Arid
DOI10.1016/j.geomorph.2013.04.012
Spatial patterns of infiltration vary with disturbance in a shrub-encroached woodland
Daryanto, Stefani1; Eldridge, David J.2; Wang, Lixin3,4
通讯作者Eldridge, David J.
来源期刊GEOMORPHOLOGY
ISSN0169-555X
出版年2013
卷号194页码:57-64
英文摘要

Woody plant encroachment is known to have substantial effects on a range of ecosystem processes. Research worldwide indicates that the area around shrubs and trees has higher levels of infiltration than the interspaces. Little is known, however, about the hydrological consequences of shrub removal on infiltration, and how this might be influenced by grazing. We examined the spatial patterns of infiltration across three treatments relating to shrub removal and grazing: (i) undisturbed (ungrazed, unploughed), (ii) grazed but unploughed, and (iii) grazed and ploughed. In general we found that disturbance was associated with a greater cover of bare soil but lower infiltrability, our laboratory-based measure of infiltration. At the undisturbed site, bare soil was patchy and localized, with an autocorrelation range or connectivity of 1.4 m. The autocorrelation range of infiltrability at this site (A(0) = 3 m) was larger than would be predicted from the size of the shrub canopy, and this was attributed to the presence of a well-developed understorey layer and biological soil crust community. At both grazed sites, infiltration was confined to the immediate canopy area of the remaining shrubs (A(0) = 1.2 m in the unploughed-grazed site). Additionally, there was increasing connectivity of bare soil with disturbance, up to 6.8 m at the ploughed-grazed site. With increasing disturbance, resource-rich shrub patches are likely to become more developed, further reinforcing their growth and persistence at the expense of the bare interspaces. Our results indicate the importance of shrubs for maintaining landscape connectivity, and the long-term unsustainable practice of removal by ploughing, which is likely to promote shrub dominance rather than suppression. (C) 2013 Elsevier B.V. All rights reserved.


英文关键词Grazing Infiltration Encroachment Semi-arid Woodland shrubs Spatial pattern
类型Article
语种英语
国家Australia ; USA
收录类别SCI-E
WOS记录号WOS:000320212700006
WOS关键词WOODY-PLANT ENCROACHMENT ; QUANTILE REGRESSION ; ECOSYSTEM ENGINEERS ; WATER INFILTRATION ; SEMIARID ECOSYSTEM ; CHIHUAHUAN DESERT ; SOIL NUTRIENTS ; NEW-MEXICO ; HETEROGENEITY ; GRASSLAND
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向Physical Geography ; Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/177382
作者单位1.Univ New S Wales, Sch Biol Earth & Environm Sci, Evolut & Ecol Res Ctr, Sydney, NSW 2052, Australia;
2.Univ New S Wales, Sch Biol Earth & Environm Sci, C Australian Wetlands Rivers & Landscapes Ctr, Off Environm & Heritage, Sydney, NSW 2052, Australia;
3.Indiana Univ Purdue Univ, Indianapolis IUPUI, Dept Earth Sci, Indianapolis, IN 46202 USA;
4.Univ New S Wales, Sch Civil Environm Engn, Water Res Ctr, Sydney, NSW 2052, Australia
推荐引用方式
GB/T 7714
Daryanto, Stefani,Eldridge, David J.,Wang, Lixin. Spatial patterns of infiltration vary with disturbance in a shrub-encroached woodland[J],2013,194:57-64.
APA Daryanto, Stefani,Eldridge, David J.,&Wang, Lixin.(2013).Spatial patterns of infiltration vary with disturbance in a shrub-encroached woodland.GEOMORPHOLOGY,194,57-64.
MLA Daryanto, Stefani,et al."Spatial patterns of infiltration vary with disturbance in a shrub-encroached woodland".GEOMORPHOLOGY 194(2013):57-64.
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