Quantifying and Mapping Human Appropriation of Net Primary Productivity in Qinghai Grasslands in China

	Quantifying and Mapping Human Appropriation of Net Primary Productivity in Qinghai Grasslands in China
	Huang, XT; Yang, YS; Chen, CB; Zhao, HF; Yao, BQ; Ma, Z; Ma, L; Zhou, HK
刊名	AGRICULTURE-BASEL
	2022
卷号	12 期号:4
英文摘要	Human appropriation of net primary productivity (HANPP) is an important indicator for assessing ecological sustainability. However, the spatiotemporal dynamics of HANPP in the Qinghai grasslands remain unclear. In this study, we used the spatially explicit Biome-BGCMuSo model to quantify and map HANPP in the Qinghai grasslands from 1979 to 2018. Generally, the actual net primary productivity (NPPact) was slightly lower than the potential net primary productivity (NPPpot), and the difference between the NPPpot and NPPact increased slightly over time. From 1979 to 2001, the NPPpot and NPPact were relatively stable; however, from 2001 to 2018, both showed significant fluctuating upward trends. From 1979 to 2018, HANPP showed a fluctuating upward trend from 6.36 to 31.85 gC/m(2)/yr, with an average increase of 2.14 gC/m(2)/yr. The average HANPP was 16.90 gC/m(2)/yr, which represented 18.80% of the NPP(pot )of Qinghai grasslands. High HANPP mainly occurred in eastern Qinghai, whereas it was low in central and western Qinghai. Conversely, from 1979 to 2018, the HANPP efficiency decreased in a fluctuating way from 98.28% to 72.05%, with an average annual decrease of 0.66%. The interannual variations in the HANPP efficiency and harvest were negatively correlated, with a correlation coefficient of -0.46 (p < 0.01). The average HANPP efficiency was 85.33%, and the values in most grids were between 80% and 100%, being relatively low in southern and eastern Qinghai. In rare cases, the HANPP efficiency was greater than 1. This study clarifies the details of spatiotemporal dynamics of HANPP in the Qinghai grasslands and indicates the need to optimize local management of grassland resources to ensure future ecological sustainability.
内容类型	期刊论文
源URL	[http://210.75.249.4/handle/363003/61251]
专题	西北高原生物研究所_中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Huang, XT,Yang, YS,Chen, CB,et al. Quantifying and Mapping Human Appropriation of Net Primary Productivity in Qinghai Grasslands in China[J]. AGRICULTURE-BASEL,2022,12(4).
APA	Huang, XT.,Yang, YS.,Chen, CB.,Zhao, HF.,Yao, BQ.,...&Zhou, HK.(2022).Quantifying and Mapping Human Appropriation of Net Primary Productivity in Qinghai Grasslands in China.AGRICULTURE-BASEL,12(4).
MLA	Huang, XT,et al."Quantifying and Mapping Human Appropriation of Net Primary Productivity in Qinghai Grasslands in China".AGRICULTURE-BASEL 12.4(2022).