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...
Published in: | Biogeochemistry |
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2023
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Online Access: | https://hdl.handle.net/10449/81655 https://doi.org/10.1007/s10533-023-01076-1 |
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ftiasma:oai:openpub.fmach.it:10449/81655 2024-04-21T08:04:32+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 Meisel, O.H. Rijkers, R. Dean, J.F. in ‘t Zandt, M.H. van Huissteden, J. Maximov, T.C. Karsanaev, S.V. Belelli Marchesini, L. Goovaerts, A. Wacker, L. Reichart, G. Bouillon, S. Welte, C.U. Jetten, M.S.M. Vonk, J.E. Dolman, H. 2023 https://hdl.handle.net/10449/81655 https://doi.org/10.1007/s10533-023-01076-1 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:001077048300001 volume:165 firstpage:239 lastpage:263 journal:BIOGEOCHEMISTRY https://hdl.handle.net/10449/81655 doi:10.1007/s10533-023-01076-1 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85168627585 info:eu-repo/semantics/openAccess Thermokarst lakes Far East Siberia Arctic permafrost Yedoma SOC Microbial diversity Settore BIO/07 - ECOLOGIA info:eu-repo/semantics/article 2023 ftiasma https://doi.org/10.1007/s10533-023-01076-1 2024-03-27T17:48:56Z 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 Ice permafrost Thermokarst Siberia Fondazione Edmund Mach: IRIS-OpenPub Biogeochemistry |
institution |
Open Polar |
collection |
Fondazione Edmund Mach: IRIS-OpenPub |
op_collection_id |
ftiasma |
language |
English |
topic |
Thermokarst lakes Far East Siberia Arctic permafrost Yedoma SOC Microbial diversity Settore BIO/07 - ECOLOGIA |
spellingShingle |
Thermokarst lakes Far East Siberia Arctic permafrost Yedoma SOC Microbial diversity Settore BIO/07 - ECOLOGIA 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 Settore BIO/07 - ECOLOGIA |
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 ... |
author2 |
Meisel, O.H. Rijkers, R. Dean, J.F. in ‘t Zandt, M.H. van Huissteden, J. Maximov, T.C. Karsanaev, S.V. Belelli Marchesini, L. Goovaerts, A. Wacker, L. Reichart, G. Bouillon, S. Welte, C.U. Jetten, M.S.M. Vonk, J.E. Dolman, H. |
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 |
publishDate |
2023 |
url |
https://hdl.handle.net/10449/81655 https://doi.org/10.1007/s10533-023-01076-1 |
genre |
Ice permafrost Thermokarst Siberia |
genre_facet |
Ice permafrost Thermokarst Siberia |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:001077048300001 volume:165 firstpage:239 lastpage:263 journal:BIOGEOCHEMISTRY https://hdl.handle.net/10449/81655 doi:10.1007/s10533-023-01076-1 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85168627585 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1007/s10533-023-01076-1 |
container_title |
Biogeochemistry |
_version_ |
1796944102441353216 |