Correlation Engine 2.0
Clear Search sequence regions

  • carbon (2)
  • communities (10)
  • gas (1)
  • gases (1)
  • methanogenesis (1)
  • nitrogen (4)
  • nutrient (1)
  • phosphate (1)
  • phosphodiesterases (1)
  • river (4)
  • sulfur (1)
  • Sizes of these terms reflect their relevance to your search.

    Thermokarst lakes have long been recognized as biogeochemical hotspots, especially as sources of greenhouse gases. On the Qinghai-Tibet Plateau, thermokarst lakes are experiencing extensive changes due to faster warming. For a deep understanding of internal lake biogeochemical processes, we applied metagenomic analyses to investigate the microbial diversity and their biogeochemical roles in sediment and water of thermokarst lakes in the Yellow River Source Area (YRSA). Sediment microbial communities (SMCs) had lower species and gene richness than water microbial communities (WMCs). Bacteria were the most abundant component in both SMCs and WMCs with significantly different abundant genera. The functional analyses showed that both SMCs and WMCs had low potential in methanogenesis but strong in aerobic respiration, nitrogen assimilation, exopolyphosphatase, glycerophosphodiester phosphodiesterases, and polyphosphate kinase. Moreover, SMCs were enriched in genes involved in anaerobic carbon fixation, aerobic carbon fixation, fermentation, most nitrogen metabolism pathways, dissimilatory sulfate reduction, sulfide oxidation, polysulfide reduction, 2-phosphonopropionate transporter, and phosphate regulation. WMCs were enriched in genes involved in assimilatory sulfate reduction, sulfur mineralization, phosphonoacetate hydrolase, and phosphonate transport. Functional potentials suggest the differences of greenhouse gas emission, nutrient cycling, and living strategies between SMCs and WMCs. This study provides insight into the main biogeochemical processes and their properties in thermokarst lakes in YRSA, improving our understanding of the roles and fates of these lakes in a warming world. © 2022. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.


    Ze Ren, Kang Ma, Xuan Jia, Qing Wang, Cheng Zhang, Xia Li. Metagenomics Unveils Microbial Diversity and Their Biogeochemical Roles in Water and Sediment of Thermokarst Lakes in the Yellow River Source Area. Microbial ecology. 2023 Apr;85(3):904-915

    Expand section icon Mesh Tags

    Expand section icon Substances

    PMID: 35650293

    View Full Text