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盐城海滨自然湿地生态功能评价研究

发表时间:2009-11-15  浏览量:1165  下载量:405
全部作者: 李玉凤,刘红玉,朱丽娟,孙贤斌
作者单位: 江苏省环境演变与生态建设重点实验室,南京师范大学地理科学学院;皖西学院城市建设与环境系
摘 要: 根据水文地貌图件和遥感影像数据,借助ArcGIS 9.2的空间分析功能划分水文地貌单元(hydrogeomorphic unit, HGMU),再通过建立模型评价生态功能的空间分布特征。结果表明:河口带(5号HGMU)的生态功能(占47.09%)大于海滨带的任何一个HGMU;侵蚀岸段的生态功能较低,只占总量的1.27%;淤涨岸段中保护区核心区的生态功能最大,但是核心区向北和向南的缓冲区段生态功能减少很大,特别是南段的生态功能只有总量的1.47%,完全达不到缓冲区所应具备的功能。研究结果充分说明了不同水文地貌单元具备不同的生态功能,同时也说明由于不同岸段开发利用强度的不同,导致生态功能的空间差异明显。
关 键 词: 生态学;生态功能评价;水文地貌分类;海滨湿地
Title: Assessment of ecological function of coastal natural wetland in Yancheng
Author: LI Yufeng, LIU Hongyu, ZHU Lijuan, SUN Xianbin
Organization: Jiangsu Key Laboratory of Environmental Change and Ecological Construction, College of Geographical Science, Nanjing Normal University;Department of Urban Construction and Environment Science, West Anhui University
Abstract: The method of hydrogeomorphic classification to coastal wetland was accomplished by dint of spatial analysis of ArcGIS 9.2 version according to hydrogeomorphic map and remote sensing image data. Based on the classification and the rectified traditional estimation model, different hygrogeomorphic units (HGMUs) and spatial distribution characteristics of ecological function in different segments of the coast were obtained. The result shows that the ecological function of estuarine fringe (47.09%) is higher than any other HGMU of the coastal wetland. The ecological function index of corrosive coast is as low as 1.27% relatively of the total. A segment of the coast which the core area of nature reserve belongs to reaches the maximum ecological function, while it is decreasing gradually toward the north and the south. Especially in the southern part of the mud flat, which just accounts for 1.47% of all that is not as far as the buffer zones should possess. To make a conclusion from the result that the different HGMUs hold different ecological functions and the spatial difference of ecological function displays in multi-mudflat which is divided up in this paper because of the different threat of human activity.
Key words: ecology; ecological function assessment; hydrogeomorphic classification; coastal wetland
发表期数: 2009年11月第21期
引用格式: 李玉凤,刘红玉,朱丽娟,等. 盐城海滨自然湿地生态功能评价研究[J]. 中国科技论文在线精品论文,2009,2(21):2243-2251.
 
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