Molecular Weight Distribution of Humic Acids Isolated from Buried Soils and Yedoma Sediments
The soils of cold regions store up to 60% of all organic carbon on the planet. As a result of climate change, this organic matter can be biodegraded by microorganisms and thereby make an additional contribution to carbon balance. Nowadays, there are fragmentary data on organic C stocks in high-latit...
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ftdoajarticles:oai:doaj.org/article:5042a69452674c3ab2ec6676d6e30b12 2023-07-23T04:20:13+02:00 Molecular Weight Distribution of Humic Acids Isolated from Buried Soils and Yedoma Sediments Vyacheslav Polyakov Evgeny Abakumov Evgeny Lodygin Roman Vasilevich 2023-05-01T00:00:00Z https://doi.org/10.3390/agronomy13061483 https://doaj.org/article/5042a69452674c3ab2ec6676d6e30b12 EN eng MDPI AG https://www.mdpi.com/2073-4395/13/6/1483 https://doaj.org/toc/2073-4395 doi:10.3390/agronomy13061483 2073-4395 https://doaj.org/article/5042a69452674c3ab2ec6676d6e30b12 Agronomy, Vol 13, Iss 1483, p 1483 (2023) transformation of SOM buried organic matter permafrost thawing cryosols Fluvisols Lena Delta river Agriculture S article 2023 ftdoajarticles https://doi.org/10.3390/agronomy13061483 2023-07-02T00:39:14Z The soils of cold regions store up to 60% of all organic carbon on the planet. As a result of climate change, this organic matter can be biodegraded by microorganisms and thereby make an additional contribution to carbon balance. Nowadays, there are fragmentary data on organic C stocks in high-latitude soils and single works on the analysis of the quality of buried organic matter. This paper presents the first data on the molecular weight distributions of humic acids (HAs) extracted from soils and sediments in Yedoma. Molecular weight distributions of HAs preparations were obtained on an AKTAbasic 10 UPS chromatographic system (Amersham Biosciences, Sweden) using a SuperdexTM 200 10/300 GL column (with cross-linked dextran gel, fractionation range for globular proteins 10–600 kDa). As a result of the study, it was found that the buried soil horizons are characterized by the highest content of low molecular weight fraction (with molecular mass ( Mr ) 1.4–1.9 kDa and molar fraction in the range of 54.3–67.1%). The high molecular weight fraction is concentrated mainly in the superficial horizons and decreases with depth (with Mr 299–346 kDa and molar fraction in the range of 3.4–9.8%). In the Yedoma sediments, the maximum content of the medium-molecular fraction is observed (with Mr 24.6 kDa and 39.6% of the molar fraction), which may indicate a low rate of organic matter transformation in the permafrost. The data obtained serve as a database of analysis in terms of modeling the global carbon cycle in the cold regions of the planet. Article in Journal/Newspaper lena delta permafrost Directory of Open Access Journals: DOAJ Articles Delta River ENVELOPE(-103.371,-103.371,78.769,78.769) Agronomy 13 6 1483 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
transformation of SOM buried organic matter permafrost thawing cryosols Fluvisols Lena Delta river Agriculture S |
spellingShingle |
transformation of SOM buried organic matter permafrost thawing cryosols Fluvisols Lena Delta river Agriculture S Vyacheslav Polyakov Evgeny Abakumov Evgeny Lodygin Roman Vasilevich Molecular Weight Distribution of Humic Acids Isolated from Buried Soils and Yedoma Sediments |
topic_facet |
transformation of SOM buried organic matter permafrost thawing cryosols Fluvisols Lena Delta river Agriculture S |
description |
The soils of cold regions store up to 60% of all organic carbon on the planet. As a result of climate change, this organic matter can be biodegraded by microorganisms and thereby make an additional contribution to carbon balance. Nowadays, there are fragmentary data on organic C stocks in high-latitude soils and single works on the analysis of the quality of buried organic matter. This paper presents the first data on the molecular weight distributions of humic acids (HAs) extracted from soils and sediments in Yedoma. Molecular weight distributions of HAs preparations were obtained on an AKTAbasic 10 UPS chromatographic system (Amersham Biosciences, Sweden) using a SuperdexTM 200 10/300 GL column (with cross-linked dextran gel, fractionation range for globular proteins 10–600 kDa). As a result of the study, it was found that the buried soil horizons are characterized by the highest content of low molecular weight fraction (with molecular mass ( Mr ) 1.4–1.9 kDa and molar fraction in the range of 54.3–67.1%). The high molecular weight fraction is concentrated mainly in the superficial horizons and decreases with depth (with Mr 299–346 kDa and molar fraction in the range of 3.4–9.8%). In the Yedoma sediments, the maximum content of the medium-molecular fraction is observed (with Mr 24.6 kDa and 39.6% of the molar fraction), which may indicate a low rate of organic matter transformation in the permafrost. The data obtained serve as a database of analysis in terms of modeling the global carbon cycle in the cold regions of the planet. |
format |
Article in Journal/Newspaper |
author |
Vyacheslav Polyakov Evgeny Abakumov Evgeny Lodygin Roman Vasilevich |
author_facet |
Vyacheslav Polyakov Evgeny Abakumov Evgeny Lodygin Roman Vasilevich |
author_sort |
Vyacheslav Polyakov |
title |
Molecular Weight Distribution of Humic Acids Isolated from Buried Soils and Yedoma Sediments |
title_short |
Molecular Weight Distribution of Humic Acids Isolated from Buried Soils and Yedoma Sediments |
title_full |
Molecular Weight Distribution of Humic Acids Isolated from Buried Soils and Yedoma Sediments |
title_fullStr |
Molecular Weight Distribution of Humic Acids Isolated from Buried Soils and Yedoma Sediments |
title_full_unstemmed |
Molecular Weight Distribution of Humic Acids Isolated from Buried Soils and Yedoma Sediments |
title_sort |
molecular weight distribution of humic acids isolated from buried soils and yedoma sediments |
publisher |
MDPI AG |
publishDate |
2023 |
url |
https://doi.org/10.3390/agronomy13061483 https://doaj.org/article/5042a69452674c3ab2ec6676d6e30b12 |
long_lat |
ENVELOPE(-103.371,-103.371,78.769,78.769) |
geographic |
Delta River |
geographic_facet |
Delta River |
genre |
lena delta permafrost |
genre_facet |
lena delta permafrost |
op_source |
Agronomy, Vol 13, Iss 1483, p 1483 (2023) |
op_relation |
https://www.mdpi.com/2073-4395/13/6/1483 https://doaj.org/toc/2073-4395 doi:10.3390/agronomy13061483 2073-4395 https://doaj.org/article/5042a69452674c3ab2ec6676d6e30b12 |
op_doi |
https://doi.org/10.3390/agronomy13061483 |
container_title |
Agronomy |
container_volume |
13 |
container_issue |
6 |
container_start_page |
1483 |
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1772184036327817216 |