Journal ArticleDOI
Ecosystem carbon stocks and their changes in China’s grasslands
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TLDR
Spatial patterns and temporal dynamics of grassland biomass were closely correlated with precipitation, while changes in soil C stocks exhibited close associations with soil moisture and soil texture, indicating that grassland ecosystems are C neutral.Abstract:
The knowledge of carbon (C) stock and its dynamics is crucial for understanding the role of grassland ecosystems in China’s terrestrial C cycle. To date, a comprehensive assessment on C balance in China’s grasslands is still lacking. By reviewing pub-lished literature, this study aims to evaluate ecosystem C stocks (both vegetation biomass and soil organic C) and their changes in China’s grasslands. Our results are summarized as follows: (1) biomass C density (C stock per area) of China’s grasslands differed greatly among previous studies, ranging from 215.8 to 348.1 g C m −2 with an average of 300.2 g C m −2 . Likewise, soil C density also varied greatly between 8.5 and 15.1 kg C m −2 . In total, ecosystem C stock in China’s grasslands was estimated at 29.1 Pg C. (2) Both the magnitude and direction of ecosystem C changes in China’s grasslands differed greatly among previous studies. According to recent reports, neither biomass nor soil C stock in China’s grasslands showed a significant change during the past 20 years, indicating that grassland ecosystems are C neutral. (3) Spatial patterns and temporal dynamics of grassland biomass were closely correlated with precipitation, while changes in soil C stocks exhibited close associations with soil moisture and soil texture. Human activities, such as livestock grazing and fencing could also affect ecosystem C dynamics in China’s grasslands.read more
Citations
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Proceedings ArticleDOI
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Journal ArticleDOI
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Journal ArticleDOI
Investigation of the Roadside Forest Based on "Carbon Neutral"
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Journal ArticleDOI
Biomass, Carbon and Nitrogen Partitioning and Water Use Efficiency Differences of Five Types of Alpine Grasslands in the Northern Tibetan Plateau
TL;DR: In this paper , the plant biomass and C, N concentrations, stocks and vegetation WUE of five kinds of alpine grassland types were investigated in northern Tibetan Plateau, and the results showed that there were significant differences among five types of alpin grasslands in aboveground biomass (AGB), below ground biomass (BGB), total biomass (TB), root:shoot (R/S) ratio while the highest value of different indices was shown in alpine meadow type (AM).
References
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Journal ArticleDOI
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Journal ArticleDOI
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Journal ArticleDOI
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Journal ArticleDOI
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TL;DR: In this article, the authors investigated the possible impact of recent climate changes on growing season duration in the temperate vegetation of China, using the advanced very high resolution radiometer (AVHRR)/normalized difference vegetation index (NDVI) biweekly time-series data collected from January 1982 to December 1999 and concurrent mean temperature and precipitation data.
Journal ArticleDOI
Primary production and rain use efficiency across a precipitation gradient on the Mongolia Plateau.
Yongfei Bai,Jianguo Wu,Jianguo Wu,Qi Xing,Qingmin Pan,Jianhui Huang,Dianling Yang,Xingguo Han +7 more
TL;DR: The results clearly indicate that the patterns of both ANPP and RUE are scale dependent, and the seemingly conflicting patterns of RUE in space vs. time suggest distinctive underlying mechanisms, involving interactions among precipitation, soil N, and biotic factors.