Particular microbial clades rather than total microbial diversity best predict the vertical profile variation in soil multifunctionality in desert ecosystems

2020 ◽  
Author(s):  
Honglei Wang ◽  
Lianyan Bu ◽  
Jing Tian ◽  
Yingwei Hu ◽  
Fangqin Song ◽  
...  
Keyword(s):  
Microbial Diversity ◽  
Vertical Profile ◽  
Desert Ecosystems ◽  
Profile Variation

scholarly journals Particular microbial taxa rather than total microbial diversity best predict the vertical profile variation in soil multifunctionality in desert ecosystems

2020 ◽  
Author(s):  
Honglei Wang ◽  
Lianyan Bu ◽  
Fangqin Song ◽  
Jing Tian ◽  
Gehong Wei
Keyword(s):  
Microbial Diversity ◽  
Vertical Profile ◽  
Desert Ecosystems ◽  
Profile Variation

scholarly journals Salinity Is a Key Determinant for Soil Microbial Communities in a Desert Ecosystem

mSystems ◽  
2019 ◽  
Vol 4 (1) ◽  
Author(s):  
Kaoping Zhang ◽  
Yu Shi ◽  
Xiaoqing Cui ◽  
Ping Yue ◽  
Kaihui Li ◽  
...  
Keyword(s):  
Microbial Community ◽  
Microbial Diversity ◽  
Community Assembly ◽  
Salinity Gradient ◽  
Soil Microbial Communities ◽  
Desert Ecosystem ◽  
Desert Ecosystems ◽  
Soil Microbial ◽  
Deterministic Processes ◽  
Community Dissimilarity

ABSTRACT Soil salinization is a growing environmental problem caused by both natural and human activities. Excessive salinity in soil suppresses growth, decreases species diversity, and alters the community composition of plants; however, the effect of salinity on soil microbial communities is poorly understood. Here, we characterize the soil microbial community along a natural salinity gradient in Gurbantunggut Desert, Northwestern China. Microbial diversity linearly decreased with increases in salinity, and community dissimilarity significantly increased with salinity differences. Soil salinity showed a strong effect on microbial community dissimilarity, even after controlling for the effects of spatial distance and other environmental variables. Microbial phylotypes (n = 270) belonging to Halobacteria, Nitriliruptoria, [Rhodothermi], Gammaproteobacteria, and Alphaproteobacteria showed a high-salinity niche preference. Out of nine potential phenotypes predicted by BugBase, oxygen-related phenotypes showed a significant relationship with salinity content. To explore the community assembly processes, we used null models of within-community (nearest-taxon index [NTI]) and between-community (βNTI) phylogenetic composition. NTI showed a significantly negative relationship with salinity, suggesting that the microbial community was less phylogenetically clustered in more-saline soils. βNTI, the between-community analogue of NTI, showed that deterministic processes have overtaken stochastic processes across all sites, suggesting the importance of environmental filtering in microbial community assembly. Taken together, these results suggest the importance of salinity in soil microbial community composition and assembly processes in a desert ecosystem. IMPORTANCE Belowground microorganisms are indispensable components for nutrient cycling in desert ecosystems, and understanding how they respond to increased salinity is essential for managing and ameliorating salinization. Our sequence-based data revealed that microbial diversity decreased with increasing salinity, and certain salt-tolerant phylotypes and phenotypes showed a positive relationship with salinity. Using a null modeling approach to estimate microbial community assembly processes along a salinity gradient, we found that salinity imposed a strong selection pressure on the microbial community, which resulted in a dominance of deterministic processes. Studying microbial diversity and community assembly processes along salinity gradients is essential in understanding the fundamental ecological processes in desert ecosystems affected by salinization.

Microbial diversity in caves

AccessScience ◽  
2015 ◽  
Keyword(s):  
Microbial Diversity

Conception of vadose zone research in the area of Goczałkowice reservoir.

2013 ◽  
Vol 2 (1) ◽  
pp. 22-26
Author(s):  
Joanna Czekaj ◽  
Kamil Trepka
Keyword(s):  
Vadose Zone ◽  
Unsaturated Zone ◽  
Vertical Profile ◽  
Structural Model ◽  
Historical Data ◽  
Integrated System ◽  
Nitrate Transport ◽  
Strategic Research ◽  
Research Site ◽  
Observation Wells

Abstract Goczałkowice reservoir is one of the main source of drinking water for Upper Silesia Region. In reference to Water Frame Directive matter since 2010 the strategic research project: „Integrated system supporting management and protection of dammed reservoir (ZiZoZap)”, which is being conducted on Goczałkowice reservoir, has been pursued. In the framework of this project complex groundwater monitoring is carried on. One aspect is vadose zone research, conducted to obtain information about changes in chemical composition of infiltrating water and mass transport within this zone. Based on historical data and the structural model of direct catchment of Goczałkowice reservoir location of the vadose zone research site was selected. At the end of November 2012 specially designed lysimeter was installed with 10 MacroRhizon samplers at each lithological variation in unsaturated zone. This lysimeter, together with nested observation wells, located in the direct proximity, create the vadose zone research site which main aim is specifying the amount of nitrate transport in the vertical profile.

Infrared heterodyne spectrometer measurements of vertical profile oftropospheric ammonia and ozone

1977 ◽  
Author(s):  
B. PEYTON ◽  
R. LANGE ◽  
M. SAVAGE ◽  
R. SEALS ◽  
F. ALLARIO
Keyword(s):  
Vertical Profile ◽  
Heterodyne Spectrometer

0183 - Wide scale mapping of the Southern Ocean microbial diversity

2018 ◽  
Author(s):  
Swan Li San Sow ◽  
Eric Raes
Keyword(s):  
Southern Ocean ◽  
Microbial Diversity ◽  
Wide Scale
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