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首页> 外文期刊>Arid Land Research and Management >Landscape Pattern Changes of Desert Oasis Wetlands in the Middle Reach of the Heihe River, China
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Landscape Pattern Changes of Desert Oasis Wetlands in the Middle Reach of the Heihe River, China

机译：黑河中游荒漠绿洲湿地景观格局变化。

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摘要

Desert oasis wetlands are distributed along the Heihe River, especially in lowland oases along the middle reach of the river, in northwestern China. Landscape maps of the wetlands in 1990, 1995, 2000, and 2006 were compiled based on data collected from Landsat TM and ETM+ images using GIS and analyzed in July 2008. Various landscape indices were calculated using the landscape structure analysis software FRAGSTATS, at both class and landscape levels. The results showed that floodplain wetland is the dominant type of wetlands in the middle reach of the Heihe River, followed by non-forested peatland, then river and reservoir wetland, with the proportion of shrub-dominated wetland low. During these 16 years, the area of wetlands in our study area decreased by 38.4%, or 107.8Â km2. The major type of wetland lost in the study area was non-forested peatland during the first five years, but floodplain wetland since then. The landscape pattern shows that the fragmentation level is very high, especially in the floodplain wetlands: the patch density increased by 154% during the study period. It is clear that the wetlands along the middle reach of the Heihe River have become increasingly fragmental during the past 16 years.
机译：沙漠绿洲湿地分布在黑河沿岸，特别是在中国西北部河中游的低地绿洲中。根据使用GIS从Landsat TM和ETM +图像收集的数据，编制1990、1995、2000和2006年的湿地景观图，并在2008年7月进行分析。使用景观结构分析软件FRAGSTATS计算这两个类别的各种景观指数。和景观水平。结果表明，洪泛区湿地是黑河中游的主要湿地类型，其次是非森林泥炭地，然后是河流和水库湿地，以灌木为主的湿地所占比例较低。在这16年中，我们研究区域的湿地面积减少了38.4％，即107.8 km 2 。在研究区域内，失去的湿地的主要类型是在最初的五年内没有森林的泥炭地，但是从那以后洪泛区湿地。景观格局表明，碎片化程度非常高，尤其是在洪泛区湿地中：在研究期间，斑块密度增加了154％。显然，在过去的16年中，黑河中游沿线的湿地变得越来越零散。

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  • 来源
    《Arid Land Research and Management》 |2010年第3期|p.253-262|共10页
  • 作者

    Shoubo Li Wenzhi Zhao;

  • 作者单位

    Linze Inland River Basin Comprehensive Research Station, Chinese Ecosystem Research Network;

    Key Laboratory of Ecohydrology of Inland River Basin, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, China;

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