Preliminarystudy on the structure of the nearshore decomposing Laminaria ja-ponica microbial community in Dalian City
In order to study the culturable bacterial community structure of Laminaria japonica in two sea areas of Dalian City,the sporophytes and seawater of Laminaria japonica were collected from Dalijia Sea Area and Longwan-gtang Sea Area respectively in March 2023.Plate coating method was used to obtain the sequenced bacterial flora samples.A total of 132 species annotations were obtained after sequencing quality control treatment.The results showed that Proteobacteria was the dominant bacterial group in Laminaria.At the genus level,the related dominant genus of Laminaria japonica is Pseudoalteromonas.The dominant genus related to seawater is Psychromonas.The common strains of Laminaria japonica and seawater include Psychromonas arctica and Pseudoalteromonas elyakovii,Pseudoalteromonas distincta,and Pseudoalteromonas arctica.The relationship between the algin-producing strain and the ulceration of Laminaria japonica remains to be further studied.