Bacterial community composition and diversity in Kalakuli, an alpine glacial-fed lake in Muztagh Ata of the westernmost Tibetan Plateau

Liu, Keshao; Liu, Yongqin; Jiao, Nianzhi; Xu, Bin; Gu, Zhengquan; Xing, Tingting; Xiong, Jinbo

doi:10.1093/femsec/fix085

Cited by 28 publications

(14 citation statements)

References 52 publications

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“…The temperature in October 2015 (10.7 • C) was lower by about 1 • C than in (MetÉireann 2018. The strong relationship between temperature and variations in bacterial community composition was reported previously (L Liu et al 2013;K Liu et al 2017). Other studies demonstrated that temperature is one of the main parameters driving the change in bacterial comm0unity composition (Crump and Hobbie 2005;W Zhang et al 2014).…”

Section: Visualization Of Community Compositionsupporting

confidence: 61%

16S rRNA gene based bacterial community structure of wastewater treatment plant effluents

Thuy

Delaney

Walsh

2019

FEMS Microbiology Letters

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There is little known about the wastewater treatment plant (WWTP) effluent microbiome, its structure and dynamics. Here, we provide a study of the microbiome of effluent leaving conventional WWTPs and entering the water environment. DNA was extracted from WWTP effluent samples collected in 2015 and 2016. The bacterial communities were studied using Illumina MiSeq 16S rRNA gene amplicon sequencing and analysed using Calypso software. The Proteobacteria, Bacteroides, Actinobacteria, Firmicutes, Tenericutes and Verrucomicrobia phyla dominated the microbiomes. The bacterial community composition at high taxonomic levels is consistent between the tested WWTP effluents, and in agreement with previous studies of WWTP effluents in different global locations. The analysed microbiomes of the WWTPs shared high similarities with human faecal microbiome and contained potential human pathogens. The bacterial phyla/class composition of the bacterial communities varied greatly in both WWTP effluents in October 2015. The bacterial diversity was slightly different between studied WWTPs. Two main bacterial clusters were detected in all samples during all sampling periods. In conclusion, this work highlights the need for a better understanding of the bacterial communities in WWTP effluent. This data should be considered when analysing the risk posed by WWTP effluent to the environment and to human health.

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Section: Visualization Of Community Compositionsupporting

confidence: 61%

16S rRNA gene based bacterial community structure of wastewater treatment plant effluents

Thuy

Delaney

Walsh

2019

FEMS Microbiology Letters

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“…Meanwhile, glaciers are recognized as one of the biomes of Earth and harbour a diverse group of microbes (Anesio and Laybourn‐Parry, 2012; Hotaling et al ., 2017), thus glacier can act as reservoirs and sources of microbial diversity for downstream environments (Hauptmann et al ., 2016; Peter and Sommaruga, 2016; Cameron et al ., 2017; Ren et al ., 2019). Glaciers can also serve as a source of carbon and nutrients to support downstream microbial communities (Singer et al ., 2012; Hood et al ., 2015; Liu et al ., 2017). Further, rapid glacier melting results in the fluctuations of the physicochemical characteristics in glacier‐fed aquatic environments (e.g., streams and lakes), ultimately affecting microbial biodiversity within downstream hydrologic continuum (Jacobsen et al ., 2012; Milner et al ., 2017; Liu et al ., 2019).…”

Section: Introductionmentioning

confidence: 99%

Fate of glacier surface snow‐originating bacteria in the glacier‐fed hydrologic continuums

Liu

et al. 2021

Environmental Microbiology

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Summary Glaciers represent important biomes of Earth and are recognized as key species pools for downstream aquatic environments. Worldwide, rapidly receding glaciers are driving shifts in hydrology, species distributions and threatening microbial diversity in glacier‐fed aquatic ecosystems. However, the impact of glacier surface snow‐originating taxa on the microbial diversity in downstream aquatic environments has been little explored. To elucidate the contribution of glacier surface snow‐originating taxa to bacterial diversity in downstream aquatic environments, we collected samples from glacier surface snows, downstream streams and lakes along three glacier‐fed hydrologic continuums on the Tibetan Plateau. Our results showed that glacier stream acts as recipients and vectors of bacteria originating from the glacier environments. The contributions of glacier surface snow‐originating taxa to downstream bacterial communities decrease from the streams to lakes, which was consistently observed in three geographically separated glacier‐fed ecosystems. Our results also revealed that some rare snow‐originating bacteria can thrive along the hydrologic continuums and become dominant in downstream habitats. Finally, our results indicated that the dispersal patterns of bacterial communities are largely determined by mass effects and increasingly subjected to local sorting of species along the glacier‐fed hydrologic continuums. Collectively, this study provides insights into the fate of bacterial assemblages in glacier surface snow following snow melt and how bacterial communities in aquatic environments are affected by the influx of glacier snow‐originating bacteria.

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“…Most previous research on bacterial metagenomics has focused on marine environments (e.g., Aravindraja, Karutha, & Pandian, ; Hagström et al., ) or lowland lakes (Newton, Jones, Eiler, McMahon, & Bertilsson, and references therein). High‐altitude alpine lakes have recently received some attention because of their enhanced vulnerability to climate change (e.g., Filker, Sommaruga, Vila, & Stoeck, ; Liu et al., ). However, lakes at intermediate altitude also merit our consideration because they are exposed not only to climate change but also to human impacts, and they are also quite abundant in certain geographical regions (Obertegger, Borsato, & Flaim, ).…”

Section: Introductionmentioning

confidence: 99%

Temporal variability of bacterioplankton is habitat driven

et al. 2018

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Temporal dynamics of bacterioplankton are rarely investigated for multiple habitats and years within individual lakes, limiting our understanding of the variability of bacterioplankton community (BC) composition with respect to environmental factors. We assessed the BC composition of a littoral and two pelagic habitats (euphotic zone and hypolimnion) of Lake Tovel monthly from April 2014 to May 2017 by high-throughput sequencing of the V3-V4 hypervariable region of the 16S rRNA gene. The three habitats differed in temperature, light, oxygen and hydrology. In particular, the littoral was the most hydrologically unstable because it receives most of the lake inflow, the hypolimnion was the most stable because of its hydrologically sheltered position, and the pelagic euphotic habitat was intermediate. Consequently, we hypothesized different temporal patterns of BC composition for all three habitats according to their environmental differences. We applied PERMANOVA, nonmetric multidimensional scaling and source-sink analysis to characterize BC composition. Overall, BCs were different among habitats with the littoral showing the highest variability and the hypolimnion the highest stability. The BC of rainy 2014 was distinct from the BCs of other years irrespective of the habitats considered. Seasonal differences in BCs were limited to spring, probably linked to meltwater inflow and mixing. Thus, temporal effects related to year and season were linked to the hydrological gradient of habitats. We suggest that despite potential within-lake dispersal of bacterioplankton by water flow and mixing, local environmental conditions played a major role in Lake Tovel, fostering distinct BCs in the three habitats.

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Bacterial community composition and diversity in Kalakuli, an alpine glacial-fed lake in Muztagh Ata of the westernmost Tibetan Plateau

Cited by 28 publications

References 52 publications

16S rRNA gene based bacterial community structure of wastewater treatment plant effluents

16S rRNA gene based bacterial community structure of wastewater treatment plant effluents

Fate of glacier surface snow‐originating bacteria in the glacier‐fed hydrologic continuums

Temporal variability of bacterioplankton is habitat driven

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