Soil Properties and Microbial Diversity at the Frontier of Laohugou Glacier Retreat in Qilian Mountains

Zhu, Y.; Zhang, Shujun; Wang, Yaqi; Cao, Fu-qian; Sun, Weiyi; Qi, Xiaoyu; Zhao, Yucui; Xu, Fei

doi:10.1007/s00284-019-01846-x

Cited by 7 publications

(23 citation statements)

References 45 publications

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“…In the present study, the pH of lake-debris was higher (slightly alkaline) than of melt-water (neutral), which is in agreement with the results of Zhu et al [44] and Sajjad et al [7], who studied the frontiers of Laohugou glacier No. 12 and Baishui glacier No.…”

Section: Discussionsupporting

confidence: 93%

“…Chloroflexi and Cyanobacteria in lake-debris demonstrated that photosynthetic autotrophs preferred lake-debris to colonize [23,63], which could be linked to the late periods of ecological succession [23]. These findings are in agreement with Zhu et al [44] and Ali et al [6] in glacial habitats. Liu et al [64] correlated the organic carbon accumulated in the soil with the photosynthetic genes cbbL abundance of Cyanobacteria.…”

Section: Discussionsupporting

confidence: 88%

“…Firmicutes consist of several endospore-forming taxa that withstand harsh environmental conditions [57]. Actinobacteria was reported as the major bacterial group in freshwater; however, this phylum was observed in the lake-debris in this study, consistent with the cryospheric environments' reports [7,23,44]. The culture-dependent studies of bacterial diversity showed that phyla including Proteobacteria, Firmicutes, and Actinobacteria were common in glacial environments [58][59][60].…”

Section: Discussionsupporting

confidence: 68%

“…The retrieved sequences were mostly assigned to Proteobacteria and Firmicutes, two phyla that commonly exist in glacial environments and possess versatile metabolic activities [7]. Recently, Zhu et al [44] and Sajjad et al [7] identified Proteobacteria as the dominant phylum at the Laohugou and Baishui glaciers, respectively. In the present study, lakedebris was dominated by Proteobacteria, which could be attributed to the fast-growing members present in this group [53], and they easily degrade and metabolize organic matter [54].…”

Section: Discussionmentioning

confidence: 99%

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Diversity, distribution, and function of bacteria in the supraglacial region hit by glacial lake outburst flood in northern Pakistan

et al. 2022

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Background Glaciers of the Hindu Kush region are highly susceptible to climate change. Recently, a severe glacial lake outburst flood (GLOF) hit the supraglacial region at the frontier of Dook Pal Glacier. Information on the bacterial community in a freshly appeared supraglacial lake after GLOF is essential to probe the bacterial distribution pattern after immediate unlocking from the supraglacial region. After GLOF, geochemistry and bacterial diversity, distribution, community structure, and function were examined in the lake-debris and melt-water. Results In general, concentrations of dissolved free amino acids were similar between lake-debris and melt-water, potentially toxic elements and cations were greater in lake-debris, and anions concentrations were greater in melt-water. In addition, there was comparable diversity in the glacial melt-water and lake-debris; Proteobacteria dominated in lake-debris (33.1–94.5%), while Proteobacteria (36.7–50.5%) and Firmicutes (44–62%) dominated in melt-water. It is more likely that Proteobacteria and Firmicutes shifted towards melt-water after GLOF, creating an uneven distribution of communities in the lake-debris; however, a relatively even distribution was maintained in melt-water. Genes responsible for metabolism and energy production were higher in lake-debris than in melt-water bacteria; whereas, genes for other cellular mechanisms were higher in melt-water than in lake-debris bacteria. Conclusions This study offers valuable datasets in understanding the bacterial diversity, distribution and function as a consequence of GLOF at the glacial frontier.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 88%

Section: Discussionsupporting

confidence: 68%

Section: Discussionmentioning

confidence: 99%

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Diversity, distribution, and function of bacteria in the supraglacial region hit by glacial lake outburst flood in northern Pakistan

et al. 2022

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“…The decomposition process depends on soil development, given related changes in soil physicochemical features and the colonization, growth, and activity of microorganisms that underlie decomposition (Bardgett et al 2005;Wang et al 2020;Zhu et al 2020). Here after approximately seventy years of soil development, we found that belowground decomposition was significantly associated with increases in C:N and decreases in soil pH ( Figure S1).…”

Section: Belowground Decomposition During Soil Developmentmentioning

confidence: 84%

Soil microbial abundance and activity across forefield glacier chronosequence in the Northern Patagonian Ice Field, Chile

Alfaro

Salazar-Burrows

Bañales-Seguel

et al. 2020

Arctic, Antarctic, and Alpine Research

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In recently deglaciated soils, microbial organisms drive soil transformations by increasing carbon (C) and nitrogen (N) pools while depleting available phosphorous (P), thus improving plant colonization and soil development. However, the rate of soil development can vary in response to local environmental conditions that affect microbial abundance and activity. In this contribution we use observational and experimental approaches to evaluate the interplay between soil biogeochemical features and microbial abundance and function after approximately seventy years of soil development in the forefield of the Exploradores Glacier that is located at the northernmost end of the Northern Patagonian Ice Field. Our findings suggest that after approximately seventy years of soil development, microbial abundance and soil C and N accumulation increase with soil age, soil bulk density and pH decreased, and microbial activity measured as soil chlorophyll a and nifH gene abundance increased. In turn, decomposition increased with fungal abundance, showing higher values in the late stages of soil development where the soil C:N ratio was higher and soil pH was lower. Overall, biogeochemical changes along this chronosequence followed the predicted pattern, with gradual increases in soil nutrients and microbial abundance, in addition to decomposition processes.

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Bacterial Diversity and Communities Structural Dynamics in Soil and Meltwater Runoff at the Frontier of Baishui Glacier No.1, China

et al. 2020

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Soil Properties and Microbial Diversity at the Frontier of Laohugou Glacier Retreat in Qilian Mountains

Cited by 7 publications

References 45 publications

Diversity, distribution, and function of bacteria in the supraglacial region hit by glacial lake outburst flood in northern Pakistan

Diversity, distribution, and function of bacteria in the supraglacial region hit by glacial lake outburst flood in northern Pakistan

Soil microbial abundance and activity across forefield glacier chronosequence in the Northern Patagonian Ice Field, Chile

Bacterial Diversity and Communities Structural Dynamics in Soil and Meltwater Runoff at the Frontier of Baishui Glacier No.1, China

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