您好，欢迎访问中国农业科学院 机构知识库！

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Anthropogenic and climate impacts on carbon stocks of grassland ecosystems in Inner Mongolia and adjacent region

文献类型： 外文期刊

作者： Xin, Xiaoping 1 ; Lan, Xueqi 1 ; Li, Linghao 2 ; Tang, HuaJun 1 ; Guo, Haonan 3 ; Li, Hui 3 ; Jiang, Cuixia 3 ; Liu, Feng 3 ; Shao, Changliang 1 ; Qin, Yifei 1 ; Liu, Zhonglin 4 ; Qing, Gele 1 ; Yan, Ruirui 1 ; Hou, Lulu 1 ; Qi, Jiaguo 5 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Key Lab Efficient Utilizat Arid & Semiarid Arable, Natl Hulunber Grassland Ecosyst Observat & Res Stn, Beijing 100081, Peoples R China

2.Chinese Acad Sci, Inst Bot, Beijing 100093, Peoples R China

3.Lanzhou Univ, Coll Ecol, Lanzhou 730000, Peoples R China

4.Inner Mongolia Univ, Dept Environm Sci, Hohhot 010021, Peoples R China

5.Michigan State Univ, Ctr Global Change & Earth Observat, E Lansing, MI 48823 USA

关键词： Anthropogenic impacts; Climate change; Grassland ecosystems; Inner mongolia and adjacent regions; Carbon dynamics

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：8.2； 五年影响因子：8.6 ）

ISSN： 0048-9697

年卷期： 2024 年 946 卷

页码：

收录情况： SCI

摘要： Up to date, most studies reported that degradation is worsened in the grassland ecosystems of Inner Mongolia and adjacent regions as a result of intensified grazing. This seems to be scientific when considering the total forage or total above-ground biomass as a degradation indicator, but it does not hold true in terms of soil organic carbon density (SOCD). In this study, we quantified the changes of grassland ecosystem carbon stock in Inner Mongolia and adjacent regions from the 1980s to 2000s and identified the major drivers influencing these variations, using the National Grassland Resource Inventory and Soil Survey Dataset in 1980s and the Inventory data during 2002 to 2009 covering 624 sampling plots concerned vegetal traits and edaphic properties across the study region. The result indicated that the above-, below-ground and total vegetation biomass declined from the 1980s to 2000s by similar to 10 %. However, total forage production increased by 6.72 % when considering livestock intake. SOCD remained stable despite a 67 % increase in grazing intensity. A generalized linear model (GLIM) analysis suggested that an increase in grazing intensity from the 1980s to 2000s could only explain 1.04 % of the total biomass change, while changes in precipitation and temperature explained 17.7 % (p < 0.05) of total vegetation biomass (TVB) change. Meanwhile, SOCD change during 1980s - 2000s could be explained 10.08 % by the soil texture (p < 0.05) and <1.6 % by changes in climate and livestock. This implies that the impacts of climate change on grassland biomass are more significant than those of grazing utilization, and SOCD was resistant to both climate change and intensified grazing. Overall, intensified grazing did not result in significant negative impacts on the grassland carbon stocks in the study region during the 1980s and 2000s. The grassland ecosystems possess a mechanism to adjust their root-shoot ratio, enabling them to maintain resilience against grazing utilization.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：中国农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台