干旱区生态环境知识资源中心(Arid): Land degradation and sand dynamics in a steppe region (Naama, south-western Algeria)

Arid

DOI	10.3232/SJSS.2017.V7.N3.02
	Land degradation and sand dynamics in a steppe region (Naama, south-western Algeria)
	Grandi, M.; Hirche, A.; Fernandez-Ondono, E.; Martin-Peinado, F.; Salamani, M.; Belala, F.
通讯作者	Grandi, M
来源期刊	SPANISH JOURNAL OF SOIL SCIENCE
ISSN	2253-6574
出版年	2017
卷号	7 期号:3 页码:164-178
英文摘要	Land degradation is one of the most important environmental threats facing the international community. In North Africa, many semiarid and arid regions are suffering significant land degradation, which can be an impediment to sustainable development. Therefore; land degradation is monitored in a regional context for a better understanding of its causes and consequences. One of the main consequences is a notable increase in sand encroachment with negative environmental implications. For this reason, the dynamics of sands between south-eastern Morocco and the wilaya of Naama, south-western Algeria, was studied. Sand samples gathered from six distinctive areas were subjected to physicochemical, colorimetric (redness index), morphoscopic (circularity), and geochemical analysis, and studied statistically using an analysis of variance (ANOVA), wind direction data, ternary plots and a hierarchical cluster of trace elements (K, Rb, Fe, Ti, Ca and Sr). In all areas, a clear dominance of the sand fraction appeared showing percentages ranging from 89 to 96%. Sampled areas were all carbonated, and the pH was alkaline, with close values ranging from 8.4 to 9. The mean circularity values ranged from 0.67 in Merzouga (Morocco) to 0.80 in El Aguer (Algeria). The lowest value of the redness index was noted in Merzouga with a mean value of 4. The Algerian areas showed an almost similar redness index with a value of 6 but the highest value was noted in Saadana with a value of 11. Geochemical approaches, based on ternary plots and dendrogram cluster indicating the abundance of major elements (Fe, Ca and K), were used as indicators of wind transport. Results suggested the existence of a Regional Wind Action System (RWAS) implicated in the transport of sand from south-eastern Morocco and its redistribution towards south-western Algeria. Merzouga was connected to all areas but particularly to nearby Saadana and Kasdir in the Algerian territory.
英文关键词	Desertification sand encroachment trace elements wind erosion arid landscapes
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	ESCI
WOS记录号	WOS:000419287800002
WOS关键词	SOIL EVOLUTION ; TRANSPORT ; DUNES
WOS类目	Soil Science
WOS研究方向	Agriculture
Scopus学科分类	Univ Saad Dahleb, Fac Life & Nat Sci, Dept Biol Populat & Organisms, Blida 1 Route Soumaa,BP 270, Blida 09000, Algeria.
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/332465
作者单位	[Grandi, M.; Hirche, A.; Salamani, M.; Belala, F.] USTHB, Fac Biol Sci, Lab Vegetal Ecol, BP 32 El Alia, Algiers 16011, Algeria; [Grandi, M.] Univ Saad Dahleb, Fac Life & Nat Sci, Dept Biol Populat & Organisms, Blida 1 Route Soumaa,BP 270, Blida 09000, Algeria; [Fernandez-Ondono, E.; Martin-Peinado, F.] Univ Granada, Fac Ciencias, Dept Edafol & Quim Agr, Campus Fuentenueva S-N, E-18071 Granada, Spain; [Hirche, A.] Sci & Tech Res Ctr Arid Reg CRSTRA, BP 1682 RP, Biskra 07000, Algeria
推荐引用方式 GB/T 7714	Grandi, M.,Hirche, A.,Fernandez-Ondono, E.,et al. Land degradation and sand dynamics in a steppe region (Naama, south-western Algeria)[J],2017,7(3):164-178.
APA	Grandi, M.,Hirche, A.,Fernandez-Ondono, E.,Martin-Peinado, F.,Salamani, M.,&Belala, F..(2017).Land degradation and sand dynamics in a steppe region (Naama, south-western Algeria).SPANISH JOURNAL OF SOIL SCIENCE,7(3),164-178.
MLA	Grandi, M.,et al."Land degradation and sand dynamics in a steppe region (Naama, south-western Algeria)".SPANISH JOURNAL OF SOIL SCIENCE 7.3(2017):164-178.