干旱区生态环境知识资源中心(Arid): Assessing the Effects of Human Activities on Terrestrial Net Primary Productivity of Grasslands in Typical Ecologically Fragile Areas

Arid

DOI	10.3390/biology12010038
	Assessing the Effects of Human Activities on Terrestrial Net Primary Productivity of Grasslands in Typical Ecologically Fragile Areas
	Huang, Qing; Zhang, Fangyi; Zhang, Qian; Jin, Yunxiang; Lu, Xuehe; Li, Xiaoqing; Liu, Jia
通讯作者	Zhang, FY
来源期刊	BIOLOGY-BASEL
EISSN	2079-7737
出版年	2023
卷号	12 期号:1
英文摘要	Simple Summary Human activities have been found to be the major factor driving the changes in terrestrial ecosystems. However, large uncertainties remain in assessing the impact of human activities on terrestrial ecosystems. In consequence, we established a quantitative indicator based on terrestrial potential and actual net primary productivity (NPP), as well as the forage harvest NPP, to better reveal the spatiotemporal changes of grassland ecosystems in response to human activities in eastern Inner Mongolia, and to further explore the relationship between human activities and grassland degradation in typical ecologically fragile areas. The quantitative indicator showed that NPP loss induced by human activities is weakening in the study area, and a positive relationship between human activities and grassland degradation was found. The results of this study will provide a deeper and more comprehensive understanding of the grassland degradation influenced by human activities, and a method reference for similar research. Global enhanced human activities have deeply influenced grassland ecosystems. Quantifying the impact of human activities on grasslands is crucial to understanding the grassland dynamic change mechanism, such as grassland degradation, and to establishing ecosystem protection measures. In this study, potential net primary productivity (PNPP), actual NPP (ANPP), and the forage harvest NPP (HNPP) were employed to establish the human activities index (HAI) to reveal the spatiotemporal changes of the effects of human activities on grassland ecosystems in eastern Inner Mongolia from 2000 to 2017, and to further explore the relationship between human activities and grassland degradation. The results showed that the total average PNPP, ANPP, and HNPP of grasslands in eastern Inner Mongolia were 187.2 Tg C yr(-1), 152.3 Tg C yr(-1), and 8.9 Tg C yr(-1), respectively, during the period of 2000 to 2017. The HAI exhibited a clear decreasing trend during the study period, with annual mean values ranging from 0.75 to 0.47, which indicates that the NPP loss induced by human activities is weakening, and this trend is dominated by the difference between potential NPP and actual NPP. About 42.4% of the study area was non-degraded grassland, and the declining grassland degradation index (GDI) indicated that the degradation grade in eastern Inner Mongolia improved from moderate to light degradation. A positive relationship was found between HAI and GDI. This relationship was more significant in Xilingol League, which is a typical ecologically fragile area, than that in Xing'an League and Hulunbuir City.
英文关键词	human activities net primary productivity grassland degradation climate change forage harvest
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000914134000001
WOS关键词	LAND-COVER CHANGE ; QUANTITATIVE ASSESSMENT ; HUMAN APPROPRIATION ; CLIMATE-CHANGE ; RELATIVE ROLES ; CHINA ; MODEL ; DESERTIFICATION ; DEGRADATION ; DYNAMICS
WOS类目	Biology
WOS研究方向	Life Sciences & Biomedicine - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395558
推荐引用方式 GB/T 7714	Huang, Qing,Zhang, Fangyi,Zhang, Qian,et al. Assessing the Effects of Human Activities on Terrestrial Net Primary Productivity of Grasslands in Typical Ecologically Fragile Areas[J],2023,12(1).
APA	Huang, Qing.,Zhang, Fangyi.,Zhang, Qian.,Jin, Yunxiang.,Lu, Xuehe.,...&Liu, Jia.(2023).Assessing the Effects of Human Activities on Terrestrial Net Primary Productivity of Grasslands in Typical Ecologically Fragile Areas.BIOLOGY-BASEL,12(1).
MLA	Huang, Qing,et al."Assessing the Effects of Human Activities on Terrestrial Net Primary Productivity of Grasslands in Typical Ecologically Fragile Areas".BIOLOGY-BASEL 12.1(2023).