Actinobacterial Community Structure in Sediment from Lop Nur Salt Lake

2013 ◽  
Vol 19 (3) ◽  
pp. 466-470
Author(s):  
Tongwei GUAN ◽  
Zhenming CHE ◽  
Wenliang XIANG ◽  
Yun TENG ◽  
Xiaoping ZHANG ◽  
...  
Keyword(s):  
Community Structure ◽  
Salt Lake ◽  
Lop Nur

scholarly journals New inventory of dust sources in Central Asia derived from the daily MODIS imagery

2019 ◽  
Vol 99 ◽  
pp. 01001 ◽  
Author(s):  
Mohamad Nobakht ◽  
Maria Shahgedanova ◽  
Kevin White
Keyword(s):  
Central Asia ◽  
Salt Lake ◽  
Dust Emission ◽  
Point Sources ◽  
Western China ◽  
Study Region ◽  
Dust Emissions ◽  
Lop Nur ◽  
Modis Imagery ◽  
Ustyurt Plateau

This paper presents the first inventory of dust emission sources in Central Asia and western China (35-50°N, 50-100°E) derived from the twice daily MODIS imagery from 2003-2012. The high-resolution (1 km) dust enhancement product was generated and used to produce maps of dust point sources and gridded data sets of dust emission frequencies. The most active dust emissions were observed in the eastern part of the Tarim basin (Lop Nur salt lake) followed by the Aralkum. A high frequency of dust emissions was recorded in the regions which were not reported in literature to date: the upper Amudarya region in northern Afghanistan and the Pre-Aral region (from the Ustyurt Plateau to the Betpak Dala desert). Dust emissions were associated mainly with the fluvial features (dry river beds and lakes), agricultural activities and fire damage to vegetation. In the eastern and northern parts of the study region and in the Aralkum, dust emissions peaked in spring while in the western and southern parts, they peaked in summer. The Aralkum exhibited a consistent growth in the frequency and intensity of dust emissions and similar but weaker trends were observed in the Karakum and Kyzylkum.

Features and Formation Mechanism of Faults and Potash-forming Effect in the Lop Nur Salt Lake, Xinjiang, China

2010 ◽  
Vol 80 (6) ◽  
pp. 936-943 ◽  
Author(s):  
LIU Chenglin ◽  
WANG Mili ◽  
JIAO Pengcheng ◽  
LI Shude ◽  
CHEN Yongzhi
Keyword(s):  
Formation Mechanism ◽  
Salt Lake ◽  
Lop Nur

scholarly journals Phylogenetic Diversities and Community Structure of Members of the Extremely Halophilic Archaea (Order Halobacteriales) in Multiple Saline Sediment Habitats

2011 ◽  
Vol 78 (5) ◽  
pp. 1332-1344 ◽  
Author(s):  
Noha H. Youssef ◽  
Kristen N. Ashlock-Savage ◽  
Mostafa S. Elshahed
Keyword(s):  
Community Structure ◽  
Salt Lake ◽  
Great Salt Lake ◽  
Halophilic Archaea ◽  
Wide Distribution ◽  
Rrna Gene ◽  
Processing Plant ◽  
Content Type ◽  
Mangrove Tree ◽  
Rare Biosphere

ABSTRACTWe investigated the phylogenetic diversity and community structure of members of the halophilicArchaea(orderHalobacteriales) in five distinct sediment habitats that experience various levels of salinity and salinity fluctuations (sediments from Great Salt Plains and Zodletone Spring in Oklahoma, mangrove tree sediments in Puerto Rico, sediment underneath salt heaps in a salt-processing plant, and sediments from the Great Salt Lake northern arm) usingHalobacteriales-specific 16S rRNA gene primers. Extremely diverseHalobacterialescommunities were encountered in all habitats, with 27 (Zodletone) to 37 (mangrove) different genera identified per sample, out of the currently described 38Halobacterialesgenera. With the exception of Zodletone Spring, where the prevalent geochemical conditions are extremely inhospitable toHalobacterialessurvival, habitats with fluctuating salinity levels were more diverse than permanently saline habitats. Sequences affiliated with the recently described generaHalogranum,Halolamina,Haloplanus,Halosarcina, andHalorientalis, in addition to the generaHalorubrum,Haloferax, andHalobacterium, were among the most abundant and ubiquitous genera, suggesting a wide distribution of these poorly studied genera in saline sediments. TheHalobacterialessediment communities analyzed in this study were more diverse than and completely distinct from communities from typical hypersaline water bodies. Finally, sequences unaffiliated with currently described genera represented a small fraction of the totalHalobacterialescommunities, ranging between 2.5% (Zodletone) to 7.0% (mangrove and Great Salt Lake). However, these novel sequences were characterized by remarkably high levels of alpha and beta diversities, suggesting the presence of an enormous, yet-untapped supply of novelHalobacterialesgenera within the rare biosphere of various saline ecosystems.

scholarly journals Prokaryotic and viral community structure in the singular chaotropic salt lake Salar de Uyuni

2019 ◽  
Vol 21 (6) ◽  
pp. 2029-2042 ◽  
Author(s):  
María Dolores Ramos‐Barbero ◽  
José M. Martínez ◽  
Cristina Almansa ◽  
Nuria Rodríguez ◽  
Judith Villamor ◽  
...  
Keyword(s):  
Community Structure ◽  
Salt Lake ◽  
Viral Community

Study on the Process of Potassium Sulfate Production from Lop Nur Salt Lake Brine Resource

2012 ◽  
Vol 518-523 ◽  
pp. 1831-1836 ◽  
Author(s):  
Hao Li ◽  
Zhen Chen ◽  
Guang Yuan Lei
Keyword(s):  
Potassium Chloride ◽  
Salt Lake ◽  
Water Shortage ◽  
Potassium Sulfate ◽  
Raw Material ◽  
Water Volume ◽  
Sulfate Production ◽  
Low Magnesium ◽  
Lop Nur ◽  
Mixed Salts

Lop Nur salt Lake is the largest potassium brine deposits discovered in China. Its brine is a kind of magnesium sulfate sub-type brine and can be used to produce potassium sulfate fertilizer. In this paper, response to the feature of various potassium salts in brine evaporation and crystallization product and the great variety with evaporation temperature, the potassium sulfate production process was studied in detail. The mixed salts were pre-conversed and post-floated to form schoenite with the desirable potassium grade. In view of the natural conditions of severe water shortage in Lop Nur, carnallite from post-stage of brine evaporation was decomposed creatively by low-magnesium saturated brine to produce coarse potassium chloride. Eventually, conversion experiment was carried out to produce potassium sulfate by adding water into schoenite and coarse potassium chloride. Raw material ratio, water volume, conversion time, conversion temperature, stirring intensity and other conditions was tested and determined. Optimized product of superior quality for agricultural use, with 57.54% conversion rate and 43.27% potassium sulfate, was achieved.

An Integrated Study to Analyze Salt Lake Microbial Community Structure (Novosibirsk Oblast, Russia)

2014 ◽  
Vol 88 (s1) ◽  
pp. 61-62 ◽  
Author(s):  
Alla BRYANSKAYA ◽  
Alexey ROZANOV ◽  
Tatyana MALUP ◽  
Taisiya ALESHINA ◽  
Elena LAZAREVA ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Community Structure ◽  
Salt Lake ◽  
Novosibirsk Oblast ◽  
Integrated Study

Virgibacillus albus sp. nov., a novel moderately halophilic bacterium isolated from Lop Nur salt lake in Xinjiang province, China

2012 ◽  
Vol 102 (4) ◽  
pp. 553-560 ◽  
Author(s):  
Yun-Jiao Zhang ◽  
Yu Zhou ◽  
Man Ja ◽  
Rong Shi ◽  
Wei-Xun Chun-Yu ◽  
...  
Keyword(s):  
Salt Lake ◽  
Halophilic Bacterium ◽  
Moderately Halophilic ◽  
Moderately Halophilic Bacterium ◽  
Lop Nur

scholarly journals Marine Coastline Polygonal Ridges and Surface Roughness Development on a Salt-Crusted Playa: Recognition by Structure-from-Motion Photogrammetry

2019 ◽  
Vol 7 (3) ◽  
pp. 76
Author(s):  
Yuyang Geng ◽  
Yun Shao ◽  
Huaze Gong ◽  
Brian Brisco ◽  
Yang Zhi ◽  
...  
Keyword(s):  
Digital Elevation Model ◽  
Structure From Motion ◽  
Salt Lake ◽  
Dust Emission ◽  
Field Work ◽  
Surface Evolution ◽  
Digital Elevation ◽  
Lop Nur ◽  
Salt Crust ◽  
Elevation Model

Salt crust is a normal landform in drying-out salt lake basins or marine regression coastlines, but the surface evolution processes over a decadal or even centenary period are not well understood due to poor data records. Microrelief characteristics control erodibility and erosivity, which will significantly influence wind erosion and dust emission. It is essential to classify the microrelief pattern of salt crust for mapping its spatial distribution and evaluating the environmental process. A desiccated inland tail-end lake would be an example of the coastline surface evolution after regression and represent a good case study of salt crust because of the fewer exogenic process interruptions. For this paper, field work was performed in the Lop Nur playa in China, about 90° E, 40° N, which used to be a salt lake half a century ago. Ground-based photos of the salt crust were acquired and imported into structure-from-motion (SfM) software to produce a fine centimeter-scale digital elevation model (DEM). Two indexes were introduced and extracted from the digital elevation model to classify various types of salt crust: roughness was calculated to evaluate the magnitude and the gray-level co-occurrence matrix (GLCM) score was derived to describe the structure pattern of the salt crust. Moreover, in this paper, sedimentary features during different parts of a playa evaporation cycle are reviewed and peculiar kinds of salt crust found on Lop Nur are further discussed.

scholarly journals Microbial community structure and diversity within hypersaline Keke Salt Lake environments

2017 ◽  
Vol 63 (11) ◽  
pp. 895-908 ◽  
Author(s):  
Rui Han ◽  
Xin Zhang ◽  
Jing Liu ◽  
Qifu Long ◽  
Laisheng Chen ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Community Structure ◽  
High Throughput Sequencing ◽  
Salt Lake ◽  
16S Rrna Genes ◽  
Rrna Genes ◽  
Tibet Plateau ◽  
Hypersaline Lake ◽  
Hypersaline Lakes

Keke Salt Lake is located in the Qaidamu Basin of China. It is a unique magnesium sulfate-subtype hypersaline lake that exhibits a halite domain ecosystem, yet its microbial diversity has remained unstudied. Here, the microbial community structure and diversity was investigated via high-throughput sequencing of the V3–V5 regions of 16S rRNA genes. A high diversity of operational taxonomic units was detected for Bacteria and Archaea (734 and 747, respectively), comprising 21 phyla, 43 classes, and 201 genera of Bacteria and 4 phyla, 4 classes, and 39 genera of Archaea. Salt-saturated samples were dominated by the bacterial genera Bacillus (51.52%–58.35% relative abundance), Lactococcus (9.52%–10.51%), and Oceanobacillus (8.82%–9.88%) within the Firmicutes phylum (74.81%–80.99%), contrasting with other hypersaline lakes. The dominant Archaea belonged to the Halobacteriaceae family, and in particular, the genera (with an abundance of >10% of communities) Halonotius, Halorubellus, Halapricum, Halorubrum, and Natronomonas. Additionally, we report the presence of Nanohaloarchaeota and Woesearchaeota in Qinghai–Tibet Plateau lakes, which has not been previously documented. Total salinity (especially Mg2+, Cl–, Na+, and K+) mostly correlated with taxonomic distribution across samples. These results expand our understanding of microbial resource utilization within hypersaline lakes and the potential adaptations of dominant microorganisms that allow them to inhabit such environments.

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