The diversity of denitrifying bacteria in the alpine meadow soil of Sanjiangyuan natural reserve in Tibet Plateau

Alpine meadow and alpine steppe are the two most widely distributed nonzonal vegetation types in the Qinghai-Tibet Plateau. In the context of global climate change, the differences in spatial-temporal variation trends and their responses to climate change are discussed. It is of great significance to reveal the response of the Qinghai-Tibet Plateau to global climate change and the construction of ecological security barriers. This study takes alpine meadow, alpine steppe and the overall vegetation of the Qinghai-Tibet Plateau as the research objects. The normalized difference vegetation index (NDVI) data and meteorological data were used as the data sources between 2000 and 2018. By using the mean value method, threshold method, trend analysis method and correlation analysis method, the spatial and temporal variation trends in the alpine meadow, alpine steppe and the overall vegetation of the Qinghai-Tibet Plateau were compared and analyzed, and their differences in the responses to climate change were discussed. The results showed the following: (1) The growing season length of alpine meadow was 145~289 d, while that of alpine steppe and the overall vegetation of the Qinghai-Tibet Plateau was 161~273 d, and their growing season lengths were significantly shorter than that of alpine meadow. (2) The annual variation trends of the growing season NDVI for the alpine meadow, alpine steppe and the overall vegetation of the Qinghai-Tibet Plateau increased obviously, but their fluctuation range and change rate were significantly different. (3) The overall vegetation improvement in the Qinghai-Tibet Plateau was primarily dominated by alpine steppe and alpine meadow, while the degradation was primarily dominated by alpine meadow. (4) The responses between the growing season NDVI and climatic factors in the alpine meadow, alpine steppe and the overall vegetation of the Qinghai-Tibet Plateau had great spatial heterogeneity in the Qinghai-Tibet Plateau. These findings provide evidence towards understanding the characteristics of the different vegetation types in the Qinghai-Tibet Plateau and their spatial differences in response to climate change.

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Influence of thawed soil depth on rainfall erosion of frozen bare meadow soil in the Qinghai‐Tibet Plateau

Earth Surface Processes and Landforms ◽

10.1002/esp.5138 ◽

2021 ◽

Author(s):

Xiaofeng Gao ◽

Xiaonan Shi ◽

Tingwu Lei

Keyword(s):

Soil Depth ◽

Tibet Plateau ◽

Meadow Soil ◽

Qinghai Tibet Plateau ◽

Rainfall Erosion

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Effects of short-term and long-term warming on soil nutrients, microbial biomass and enzyme activities in an alpine meadow on the Qinghai-Tibet Plateau of China

Soil Biology and Biochemistry ◽

10.1016/j.soilbio.2014.05.014 ◽

2014 ◽

Vol 76 ◽

pp. 140-142 ◽

Cited By ~ 52

Author(s):

Xuexia Wang ◽

Shikui Dong ◽

Qingzhu Gao ◽

Huakun Zhou ◽

Shiliang Liu ◽

...

Keyword(s):

Microbial Biomass ◽

Soil Nutrients ◽

Enzyme Activities ◽

Alpine Meadow ◽

Tibet Plateau ◽

Short Term ◽

Qinghai Tibet Plateau

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Artificial Measures Are Not Necessarily Better Than Natural Recovery for the Extremely Degraded Alpine Meadow: The Results of Simulated Degradation Restoration After Three Years

Journal of Biobased Materials and Bioenergy ◽

10.1166/jbmb.2021.2041 ◽

2021 ◽

Vol 15 (2) ◽

pp. 224-230

Author(s):

Liuyan Tang ◽

Lin Chen ◽

Zhen’an Yang

Keyword(s):

Microbial Biomass ◽

Alpine Meadow ◽

Total Carbon ◽

Tibet Plateau ◽

Microbial Biomass Nitrogen ◽

Natural Recovery ◽

Advantages And Disadvantages ◽

Natural Treatment ◽

Artificial Restoration ◽

Better Than

Natural and artificial restoration measures are widely used to restore degraded ecosystems, such as degraded alpine meadow. The objective of this research was to evaluate the advantages and disadvantages of natural and artificial measures for extremely degraded alpine meadows. We removed the surface soil (0–10 cm) of the alpine meadow to simulate the extremely degraded “black soil beach,” and set artificial measures (planting Festuca sinensis (E) and Elymus sibircus L. cv. chuan-cao No. 1 (F)) and natural recovery (N) (without any artificial auxiliary measures) in the northeastern part of the Qinghai-Tibet Plateau (QTP), China. After 3 years, we determined the characteristics of community and soil in the artificial and natural treatment. The results show that the species number, above-and below-ground biomass (AB, BB), root-shoot ratio (R/S) in N is significantly higher than that in artificial restoration (E and F); while the community coverage and concentration of soil total carbon, total nitrogen, microbial biomass carbon, microbial biomass nitrogen and microbial biomass phosphorus (TC, TN, MBC, MBN and MBP) in artificial restoration is significantly higher than that in N. In conclusion, compared with N, artificial measures (E and F) are not completely beneficial to the development of plant community diversity and the restoration of soil nutrients in the extremely degraded meadow. Thus, the establishment of artificial grassland is not necessarily better than natural recovery for the extremely degraded alpine meadow.

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