草原
放牧
草原
表土
土壤碳
农学
环境科学
植物多样性
物种丰富度
生态学
生态系统
物种多样性
多样性指数
植物群落
土壤水分
生物多样性
土壤科学
生物
作者
Tengfei Li,Shenghua Chang,Zhaofeng Wang,Yunxiang Cheng,Zechen Peng,Lan Li,Shanning Lou,Yongjie Liu,Deli Wang,Zhong Hua-ping,Huazhong Zhu,Fujiang Hou,Zhibiao Nan
标识
DOI:10.1016/j.scitotenv.2024.171171
摘要
The relationship between plant diversity and the ecosystem carbon pool is important for understanding the role of biodiversity in regulating ecosystem functions. However, it is not clear how the relationship between plant diversity and soil carbon content changes under different grassland use patterns. In a 3-year study from 2013 to 2015, we investigated plant diversity and soil total carbon (TC) content of grasslands in northern China under different grassland utilization methods (grazing, mowing, and enclosure) and climatic conditions. Shannon-Wiener and Species richness index of grassland were significantly decreased by grazing and mowing. Plant diversity was positively correlated with annual precipitation (AP) and negatively correlated with annual mean temperature (AMT). AP was the primary regulator of plant diversity. Grazing and mowing decreased TC levels in grasslands compared with enclosures, especially in topsoil (0-20 cm). The average TC content was decreased by 58 % and 36 % in the 0-10 cm soil layer, while it was decreased by 68 % and 39 % in 10-20 cm soil layer. TC was positively correlated with AP and negatively correlated with AMT. Principal component analysis (PCA) showed that plant diversity was positively correlated with soil TC, and the correlation decreased with an increase in the soil depth. Overall, this study provides a theoretical basis for predicting soil carbon storage in grasslands under human disturbances and climate change impacts.
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