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DOI	10.1016/j.agee.2021.107719
	Global trends in vegetation fractional cover: Hotspots for change in bare soil and non-photosynthetic vegetation
	Hill, Michael J.; Guerschman, Juan P.
通讯作者	Hill, MJ (corresponding author), CSIRO Land & Water, Canberra, ACT 2601, Australia.
来源期刊	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
ISSN	0167-8809
EISSN	1873-2305
出版年	2022
卷号	324
英文摘要	Vegetation Fractional Cover (VFC) is an important indicator of the condition of the terrestrial surface of the Earth. The dynamics of bare soil (BS), non-photosynthetic vegetation (NPV) and photosynthetic vegetation (PV) fractions reveal patterns of growth, senescence, dormancy and regeneration. The dynamics also reveal trends in land cover and land use management across the globe. Analysis of satellite data has indicated increasing greenness of the land surface however the dynamics of the NPV and BS fractions are equally important indicators of many elements of ecosystem function and sustainability. In this study, we provide a comprehensive assessment of trends in VFC for the global terrestrial land surface based on a trend analysis over the period 2001-2018 using the Global Vegetation Fractional Cover Product. Trends were analysed by Mann-Kendell regressions over 18 years for each month of the year. Monthly maps of significant trend areas were aggregated to provide seasonal assessments. Areas and percentage areas of positive and negative trends were compiled for United Nations Subregions, Countries and Ecoregions. Significant negative trends in BS occurred across 20 M km2 of the terrestrial land surface. Although the areas of negative trends in BS were largest in China and India, the top 24 countries by area were widely distributed across the world. However, BS increased significantly across more than 11 M km2. Eleven of the top 24 ranked countries for area of increasing BS were in Africa. Substantial areas exhibited negative trends in NPV split between China and India where PV was increasing, and drylands in Asia and Africa where BS was increasing. Analysis of covariate factors at country scale inferred an association between significant increase in BS and long-term drought and increases in livestock populations. The positive trends in BS and negative trends in NPV are indicators of current and future risk for soil erosion, habitat change, and reduction in ecosystem health across heavily populated regions of the developing world.
英文关键词	Vegetation fractional cover Photosynthetic vegetation Non-photosynthetic vegetation Bare soil Spatio-temporal trends Livestock Cropping Drought
类型	Article
语种	英语
收录类别	SCI-E ; SSCI
WOS记录号	WOS:000711629100003
WOS关键词	LAND-USE ; CLIMATE-CHANGE ; IMPACTS ; INDICATORS ; SAVANNA ; EROSION ; RUNOFF ; CHINA ; AREAS ; DESERTIFICATION
WOS类目	Agriculture, Multidisciplinary ; Ecology ; Environmental Sciences
WOS研究方向	Agriculture ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/374535
作者单位	[Hill, Michael J.; Guerschman, Juan P.] CSIRO Land & Water, Canberra, ACT 2601, Australia; [Hill, Michael J.] Univ North Dakota, Dept Earth Syst Sci & Policy, Grand Forks, ND 58202 USA
推荐引用方式 GB/T 7714	Hill, Michael J.,Guerschman, Juan P.. Global trends in vegetation fractional cover: Hotspots for change in bare soil and non-photosynthetic vegetation[J],2022,324.
APA	Hill, Michael J.,&Guerschman, Juan P..(2022).Global trends in vegetation fractional cover: Hotspots for change in bare soil and non-photosynthetic vegetation.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,324.
MLA	Hill, Michael J.,et al."Global trends in vegetation fractional cover: Hotspots for change in bare soil and non-photosynthetic vegetation".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 324(2022).