Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.ecolind.2007.01.001 |
Detecting changes in riparian habitat conditions based on patterns of greenness change: A case study from the upper San Pedro River Basin, USA | |
Jones, K. Bruce; Edmonds, Curtis E.; Slonecker, E. Terrance; Wickham, James D.; Neale, Anne C.; Wade, Timothy G.; Riitters, Kurt H.; Kepnera, William G. | |
通讯作者 | Jones, K. Bruce |
来源期刊 | ECOLOGICAL INDICATORS |
ISSN | 1470-160X |
出版年 | 2008 |
卷号 | 8期号:1页码:89-99 |
英文摘要 | Healthy riparian ecosystems in and and semi-arid regions exhibit shifting patterns of vegetation in response to periodic flooding. Their conditions also depend upon the amount of grazing and other human uses. Taking advantage of these system properties, we developed and tested an approach that utilizes historical Landsat data to track changes in the patterns of greenness (Normalized Difference Vegetation Index) within riparian zones. We tested the approach in the Upper San Pedro River of southeastern Arizona of the US, an unimpounded river system that flows north into the US from northern Mexico. We evaluated changes in the pattern of greenness in the San Pedro River National Conservation Area (SPRNCA), an area protected from grazing and development since 1988, and in a relatively unprotected area north of the SPRNCA (NA). The SPRNCA exhibited greater positive changes in greenness than did the NA. The SPRNCA also exhibited larger, more continuous patches of positive change than did the NA. These pattern differences may reflect greater pressures from grazing and urban sprawl in the NA than in the SPRNCA, as well as differences in floodplain width, depth to ground water, and base geology. The SPRNCA has greater amounts of ground and surface water available to support a riparian gallery forest than does the NA, and this may have influenced changes during the study period. Estimates of the direction of greenness change (positive or negative) from satellite imagery were similar to estimates derived from aerial photography, except in areas where changes were from one type of shrub community to another, and in areas with agriculture. Change estimates in these areas may be more difficult because of relatively low greenness values, and because of differences in soil moisture, sun-angle, and crop rotations among the dates of data collection. The potential for applying a satellite-based, greenness change approach to evaluate riparian ecosystem condition over broad geographic areas is also discussed. (C) 2007 Elsevier Ltd. All rights reserved. |
英文关键词 | greenness change NDVI riparian ecosystems |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000250910000009 |
WOS关键词 | DIFFERENCE VEGETATION INDEX ; THEMATIC MAPPER DATA ; ARID RANGELANDS ; ANCILLARY DATA ; UNITED-STATES ; LANDSAT MSS ; ECOSYSTEMS ; ARIZONA ; FORESTS ; COVER |
WOS类目 | Biodiversity Conservation ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
来源机构 | United States Geological Survey ; E18 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/157060 |
作者单位 | (1)US EPA, Las Vegas, NV 89193 USA;(2)US EPA, Reston, VA USA;(3)US EPA, Res Triangle Pk, NC 27711 USA;(4)US Forest Serv, Raleigh, NC USA |
推荐引用方式 GB/T 7714 | Jones, K. Bruce,Edmonds, Curtis E.,Slonecker, E. Terrance,et al. Detecting changes in riparian habitat conditions based on patterns of greenness change: A case study from the upper San Pedro River Basin, USA[J]. United States Geological Survey, E18,2008,8(1):89-99. |
APA | Jones, K. Bruce.,Edmonds, Curtis E..,Slonecker, E. Terrance.,Wickham, James D..,Neale, Anne C..,...&Kepnera, William G..(2008).Detecting changes in riparian habitat conditions based on patterns of greenness change: A case study from the upper San Pedro River Basin, USA.ECOLOGICAL INDICATORS,8(1),89-99. |
MLA | Jones, K. Bruce,et al."Detecting changes in riparian habitat conditions based on patterns of greenness change: A case study from the upper San Pedro River Basin, USA".ECOLOGICAL INDICATORS 8.1(2008):89-99. |
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