Humic surface waters of frozen peat bogs (permafrost zone) are highly resistant to bio- and photodegradation
In contrast to the large number of studies on humic waters from permafrost-free regions and oligotrophic waters from permafrost-bearing regions, the bio- and photolability of DOM from the humic surface waters of permafrost-bearing regions has not been thoroughly evaluated. Following standardized pro...
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ftdoajarticles:oai:doaj.org/article:adca09f4f4d54d978d6789d2af6f683b 2023-05-15T17:55:00+02:00 Humic surface waters of frozen peat bogs (permafrost zone) are highly resistant to bio- and photodegradation L. S. Shirokova A. V. Chupakov S. A. Zabelina N. V. Neverova D. Payandi-Rolland C. Causserand J. Karlsson O. S. Pokrovsky 2019-06-01T00:00:00Z https://doi.org/10.5194/bg-16-2511-2019 https://doaj.org/article/adca09f4f4d54d978d6789d2af6f683b EN eng Copernicus Publications https://www.biogeosciences.net/16/2511/2019/bg-16-2511-2019.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-16-2511-2019 1726-4170 1726-4189 https://doaj.org/article/adca09f4f4d54d978d6789d2af6f683b Biogeosciences, Vol 16, Pp 2511-2526 (2019) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2019 ftdoajarticles https://doi.org/10.5194/bg-16-2511-2019 2022-12-31T07:20:12Z In contrast to the large number of studies on humic waters from permafrost-free regions and oligotrophic waters from permafrost-bearing regions, the bio- and photolability of DOM from the humic surface waters of permafrost-bearing regions has not been thoroughly evaluated. Following standardized protocol, we measured biodegradation (at low, intermediate and high temperatures) and photodegradation (at one intermediate temperature) of DOM in surface waters along the hydrological continuum (depression → stream → thermokarst lake → Pechora River) within a frozen peatland in European Russia. In all systems, within the experimental resolution of 5 % to 10 %, there was no bio- or photodegradation of DOM over a 1-month incubation period. It is possible that the main cause of the lack of degradation is the dominance of allochthonous refractory (soil, peat) DOM in all waters studied. However, all surface waters were supersaturated with CO 2 . Thus, this study suggests that, rather than bio- and photodegradation of DOM in the water column, other factors such as peat pore-water DOM processing and respiration of sediments are the main drivers of elevated p CO 2 and CO 2 emission in humic boreal waters of frozen peat bogs. Article in Journal/Newspaper Pechora permafrost Thermokarst Directory of Open Access Journals: DOAJ Articles Biogeosciences 16 12 2511 2526 |
institution |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 L. S. Shirokova A. V. Chupakov S. A. Zabelina N. V. Neverova D. Payandi-Rolland C. Causserand J. Karlsson O. S. Pokrovsky Humic surface waters of frozen peat bogs (permafrost zone) are highly resistant to bio- and photodegradation |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
In contrast to the large number of studies on humic waters from permafrost-free regions and oligotrophic waters from permafrost-bearing regions, the bio- and photolability of DOM from the humic surface waters of permafrost-bearing regions has not been thoroughly evaluated. Following standardized protocol, we measured biodegradation (at low, intermediate and high temperatures) and photodegradation (at one intermediate temperature) of DOM in surface waters along the hydrological continuum (depression → stream → thermokarst lake → Pechora River) within a frozen peatland in European Russia. In all systems, within the experimental resolution of 5 % to 10 %, there was no bio- or photodegradation of DOM over a 1-month incubation period. It is possible that the main cause of the lack of degradation is the dominance of allochthonous refractory (soil, peat) DOM in all waters studied. However, all surface waters were supersaturated with CO 2 . Thus, this study suggests that, rather than bio- and photodegradation of DOM in the water column, other factors such as peat pore-water DOM processing and respiration of sediments are the main drivers of elevated p CO 2 and CO 2 emission in humic boreal waters of frozen peat bogs. |
format |
Article in Journal/Newspaper |
author |
L. S. Shirokova A. V. Chupakov S. A. Zabelina N. V. Neverova D. Payandi-Rolland C. Causserand J. Karlsson O. S. Pokrovsky |
author_facet |
L. S. Shirokova A. V. Chupakov S. A. Zabelina N. V. Neverova D. Payandi-Rolland C. Causserand J. Karlsson O. S. Pokrovsky |
author_sort |
L. S. Shirokova |
title |
Humic surface waters of frozen peat bogs (permafrost zone) are highly resistant to bio- and photodegradation |
title_short |
Humic surface waters of frozen peat bogs (permafrost zone) are highly resistant to bio- and photodegradation |
title_full |
Humic surface waters of frozen peat bogs (permafrost zone) are highly resistant to bio- and photodegradation |
title_fullStr |
Humic surface waters of frozen peat bogs (permafrost zone) are highly resistant to bio- and photodegradation |
title_full_unstemmed |
Humic surface waters of frozen peat bogs (permafrost zone) are highly resistant to bio- and photodegradation |
title_sort |
humic surface waters of frozen peat bogs (permafrost zone) are highly resistant to bio- and photodegradation |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/bg-16-2511-2019 https://doaj.org/article/adca09f4f4d54d978d6789d2af6f683b |
genre |
Pechora permafrost Thermokarst |
genre_facet |
Pechora permafrost Thermokarst |
op_source |
Biogeosciences, Vol 16, Pp 2511-2526 (2019) |
op_relation |
https://www.biogeosciences.net/16/2511/2019/bg-16-2511-2019.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-16-2511-2019 1726-4170 1726-4189 https://doaj.org/article/adca09f4f4d54d978d6789d2af6f683b |
op_doi |
https://doi.org/10.5194/bg-16-2511-2019 |
container_title |
Biogeosciences |
container_volume |
16 |
container_issue |
12 |
container_start_page |
2511 |
op_container_end_page |
2526 |
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1766162874155139072 |