article/456bbd38f30946f39106df4649635d8b |
op_doi |
https://doi.org/10.3389/fmars.2023.1077656 |
container_title |
Frontiers in Marine Science |
container_volume |
10 |
_version_ |
1766344939368611840 |