干旱区生态环境知识资源中心(Arid): Spatiotemporal multi-index analysis of desertification in dry Afromontane forests of northern Ethiopia

Arid

DOI	10.1007/s10668-020-00587-3
	Spatiotemporal multi-index analysis of desertification in dry Afromontane forests of northern Ethiopia
	Gebru, Belay Manjur; Lee, Woo-Kyun; Khamzina, Asia; Wang, Sonam Wangyel; Cha, Sungeun; Song, Cholho; Lamchin, Munkhansan
通讯作者	Gebru, BM ; Lee, WK (corresponding author), Korea Univ, Dept Environm Sci & Ecol Engn, 145 Anamro, Seoul 02855, South Korea. ; Gebru, BM (corresponding author), Ethiopian Environm & Forest Res Inst, Mekelle Environm & Forest Res Ctr, Mekelle, Ethiopia. ; Lee, WK (corresponding author), Korea Univ, Div Environm Sci & Ecol Engn, Seoul 136713, South Korea.
来源期刊	ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY
ISSN	1387-585X
EISSN	1573-2975
出版年	2021
卷号	23 期号:1 页码:423-450
英文摘要	Land degradation and desertification is a great concern of arid and semiarid areas. Desertification trends in northern Ethiopia were quantified using the Normalized Difference Vegetation Index (NDVI), Topsoil Grain Size Index (TGSI), and Precipitation Concentration Index (PCI) calculated from 1990 to 2018 Landsat imagery and meteorological data from fourteen stations. A decision tree approach was used to assess the rate of desertification in northern Ethiopia using 1990, 1995, 2000, 2008, 2014, and 2018 Landsat 5 TM+ and Landsat 8 OLI data. A significant decline (P < 0.005) in mean NDVI was detected between 1990 and 2018 (mu = - 0.012 + 0.072), indicating that desertification has expanded over this time. The analysis showed a significant and positive spatial correlation (R-2 = 0.47; P < 0.0001) between the distribution of NDVI and the independent variables of precipitation and TGSI. Precipitation had the predominant impact on the NDVI. Monthly rainfall was characterized by a significant spatiotemporal variability (PCI > 20%) from 2001 to 2016 due to frequent droughts, particularly in northeastern Ethiopia. This desertification hot spot was confirmed through semi-variogram analyses. The overall findings from the multi-index assessment indicate decreasing vegetation cover, increasing ratio of coarse soil particles, as well as decline and high seasonal variability in rainfall. The desertification also appears linked to the rapid reduction in dense forests and shrublands in favor of bare and desert land as well as agricultural land. Therefore, major causes of land degradation in northern Ethiopia are both anthropogenic and natural climatic factors, requiring mitigating and adaptation actions primarily in northeastern Ethiopia.
英文关键词	Landsat Normalized Difference Vegetation Index (NDVI) Top Soil Grain Size Index (TGSI) Precipitation Concentration Index (PCI)
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000607296900021
WOS关键词	LAND DEGRADATION ; VEGETATION DYNAMICS ; COVER DYNAMICS ; AVHRR NDVI ; PRECIPITATION ; RAINFALL ; TEMPERATURE ; HIGHLANDS ; TRENDS ; REGION
WOS类目	Green & Sustainable Science & Technology ; Environmental Sciences
WOS研究方向	Science & Technology - Other Topics ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/347842
作者单位	[Gebru, Belay Manjur; Lee, Woo-Kyun; Khamzina, Asia; Wang, Sonam Wangyel; Cha, Sungeun; Song, Cholho; Lamchin, Munkhansan] Korea Univ, Dept Environm Sci & Ecol Engn, 145 Anamro, Seoul 02855, South Korea; [Gebru, Belay Manjur] Ethiopian Environm & Forest Res Inst, Mekelle Environm & Forest Res Ctr, Mekelle, Ethiopia; [Lee, Woo-Kyun] Korea Univ, Div Environm Sci & Ecol Engn, Seoul 136713, South Korea
推荐引用方式 GB/T 7714	Gebru, Belay Manjur,Lee, Woo-Kyun,Khamzina, Asia,et al. Spatiotemporal multi-index analysis of desertification in dry Afromontane forests of northern Ethiopia[J],2021,23(1):423-450.
APA	Gebru, Belay Manjur.,Lee, Woo-Kyun.,Khamzina, Asia.,Wang, Sonam Wangyel.,Cha, Sungeun.,...&Lamchin, Munkhansan.(2021).Spatiotemporal multi-index analysis of desertification in dry Afromontane forests of northern Ethiopia.ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY,23(1),423-450.
MLA	Gebru, Belay Manjur,et al."Spatiotemporal multi-index analysis of desertification in dry Afromontane forests of northern Ethiopia".ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY 23.1(2021):423-450.