福建省红树林分布时空变化与驱动因素分析

为了研究福建省红树林分布时空变化,应用多种规则相结合的专家系统方法,对福建省沿海地区的3个时相(1989年、1993年和2001年)的TM/ETM+影像进行分类,提取3个时相TM/ETM+影像中的红树林信息,同时,借助2003年SPOT影像以及辅助资料通过分辨率粗化后对影像进行目视判读,提取红树林信息,将两种方法得到的红树林数据用于分析1989年～2003年福建省红树林分布变化。结果表明,从1989年～2003年福建省红树林的整体面积呈现先减少后增长的趋势,从1989年的134.52hm2减少到1993年的128.14hm2,而到2001年增加到199.20hm2,到2003年面积达213.2hm2,但其中增加的面积是人工林,原生的红树林破坏严重,红树林资源质量呈现退化的趋势。通过收集历史资料与相关研究文献总结影响福建省红树林分布的主要因素,并针对福建省红树林资源面临的问题提出相应的解决对策与建议。

Distribution of Mangrove in Fujian Province

Three temporal Landsat TM/ETM+images such as 1989,1993 and 2001 were used to investigate the changes of mangrove in Fujian Province. Methods of expert systems were applied to classification of mangrove with distribution of mangrove with combination of various rules. SPOT images and supplementary data were also used to analyze distribution of mangrove in 2003 by handle interpretation following changing spatial resolution from 2.5m×2.5m to 30m×30m. Results showed the fluctuations for distribution of mangrove in the past 14 years. Areas of mangrove were reduced from 134.52hm2 in 1989 to 128.14hm2 in 1993,and rapidly increased to 199.20hm2 in 2001 and 213.2hm2 in 2003. Results implied that artificial mangrove increased but natural mangrove was being destroyed seriously in Fujian. Main factors influencing distribution of mangrove based on historic data and literatures were reviewed,and some advises for protecting mangrove resource were proposed.