Trajectories of freshwater microbial genomics and greenhouse gas saturation upon glacial retreat

Due to climate warming, ice sheets around the world are losing mass, contributing to changes across terrestrial landscapes on decadal time spans. However, landscape repercussions on climate are poorly constrained mostly due to limited knowledge on microbial responses to deglaciation. Here, we reveal...

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Bibliographic Details
Published in:Nature communications 2023-06, Vol.14 (1), p.3234-12, Article 3234
Main Authors: Wei, Jing, Fontaine, Laurent, Valiente, Nicolas, Dörsch, Peter, Hessen, Dag O., Eiler, Alexander
Format: Article
Language:English
Subjects:
140/58
45/22
45/23
45/77
631/158/2165
631/326/171/1878
704/47/4112
Animals
Arctic Regions
Bird populations
Birds
Carbon
Carbon cycle
Chemoautotrophy
Climate change
Deglaciation
Ecological succession
Feedback
Feedback loops
Fertilization
Freshwater lakes
Genomics
Glaciers
Global warming
Greenhouse effect
Greenhouse Gases
Heterotrophy
Humanities and Social Sciences
Ice sheets
Lakes
Landscape
Methane
Methanotrophic bacteria
Microorganisms
Modulators
multidisciplinary
Nitrogen
Nitrogen cycle
Nitrous oxide
Positive feedback
Science
Science (multidisciplinary)
Supersaturation
Svalbard
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Summary:Due to climate warming, ice sheets around the world are losing mass, contributing to changes across terrestrial landscapes on decadal time spans. However, landscape repercussions on climate are poorly constrained mostly due to limited knowledge on microbial responses to deglaciation. Here, we reveal the genomic succession from chemolithotrophy to photo- and heterotrophy and increases in methane supersaturation in freshwater lakes upon glacial retreat. Arctic lakes at Svalbard also revealed strong microbial signatures form nutrient fertilization by birds. Although methanotrophs were present and increased along lake chronosequences, methane consumption rates were low even in supersaturated systems. Nitrous oxide oversaturation and genomic information suggest active nitrogen cycling across the entire deglaciated landscape, and in the high Arctic, increasing bird populations serve as major modulators at many sites. Our findings show diverse microbial succession patterns, and trajectories in carbon and nitrogen cycle processes representing a positive feedback loop of deglaciation on climate warming. Diverse microbial trajectories in carbon and nitrogen cycle processes represent a positive feedback loop of deglaciation on climate warming.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-023-38806-w