Group I alkenones and Isochrysidales in the world’s largest maar lakes and their potential paleoclimate applications
The Espenberg maar lakes on the Seward Peninsula, Alaska, are the largest volcanic crater lakes in the world and contain the longest known lacustrine sedimentary archives in Alaska. The lack of glacial-aged marine sedimentary archives around the Bering Land Bridge due to exposure of the shelf during...
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ftnioz:oai:imis.nioz.nl:320669 2023-05-15T15:42:40+02:00 Group I alkenones and Isochrysidales in the world’s largest maar lakes and their potential paleoclimate applications Wang, K.J. O'Donnell, J.A. Longo, W.M. Amaral-Zettler, L.A. Li, G. Yao, Y. Huang, Y. 2019 http://imis.nioz.nl/imis.php?module=ref&refid=320669 en eng info:eu-repo/semantics/altIdentifier/wos/000500549500008 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1016/j.orggeochem.2019.103924 http://imis.nioz.nl/imis.php?module=ref&refid=320669 info:eu-repo/semantics/closedAccess %3Ci%3EOrg.+Geochem.+138%3C%2Fi%3E%3A+103924.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.orggeochem.2019.103924%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.orggeochem.2019.103924%3C%2Fa%3E Isochrysidales info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2019 ftnioz https://doi.org/10.1016/j.orggeochem.2019.103924 2022-05-01T14:11:13Z The Espenberg maar lakes on the Seward Peninsula, Alaska, are the largest volcanic crater lakes in the world and contain the longest known lacustrine sedimentary archives in Alaska. The lack of glacial-aged marine sedimentary archives around the Bering Land Bridge due to exposure of the shelf during sea level low-stands makes these lakes highly valuable for understanding the region’s past climate and environmental changes. Located en route to humanity’s last colonized American continents, the Seward Peninsula’s climate and environments during the last glacial period bear major anthropological significance. However, a lack of quantitative proxies has so far hampered exploration of these lakes for paleoclimate reconstructions. Here we report, for the first time, the discovery of abundant Group I alkenones and Isochrysidales in surface sediments from three maar lakes: White Fish, North Killeak and Devil Mountain, using a combination of lipid biomarker and 18S rRNA gene sequencing analyses. Our discovery adds to the expanding list of oligotrophic freshwater lakes where Group I alkenones are found, and water chemistry data contribute to the understanding of the environmental controls on Group I Isochrysidales. Our results further confirm the use of the U k 37 index of Group I alkenones as a proxy for the mean temperature of the spring isotherm (MTSI) and RIK37 as a quantitative measurement for Isochrysidales group mixing. We also demonstrate the analytical challenges for analyzing alkenones in freshwater lakes and the effectiveness of eliminating coelution using silver thiolate chromatographic material (AgTCM). Article in Journal/Newspaper Bering Land Bridge Seward Peninsula Alaska NIOZ Repository (Royal Netherlands Institute for Sea Research) Organic Geochemistry 138 103924 |
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NIOZ Repository (Royal Netherlands Institute for Sea Research) |
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language |
English |
topic |
Isochrysidales |
spellingShingle |
Isochrysidales Wang, K.J. O'Donnell, J.A. Longo, W.M. Amaral-Zettler, L.A. Li, G. Yao, Y. Huang, Y. Group I alkenones and Isochrysidales in the world’s largest maar lakes and their potential paleoclimate applications |
topic_facet |
Isochrysidales |
description |
The Espenberg maar lakes on the Seward Peninsula, Alaska, are the largest volcanic crater lakes in the world and contain the longest known lacustrine sedimentary archives in Alaska. The lack of glacial-aged marine sedimentary archives around the Bering Land Bridge due to exposure of the shelf during sea level low-stands makes these lakes highly valuable for understanding the region’s past climate and environmental changes. Located en route to humanity’s last colonized American continents, the Seward Peninsula’s climate and environments during the last glacial period bear major anthropological significance. However, a lack of quantitative proxies has so far hampered exploration of these lakes for paleoclimate reconstructions. Here we report, for the first time, the discovery of abundant Group I alkenones and Isochrysidales in surface sediments from three maar lakes: White Fish, North Killeak and Devil Mountain, using a combination of lipid biomarker and 18S rRNA gene sequencing analyses. Our discovery adds to the expanding list of oligotrophic freshwater lakes where Group I alkenones are found, and water chemistry data contribute to the understanding of the environmental controls on Group I Isochrysidales. Our results further confirm the use of the U k 37 index of Group I alkenones as a proxy for the mean temperature of the spring isotherm (MTSI) and RIK37 as a quantitative measurement for Isochrysidales group mixing. We also demonstrate the analytical challenges for analyzing alkenones in freshwater lakes and the effectiveness of eliminating coelution using silver thiolate chromatographic material (AgTCM). |
format |
Article in Journal/Newspaper |
author |
Wang, K.J. O'Donnell, J.A. Longo, W.M. Amaral-Zettler, L.A. Li, G. Yao, Y. Huang, Y. |
author_facet |
Wang, K.J. O'Donnell, J.A. Longo, W.M. Amaral-Zettler, L.A. Li, G. Yao, Y. Huang, Y. |
author_sort |
Wang, K.J. |
title |
Group I alkenones and Isochrysidales in the world’s largest maar lakes and their potential paleoclimate applications |
title_short |
Group I alkenones and Isochrysidales in the world’s largest maar lakes and their potential paleoclimate applications |
title_full |
Group I alkenones and Isochrysidales in the world’s largest maar lakes and their potential paleoclimate applications |
title_fullStr |
Group I alkenones and Isochrysidales in the world’s largest maar lakes and their potential paleoclimate applications |
title_full_unstemmed |
Group I alkenones and Isochrysidales in the world’s largest maar lakes and their potential paleoclimate applications |
title_sort |
group i alkenones and isochrysidales in the world’s largest maar lakes and their potential paleoclimate applications |
publishDate |
2019 |
url |
http://imis.nioz.nl/imis.php?module=ref&refid=320669 |
genre |
Bering Land Bridge Seward Peninsula Alaska |
genre_facet |
Bering Land Bridge Seward Peninsula Alaska |
op_source |
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op_relation |
info:eu-repo/semantics/altIdentifier/wos/000500549500008 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1016/j.orggeochem.2019.103924 http://imis.nioz.nl/imis.php?module=ref&refid=320669 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.orggeochem.2019.103924 |
container_title |
Organic Geochemistry |
container_volume |
138 |
container_start_page |
103924 |
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1766376628510785536 |