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生态学杂志 ›› 2012, Vol. 31 ›› Issue (08): 2082-2090.

• 研究报告 • 上一篇    下一篇

基于GIS的长江三峡水库消落带生态类型划分及其特征

雷波,杨春华,杨三明**,周玉,张晟,王业春   

  1. (重庆市环境科学研究院, 重庆 401147)
  • 出版日期:2012-08-10 发布日期:2012-08-10

GISbased division of ecological types and their characteristics of waterlevelfluctuating zone in the Three Gorges Reservoir of Yangtze River.

LEI Bo, YANG Chun-hua, YANG San-ming**, ZHOU Yu, ZHANG Sheng, WANG Ye-chun   

  1. (Chongqing Academy of Environmental Science, Chongqing 401147, China)
  • Online:2012-08-10 Published:2012-08-10

摘要: 利用GIS技术,以水位高程变化、库岸坡度和小尺度地形地貌特征为依据,在数字地形图上,制作水位高程坡度图和小尺度地形地貌图,通过图形叠加分析,对长江三峡水库消落带进行生态类型划分。结果表明:三峡水库消落带生态类型可划分为经常性水淹型(缓坡型、陡坡型)、半淹半露型(缓坡型、陡坡型)、经常性出露型(缓坡型、陡坡型)、岛屿型(常淹型、出露型)、湖盆-河口-库湾-库尾型(湖盆型、河口型、库湾型、库尾型)、峡谷型等6大类12个亚类;半淹半露型、经常性出露型和湖盆-河口-库湾-库尾型,占消落带总面积的82.2%,应以人工生态修复为主、自然恢复为辅;而经常性水淹型、岛屿型和峡谷型占17.8%,应以自然恢复为主、人工生态修复为辅。  

关键词: 木质纤维素酶, 质量损失, 高山林线交错带, 锦丝藓, 高山冷蕨

Abstract: By using GIS technology, and taking water level change, bank slope of reservoir, and small scale geomorphology as the environmental evaluation indicators, the water level elevationslope and spatial geomorphological maps of the Three Gorges Reservoir were drawn, based on the digital topographic map, and, through overlay analysis, the ecological types of waterlevelfluctuating zone (WLFZ) in the Reservoir were classed. The ecological types of the WLFZ could be classified into 6 classes and 12 subclasses, including perennial submerged WLFZ (gentle slope and steep slope), periodic submerged WLFZ (gentle slope and steep slope), perennial nonsubmerged WLFZ (gentle slope and steep slope), island WLFZ (submerged and nonsubmerged), lake basinestuaryreservoir bayreservoir tail WLFZ (lake basin, estuary, bay, and reservoir tail), and valley WLFZ. The periodic submerged WLFZ, perennial nonsubmerged WLFZ, and lake basinestuaryreservoir bayreservoir tail WLFZ together accounted for 82.2% of the entire WLFZ area, indicating that the three main ecological types should be artificial ecological restorationbased and supplemented by natural recovery, while the perennial submerged WLFZ, island WLFZ, and valley WLFZ accounted for 17.8% of the entire WLFZ area, which should be natural recoverybased and supplemented by artificial ecological restoration.

Key words: lignocellulose enzyme, mass loss, alpine timberline ecotone, Actinothuidium hookeri, Cystopteris montana.