Distribution of pelagic phytoplankton-derived lipid biomarkers along a transect from the East Sea to the Bering Sea: insights into their suitability as open-water indicators
In this study we collected suspended particulate matter (SPM) along a transect from the East Sea to the Bering Sea from 18 to 28 July in 2015. We then analyzed the samples for the Arctic sea ice proxy IP25 together with various phytoplankton-derived lipids including a tri-unsaturated highly branched...
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The Geological Society of Korea
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Online Access: | http://hdl.handle.net/10026.1/19213 https://doi.org/10.14770/jgsk.2017.53.4.545 |
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ftunivplympearl:oai:pearl.plymouth.ac.uk:10026.1/19213 2024-05-19T07:35:37+00:00 Distribution of pelagic phytoplankton-derived lipid biomarkers along a transect from the East Sea to the Bering Sea: insights into their suitability as open-water indicators Gal, J-K Kim, J-H Smik, L Ha, SY Belt, ST Nam, S-I Shin, K-H 2017-08-30 545-554 application/pdf http://hdl.handle.net/10026.1/19213 https://doi.org/10.14770/jgsk.2017.53.4.545 en eng The Geological Society of Korea ISSN:0435-4036 ISSN:2288-7377 E-ISSN:2288-7377 0435-4036 2288-7377 http://hdl.handle.net/10026.1/19213 doi:10.14770/jgsk.2017.53.4.545 2022-5-13 Not known ice proxy biomarkers highly branched isoprenoid brassicasterol dinosterol journal-article Article 2017 ftunivplympearl https://doi.org/10.14770/jgsk.2017.53.4.545 2024-05-01T00:05:12Z In this study we collected suspended particulate matter (SPM) along a transect from the East Sea to the Bering Sea from 18 to 28 July in 2015. We then analyzed the samples for the Arctic sea ice proxy IP25 together with various phytoplankton-derived lipids including a tri-unsaturated highly branched isoprenoid (HBI triene) and two sterols (brassicasterol and dinosterol) to assess the suitability of these compounds for the so called PIP25 index in the western Arctic region as a proxy for sea ice change in the past. The distributions of some other commonly reported sterols (cholesterol and 24-methylene cholesterol) were also investigated. IP25 could not be detected in any of the samples analyzed, consistent with the nature of the sampling location and season, while the HBI triene was only detected at five sampling sites in the Northwest Pacific and the Bering Sea. In contrast, each of the sterols were detected at each sampling site. Interestingly, brassicasterol concentration showed a strong, positive relationship with cholesterol concentration, but no relationship with chlorophyll a, suggesting that the former might have been associated with not only marine phytoplankton but other sources in the study area, such as zooplankton. Dinosterol and HBI triene concentrations also showed no clear relationship with chl. a or with brassicasterol, indicating likely different and diverse sources of these lipids in addition to marine phytoplankton. Our study suggests that the use of brassicasterol, dinosterol, or HBI triene, as strict phytoplankton markers for use with the PIP25 index, might result in misleading outcomes. Hence, it is clear that more work is needed to better constrain the use of these lipids as ice-free, open ocean biomarkers when using the PIP25 index in the western Arctic region. Article in Journal/Newspaper Arctic Bering Sea Phytoplankton Sea ice Zooplankton PEARL (Plymouth Electronic Archiv & ResearchLibrary, Plymouth University) Journal of the Geological Society of Korea 53 4 545 554 |
institution |
Open Polar |
collection |
PEARL (Plymouth Electronic Archiv & ResearchLibrary, Plymouth University) |
op_collection_id |
ftunivplympearl |
language |
English |
topic |
ice proxy biomarkers highly branched isoprenoid brassicasterol dinosterol |
spellingShingle |
ice proxy biomarkers highly branched isoprenoid brassicasterol dinosterol Gal, J-K Kim, J-H Smik, L Ha, SY Belt, ST Nam, S-I Shin, K-H Distribution of pelagic phytoplankton-derived lipid biomarkers along a transect from the East Sea to the Bering Sea: insights into their suitability as open-water indicators |
topic_facet |
ice proxy biomarkers highly branched isoprenoid brassicasterol dinosterol |
description |
In this study we collected suspended particulate matter (SPM) along a transect from the East Sea to the Bering Sea from 18 to 28 July in 2015. We then analyzed the samples for the Arctic sea ice proxy IP25 together with various phytoplankton-derived lipids including a tri-unsaturated highly branched isoprenoid (HBI triene) and two sterols (brassicasterol and dinosterol) to assess the suitability of these compounds for the so called PIP25 index in the western Arctic region as a proxy for sea ice change in the past. The distributions of some other commonly reported sterols (cholesterol and 24-methylene cholesterol) were also investigated. IP25 could not be detected in any of the samples analyzed, consistent with the nature of the sampling location and season, while the HBI triene was only detected at five sampling sites in the Northwest Pacific and the Bering Sea. In contrast, each of the sterols were detected at each sampling site. Interestingly, brassicasterol concentration showed a strong, positive relationship with cholesterol concentration, but no relationship with chlorophyll a, suggesting that the former might have been associated with not only marine phytoplankton but other sources in the study area, such as zooplankton. Dinosterol and HBI triene concentrations also showed no clear relationship with chl. a or with brassicasterol, indicating likely different and diverse sources of these lipids in addition to marine phytoplankton. Our study suggests that the use of brassicasterol, dinosterol, or HBI triene, as strict phytoplankton markers for use with the PIP25 index, might result in misleading outcomes. Hence, it is clear that more work is needed to better constrain the use of these lipids as ice-free, open ocean biomarkers when using the PIP25 index in the western Arctic region. |
format |
Article in Journal/Newspaper |
author |
Gal, J-K Kim, J-H Smik, L Ha, SY Belt, ST Nam, S-I Shin, K-H |
author_facet |
Gal, J-K Kim, J-H Smik, L Ha, SY Belt, ST Nam, S-I Shin, K-H |
author_sort |
Gal, J-K |
title |
Distribution of pelagic phytoplankton-derived lipid biomarkers along a transect from the East Sea to the Bering Sea: insights into their suitability as open-water indicators |
title_short |
Distribution of pelagic phytoplankton-derived lipid biomarkers along a transect from the East Sea to the Bering Sea: insights into their suitability as open-water indicators |
title_full |
Distribution of pelagic phytoplankton-derived lipid biomarkers along a transect from the East Sea to the Bering Sea: insights into their suitability as open-water indicators |
title_fullStr |
Distribution of pelagic phytoplankton-derived lipid biomarkers along a transect from the East Sea to the Bering Sea: insights into their suitability as open-water indicators |
title_full_unstemmed |
Distribution of pelagic phytoplankton-derived lipid biomarkers along a transect from the East Sea to the Bering Sea: insights into their suitability as open-water indicators |
title_sort |
distribution of pelagic phytoplankton-derived lipid biomarkers along a transect from the east sea to the bering sea: insights into their suitability as open-water indicators |
publisher |
The Geological Society of Korea |
publishDate |
2017 |
url |
http://hdl.handle.net/10026.1/19213 https://doi.org/10.14770/jgsk.2017.53.4.545 |
genre |
Arctic Bering Sea Phytoplankton Sea ice Zooplankton |
genre_facet |
Arctic Bering Sea Phytoplankton Sea ice Zooplankton |
op_relation |
ISSN:0435-4036 ISSN:2288-7377 E-ISSN:2288-7377 0435-4036 2288-7377 http://hdl.handle.net/10026.1/19213 doi:10.14770/jgsk.2017.53.4.545 |
op_rights |
2022-5-13 Not known |
op_doi |
https://doi.org/10.14770/jgsk.2017.53.4.545 |
container_title |
Journal of the Geological Society of Korea |
container_volume |
53 |
container_issue |
4 |
container_start_page |
545 |
op_container_end_page |
554 |
_version_ |
1799474399438438400 |