Despite being exceptional concentrations of valuable economic assets,yachts and marinas are typically overlooked in the geography of coastal risk.Focusing on the Mediterranean,which hosts the majority of the world’s ...Despite being exceptional concentrations of valuable economic assets,yachts and marinas are typically overlooked in the geography of coastal risk.Focusing on the Mediterranean,which hosts the majority of the world’s yacht activity,we examine three decades of yacht insurance claims in the context of natural hazards and marina development.We find indications that yachts and marinas manifest the same generic relationships between exposure,hazard,and vulnerability observed in terrestrial coastal-risk systems.Given the fundamental importance of yachts and marinas to nautical tourism and strategies for“Blue Economy”growth,particularly in Europe,the role of yachts and marinas in the dynamics of coastal risk must be better understood-but any such insight will first require standardised,comprehensive datasets of yacht movements and marina infrastructure.展开更多
We subjected seeds and shoots of eelgrass Zostera marina to different combinations of sediment loosening(0(control),5,10 cm in depth)and sediment fertilization(0(control),40,80,120,160 g/m^(2))through a field experime...We subjected seeds and shoots of eelgrass Zostera marina to different combinations of sediment loosening(0(control),5,10 cm in depth)and sediment fertilization(0(control),40,80,120,160 g/m^(2))through a field experiment involving seed sowing and shoot transplantation from September 2020 to September 2021.Growth analysis revealed optimum ranges for sediment fertiliza-tion and sediment loosening were 88.8-93.8 g/m^(2)and 5.3-5.8 cm for Z.marina seed sowing,as well as 79.7-86.7 g/m^(2)and 5.9-6.5 cm for Z.marina shoot transplanting,respectively.The shoot densities of Z.marina exposed to these optimum range of sediment fer-tilization and sediment loosening were 1.1-1.3 times of those in the control group.Porewater nutrients are key environmental factors affecting seed germination and shoot growth of Z.marina.The results provide valuable insights for enhancing restoration effects of Z.marina.展开更多
This study examines the efficacy of Avicennia marina(AM)leaves as an environmentally sustainable biosorbent for the extraction of methylene blue(MB)dye from wastewater.A hybrid approach of Response Surface Methodology...This study examines the efficacy of Avicennia marina(AM)leaves as an environmentally sustainable biosorbent for the extraction of methylene blue(MB)dye from wastewater.A hybrid approach of Response Surface Methodology(RSM)and Artificial Neural Networks(ANN)was implemented to assess,optimize,and forecast biosorption effectiveness across different operating parameters.The experimental design employed a Central Composite Design(CCD)methodology,focusing on critical parameters including pH,initial dye concentration,temperature,and biosorbent dosage.The ideal biosorption parameters were identified as a temperature of 44.3℃,pH 7.1,a biosorbent dosage of 0.3 grams,and an initial dye concentration of 48.4 mg/L,resulting in a maximum removal efficiency of 84.26%.The ANN model exhibited significant prediction accuracy,so confirming its appropriateness for predicting and enhancing intricate biosorption processes.The findings underscore that AM leaves constitute a cost-efficient,plentiful,and ecologically sustainable resource for wastewater treatment purposes.Furthermore,the amalgamation of RSM and ANN shown significant efficacy in process optimization and forecasting.These findings provide significant insights into the advancement of eco-friendly solutions for the treatment of dye-contaminated water.Subsequent study must prioritize the amplification of the procedure for industrial applications,the execution of ongoing system assessments,and the evaluation of the enduring environmental and economic ramifications of utilizing AM leaves as a biosorbent.展开更多
In 2014, a disease of black spot was found on leaves of Avicennia marina （ one of the mangroves） inDonghai island of Zhanjiang, Guangdong Province. By the method of pathogen-containing tissue isolation andpathogenic...In 2014, a disease of black spot was found on leaves of Avicennia marina （ one of the mangroves） inDonghai island of Zhanjiang, Guangdong Province. By the method of pathogen-containing tissue isolation andpathogenicity test, we obtained a pathogenic isolate bgrl. Based on morphological characteristics and sequence a^nalysis of rDNA-1TS and glyceraldehyde-3-phosphate dehydrogenase （gpd） gene, the isolate was identified asStemphylium lycopersici. This is the first report of leaf black spot on Avicennia marina in China.展开更多
文摘Despite being exceptional concentrations of valuable economic assets,yachts and marinas are typically overlooked in the geography of coastal risk.Focusing on the Mediterranean,which hosts the majority of the world’s yacht activity,we examine three decades of yacht insurance claims in the context of natural hazards and marina development.We find indications that yachts and marinas manifest the same generic relationships between exposure,hazard,and vulnerability observed in terrestrial coastal-risk systems.Given the fundamental importance of yachts and marinas to nautical tourism and strategies for“Blue Economy”growth,particularly in Europe,the role of yachts and marinas in the dynamics of coastal risk must be better understood-but any such insight will first require standardised,comprehensive datasets of yacht movements and marina infrastructure.
基金supported by the National Key Re-search and Development Program of China(No.2023 YFD2401102)the National Natural Science Foundation of China(No.42076100)the Joint Research Center for Conservation,Restoration&Sustainable Utilization of Marine Ecology of Ocean University of China-China State Shipbuilding Corporation Environmental Development Co.,Ltd.(No.H20240008).
文摘We subjected seeds and shoots of eelgrass Zostera marina to different combinations of sediment loosening(0(control),5,10 cm in depth)and sediment fertilization(0(control),40,80,120,160 g/m^(2))through a field experiment involving seed sowing and shoot transplantation from September 2020 to September 2021.Growth analysis revealed optimum ranges for sediment fertiliza-tion and sediment loosening were 88.8-93.8 g/m^(2)and 5.3-5.8 cm for Z.marina seed sowing,as well as 79.7-86.7 g/m^(2)and 5.9-6.5 cm for Z.marina shoot transplanting,respectively.The shoot densities of Z.marina exposed to these optimum range of sediment fer-tilization and sediment loosening were 1.1-1.3 times of those in the control group.Porewater nutrients are key environmental factors affecting seed germination and shoot growth of Z.marina.The results provide valuable insights for enhancing restoration effects of Z.marina.
文摘This study examines the efficacy of Avicennia marina(AM)leaves as an environmentally sustainable biosorbent for the extraction of methylene blue(MB)dye from wastewater.A hybrid approach of Response Surface Methodology(RSM)and Artificial Neural Networks(ANN)was implemented to assess,optimize,and forecast biosorption effectiveness across different operating parameters.The experimental design employed a Central Composite Design(CCD)methodology,focusing on critical parameters including pH,initial dye concentration,temperature,and biosorbent dosage.The ideal biosorption parameters were identified as a temperature of 44.3℃,pH 7.1,a biosorbent dosage of 0.3 grams,and an initial dye concentration of 48.4 mg/L,resulting in a maximum removal efficiency of 84.26%.The ANN model exhibited significant prediction accuracy,so confirming its appropriateness for predicting and enhancing intricate biosorption processes.The findings underscore that AM leaves constitute a cost-efficient,plentiful,and ecologically sustainable resource for wastewater treatment purposes.Furthermore,the amalgamation of RSM and ANN shown significant efficacy in process optimization and forecasting.These findings provide significant insights into the advancement of eco-friendly solutions for the treatment of dye-contaminated water.Subsequent study must prioritize the amplification of the procedure for industrial applications,the execution of ongoing system assessments,and the evaluation of the enduring environmental and economic ramifications of utilizing AM leaves as a biosorbent.
文摘In 2014, a disease of black spot was found on leaves of Avicennia marina （ one of the mangroves） inDonghai island of Zhanjiang, Guangdong Province. By the method of pathogen-containing tissue isolation andpathogenicity test, we obtained a pathogenic isolate bgrl. Based on morphological characteristics and sequence a^nalysis of rDNA-1TS and glyceraldehyde-3-phosphate dehydrogenase （gpd） gene, the isolate was identified asStemphylium lycopersici. This is the first report of leaf black spot on Avicennia marina in China.
