A comprehensive dataset of microbial abundance, dissolved organic carbon, and nitrogen in Tibetan Plateau glaciers

Liu, Yongqin; Fang, Pengcheng; Guo, Bixi; Ji, Mukan; Liu, Pengfei; Mao, Guannan; Xu, Bin; Kang, Shichang; Liu, Junzhi

doi:10.5194/essd-14-2303-2022

Cited by 9 publications

(10 citation statements)

References 46 publications

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“…Most of the snow metagenomes contained putative PET hydrolase sequences, followed by ice, and cryoconite (Figure 1B). This is consistent with the order of increasing carbon concentration in glacier habitats (Liu et al, 2022a). In addition, the relative abundance of putative PET hydrolases was also the highest in the Alps, followed by the Tibetan Plateau, while their relative abundance was relatively lower in the Antarctic and Arctic glaciers.…”

Section: Discussionsupporting

confidence: 89%

Glacier as a source of novel polyethylene terephthalate hydrolases

Qi,

Ji,

Yin

et al. 2023

Environmental Microbiology

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Polyethylene terephthalate (PET) is a major component of microplastic contamination globally, which is now detected in pristine environments including Polar and mountain glaciers. As a carbon‐rich molecule, PET could be a carbon source for microorganisms dwelling in glacier habitats. Thus, glacial microorganisms may be potential PET degraders with novel PET hydrolases. Here, we obtained 414 putative PET hydrolase sequences by searching a global glacier metagenome dataset. Metagenomes from the Alps and Tibetan glaciers exhibited a higher relative abundance of putative PET hydrolases than those from the Arctic and Antarctic. Twelve putative PET hydrolase sequences were cloned and expressed, with one sequence (designated as GlacPETase) proven to degrade amorphous PET film with a similar performance as IsPETase, but with a higher thermostability. GlacPETase exhibited only 30% sequence identity to known active PET hydrolases with a novel disulphide bridge location and, therefore may represent a novel PET hydrolases class. The present work suggests that extreme carbon‐poor environments may harbour a diverse range of known and novel PET hydrolases for carbon acquisition as an environmental adaptation mechanism.

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Section: Discussionsupporting

confidence: 89%

Glacier as a source of novel polyethylene terephthalate hydrolases

Qi,

Ji,

Yin

et al. 2023

Environmental Microbiology

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“…Habacuo (93°27′E, 30°10′N) covers an area of 0.863 km 2 and is a proglacial lake, serving as one of the sources of the Nyang River (Figure 1b). The Basongcuo (29°59′-30°04′N, 93°53′-94°01′E) is a glacier-fed lake located in Gongbo'gyamda county and spans an area of 2021) and Zhang, Ran, et al (2021) and Zhang, Kang, et al (2021) and glacier distribution was obtained from the second glacier inventory dataset of China (Liu et al, 2012).…”

Section: Study Areamentioning

confidence: 99%

“…There are 1,510 glacier-fed lakes with a total area of 158.97 km 2 (Chen 2021), Zhang, Ran, et al (2021) and Zhang, Kang, et al (2021). Glacier distribution was obtained from the second glacier inventory dataset of China (Liu et al, 2012. According to the global lithological map database (Hartmann & Moosdorf, 2012), the southeastern Tibetan Plateau is primarily composed of mixed sedimentary rocks, metamorphic rocks, acid plutonic rocks, and siliciclastic sedimentary rocks (Figure S1 in Supporting Information S1).…”

Section: Study Areamentioning

confidence: 99%

“…The database of glacier lakes distribution was obtained from the article (https:// doi.org/10.5194/essd-13-741-2021; https://doi.org/10.5194/essd-13-3951-2021). The glacier distribution database fromLiu et al (2012) was obtained the Second Glacier Inventory Dataset of China and can be downloaded from http://data.tpdc.ac.cn/zh-hans/. Hydrochemical dataset of the Basongcuo Lake from Luo et al (2021) was obtained from https://doi.org/10.19674/j.cnki.issn1000-6923.20210618.007.…”

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confidence: 99%

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Glacier‐Fed Lakes Are Significant Sinks of Carbon Dioxide in the Southeastern Tibetan Plateau

Zhu,

Kuang,

Song

et al. 2024

JGR Biogeosciences

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Dissolved inorganic carbon (DIC) sources, transportation, and transition in inland water bodies have been intensively studied due to their important role in the global carbon cycle. While glacier‐fed lakes play a crucial role in global carbon cycling, related studies are limited. In this study, we investigated the spatiotemporal variability of DIC in the maritime glacier‐fed lakes of the southeastern Tibetan Plateau, identifying the carbon sources and potential controlling factors of DIC pathways The results revealed significant temporal variations in DIC and δ13C‐DIC, with averages of 7.29 ± 0.45 mg C L−1 and –8.6 ± 0.2‰ in summer, and 3.40 ± 0.54 mg C L−1 and –7.4 ± 0.6‰ in winter, respectively. Temporal variations in DIC and δ13C‐DIC were mainly controlled by carbonates weathering and silicate weathering processes. The chemical weathering reactions facilitate the consumption of dissolved CO2. Undersaturated pCO2 (120.02 ± 29.18 μatm) relative to atmospheric equilibrium suggests considerable capacity for CO2 uptake within glacier‐fed lakes system. We estimated that the maritime glacier‐fed lakes in the southeastern Tibetan Plateau absorb a total of 9.6 ± 2.7 × 10−3 Tg C‐CO2 yr−1, highlighting their significant contribution to the global carbon budget. The distinctive landscape of the glacier‐fed system and the vulnerable weathering environment result in seasonal and spatial variations of DIC concentration and δ13C‐DIC values, as well as the chemical weathering‐induced CO2 sink in glacier regions. Given the accelerated glacier retreat observed in this area, further studies on the temporal variability of DIC in the water column are urgently needed to identify the mechanisms driving the biogeochemical reactions inside glacier‐fed lake. Our study highlights the unrecognized role of maritime glacier‐fed lakes as CO2 sinks and emphasizes their significance in regional carbon budgets.

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“…recorded the highest net radiation, 392.52 W/m 2 , and temperature ranged from −19.3 to 9.4 °C, with an average of −5.5 °C from May to July 2021 (unpublished data). In addition, the high elevation of ME also causes lower pressure than the standard atmospheric pressure (0.0033 MPa at the summit of Mount Everest) [ 13 ] and lower nutrient concentration than normal environments (e.g., in soils) [ 11 , 14 , 15 ]. These extreme environmental parameters challenge all life forms living in ME.…”

Section: Introductionmentioning

confidence: 99%

Comparison of prokaryotes between Mount Everest and the Mariana Trench

Liu

Zhang

et al. 2022

Microbiome

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Background Mount Everest and the Mariana Trench represent the highest and deepest places on Earth, respectively. They are geographically separated, with distinct extreme environmental parameters that provide unique habitats for prokaryotes. Comparison of prokaryotes between Mount Everest and the Mariana Trench will provide a unique perspective to understanding the composition and distribution of environmental microbiomes on Earth. Results Here, we compared prokaryotic communities between Mount Everest and the Mariana Trench based on shotgun metagenomic analysis. Analyzing 25 metagenomes and 1176 metagenome-assembled genomes showed distinct taxonomic compositions between Mount Everest and the Mariana Trench, with little taxa overlap, and significant differences in genome size, GC content, and predicted optimal growth temperature. However, community metabolic capabilities exhibited striking commonality, with > 90% of metabolic modules overlapping among samples of Mount Everest and the Mariana Trench, with the only exception for CO2 fixations (photoautotrophy in Mount Everest but chemoautotrophy in the Mariana Trench). Most metabolic pathways were common but performed by distinct taxa in the two extreme habitats, even including some specialized metabolic pathways, such as the versatile degradation of various refractory organic matters, heavy metal metabolism (e.g., As and Se), stress resistance, and antioxidation. The metabolic commonality indicated the overall consistent roles of prokaryotes in elemental cycling and common adaptation strategies to overcome the distinct stress conditions despite the intuitively huge differences in Mount Everest and the Mariana Trench. Conclusion Our results, the first comparison between prokaryotes in the highest and the deepest habitats on Earth, may highlight the principles of prokaryotic diversity: although taxa are habitat-specific, primary metabolic functions could be always conserved.

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A comprehensive dataset of microbial abundance, dissolved organic carbon, and nitrogen in Tibetan Plateau glaciers

Cited by 9 publications

References 46 publications

Glacier as a source of novel polyethylene terephthalate hydrolases

Glacier as a source of novel polyethylene terephthalate hydrolases

Glacier‐Fed Lakes Are Significant Sinks of Carbon Dioxide in the Southeastern Tibetan Plateau

Comparison of prokaryotes between Mount Everest and the Mariana Trench

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