Genomic identification of the long-chain alkenone producer in freshwater Lake Toyoni, Japan: implications for temperature reconstructions
Identifying the lacustrine haptophyte species that produce long-chain alkenones (LCAs) is essential prior to down-core temperature reconstructions. Here, we investigated the identity of LCA-producing species from Lake Toyoni, Japan using 18S ribosomal DNA (rDNA) and organic geochemical analyses. The...
Main Authors: | , , , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Pergamon Press
|
Subjects: | |
Online Access: | https://eprint.ncl.ac.uk/fulltext.aspx?url=251216/F6424F6B-148D-43F0-8E36-95525C71A2DF.pdf&pub_id=251216 |
id |
ftunivnewcastle:oai:eprint.ncl.ac.uk:251216 |
---|---|
record_format |
openpolar |
spelling |
ftunivnewcastle:oai:eprint.ncl.ac.uk:251216 2023-05-15T16:26:13+02:00 Genomic identification of the long-chain alkenone producer in freshwater Lake Toyoni, Japan: implications for temperature reconstructions Plancq J McColl JL Bendle JA Seki O Couto JM Henderson ACG Yamashita Y Kimitaka K Toney JL application/pdf https://eprint.ncl.ac.uk/fulltext.aspx?url=251216/F6424F6B-148D-43F0-8E36-95525C71A2DF.pdf&pub_id=251216 unknown Pergamon Press Organic Geochemistry Article ftunivnewcastle 2020-06-11T23:43:41Z Identifying the lacustrine haptophyte species that produce long-chain alkenones (LCAs) is essential prior to down-core temperature reconstructions. Here, we investigated the identity of LCA-producing species from Lake Toyoni, Japan using 18S ribosomal DNA (rDNA) and organic geochemical analyses. The rDNA analyses identified eighteen operational taxonomic units (OTUs) of which only one fell within the haptophyte phylotype. This haptophyte belongs to the Group I phylotype, as supported by the LCA distribution found in surface and down-core sediments, and is closely related to a haptophyte found in Lake BrayaSø (Greenland). The inferred temperature using the Greenland calibration is very close to the Lake Toyoni surface temperature recorded during the spring/early summer season, when the LCA-producing haptophyte is likely to bloom. We therefore suggest that the temperature calibration from the Lake BrayaSø, Greenland is a suitable calibration for down-core temperature reconstructions at Lake Toyoni. Article in Journal/Newspaper Greenland Newcastle University Library ePrints Service Greenland |
institution |
Open Polar |
collection |
Newcastle University Library ePrints Service |
op_collection_id |
ftunivnewcastle |
language |
unknown |
description |
Identifying the lacustrine haptophyte species that produce long-chain alkenones (LCAs) is essential prior to down-core temperature reconstructions. Here, we investigated the identity of LCA-producing species from Lake Toyoni, Japan using 18S ribosomal DNA (rDNA) and organic geochemical analyses. The rDNA analyses identified eighteen operational taxonomic units (OTUs) of which only one fell within the haptophyte phylotype. This haptophyte belongs to the Group I phylotype, as supported by the LCA distribution found in surface and down-core sediments, and is closely related to a haptophyte found in Lake BrayaSø (Greenland). The inferred temperature using the Greenland calibration is very close to the Lake Toyoni surface temperature recorded during the spring/early summer season, when the LCA-producing haptophyte is likely to bloom. We therefore suggest that the temperature calibration from the Lake BrayaSø, Greenland is a suitable calibration for down-core temperature reconstructions at Lake Toyoni. |
format |
Article in Journal/Newspaper |
author |
Plancq J McColl JL Bendle JA Seki O Couto JM Henderson ACG Yamashita Y Kimitaka K Toney JL |
spellingShingle |
Plancq J McColl JL Bendle JA Seki O Couto JM Henderson ACG Yamashita Y Kimitaka K Toney JL Genomic identification of the long-chain alkenone producer in freshwater Lake Toyoni, Japan: implications for temperature reconstructions |
author_facet |
Plancq J McColl JL Bendle JA Seki O Couto JM Henderson ACG Yamashita Y Kimitaka K Toney JL |
author_sort |
Plancq J |
title |
Genomic identification of the long-chain alkenone producer in freshwater Lake Toyoni, Japan: implications for temperature reconstructions |
title_short |
Genomic identification of the long-chain alkenone producer in freshwater Lake Toyoni, Japan: implications for temperature reconstructions |
title_full |
Genomic identification of the long-chain alkenone producer in freshwater Lake Toyoni, Japan: implications for temperature reconstructions |
title_fullStr |
Genomic identification of the long-chain alkenone producer in freshwater Lake Toyoni, Japan: implications for temperature reconstructions |
title_full_unstemmed |
Genomic identification of the long-chain alkenone producer in freshwater Lake Toyoni, Japan: implications for temperature reconstructions |
title_sort |
genomic identification of the long-chain alkenone producer in freshwater lake toyoni, japan: implications for temperature reconstructions |
publisher |
Pergamon Press |
url |
https://eprint.ncl.ac.uk/fulltext.aspx?url=251216/F6424F6B-148D-43F0-8E36-95525C71A2DF.pdf&pub_id=251216 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
Organic Geochemistry |
_version_ |
1766015110276448256 |