Carbon flux phenology and net ecosystem productivity simulated by a bioclimatic index in an alpine steppe-meadow on the Tibetan Plateau

2019 ◽  
Vol 394 ◽  
pp. 66-75 ◽  
Author(s):  
Xi Chai ◽  
Peili Shi ◽  
Minghua Song ◽  
Ning Zong ◽  
Yongtao He ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Carbon Flux ◽  
The Tibetan Plateau ◽  
Net Ecosystem Productivity ◽  
Ecosystem Productivity ◽  
Alpine Steppe ◽  
Bioclimatic Index ◽  
Steppe Meadow

Soil conservation service on the Tibetan Plateau, 1984–2013

2018 ◽  
Vol 109 (3-4) ◽  
pp. 445-451 ◽  
Author(s):  
Jian SUN ◽  
Yu LIU ◽  
Tiancai ZHOU ◽  
Guohua LIU ◽  
Jingsheng WANG
Keyword(s):  
Soil Erosion ◽  
Tibetan Plateau ◽  
Soil Conservation ◽  
Economic Value ◽  
Equation Model ◽  
The Tibetan Plateau ◽  
Alpine Steppe ◽  
Ecological Protection ◽  
State And Local ◽  
Regional Ecological Security

ABSTRACTSoil erosion can pose a serious problem to environmental quality and sustainable development. On the Tibetan Plateau, soil erosion is one of the main challenges to regional ecological security. Our analysis investigates soil erosion and evaluates its economic value in alpine steppe, alpine meadow, alpine desert steppe and forest ecosystems on the Tibetan Plateau. Analysis was carried out from 1984 to 2013. The results show that the annual average potential soil erosion, practical soil erosion and soil conservation calculated by the Revised University Soil Loss Equation model were 2.19×109ta–1, 2.16×109ta–1 and 2.72×107ta–1, respectively. The economic value of retaining soil nutrients, reducing the formation of wasteland and the economic benefit of reducing sediment deposition were 1.98×108RMBa–1, 2.55×1012RMBa–1 and 7.44×104RMBa–1, respectively. From comparing different ecosystems, we found that the forest ecosystem had the greatest soil retention and economic values. We also found that the potential and actual soil erosion values were extremely high on the Tibetan Plateau. The study highlights that state and local policymakers must give greater emphasis to ecological protection in the future.

scholarly journals Evaluating the complementary relationship of evapotranspiration in the alpine steppe of the Tibetan Plateau

2015 ◽  
Vol 51 (2) ◽  
pp. 1069-1083 ◽  
Author(s):  
Ning Ma ◽  
Yinsheng Zhang ◽  
Jozsef Szilagyi ◽  
Yanhong Guo ◽  
Jianqing Zhai ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
The Tibetan Plateau ◽  
Complementary Relationship ◽  
Alpine Steppe ◽  
Relationship Of

scholarly journals Precipitation and aridity index regulating spatial patterns of vegetation production and species diversity based on alpine grassland transect, Tibetan Plateau

2016 ◽  
Author(s):  
Jian Sun
Keyword(s):  
Tibetan Plateau ◽  
Primary Production ◽  
Alpine Meadow ◽  
Net Primary Production ◽  
Aridity Index ◽  
Alpine Grassland ◽  
The Tibetan Plateau ◽  
Aboveground Net Primary Production ◽  
Alpine Steppe ◽  
Unimodal Pattern

Although the relationship between the aboveground net primary production (ANPP) and speciesdiversity (SR) have been widely reported, there is considerable disagreement about the fitting patterns of SR–ANPP, which has been variously described as ‘positive’, ‘negative’, ‘unimodal’, ‘U-shaped’ and so on. Not surprisingly, the effect-factors including precipitation, aridity index and geographic conditions (e.g.,altitude, longitude and latitude) on ANPP and SR continue to interest researchers, especially the effects at high altitude regions. We investigated ANPP and SR from 113 sampled sites (399 plots) across alpine meadow and steppe in the Tibetan Plateau, which included Tibet, Qinghai and Sichuan province. The effects of various environmental factors (precipitation, temperature, aridity index, altitude, longitude,latitude and vegetation type on SR and ANPP) were explored. The results indicate that a unimodal pattern was confirmed between ANPP and SR in alpine steppe (R 2 =0.45, P <0.0001), alpine meadow ( R 2 =0.4, P <0.0001), and all samples across alpine grassland ( R 2 =0.52, P <0.0001). For the aboveground net primary production, the appropriate precipitation and aridity is 600mm and 42, respectively. Under thesame moisture conditions, the maximum value of diversity is 0.75. Longitude ( R 2 =0.69, P <0.0001) and altitude ( R 2 =0.48, P <0.0001) have positive and negative effects on aboveground net primary production, and a similar relationship exists with diversity ( R 2 =0.44, P <0.0001 and R 2 =0.3, P <0.0001).The same patterns of diversity and production responding to precipitation and the aridity index were evident in alpine steppe and meadow, and a unimodal pattern was confirmed between ANPP and SR in both locations.

Water and CO2 fluxes over semiarid alpine steppe and humid alpine meadow ecosystems on the Tibetan Plateau

2016 ◽  
Vol 131 (1-2) ◽  
pp. 547-556 ◽  
Author(s):  
Lei Wang ◽  
Huizhi Liu ◽  
Yaping Shao ◽  
Yang Liu ◽  
Jihua Sun
Keyword(s):  
Tibetan Plateau ◽  
Alpine Meadow ◽  
The Tibetan Plateau ◽  
Co2 Fluxes ◽  
Alpine Steppe

Plant and soil responses of an alpine steppe on the Tibetan Plateau to multi-level nitrogen addition

2013 ◽  
Vol 373 (1-2) ◽  
pp. 515-529 ◽  
Author(s):  
Yongwen Liu ◽  
Xu-Ri ◽  
Xingliang Xu ◽  
Da Wei ◽  
Yinghong Wang ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Nitrogen Addition ◽  
The Tibetan Plateau ◽  
Alpine Steppe ◽  
Multi Level ◽  
Soil Responses
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