Geochemical, sedimentological and microbial diversity in two thermokarst lakes of far Eastern Siberia
Thermokarst lakes are important conduits for organic carbon sequestration, soil organic matter (soil-OM) decomposition and release of atmospheric greenhouse gases in the Arctic. They can be classified as either floating-ice lakes, which sustain a zone of unfrozen sediment (talik) at the lakebed year...
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ftethz:oai:www.research-collection.ethz.ch:20.500.11850/637399 2024-04-28T08:09:56+00:00 Geochemical, sedimentological and microbial diversity in two thermokarst lakes of far Eastern Siberia Meisel, Ove H. Rijkers, Ruud Dean, Joshua F. In 't Zandt, Michiel H. van Huissteden, Jacobus Maximov, Trofim C. Karsanaev, Sergey V. Belelli Marchesini, Luca Goovaerts, Arne Wacker, Lukas Reichart, Gert-Jan Bouillon, Steven Welte, Cornelia U. Jetten, Mike S.M. Vonk, Jorien E. Dolman, Han 2023-09 application/application/pdf https://hdl.handle.net/20.500.11850/637399 https://doi.org/10.3929/ethz-b-000637399 en eng Springer info:eu-repo/semantics/altIdentifier/doi/10.1007/s10533-023-01076-1 info:eu-repo/semantics/altIdentifier/wos/001077048300001 http://hdl.handle.net/20.500.11850/637399 doi:10.3929/ethz-b-000637399 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International Biogeochemistry, 165 Thermokarst lakes Far East Siberia Arctic permafrost Yedoma SOC Microbial diversity info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2023 ftethz https://doi.org/20.500.11850/63739910.3929/ethz-b-00063739910.1007/s10533-023-01076-1 2024-04-03T14:03:35Z Thermokarst lakes are important conduits for organic carbon sequestration, soil organic matter (soil-OM) decomposition and release of atmospheric greenhouse gases in the Arctic. They can be classified as either floating-ice lakes, which sustain a zone of unfrozen sediment (talik) at the lakebed year-round, or as bedfast-ice lakes, which freeze all the way to the lakebed in winter. Another key characteristic of thermokarst lakes are their eroding shorelines, depending on the surrounding landscape, they can play a major role in supplying the lakebeds with sediment and OM. These differences in winter ice regime and eroding shorelines are key factors which determine the quantity and quality of OM in thermokarst lake sediments. We used an array of physical, geochemical, and microbiological tools to identify the differences in the environmental conditions, sedimentary characteristics, carbon stocks and microbial community compositions in the sediments of a bedfast-ice and a floating-ice lake in Far East Siberia with different eroding shorelines. Our data show strong differences across most of the measured parameters between the two lakes. For example, the floating-ice lake contains considerably lower amounts of sediment organic matter and dissolved organic carbon, both of which also appear to be more degraded in comparison to the bedfast-ice lake, based on their stable carbon isotope composition (δ¹³C). We also document clear differences in the microbial community composition, for both archaea and bacteria. We identified the lake water depth (bedfast-ice vs. floating-ice) and shoreline erosion to be the two most likely main drivers of the sedimentary, microbial and biogeochemical diversity in thermokarst lakes. With ongoing climate warming, it is likely that an increasing number of lakes will shift from a bedfast- to a floating-ice state, and that increasing levels of shoreline erosion will supply the lakes with sediments. Yet, still little is known about the physical, biogeochemical and microbial differences in the ... Article in Journal/Newspaper Arctic Ice permafrost Thermokarst Siberia ETH Zürich Research Collection |
institution |
Open Polar |
collection |
ETH Zürich Research Collection |
op_collection_id |
ftethz |
language |
English |
topic |
Thermokarst lakes Far East Siberia Arctic permafrost Yedoma SOC Microbial diversity |
spellingShingle |
Thermokarst lakes Far East Siberia Arctic permafrost Yedoma SOC Microbial diversity Meisel, Ove H. Rijkers, Ruud Dean, Joshua F. In 't Zandt, Michiel H. van Huissteden, Jacobus Maximov, Trofim C. Karsanaev, Sergey V. Belelli Marchesini, Luca Goovaerts, Arne Wacker, Lukas Reichart, Gert-Jan Bouillon, Steven Welte, Cornelia U. Jetten, Mike S.M. Vonk, Jorien E. Dolman, Han Geochemical, sedimentological and microbial diversity in two thermokarst lakes of far Eastern Siberia |
topic_facet |
Thermokarst lakes Far East Siberia Arctic permafrost Yedoma SOC Microbial diversity |
description |
Thermokarst lakes are important conduits for organic carbon sequestration, soil organic matter (soil-OM) decomposition and release of atmospheric greenhouse gases in the Arctic. They can be classified as either floating-ice lakes, which sustain a zone of unfrozen sediment (talik) at the lakebed year-round, or as bedfast-ice lakes, which freeze all the way to the lakebed in winter. Another key characteristic of thermokarst lakes are their eroding shorelines, depending on the surrounding landscape, they can play a major role in supplying the lakebeds with sediment and OM. These differences in winter ice regime and eroding shorelines are key factors which determine the quantity and quality of OM in thermokarst lake sediments. We used an array of physical, geochemical, and microbiological tools to identify the differences in the environmental conditions, sedimentary characteristics, carbon stocks and microbial community compositions in the sediments of a bedfast-ice and a floating-ice lake in Far East Siberia with different eroding shorelines. Our data show strong differences across most of the measured parameters between the two lakes. For example, the floating-ice lake contains considerably lower amounts of sediment organic matter and dissolved organic carbon, both of which also appear to be more degraded in comparison to the bedfast-ice lake, based on their stable carbon isotope composition (δ¹³C). We also document clear differences in the microbial community composition, for both archaea and bacteria. We identified the lake water depth (bedfast-ice vs. floating-ice) and shoreline erosion to be the two most likely main drivers of the sedimentary, microbial and biogeochemical diversity in thermokarst lakes. With ongoing climate warming, it is likely that an increasing number of lakes will shift from a bedfast- to a floating-ice state, and that increasing levels of shoreline erosion will supply the lakes with sediments. Yet, still little is known about the physical, biogeochemical and microbial differences in the ... |
format |
Article in Journal/Newspaper |
author |
Meisel, Ove H. Rijkers, Ruud Dean, Joshua F. In 't Zandt, Michiel H. van Huissteden, Jacobus Maximov, Trofim C. Karsanaev, Sergey V. Belelli Marchesini, Luca Goovaerts, Arne Wacker, Lukas Reichart, Gert-Jan Bouillon, Steven Welte, Cornelia U. Jetten, Mike S.M. Vonk, Jorien E. Dolman, Han |
author_facet |
Meisel, Ove H. Rijkers, Ruud Dean, Joshua F. In 't Zandt, Michiel H. van Huissteden, Jacobus Maximov, Trofim C. Karsanaev, Sergey V. Belelli Marchesini, Luca Goovaerts, Arne Wacker, Lukas Reichart, Gert-Jan Bouillon, Steven Welte, Cornelia U. Jetten, Mike S.M. Vonk, Jorien E. Dolman, Han |
author_sort |
Meisel, Ove H. |
title |
Geochemical, sedimentological and microbial diversity in two thermokarst lakes of far Eastern Siberia |
title_short |
Geochemical, sedimentological and microbial diversity in two thermokarst lakes of far Eastern Siberia |
title_full |
Geochemical, sedimentological and microbial diversity in two thermokarst lakes of far Eastern Siberia |
title_fullStr |
Geochemical, sedimentological and microbial diversity in two thermokarst lakes of far Eastern Siberia |
title_full_unstemmed |
Geochemical, sedimentological and microbial diversity in two thermokarst lakes of far Eastern Siberia |
title_sort |
geochemical, sedimentological and microbial diversity in two thermokarst lakes of far eastern siberia |
publisher |
Springer |
publishDate |
2023 |
url |
https://hdl.handle.net/20.500.11850/637399 https://doi.org/10.3929/ethz-b-000637399 |
genre |
Arctic Ice permafrost Thermokarst Siberia |
genre_facet |
Arctic Ice permafrost Thermokarst Siberia |
op_source |
Biogeochemistry, 165 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s10533-023-01076-1 info:eu-repo/semantics/altIdentifier/wos/001077048300001 http://hdl.handle.net/20.500.11850/637399 doi:10.3929/ethz-b-000637399 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International |
op_doi |
https://doi.org/20.500.11850/63739910.3929/ethz-b-00063739910.1007/s10533-023-01076-1 |
_version_ |
1797578075319304192 |