Humic surface waters of frozen peat bogs (permafrost zone) are highly resistant to bio- and photodegradation
International audience 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. Fol...
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ftunivnantes:oai:HAL:insu-03661419v1 2023-05-15T17:55:00+02:00 Humic surface waters of frozen peat bogs (permafrost zone) are highly resistant to bio- and photodegradation Shirokova, Liudmila S. Chupakov, Artem V. Zabelina, Svetlana A. Neverova, Natalia V. Payandi-Rolland, Dahedrey Causserand, Carole Karlsson, Jan Pokrovsky, Oleg S. Géosciences Environnement Toulouse (GET) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS) 2019 https://hal-insu.archives-ouvertes.fr/insu-03661419 https://hal-insu.archives-ouvertes.fr/insu-03661419/document https://hal-insu.archives-ouvertes.fr/insu-03661419/file/bg-16-2511-2019.pdf https://doi.org/10.5194/bg-16-2511-2019 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-16-2511-2019 insu-03661419 https://hal-insu.archives-ouvertes.fr/insu-03661419 https://hal-insu.archives-ouvertes.fr/insu-03661419/document https://hal-insu.archives-ouvertes.fr/insu-03661419/file/bg-16-2511-2019.pdf BIBCODE: 2019BGeo.16.2511S doi:10.5194/bg-16-2511-2019 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal-insu.archives-ouvertes.fr/insu-03661419 Biogeosciences, 2019, 16, pp.2511-2526. ⟨10.5194/bg-16-2511-2019⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2019 ftunivnantes https://doi.org/10.5194/bg-16-2511-2019 2023-02-22T02:00:02Z International audience 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 pCO 2 and CO 2 emission in humic boreal waters of frozen peat bogs. Article in Journal/Newspaper Pechora permafrost Thermokarst Université de Nantes: HAL-UNIV-NANTES Biogeosciences 16 12 2511 2526 |
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Université de Nantes: HAL-UNIV-NANTES |
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ftunivnantes |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Shirokova, Liudmila S. Chupakov, Artem V. Zabelina, Svetlana A. Neverova, Natalia V. Payandi-Rolland, Dahedrey Causserand, Carole Karlsson, Jan Pokrovsky, Oleg S. Humic surface waters of frozen peat bogs (permafrost zone) are highly resistant to bio- and photodegradation |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience 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 pCO 2 and CO 2 emission in humic boreal waters of frozen peat bogs. |
author2 |
Géosciences Environnement Toulouse (GET) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Shirokova, Liudmila S. Chupakov, Artem V. Zabelina, Svetlana A. Neverova, Natalia V. Payandi-Rolland, Dahedrey Causserand, Carole Karlsson, Jan Pokrovsky, Oleg S. |
author_facet |
Shirokova, Liudmila S. Chupakov, Artem V. Zabelina, Svetlana A. Neverova, Natalia V. Payandi-Rolland, Dahedrey Causserand, Carole Karlsson, Jan Pokrovsky, Oleg S. |
author_sort |
Shirokova, Liudmila S. |
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 |
HAL CCSD |
publishDate |
2019 |
url |
https://hal-insu.archives-ouvertes.fr/insu-03661419 https://hal-insu.archives-ouvertes.fr/insu-03661419/document https://hal-insu.archives-ouvertes.fr/insu-03661419/file/bg-16-2511-2019.pdf https://doi.org/10.5194/bg-16-2511-2019 |
genre |
Pechora permafrost Thermokarst |
genre_facet |
Pechora permafrost Thermokarst |
op_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal-insu.archives-ouvertes.fr/insu-03661419 Biogeosciences, 2019, 16, pp.2511-2526. ⟨10.5194/bg-16-2511-2019⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-16-2511-2019 insu-03661419 https://hal-insu.archives-ouvertes.fr/insu-03661419 https://hal-insu.archives-ouvertes.fr/insu-03661419/document https://hal-insu.archives-ouvertes.fr/insu-03661419/file/bg-16-2511-2019.pdf BIBCODE: 2019BGeo.16.2511S doi:10.5194/bg-16-2511-2019 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/bg-16-2511-2019 |
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Biogeosciences |
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16 |
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12 |
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2511 |
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2526 |
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