Marine ranching is a new model for restoring marine ecological environment and conserving offshore fishery resources. Offshore wind power is a new clean energy industry in China. Based on the analysis of the construction of offshore wind farms in Guangdong Province, this article proposes to actively promote the integrated development of offshore wind power and marine ranching. The suitability and deployment conditions of Sargasso algae reef construction in offshore wind farms, the feasibility of developing an integrated development model featuring artificial algae reefs + offshore wind farms in Guangdong Province, as well as the importance of ecological sea area use and management were discussed. Regarding the necessity of intensive and economical utilization of sea and sea resources, it is believed that the development model of "marine ranching + offshore wind power" will become an important direction for improving the comprehensive utilization of sea areas in the future.

Five municipal sewage sludge leachate from Guangzhou and Foshan was selected for exploring the biological toxicity effect on four marine organisms at different trophic levels,including Vibrio fischeri,Moina mongolica,Artemia franciscana,larval Ctenogobius gymnauchen.Results showed that the biological toxicity of the leachate was significant,in which higher Cu concentration was found.Furthermore,the toxicity effect on four marine organisms was higher in Guangzhou than Foshan.Artemia franciscana was sensitive to all the samples,and exhibited different LC50 to different sludge leachate.EC50 for Vibrio fischeri was highly correlated with LC50 for Artemia franciscana and Moina mongolica,while its toxicity test approach was much simpler.The study can provide data sources for the biological toxicity evaluation of municipal sewage sludge and for selecting suitable marine organisms for this toxicity evaluation.