山东青岛古镇口湾海草床分布现状及生态特征OA北大核心

Seagrasses are extensively distributed across tropical and temperate coastal waters,where they play a crucial role in providing ecological services.However,in recent years,seagrass resources in China have severely declined,necessitating conservation and restoration efforts to curb seagrass degradation.Preliminary surveys in Guzhenkou Bay,Qingdao,identified seagrass patches exhibiting signs of degradation,resulting in the initiation of seagrass restoration efforts.This study employed sonar detection technology along with station-based investigations to assess the distribution of restored seagrass beds,along with their biological characteristics and associated envi-ronmental factors.The findings indicated that the seagrass bed in Guzhenkou Bay consists of a single species,Zos-tera marina L.,with the current restored area spanning 20.42 hm2,surrounding a peripheral region measuring 55 hm2.The growth condition of Z.marina within the seagrass bed was favorable,as indicated by data collected in November 2023:vegetation cover of(67.22±22.63)%,shoot density of(599.59±217.94)shoots m-2,shoot height of(32.36±7.28)cm,and biomass of(204.27±89.64)g DW m-2.The average carbon and nitrogen content in seagrass tissues was measured at(33.02±2.85)%and(2.11±0.89)%,respectively.During the investigation,sig-nificant anthropogenic disturbances were observed around the seagrass bed.Additionally,due to its lower latitude,the seagrass bed is more susceptible to the ongoing effects of global warming compared with other Z.marina meadows in China.To prevent further degradation of the seagrass bed,it is recommended to implement effective protection and scientific management measures,including establishing seagrass bed protection zones,enhancing restoration efforts,and increasing public awareness.