scholarly journals Relative Roles of Deterministic and Stochastic Processes in Driving the Vertical Distribution of Bacterial Communities in a Permafrost Core from the Qinghai-Tibet Plateau, China

PLoS ONE ◽  
2015 ◽  
Vol 10 (12) ◽  
pp. e0145747 ◽  
Author(s):  
Weigang Hu ◽  
Qi Zhang ◽  
Tian Tian ◽  
Dingyao Li ◽  
Gang Cheng ◽  
...  
Keyword(s):  
Vertical Distribution ◽  
Stochastic Processes ◽  
Bacterial Communities ◽  
Tibet Plateau ◽  
Qinghai Tibet Plateau ◽  
The Vertical Distribution

Comparing Seasonal Diffences of Black Carbon in Tibetan Plateau transported from South Asia using WRF-Chem

2021 ◽  
Author(s):  
Shuoqiu Wu ◽  
Xiaoyan Ma
Keyword(s):  
South Asia ◽  
Black Carbon ◽  
Carbon Concentration ◽  
Wet Deposition ◽  
Emission Inventory ◽  
Tibet Plateau ◽  
Black Carbon Concentration ◽  
Different Seasons ◽  
Qinghai Tibet Plateau ◽  
The Vertical Distribution

<p>The melting of glaciers and snow on the Qinghai-Tibet Plateau, known as the Earth’s “Third Pole” and “World Water Tower”, is source of fresh water for hundreds of millions of people in South Asia, Southeast Asia, and East Asia, but it is now suffering from an unprecedented crisis. The black carbon deposited on the surface of the glacier will reduce the snow albedo and absorb more solar radiation, leading to accelerated melting of ice and snow.Previous studies have shown that black carbon from South Asia is one of the main sources of the Qinghai-Tibet Plateau, and the transportation of black carbon to the Qinghai-Tibet Plateau presents obviously seasonal differences.However, the transport of black carbon from South Asia to the Qinghai-Tibet Plateau in different seasons shows a completely opposite trend to wind field conditions.This study uses the WRF-Chem model to study the transmission mechanism of South Asian black carbon to the Tibetan Plateau in April (pre-monsoon), July (summer monsoon) and December (winter monsoon).MIX emission inventory and Peking University's global black carbon emission inventory (PKU-BC) were involved to analyze the seasonal distribution of black carbon concentration, dry and wet deposition in the Qinghai-Tibet Plateau and South Asia, and the distribution of BC concentration and wind field at different altitudes.Combined with the vertical distribution of BC concentration across the Himalayas, the transport mechanism of black carbon in South Asia to Qinghai-Tibet Plateau in different seasons is studied.In the selected three months, December had the highest surface black carbon concentration in South Asia and the Qinghai-Tibet Plateau, while July had the lowest black carbon concentration; Mainly because of the large amount of wet deposition of black carbon brought about by the heavy precipitation in South Asia in July;According to the vertical distribution of black carbon,black carbon can climb up the hillside and eventually reach the southern slope of the Qinghai-Tibet Plateau in April. In July, black carbon is mainly distributed below 3km. In December, black carbon can be uplifted to 4-5km, and finally transported into Qinghai-Tibet Plateau.</p>

Vertical distribution of radionuclides in Lake Qinghai, Qinghai-Tibet Plateau, and its environmental implications

Chemosphere ◽  
2020 ◽  
Vol 259 ◽  
pp. 127489
Author(s):  
Qiugui Wang ◽  
Zhanjiang Sha ◽  
Jinlong Wang ◽  
Qiangqiang Zhong ◽  
Penggao Fang ◽  
...  
Keyword(s):  
Vertical Distribution ◽  
Tibet Plateau ◽  
Lake Qinghai ◽  
Environmental Implications ◽  
Qinghai Tibet Plateau

scholarly journals Large‐scale distribution of bacterial communities in the Qaidam Basin of the Qinghai–Tibet Plateau

2019 ◽  
Vol 8 (10) ◽  
Author(s):  
Rui Xing ◽  
Qing‐bo Gao ◽  
Fa‐qi Zhang ◽  
Jiu‐li Wang ◽  
Shi‐long Chen
Keyword(s):  
Bacterial Communities ◽  
Large Scale ◽  
Qaidam Basin ◽  
Tibet Plateau ◽  
Qinghai Tibet Plateau

The vertical distribution of tetA and intI1 in a deep lake is rather due to sedimentation than to resuspension

2020 ◽  
Vol 96 (2) ◽  
Author(s):  
Andrea Di Cesare ◽  
Ester M Eckert ◽  
Camille Cottin ◽  
Agnès Bouchez ◽  
Cristiana Callieri ◽  
...  
Keyword(s):  
Vertical Distribution ◽  
Water Column ◽  
Bacterial Communities ◽  
Antibiotic Resistance Genes ◽  
Tetracycline Resistance ◽  
Anthropogenic Pollution ◽  
Class 1 Integron ◽  
Integrase Gene ◽  
The Vertical Distribution ◽  
Sediment Interface

ABSTRACT Lakes are exposed to anthropogenic pollution including the release of allochthonous bacteria into their waters. Antibiotic resistance genes (ARGs) stabilize in bacterial communities of temperate lakes, and these environments act as long-term reservoirs of ARGs. Still, it is not clear if the stabilization of the ARGs is caused by a periodical introduction, or by other factors regulated by dynamics within the water column. Here we observed the dynamics of the tetracycline resistance gene (tetA) and of the class 1 integron integrase gene intI1 a proxy of anthropogenic pollution in the water column and in the sediments of subalpine Lake Maggiore, together with several chemical, physical and microbiological variables. Both genes resulted more abundant within the bacterial community of the sediment compared to the water column and the water-sediment interface. Only at the inset of thermal stratification they reached quantifiable abundances in all the water layers, too. Moreover, the bacterial communities of the water-sediment interface were more similar to deep waters than to the sediments. These results suggest that the vertical distribution of tetA and intI1 is mainly due to the deposition of bacteria from the surface water to the sediment, while their resuspension from the sediment is less important.

Vertical distribution of Pu in forest soil in Qinghai-Tibet Plateau

2021 ◽  
Vol 229-230 ◽  
pp. 106548
Author(s):  
Yongjin Guan ◽  
Peijun Zhang ◽  
Chunping Huang ◽  
Deyu Wang ◽  
Xianggao Wang ◽  
...  
Keyword(s):  
Vertical Distribution ◽  
Forest Soil ◽  
Tibet Plateau ◽  
Qinghai Tibet Plateau

scholarly journals Responses of Bacterial Communities to Simulated Climate Changes in Alpine Meadow Soil of the Qinghai-Tibet Plateau

2015 ◽  
Vol 81 (17) ◽  
pp. 6070-6077 ◽  
Author(s):  
Junpeng Rui ◽  
Jiabao Li ◽  
Shiping Wang ◽  
Jiaxing An ◽  
Wen-tso Liu ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Climate Warming ◽  
Bacterial Communities ◽  
Bacterial Community Structure ◽  
Climate Changes ◽  
Tibet Plateau ◽  
Content Type ◽  
Soil Bacterial Communities ◽  
Soil Bacterial ◽  
Qinghai Tibet Plateau

ABSTRACTThe soil microbial community plays an important role in terrestrial carbon and nitrogen cycling. However, microbial responses to climate warming or cooling remain poorly understood, limiting our ability to predict the consequences of future climate changes. To address this issue, it is critical to identify microbes sensitive to climate change and key driving factors shifting microbial communities. In this study, alpine soil transplant experiments were conducted downward or upward along an elevation gradient between 3,200 and 3,800 m in the Qinghai-Tibet plateau to simulate climate warming or cooling. After a 2-year soil transplant experiment, soil bacterial communities were analyzed by pyrosequencing of 16S rRNA gene amplicons. The results showed that the transplanted soil bacterial communities became more similar to those in their destination sites and more different from those in their “home” sites. Warming led to increases in the relative abundances inAlphaproteobacteria,Gammaproteobacteria, andActinobacteriaand decreases inAcidobacteria,Betaproteobacteria, andDeltaproteobacteria, while cooling had opposite effects on bacterial communities (symmetric response). Soil temperature and plant biomass contributed significantly to shaping the bacterial community structure. Overall, climate warming or cooling shifted the soil bacterial community structure mainly through species sorting, and such a shift might correlate to important biogeochemical processes such as greenhouse gas emissions. This study provides new insights into our understanding of soil bacterial community responses to climate warming and cooling.

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