Arid
DOI10.1002/ldr.2170
ECO-GEOMORPHOLOGICAL PROCESSES WITHIN GRASSLANDS, SHRUBLANDS AND BADLANDS IN THE SEMI-ARID KAROO, SOUTH AFRICA
Dickie, J. A.1; Parsons, A. J.2
通讯作者Dickie, J. A.
来源期刊LAND DEGRADATION & DEVELOPMENT
ISSN1085-3278
EISSN1099-145X
出版年2012
卷号23期号:6页码:534-547
英文摘要

Vegetation type and cover play an important role in the operation of geomorphological processes by controlling runoff and sediment dynamics. In drylands, land degradation is particularly sensitive to these eco-geomorphic interactions. Although many geomorphological studies of land degradation focus on the change in hydrological response as a function of vegetation cover, few have investigated how the autogenic response of plants may influence the susceptibility of soil to erosion through a change of soil resources. This study investigates the hypothesis that shrub communities possess greater soil parameter heterogeneity compared with grasslands and assesses how these different scales of heterogeneity can influence the susceptibility of soil to erosion. Soil samples were taken from seven 60?m?x?60?m plots within grasslands, shrublands and badlands situated in the Sneeuberg uplands of the central Karoo. One hundred and eight samples per plot were analysed for bulk density, organic matter, pH, conductivity and available sodium, calcium, magnesium, potassium and phosphorus. Geostatistical analyses determined that the grassland landscape was largely homogenous in its distribution of soil parameters, whereas shrublands demonstrated an increase in heterogeneity. Periodicity in the semi-variograms indicated that regular patterns across the landscape were evident for all parameters and thus likely to represent the differences between shrub and intershrub regions, areas of high and low erodibility. More pronounced patterns were identified in the badlands. This indicates that, if the conditions are right, changes in plant-soil interactions caused by soil parameter redistribution in shrubland landscapes can exacerbate erosion, leading to further degradation in the form of badlands. Copyright (c) 2012 John Wiley & Sons, Ltd.


英文关键词soil heterogeneity land degradation geostatistics Karoo South Africa badlands
类型Article
语种英语
国家England
收录类别SCI-E
WOS记录号WOS:000312541100004
WOS关键词VEGETATION CHANGE ; OVERLAND-FLOW ; INTERRILL RUNOFF ; LAND DEGRADATION ; SURFACE SOIL ; EROSION ; WATER ; DYNAMICS ; SCALE ; HETEROGENEITY
WOS类目Environmental Sciences ; Soil Science
WOS研究方向Environmental Sciences & Ecology ; Agriculture
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/173974
作者单位1.Univ Leicester, Dept Geog, Leicester LE1 7RH, Leics, England;
2.Univ Sheffield, Dept Geog, Sheffield S10 2TN, S Yorkshire, England
推荐引用方式
GB/T 7714
Dickie, J. A.,Parsons, A. J.. ECO-GEOMORPHOLOGICAL PROCESSES WITHIN GRASSLANDS, SHRUBLANDS AND BADLANDS IN THE SEMI-ARID KAROO, SOUTH AFRICA[J],2012,23(6):534-547.
APA Dickie, J. A.,&Parsons, A. J..(2012).ECO-GEOMORPHOLOGICAL PROCESSES WITHIN GRASSLANDS, SHRUBLANDS AND BADLANDS IN THE SEMI-ARID KAROO, SOUTH AFRICA.LAND DEGRADATION & DEVELOPMENT,23(6),534-547.
MLA Dickie, J. A.,et al."ECO-GEOMORPHOLOGICAL PROCESSES WITHIN GRASSLANDS, SHRUBLANDS AND BADLANDS IN THE SEMI-ARID KAROO, SOUTH AFRICA".LAND DEGRADATION & DEVELOPMENT 23.6(2012):534-547.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Dickie, J. A.]的文章
[Parsons, A. J.]的文章
百度学术
百度学术中相似的文章
[Dickie, J. A.]的文章
[Parsons, A. J.]的文章
必应学术
必应学术中相似的文章
[Dickie, J. A.]的文章
[Parsons, A. J.]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。