| 白洋淀湖沼湿地系统景观格局演变及驱动力分析 |
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| 引用本文： | 白军红,房静思,黄来斌,邓伟,李爱农,孔博.白洋淀湖沼湿地系统景观格局演变及驱动力分析[J].地理研究,2013,32(9):1634-1644. |
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| 作者姓名： | 白军红 房静思 黄来斌 邓伟 李爱农 孔博 |
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| 作者单位： | 1. 北京师范大学环境学院, 水环境模拟国家重点实验室, 北京100875;
2. 中国科学院水利部成都山地灾害与环境研究所, 成都604401 |
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| 基金项目： | 国家重点基础研究计划项目(2010CB951102);国家重大水专项(2009ZX0 7209-008-03);教育部新世纪优秀人才支持计划项目(NECT-10-0235) |
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| 摘 要： | 以白洋淀湖沼湿地系统为研究对象,分析了1979年、1991年、2000年和2006年4个时期白洋淀湖沼湿地系统景观格局演变过程及其湿地景观格局指数的动态变化,并剖析白洋淀湖沼湿地系统格局演变的驱动力。研究结果表明,研究期内湿地面积呈减少趋势,由1979年的404.5 km2缩减到2006年的338.4 km2,且减少部分大多转化为耕地;同时,各景观类型分布趋于集中分布,但景观多样性降低。1979-2006年期间,1979-1991年时段内的湿地景观格局指数变化最快,之后变缓。近30年内耕地斑块面积、边界密度和面积加权平均邻近指数最大;建设用地的斑块数量最多,斑块密度最大;各湿地景观类型的平均分维数都接近1,形状都比较简单。引起湿地系统景观格局演变的主要原因包括气候、水文过程以及社会经济和政策等因素。
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| 关 键 词： | 湖沼湿地系统 景观格局 景观格局指数 驱动力 白洋淀 |
| 收稿时间： | 2012-09-26 |
Landscape pattern evolution and its driving factors of Baiyangdian lake-marsh wetland system |
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| BAI Junhong;FANG Jingsi;HUANG Laibin;DENG Wei;LI Ainong;KONG Bo.Landscape pattern evolution and its driving factors of Baiyangdian lake-marsh wetland system[J].Geographical Research,2013,32(9):1634-1644. |
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| Authors: | BAI Junhong;FANG Jingsi;HUANG Laibin;DENG Wei;LI Ainong;KONG Bo |
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| Institution: | 1. State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China;
2. Institute of Mountain Hazards and Environment, CAS, Chengdu 604401, China |
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| Abstract: | Baiyangdian Lake is the largest natural lake in the North China Plain and it is also a typical inland wetland in the semi-arid zone. We analyzed the changes in landscape pattern evolution and landscape indices of Baiyangdian lake-marsh wetland system, and discussed the driving factors of these changes using remote images in the years of 1979, 1991, 2000 and 2006. Our results showed that the area of Baiyangdian lake-marsh wetlands exhibited a decreasing tendency in the study period. It covered 404.5 km2 in 1979 and decreased to 338.4 km2 in 2006, and the reduced wetlands were mainly converted to farmland. All types of landscapes exhibited a clustered distribution in this region, and their landscape diversity showed a decreasing trend. Over the past three decades, the great changes in landscape indices occurred during the period 1979-1991, and then the small changes were observed after 1991. Farmlands had the largest landscape indices including the patch area, the edge density and the area-weighted mean proximity index. The land for construction had the largest number of patches, followed by ditch wetlands. The average fraction of each wetland type approached to 1, indicating that they had simple shapes. The main driving factors causing landscape pattern change included climate, hydrological process and social and economic policies, etc. |
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