Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/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
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ISSN | 1470-160X |
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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