The effect of simulated warming on root dynamics and soil microbial community in an alpine meadow of the Qinghai-Tibet Plateau

2017 ◽  
Vol 116 ◽  
pp. 30-41 ◽  
Author(s):  
Changting Wang ◽  
Xinquan Zhao ◽  
Hongbiao Zi ◽  
Lei Hu ◽  
Luji Ade ◽  
...  
Keyword(s):  
Microbial Community ◽  
Soil Microbial Community ◽  
Alpine Meadow ◽  
Tibet Plateau ◽  
Root Dynamics ◽  
Soil Microbial ◽  
Qinghai Tibet Plateau

Effects of Ant Mounds on the Plant and Soil Microbial Community in an Alpine Meadow of Qinghai-Tibet Plateau

2017 ◽  
Vol 28 (5) ◽  
pp. 1538-1548 ◽  
Author(s):  
Changting Wang ◽  
Genxu Wang ◽  
Pengfei Wu ◽  
Rashid Rafique ◽  
Hongbiao Zi ◽  
...  
Keyword(s):  
Microbial Community ◽  
Soil Microbial Community ◽  
Alpine Meadow ◽  
Tibet Plateau ◽  
Soil Microbial ◽  
Qinghai Tibet Plateau ◽  
Ant Mounds

scholarly journals Response of soil microbial communities to alpine meadow degradation severity levels in the Qinghai-Tibet Plateau

2018 ◽  
Author(s):  
wenjuan zhang ◽  
xian xue ◽  
fei peng ◽  
quangang you ◽  
jing pan ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Community Structure ◽  
Alpine Meadow ◽  
Tibet Plateau ◽  
Soil Microbial Community Structure ◽  
Soil Microbial ◽  
Qinghai Tibet Plateau ◽  
Alpine Meadow Degradation ◽  
Meadow Degradation

Soil microbial community structure is an effective indicator to reflect changes in soil quality. Little is known about the effect of alpine meadow degradation on the soil bacterial and fungal community. In this study, we used the Illumina MiSeq sequencing method to analyze the microbial community structure of alpine meadow soil in five different degradation levels (i.e., non-degraded (ND), slightly degraded (LD), moderately degraded (MD), severely degraded (SD), and very severely degraded (VD)) in the Qinghai-Tibet Plateau. Proteobacteria, Actinobacteria, and Acidobacteria were the mainly bacterial phyla in meadow soil across all five degradation levels investigated. Basidiomycota was the mainly fungal phylum in ND; however, we found a shift from Basidiomycota to Ascomycota with an increase (severity) in degradation level. The overall proportion of Cortinariaceae exhibited high fungal variability, and reads were highest in ND (62.80%). Heatmaps of bacterial genera and fungal families showed a two-cluster sample division on a genus/family level: (1) an ND and LD group and (2) an SD, VD, and MD group. Redundancy analysis (RDA) showed that 79.7%and 71.3% of the variance in bacterial and fungal composition, respectively, could be explained by soil nutrient conditions (soil organic carbon, total nitrogen, and moisture) and plant properties (below-ground biomass). Our results indicate that meadow degradation affects both plant and soil properties and consequently drives changes in soil microbial community structure.

Effects of N addition on the plant and soil microbial community in alpine Kobresia tibetica meadow of Qinghai-Tibet Plateau

2017 ◽  
Vol 37 (2) ◽  
Author(s):  
王长庭 WANG Changting ◽  
王根绪 WANG Genxu ◽  
李香真 LI Xiangzhen ◽  
王永 WANG Yong ◽  
字洪标 ZI Hongbiao ◽  
...  
Keyword(s):  
Microbial Community ◽  
Soil Microbial Community ◽  
Tibet Plateau ◽  
N Addition ◽  
Soil Microbial ◽  
Qinghai Tibet Plateau

scholarly journals Seasonal and interannual dynamics of soil microbial biomass and available nitrogen in an alpine meadow in the eastern part of Qinghai–Tibet Plateau, China

2018 ◽  
Vol 15 (2) ◽  
pp. 567-579 ◽  
Author(s):  
Bo Xu ◽  
Jinniu Wang ◽  
Ning Wu ◽  
Yan Wu ◽  
Fusun Shi
Keyword(s):  
Microbial Biomass ◽  
Alpine Meadow ◽  
Nutrient Supply ◽  
Tibet Plateau ◽  
Available N ◽  
Soil Microbial ◽  
Seasonal And Interannual Dynamics ◽  
Interannual Dynamics ◽  
Qinghai Tibet Plateau ◽  
N Pool

Abstract. Soil microbial activity varies seasonally in frozen alpine soils during cold seasons and plays a crucial role in available N pool accumulation in soil. The intra- and interannual patterns of microbial and nutrient dynamics reflect the influences of changing weather factors, and thus provide important insights into the biogeochemical cycles and ecological functions of ecosystems. We documented the seasonal and interannual dynamics of soil microbial and available N in an alpine meadow in the eastern part of Qinghai–Tibet Plateau, China, between April 2011 and October 2013. Soil was collected in the middle of each month and analyzed for water content, microbial biomass C (MBC) and N (MBN), dissolved organic C and N, and inorganic N. Soil microbial community composition was measured by the dilution-plate method. Fungi and actinomycetes dominated the microbial community during the nongrowing seasons, and the proportion of bacteria increased considerably during the early growing seasons. Trends of consistently increasing MBC and available N pools were observed during the nongrowing seasons. MBC sharply declined during soil thaw and was accompanied by a peak in available N pool. Induced by changes in soil temperatures, significant shifts in the structures and functions of microbial communities were observed during the winter–spring transition and largely contributed to microbial reduction. The divergent seasonal dynamics of different N forms showed a complementary nutrient supply pattern during the growing season. Similarities between the interannual dynamics of microbial biomass and available N pools were observed, and soil temperature and water conditions were the primary environmental factors driving interannual fluctuations. Owing to the changes in climate, seasonal soil microbial activities and nutrient supply patterns are expected to change further, and these changes may have crucial implications for the productivity and biodiversity of alpine ecosystems.

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