Temporal and Spatial Dynamics of Carbon Storage in Qinghai Grasslands

Agronomy

Buqing Yao¹  Xiaotao Huang¹  Chunbo Chen²  Xiang Liu³ 

[1] Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China;State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China;State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, China;

关键词: carbon sequestration;    grasslands;    vegetation;    soil organic carbon density;    carbon cycle;    climate change;   

DOI  :  10.3390/agronomy12051201

来源: DOAJ

【 摘 要 】

Accurate quantification of ecosystem carbon storage dynamics is very important in regional ecological management. However, the dynamics of grassland carbon storage in Qinghai, China, are still unexplored. We investigated the temporal and spatial dynamics of carbon storage in the Qinghai grasslands from 1979 to 2018, using the spatially explicit Biome-BGCMuSo model. The average annual value of vegetation carbon density (VCD) was 52.71 gC·m⁻². After 2000, VCD showed an overall increasing trend, with an average rate of 2.14 gC·m⁻². The VCD was relatively high in the eastern and southeastern regions of Qinghai compared with that in the western and central areas. The increasing trend in VCD was mainly observed in the eastern and southeastern regions, while a decreasing trend was evident in western and central Qinghai. Annual soil organic carbon density (SOCD) in Qinghai grasslands generally increased from 1979 to 2018. After 2001, the SOCD increased by an average rate of 7.07 gC·m⁻². The SOCD was relatively high in eastern and southeastern Qinghai compared with that in western and central Qinghai. The pronounced increasing trend of SOCD was mainly distributed in the southeast and northeast parts of Qinghai, while the decreasing trend was mainly distributed in the area between southeast and northeast Qinghai, and in the central and western regions. This study deepened our understanding of carbon dynamics in the Qinghai grasslands and provided data for guiding the ecological restoration and carbon management of local grasslands.

【 授权许可】

Unknown