Greenhouse gas production and lipid biomarker distribution in Yedoma and Alas thermokarst lake sediments in Eastern Siberia.
Yakutia
anaerobic
greenhouse gases
incubation experiments
lipid biomarkers
organic matter degradation
permafrost thaw
talik
Journal
Global change biology
ISSN: 1365-2486
Titre abrégé: Glob Chang Biol
Pays: England
ID NLM: 9888746
Informations de publication
Date de publication:
Jun 2021
Jun 2021
Historique:
received:
09
10
2020
accepted:
08
02
2021
pubmed:
29
3
2021
medline:
28
5
2021
entrez:
28
3
2021
Statut:
ppublish
Résumé
Permafrost thaw leads to thermokarst lake formation and talik growth tens of meters deep, enabling microbial decomposition of formerly frozen organic matter (OM). We analyzed two 17-m-long thermokarst lake sediment cores taken in Central Yakutia, Russia. One core was from an Alas lake in a Holocene thermokarst basin that underwent multiple lake generations, and the second core from a young Yedoma upland lake (formed ~70 years ago) whose sediments have thawed for the first time since deposition. This comparison provides a glance into OM fate in thawing Yedoma deposits. We analyzed total organic carbon (TOC) and dissolved organic carbon (DOC) content, n-alkane concentrations, and bacterial and archaeal membrane markers. Furthermore, we conducted 1-year-long incubations (4°C, dark) and measured anaerobic carbon dioxide (CO
Substances chimiques
Biomarkers
0
Greenhouse Gases
0
Lipids
0
Methane
OP0UW79H66
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
2822-2839Subventions
Organisme : Deutsche Bundesstiftung Umwelt
Organisme : HGF Initiative and Networking Fund
ID : ERC_0013
Organisme : Bundesministerium für Bildung und Forschung
ID : 03F0764A
Organisme : Bundesministerium für Bildung und Forschung
ID : 03F0764B
Organisme : Bundesministerium für Bildung und Forschung
ID : 03F0764F
Organisme : Deutsche Forschungsgemeinschaft
ID : EXC 2017
Organisme : Deutsche Forschungsgemeinschaft
ID : UL426/1-1
Organisme : H2020 European Research Council
ID : 338335
Informations de copyright
© 2021 The Authors. Global Change Biology published by John Wiley & Sons Ltd.
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