Dynamic Changes of Plateau Wetlands in Madou County, the Yellow River Source Zone of China: 1990᾿013
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- 作者：Xilai Li ; Zaipo Xue ; Jay Gao
- 关键词：Wetland change detection ; Causes of wetland change ; Remote sensing ; Causes of wetland loss ; Maduo ; The Yellow River source zone of China
- 刊名：Wetlands
- 出版年：2016
- 出版时间：April 2016
- 年：2016
- 卷：36
- 期：2
- 页码：299-310
- 全文大小：963 KB
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Zaipo Xue (1)
Jay Gao (2)
1. State Key Laboratory of Plateau Ecology and Agriculture, College of Agriculture and Animal Husbandry, Qinghai University, Xining, 810016, China
2. School of Environment, The University of Auckland, Private Bag 92019, Auckland, New Zealand - 刊物主题：Freshwater & Marine Ecology; Environmental Management; Ecology; Hydrogeology; Coastal Sciences; Landscape Ecology;
- 出版者：Springer Netherlands
- ISSN：1943-6246
文摘
Plateau wetland is a special kind of ecosystem highly vulnerable to change and shrinkage owing to natural fluctuations and external disturbance. In the past wetlands have been mapped as a single category, making it difficult to assess the relative importance of natural and anthropogenic variables in the change. In this study, wetlands in Maduo County in the headwater zone of the Yellow River were mapped into six types based on their hydro-geomorphic properties from Landsat satellite images of 1990, 2001 and 2013. The changes between wetlands and non-wetlands in two separate decades were detected from the produced wetland maps in ArcGIS. The obtained results indicate that there were 8542 km2 of wetlands (about 33 % of the county’s territory) in 1990. They shrank to 7,061 km2 in 2001, but expanded to 7,972 km2 in 2013. During 1990–2001 all six types of wetland suffered a loss, with alpine wetland shrunk the most, followed by piedmont wetland. In general, the higher the ground at which a wetland was located, the more it lost. This trend of decrease was reversed in almost the same order during 2001–2013. Namely, the higher the ground of the wetland, the more it gained. Analysis of climate data suggests that temperature is not critical to the observed change in wetland area. Instead, it is the warm season rainfall that has exerted the most influence over the observed change. Population bears no clear relationship with wetland change. The reduced sheep population by 54.5 % during 2001–2013 helped to improve the eco-environment of the study area and to reverse the shrinking trend of wetlands.