生态学报2024，Vol.44Issue(18)：8247-8257,11.DOI:10.20103/j.stxb.202311022384
渤海湾滨海湿地互花米草分布与扩散特征
Distribution and diffusion characteristics of Spartina Alterniflora in the coastal wetlands of the Bohai Bay
摘要
Abstract
The Bohai Bay is the northernmost region in China where Spartina alterniflora is distributed and diffused.To comprehensively understand the status of S.alterniflora diffusion in the Bohai Bay,based on nearly 20 years of 10-meter resolution multi-source remote sensing data,the random forest classification model,and the Google Earth Engine(GEE)remote sensing cloud platform,the classification and identification of S.alterniflora in the Bohai Bay were conducted using remote sensing techniques.The spatial and temporal characteristics of S.alterniflora diffusion,diffusion patterns,influencing factors,and ecological and environmental responses to diffusion were discussed with the aim of providing data support for the management of S.alterniflora in the Bohai Bay and scientific management of coastal wetlands.The results showed that the annual growth rate of S.alterniflora in the Bohai Bay reached 21.62 hm2/a and the diffusion rate reached 8.85％in the past 20 years,which was still in a rapid diffusion stage in time,and showed a trend of spreading from the Tianjin Haihe River Estuary to the north and south in space.The main areas where S.alterniflora rapidly spread were semi-enclosed tidal flats formed by reclamation,estuarine wetlands,and tidal flats formed by aquaculture withdrawal.The landscape expansion pattern of S.alterniflora has evolved from outlying to edge expansion and gradually to infilling in recent years.The rapid spread of S.alterniflora in the Bohai Bay based on its special advantages of genetic development in the high latitude area,but it was more affected by the large-scale reclamation in the region,inappropriate reclamation projects and other factors on the rapid silting of tidal flat.The spread of S.alterniflora had positive effects on wave prevention and disaster reduction,but also had adverse effects such as crowding birds'habitat.It is necessary to consider the comprehensive effects and urgent needs of S.alterniflora in the Bohai Bay and formulate specific management plans scientifically and reasonably.关键词
渤海湾/互花米草/Google Earth Engine(GEE)/随机森林/扩散Key words
the Bohai Bay/Spartina alterniflora/Google Earth Engine/Random forest/expansion引用本文复制引用
程林,刘西汉,高翔,高玥,肖登攀..渤海湾滨海湿地互花米草分布与扩散特征[J].生态学报,2024,44(18):8247-8257,11.基金项目
河北省"三三三"人才工程资助项目(A202101047) （A202101047）
河北省科学院两院合作项目(23105) （23105）
河北省社会科学发展研究课题(20210201087) （20210201087）
河北省重点研发计划项目(22373301D) （22373301D）
