福州市沿海区县生态健康评价及动态分析

Ecological Health Assessment and Dynamic Analysis of Coastal Areas in Fuzhou

基于Landsat遥感影像数据,通过监督分类获取福州市沿海区县土地利用分类结果,在此基础上计算各景观格局指标,并应用综合指数法构建PSR模型,评价1996—2017年间福州市沿海区县的生态系统健康状况,分析研究区内生态健康状况的空间格局变化以及所面临的主要生态压力。研究结果表明:1996—2017年间罗源县、连江县生态健康状态得以改善,而市辖区、长乐市、福清市、平潭县总体疾病状态增长了7.3倍;沿海区县疾病及不健康状态演变过程以市辖区为源头,沿闽江流域向沿海地区蔓延,主要影响因素为建设用地的急剧扩张。

Based on the Landsat remote sensing images,this paper calculated the landscape pattern indicators through supervised classification results,and constructed the PSR model by using the comprehensive index method.It aimed at evaluating the changes of ecosystem health status of Fuzhou coastal counties during 1996-2017,and analyzing the main ecological pressures to provide reliable research basis for new Fuzhou construction and ecological planning.The results showed that:the ecosystem health levels in Luoyuan and Lianjiang had been improved from 1996 to 2017,while the total area of disease level in urban districts,Changle,Fuqing and Pingtan had increased by 7.3 times.The disease and unhealthy level areas in coastal counties spread from the municipal districts to the coast alongside the Minjiang River due to the rapid expansion of construction land.