Metagenomics Unveils Microbial Diversity and Their Biogeochemical Roles in Water and Sediment of Thermokarst Lakes in the Yellow River Source Area

Ren, Ze; Ma, Kang; Jia, Xuan; Wang, Qing; Zhang, Cheng; Li, Xia

doi:10.1007/s00248-022-02053-1

Cited by 6 publications

(7 citation statements)

References 88 publications

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“…The geochemical conditions in these lakes suppress methanogenesis but facilitate CH 4 oxidation, resulting in CO 2 levels that could be at least an order of magnitude higher than those of CH 4 . 23,26 In addition, saline and alkaline conditions in thermokarst lakes on the QTP were observed to be associated with a high carbon fractionation factor (α C : 1.064 ± 0.001, n = 29) of δ 13 C-CH 4 . 24 Moreover, QTP permafrost has a lower peat content than Arctic permafrost.…”

Section: Ghg Fluxes From Permafrost Landscapesmentioning

confidence: 98%

“…Studies on thermokarst lakes on the QTP have demonstrated a close relationship between dissolved CH 4 concentration and the biodiversity of methanogens and methanotrophs 110 . Microbial functionality can be dramatically changed by high ionic geochemistry in thermokarst ecosystems, as manifested by the arctic coastal thermokarst lagoons and the saline thermokarst lakes on the QTP 26,52 . In the arctic coastal thermokarst lagoons, marine water invasion introduces a sulfate‐rich geochemical profile, facilitating sulfate‐dependent ANME consortia that effectively mitigate CH 4 emissions, 52 while the saline thermokarst lakes (pH 8.2–9.5 in water and 9.3–9.8 in sediment) in the Yellow River source area on the QTP permafrost region greatly suppress methanogenesis 26 .…”

Section: Microbiomes In Thermokarst Systemmentioning

confidence: 99%

“…GHG fluxes in different permafrost landscapes are fundamental to PCF. Within the climate warming effect, methane (CH 4 ) has [25][26][27][28][29][30] times greater potency than CO 2 on a 100-year timescale. Figure 1 provides an overview of the emission rates of CH 4 and CO 2 from terrestrial permafrost and thermokarst lakes, covering various regions and ecosystems.…”

Section: Ghg Fluxes From Permafrost Landscapesmentioning

confidence: 99%

“…Microbial community and functionality are greatly regulated by the geochemistry of thermokarst lakes, as evidenced by various studies in the Arctic and on the QTP. 23,26,52,110 The distinctive saline and alkaline geochemistry of QTP thermokarst lakes were associated with the relative proportion of GHGs and dominant methanogenesis pathway. 16,24 Thermokarst lakes are usually stratified irrespective of their shallow depths, resulting in the separation of oxic and anoxic habitats downwards to lake sediments.…”

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confidence: 99%

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Carbon‐cycling microorganisms in permafrost and their responses to a warming climate: A review

Yang,

Wen,

et al. 2023

Permafrost & Periglacial

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Global climate warming is accelerating permafrost degradation. The large amounts of soil organic matter in permafrost‐affected soils are prone to increased microbial decomposition in a warming climate. Along with permafrost degradation, changes to the soil microbiome play a crucial role in enhancing our understanding and in predicting the feedback of permafrost carbon. In this article, we review the current state of knowledge of carbon‐cycling microbial ecology in permafrost regions. Microbiomes in degrading permafrost exhibit variations across spatial and temporal scales. Among the short‐term, rapid degradation scenarios, thermokarst lakes have distinct biogeochemical conditions promoting emission of greenhouse gases. Additionally, extreme climatic events can trigger drastic changes in microbial consortia and activity. Notably, environmental conditions appear to exert a dominant influence on microbial assembly in permafrost ecosystems. Furthermore, as the global climate is closely connected to various permafrost regions, it will be crucial to extend our understanding beyond local scales, for example by conducting comparative and integrative studies between Arctic permafrost and alpine permafrost on the Qinghai–Tibet Plateau at global and continental scales. These comparative studies will enhance our understanding of microbial functioning in degrading permafrost ecosystems and help inform effective strategies for managing and mitigating the impacts of climate change on permafrost regions.

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Section: Ghg Fluxes From Permafrost Landscapesmentioning

confidence: 98%

Section: Microbiomes In Thermokarst Systemmentioning

confidence: 99%

Section: Ghg Fluxes From Permafrost Landscapesmentioning

confidence: 99%

mentioning

confidence: 99%

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Carbon‐cycling microorganisms in permafrost and their responses to a warming climate: A review

Yang,

Wen,

et al. 2023

Permafrost & Periglacial

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“…In the last decade, microbial communities in thermokarst lakes have garnered increasing attention (Bergstresser, 2018; Bomberg et al, 2019; Comte et al, 2016; Kluge et al, 2021; Moigne et al, 2020; Negandhi et al, 2014; Ren et al, 2023; Wurzbacher et al, 2017). Previous work has shown high variability in these communities, with even lakes in the same region sometimes having different taxonomic compositions (Comte et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Patterns and drivers of prokaryotic communities in thermokarst lake water across Northern Hemisphere

Kang,

Chen,

et al. 2023

Global Ecol Biogeogr

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AimThe formation of thermokarst lakes could make a large amount of carbon accessible to microbial degradation, potentially intensifying the permafrost carbon‐climate feedback via carbon dioxide/methane emissions. Because of their diverse functional roles, prokaryotes could strongly mediate biogeochemical cycles in thermokarst lakes. However, little is known about the large‐scale patterns and drivers of these communities.LocationPermafrost regions in the Northern Hemisphere.Time periodPresent day.Major taxa studiedProkaryotes.MethodsBased on a combination of large‐scale measurements on the Tibetan Plateau and data syntheses in pan‐Arctic regions, we constructed a comprehensive dataset of 16S rRNA sequences from 258 thermokarst lakes across Northern Hemisphere permafrost regions. We also used the local contributions to beta diversity (LCBD) to characterize the variance of prokaryotic species composition and screened underlying drivers by conducting a random forest modelling analysis.ResultsProkaryotes in thermokarst lake water were dominated by the orders Burkholderiales, Micrococcales, Flavobacteriales and Frankiales. The relative abundance of dominant taxa was positively associated with dissolved organic matter (DOM) properties, especially for the chromophoric/aromatic compounds. Microbial structure differed between high‐altitude and high‐latitude thermokarst lakes, with the dominance of Flavobacterium in high‐altitude lakes, and the enrichment of Polynucleobacter in high‐latitude lakes. More importantly, climatic variables were among the main drivers shaping the large‐scale variation of prokaryotic communities. Specifically, mean annual precipitation was the best predictor for prokaryotic beta diversity across the Northern Hemisphere, as well as in the high‐altitude permafrost regions, while mean annual air temperature played a key role in the high‐latitude thermokarst lakes.Main conclusionsOur findings demonstrate significant associations between dominant taxa and DOM properties, as well as the important role of climatic factors in affecting prokaryotic communities. These findings suggest that climatic change may alter DOM conditions and induce dynamics in prokaryotic communities of thermokarst lake water in the Northern Hemisphere.

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Soil metagenomics reveals reduced tillage improves soil functional profiles of carbon, nitrogen, and phosphorus cycling in bulk and rhizosphere soils

Hu,

Liu,

Liang

et al. 2025

Agriculture, Ecosystems & Environment

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Metagenomics Unveils Microbial Diversity and Their Biogeochemical Roles in Water and Sediment of Thermokarst Lakes in the Yellow River Source Area

Cited by 6 publications

References 88 publications

Carbon‐cycling microorganisms in permafrost and their responses to a warming climate: A review

Carbon‐cycling microorganisms in permafrost and their responses to a warming climate: A review

Patterns and drivers of prokaryotic communities in thermokarst lake water across Northern Hemisphere

Soil metagenomics reveals reduced tillage improves soil functional profiles of carbon, nitrogen, and phosphorus cycling in bulk and rhizosphere soils

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