Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/S0140-1963(05)80017-5 |
THE MORPHOLOGY AND ORIGIN OF NABKHAS, REGION OF MOPTI, MALI, WEST-AFRICA | |
NICKLING, WG; WOLFE, SA | |
通讯作者 | NICKLING, WG |
ISSN | 0140-1963 |
出版年 | 1994 |
卷号 | 28期号:1页码:13-30 |
英文摘要 | Nabkhas near Mopti in Mali, West Africa have formed as a result of continued cultivation coupled with grazing during periods of severe drought. Dune development at three investigated sites was initiated after the onset of drought conditions. The dunes have formed on deltaic soils which were previously cultivated. Although most of the dunes are at least partially vegetated, the interdune surfaces are generally devoid of vegetation, highly compacted and continually disturbed by animals. The dunes are elongate and average 0.57 m high, 3.45 m wide and 5.45 m long. They are strongly aligned ESE-WNW with stoss (windward) sides oriented towards the ESE. Dune sediments are sandier and better sorted than the parent deltaic soils but contain a high proportion of silt and clay thought to be transported onto the dunes as sand-sized aggregates. The nabkhas have developed as a consequence of climatic and anthropogenic stresses on the arid ecosystem and are linked to desertification within the region. Ongoing disturbance from grazing and cultivation will cause further vegetation reduction and surface destabilization and may result in more widespread dune development. |
英文关键词 | DESERTIFICATION AEOLIAN DUNES WIND EROSION |
类型 | Article |
语种 | 英语 |
收录类别 | SCI-E |
WOS记录号 | WOS:A1994PF21100002 |
WOS关键词 | SOUTHERN NEW-MEXICO ; MESQUITE DUNELANDS ; FORMER GRASSLANDS ; SHADOW DUNES ; DROUGHT ; SAHEL ; RAINFALL |
WOS类目 | Ecology ; Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/130240 |
推荐引用方式 GB/T 7714 | NICKLING, WG,WOLFE, SA. THE MORPHOLOGY AND ORIGIN OF NABKHAS, REGION OF MOPTI, MALI, WEST-AFRICA[J],1994,28(1):13-30. |
APA | NICKLING, WG,&WOLFE, SA.(1994).THE MORPHOLOGY AND ORIGIN OF NABKHAS, REGION OF MOPTI, MALI, WEST-AFRICA.,28(1),13-30. |
MLA | NICKLING, WG,et al."THE MORPHOLOGY AND ORIGIN OF NABKHAS, REGION OF MOPTI, MALI, WEST-AFRICA".28.1(1994):13-30. |
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