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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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流域土地利用/覆被变化对洪河保护区湿地景观的影响
DOI: 10.11821/xb200711010, PP. 1215-1222
Keywords: 洪河,土地利用,保护区,湿地景观
Abstract:
从流域尺度,应用遥感和GIS技术对1954年以来6个时段土地利用/覆被变化进行分析,并采用景观生态学方法对洪河保护区及其所在浓江河流域湿地景观多样性和景观连通度进行计算,系统研究了流域土地利用变化对保护区湿地景观的影响。结果显示①浓江河流域大规模土地利用发生在20世纪80年代之后,年均耕地面积增长速度为101km2/a；②土地利用/覆被变化直接导致流域湿地景观多样性降低,同时也间接影响了洪河保护区湿地景观多样性；③流域土地利用变化带来的景观连通度降低严重割断了景观之间原有的物质交换和功能维持关系,是导致保护区湿地景观结构和功能改变的主要因素之一；④恢复保护区周围一定面积的湿地,维持良好的景观连通度是实现保护区自然保护效益的方法之一。
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