环境科学
草原
草原
生态系统
干旱
生物量(生态学)
植被(病理学)
草地生态系统
陆地生态系统
水文学(农业)
生态学
土壤科学
地质学
生物
病理
医学
岩土工程
作者
Yinyin Wang,Lei Deng,Gao‐Lin Wu,Kaibo Wang,Zhouping Shangguan
出处
期刊:Catena
[Elsevier]
日期:2018-05-01
卷期号:164: 23-31
被引量:12
标识
DOI:10.1016/j.catena.2018.01.007
摘要
Grassland ecosystems play an important role in the carbon (C) balance of arid and semi–arid regions. These ecosystems provide C for grass growth and soil microbial activities and represent one of the main sources of atmospheric C. In this study, we estimated the C density and storage of 223 sampling sites in grassland ecosystems on the Loess Plateau using elevation, vegetation indexes, precipitation, air temperature, day and night land surface temperature (LSTd and LSTn, respectively), evapotranspiration (ET), percent tree cover and the non–vegetated area to build decision regression tree and generalized linear regression models (GLMs). The results showed that the C density decreased from south to north and ranged from 0.22 to 29.29 kg C/m2. The average amount of C stored in the ecosystems was 1.46 Pg. The typical steppe and forest steppe stored the most C, and the steppe desert stored the least. The soil (0–1 m) stored most of the organic C, accounting for > 90%, and the belowground biomass (BGB) contained > 3 times the amount of C as the aboveground biomass (AGB). This study provides reference information for the loss of C and associated mitigation strategies on the Loess Plateau.
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