气候变化领域集成服务门户(CCPortal): A Method for Quantifying the Impacts of Human Activities on Net Primary Production of Grasslands in Northwest China

CCPortal

DOI	10.3390/rs13132479
	A Method for Quantifying the Impacts of Human Activities on Net Primary Production of Grasslands in Northwest China
	Li, Chuanhua; Dou, Tianbao; Wang, Yutao; Zhu, Tongbin; Yin, Huanhuan; Zhou, Min; Liu, Lihui; Wu, Xiaodong
通讯作者	Wu, XD (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Cryosphere Res Stn Qinghai Tibet Plateau, Lanzhou 730000, Peoples R China.
发表日期	2021
EISSN	2072-4292
卷号	13 期号:13
英文摘要	Accurately assessing the impact of human activities on net primary productivity (NPP) of vegetation is of great significance to the achievement of sustainable development. However, it is difficult to disentangle the effects of climate conditions and human activities on NPP, and bridging this knowledge gap largely depends on the calculation of the NPP under natural conditions. Here, we propose a method for calculating natural vegetation NPP (NNPP) based on non-human influence grids, which are obtained according to the consistent rate of climate and actual NPP (ANPP) temporal changes. We selected Northwest China as study area, and we used a light use efficiency (LUE) model to estimate ANPP and used the random forest algorithm (RF) to estimate the NNPP. The results show that NNPP is very close to ANPP, and the human activities on NPP (HNPP) based on NNPP is close to the actual situation of human activities on NPP. From 2001 to 2017, the positive HNPP accounts for 40.28% of the total grassland area, with an average value of 28.65 gC center dot m(-2)center dot yr(-1), while the negative HNPP accounts for 59.72% of the total area, with an average value of -31.19 gC center dot m(-2)center dot yr(-1). The grassland NPP shows an increasing trend, which is dominated by climate factors. Human activity is the dominant factor for the grassland degradation, accounting for 42.78% of the degraded area, but promoting grassland growth in 11.4% of the restored area. This study provides a new method to estimate the impacts of human activities on vegetation, and the results can be used to evaluate the effectiveness of ecological environmental governance, providing a quantitative basis for scientifically building the harmonious relationship between human and nature.
关键词	QUANTITATIVE ASSESSMENT CLIMATE-CHANGE CENTRAL-ASIA TERRESTRIAL DEGRADATION MODEL CLASSIFICATION PLATEAU CARBON ROLES
英文关键词	nature net primary productivity; human activities; light use efficiency model; random forest; Northwest China
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:000671255400001
来源期刊	REMOTE SENSING
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253969
作者单位	[Li, Chuanhua; Dou, Tianbao; Wang, Yutao; Zhu, Tongbin; Yin, Huanhuan; Zhou, Min; Liu, Lihui] Northwest Normal Univ, Coll Geog & Environm Sci, Lanzhou 730070, Peoples R China; [Li, Chuanhua; Wu, Xiaodong] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Cryosphere Res Stn Qinghai Tibet Plateau, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Li, Chuanhua,Dou, Tianbao,Wang, Yutao,et al. A Method for Quantifying the Impacts of Human Activities on Net Primary Production of Grasslands in Northwest China[J]. 中国科学院西北生态环境资源研究院,2021,13(13).
APA	Li, Chuanhua.,Dou, Tianbao.,Wang, Yutao.,Zhu, Tongbin.,Yin, Huanhuan.,...&Wu, Xiaodong.(2021).A Method for Quantifying the Impacts of Human Activities on Net Primary Production of Grasslands in Northwest China.REMOTE SENSING,13(13).
MLA	Li, Chuanhua,et al."A Method for Quantifying the Impacts of Human Activities on Net Primary Production of Grasslands in Northwest China".REMOTE SENSING 13.13(2021).