Investigation of Branchiostoma tsingdauense Resources and Community Characteristics of Macrobenthos in Changli Adjacent Sea Area,Qinhuangdao
In order to understand the current situation of Branchiostoma tsingdauense resources,a national second-class protected animal in the adjacent sea area of Changli,Qinhuangdao,and scientifically evaluate the ecological health status of the benthic environment in the waters,24 stations were set up in the adjacent sea area of Changli in the spring and summer of 2021 to investigate the macrobenthos and environmental factors.The Shannon-Wiener diversity index and AZTI Marine Biological Index(AMBI)and Multivariate AZTI Ma-rine Biological Index(M-AMBI)were used to evaluate the health status of macrobenthos communities in the adjacent sea area of Changli.The investigation results showed that the average density of B.tsingdauense in the adjacent sea area of Changli in summer of 2021 was 5 ind./m2,which was the lowest level in recent years.In spring and summer,the B.tsingdauense in the adjacent sea area of Changli was dominated by Ⅲ-year-old fish,and the abnormal phenomenon appeared in population age structure.A total of 89 species of macrozoobenthos were collected in spring and summer.There were some differences in the community struc-ture of macrozoobenthos between the two seasons,and the species replacement rate was higher.The average density of macrobenthos was 138 ind./m2 and the average biomass was 20.95 g/m2,and the average Shannon-Wiener diversity index was 2.11.The evaluation results of Shannon-Wiener diversity index,AMBI index,M-AMBI index and other ecological health evaluation methods were similar.The results showed that the benthic ecosystem in the survey area was disturbed to a certain extent.Compared with spring,the benthic ecosystem was more disturbed by human disturbance in summer.
Changli adjacent sea areamacrobenthosBranchiostoma tsingdauensecommunity structurema-rine ecosystem health
万方数据
维普
