乐清湾互花米草高分遥感监测研究

Monitoring of Spartina AlternifloraInvasion by Using High Resolution Satellite Images in Yueqing Bay,Zhejiang Province

生物入侵是当今世界亟待解决的环境问题之一,互花米草是我国典型的海岸带入侵物种。文章利用2013—2014年的SPOT6高分影像数据,结合无人机低空航拍和野外调查,对乐清湾互花米草的空间分布特征进行系统调查和分析。结果表明:高分遥感影像和面向对象分类技术可有效用于互花米草监测和信息提取;乐清湾滩涂上已形成较大规模的互花米草盐沼群落,分布面积近24km2,且正处于迅速扩张阶段;湾内种质资源保护区和海洋特别保护区的环境现状不容乐观,互花米草对种质资源和红树林保护造成极大威胁。因此,互花米草的蔓延已严重影响乐清湾生态环境和区域经济发展,迫切需要实施科学的监测体系和治理措施。

Biological invasion is one of the three important environmental problems,Spartina alterniflorais a typical coastal invasive species.Based on 2013—2014SPOT6images,the spatial dynamics of Spartina alterniflora in Yueqing Bay were analyzed.In situ data and Unmanned Aerial Vehicle(UAV)images were used as supplementary data.The results showed that high resolution satellite images and object-based classification can be effectively used for coastal monitoring and information extraction.The area of Spartina alterniflorain research area was close to24km2 and kept expanding rapidly in the past decade.The environment conditions of two protection zones are not optimistic.Consequently,scientific monitoring systems and control measures should be carried out urgently.