福建东山海草床生态修复探索与实践OA

The seagrass bed is one of the three typical marine ecosystems,and it is also a representative type of ecosystem characterized by relatively low levels of protection.China has carried out the practice of seagrass bed conservation and restoration.However,seagrass beds along the South China coast are scattered in distri-bution,and restoration technologies and cases are still relatively scarce.There is still a lack of systematic res-toration research and engineering practice along the coast of Fujian.In this study,a methodological frame-work for identifying priority conservation and restoration areas of seagrass beds was established based on the coupling analysis of habitat suitability and human activity pressure.Suitable restoration habitats were scien-tifically screened and determined,and a complete technical system covering domestication,propagation and re-wilding of Zostera japonica was constructed.Furthermore,a field ecological restoration experiment was implemented in Dongshan Bay,Fujian Province,where seagrass beds had been completely degraded and disap-peared for many years,with continuous 8-month field monitoring conducted throughout the experiment.The results showed that the restoration seagrass showed strong environmental adaptability,and the ecological function was gradually restored.A variety of fish and invertebrates were active in the restoration area,and the sexual reproduction of seagrass was monitored.The density,coverage and plant height of the restored seagra-ss community showed a significant positive correlation during the monitoring period.This study has formed a systematic technical path in the site selection,seedling domestication and propagation,and ecological restora-tion effectiveness evaluation of seagrass bed restoration areas,which can provide reference and demonstration for the ecological restoration of seagrass beds in China and even the world.