干旱区生态环境知识资源中心(Arid): Monitoring grassland degradation and restoration using a novel climate use efficiency (NCUE) index in the Tibetan Plateau, China

Arid

DOI	10.1016/j.ecolind.2021.108208
	Monitoring grassland degradation and restoration using a novel climate use efficiency (NCUE) index in the Tibetan Plateau, China
	An, Ru; Zhang, Ce; Sun, Mengqiu; Wang, Huilin; Shen, Xiaoji; Wang, Benlin; Xing, Fei; Huang, Xianglin; Fan, Mengyao
通讯作者	Zhang, C (corresponding author), Univ Lancaster, Lancaster Environm Ctr, Lancaster, England. ; Zhang, C (corresponding author), UK Ctr Ecol & Hydrol, Lib Ave, Lancaster, England. ; Wang, HL (corresponding author), Nanjing Univ, Dept Geog Informat Sci, Nanjing, Peoples R China.
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2021
卷号	131
英文摘要	Grassland degradation is one of the most pressing challenges in natural environment and anthropogenic society. However, there is yet no effective approach for monitoring the spatio-temporal pattern of large-scale grassland degradation. In particular, the research on grassland changes in the harsh natural environment such as the Qinghai-Tibet Plateau is still in its infancy due to complexity, and it is extremely difficult for humans to reach these remote areas. The annual changes in the grassland biomass might be the results of climate fluctuations or grassland degradation. To test the hypothesis, the impact of inter-annual climate fluctuations needs to be considered when monitoring the grassland degradation based on spatio-temporal change of grassland biomass. In this paper, we propose a Novel Climate Use Efficiency index (NCUE) by considering rainfall, temperature, sunlight time, wind speed, surface temperature, accumulated temperature, time lag effect, light, temperature and water suitability and their coordination climatic factors that mainly affect vegetation growth comprehensively, to monitor grassland change suitable for cold and dry climate characteristics of the Qinghai-Tibet Plateau, and to reduce the effect of inter-annual variability of grassland productivity caused by climate fluctuation. As a consequence, grassland degradation monitoring could be more accurate and objective than existing ecological indicators. Our experiments show that the slope of NCUE over 31 years from 1982 to 2012 is 0.0028, showing a recovery trend in grassland. Degradation and restoration of grassland exist at the same time, and their proportions are 20.49% and 23.89%, respectively. By comparing with in-situ measurements in 2013 and 2009, 68% consistency was achieved with our prediction, and the 70% consistency is achieved by comparing with the positive and negative change trend of accumulated NDVI during the growing season. Moreover, the comparative analysis of land use/cover changes (LUCC) from 1990 to 2010 shows 69% of consistency. The ratio of the area of grassland significantly degradation and recovered predicted by NCUE change trend is 1.41% and 1.43%, respectively. It occupies a very small area of the study area. Yet, that predicted by NDVI change trend is 42.17% and 31.90%, respectively, and about 70% of the area is detected as drastic changes. It shows that NDVI is sensitive to climate fluctuations, while NCUE reduces the impact of climate fluctuations, reflecting change of grassland being affected by human activities and long-term climate change. The novel NCUE has great potential and utility to minify the impact of climate fluctuation and reflect grassland changes over space and time quantitatively. Such ecological index provides a new understanding of spatial and temporal patterns of grassland degradation in the Three River Headwaters Region (TRHR) at the same time.
英文关键词	Grassland degradation and restoration RUE NCUE IMF TRHR Tibetan Plateau
类型	Article
语种	英语
开放获取类型	gold, Green Accepted
收录类别	SCI-E
WOS记录号	WOS:000704554400004
WOS关键词	3-RIVER HEADWATERS REGION ; LAND DEGRADATION ; RANGELAND DEGRADATION ; VEGETATION CHANGES ; TREND ANALYSIS ; TIME-SERIES ; RAINFALL ; GROWTH ; DESERTIFICATION
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
来源机构	南京大学 ; 河海大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363009
作者单位	[An, Ru; Sun, Mengqiu; Shen, Xiaoji; Wang, Benlin; Xing, Fei; Huang, Xianglin; Fan, Mengyao] Hohai Univ, Sch Hydrol & Water Resources, Nanjing, Peoples R China; [Zhang, Ce] Univ Lancaster, Lancaster Environm Ctr, Lancaster, England; [Zhang, Ce] UK Ctr Ecol & Hydrol, Lib Ave, Lancaster, England; [Wang, Huilin] Nanjing Univ, Dept Geog Informat Sci, Nanjing, Peoples R China; [Shen, Xiaoji] Monash Univ, Dept Civil Engn, Melbourne, Vic, Australia
推荐引用方式 GB/T 7714	An, Ru,Zhang, Ce,Sun, Mengqiu,et al. Monitoring grassland degradation and restoration using a novel climate use efficiency (NCUE) index in the Tibetan Plateau, China[J]. 南京大学, 河海大学,2021,131.
APA	An, Ru.,Zhang, Ce.,Sun, Mengqiu.,Wang, Huilin.,Shen, Xiaoji.,...&Fan, Mengyao.(2021).Monitoring grassland degradation and restoration using a novel climate use efficiency (NCUE) index in the Tibetan Plateau, China.ECOLOGICAL INDICATORS,131.
MLA	An, Ru,et al."Monitoring grassland degradation and restoration using a novel climate use efficiency (NCUE) index in the Tibetan Plateau, China".ECOLOGICAL INDICATORS 131(2021).