Arid
DOI10.1016/j.ecolind.2006.05.001
Leakiness: A new index for monitoring the health of arid and semiarid landscapes using remotely sensed vegetation cover and elevation data
Ludwig, John A.; Bastin, Gary N.; Chewings, Vanessa H.; Eager, Robert W.; Liedloff, Adam C.
通讯作者Ludwig, John A.
来源期刊ECOLOGICAL INDICATORS
ISSN1470-160X
出版年2007
卷号7期号:2页码:442-454
英文摘要

The health of and and semiarid lands needs to be monitored, particularly if they are used to produce food and fiber, and are prone to loss of vegetation cover and soil. Indicators of landscape health based on remotely sensed data could cost-effectively integrate structural and functional attributes of land surfaces across a range of scales. In this paper, we describe a new index for remotely monitoring changes in the health of land. The new index takes important aspects of landscape structure and function into account by focusing on the potential for landscapes to lose or ’leak’ (not retain) soil sediments. We combined remotely sensed vegetation patchiness data with digital elevation model (DEM) data to derive a quantitative metric, the landscape leakiness index, LI. This index is strongly linked to landscape function by algorithms that reflect the way in which spatial configuration of vegetation cover and terrain affect soil loss. Linking LI to landscape function is an improvement on existing indicators that are based on qualitatively assessing remotely sensed changes in vegetation cover. Using archived Landsat imagery and Shuttle Radar Topography Mission DEMs, we found for example that LI indicated improvements in the condition or health of a rangeland paddock that was monitored from 1980 to 2002. This paddock is located in central Australia and its improved health is documented by photographs and field data. Although the full applicability of LI remains to be explored, we have demonstrated that it has the potential to serve as a useful ecological indicator for monitoring the health of and and semiarid landscapes. (c) 2006 Elsevier Ltd. All rights reserved.


英文关键词DEM land condition landscape function landscape metrics rangelands vegetation patchiness
类型Article
语种英语
国家Australia
收录类别SCI-E
WOS记录号WOS:000244585600018
WOS关键词EROSION ; INDICATORS ; RANGELANDS ; SCALE ; BIODIVERSITY ; QUEENSLAND ; PATTERNS ; RUNOFF ; DESIGN ; MODEL
WOS类目Biodiversity Conservation ; Environmental Sciences
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
来源机构Commonwealth Scientific and Industrial Research Organisation
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/153995
作者单位(1)Trop Savannas Cooperat Res Ctr, Atherton, Qld 4883, Australia;(2)CSIRO, Sustainable Ecosyst, Atherton, Qld 4883, Australia;(3)CSIRO Sustainable Ecosyst, Ctr Arid Zone Res, Alice Springs, NT 0871, Australia;(4)Trop Savannas Cooperat Res Ctr, Winnellie, NT 0822, Australia;(5)CSIRO Sustainable Ecosyst, Winnellie, NT 0822, Australia
推荐引用方式
GB/T 7714
Ludwig, John A.,Bastin, Gary N.,Chewings, Vanessa H.,et al. Leakiness: A new index for monitoring the health of arid and semiarid landscapes using remotely sensed vegetation cover and elevation data[J]. Commonwealth Scientific and Industrial Research Organisation,2007,7(2):442-454.
APA Ludwig, John A.,Bastin, Gary N.,Chewings, Vanessa H.,Eager, Robert W.,&Liedloff, Adam C..(2007).Leakiness: A new index for monitoring the health of arid and semiarid landscapes using remotely sensed vegetation cover and elevation data.ECOLOGICAL INDICATORS,7(2),442-454.
MLA Ludwig, John A.,et al."Leakiness: A new index for monitoring the health of arid and semiarid landscapes using remotely sensed vegetation cover and elevation data".ECOLOGICAL INDICATORS 7.2(2007):442-454.
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