海南文昌沿岸海草床大型底栖动物群落结构特征及生态质量分析OA

To reveal the macrobenthos community structure characteristics,the ecological quality,and the de-gree of disturbance in the seagrass bed of Wenchang,this study systematically analyzed the community com-position,diversity,and driving factors based on survey data from 6 seagrass bed stations(W1—W6)in Wen-chang in 2018,2020,and 2022,using methods such as cluster analysis,Abundance/Biomass Comparison(ABC)curves,Redundancy Analysis(RDA),and Mantel test.The results showed that a total of 83 species of macrobenthos belonging to 64 genera,40 families of 5 categories were identified in the survey area,mainly in-cluding mollusks and crustaceans.The total number of species and density increased year by year,while the biomass showed an overall decreasing trend.The community was in a state of light pollution overall,while the pollution at the W5 and W6 stations intensified.Cluster analysis divided the community into 5 groups,and the community in 2022 was significantly different from that in the previous two years.The degree of commu-nity disturbance increased year by year(W4 and W5 stations experienced severe disturbance in 2022),mainly driven by human activities such as fishing.Meanwhile,the correlation between seagrass resources and the macrobenthos community changed from a significant positive correlation to a highly significant negative cor-relation.This study indicates that the macrobenthos community in the seagrass bed of Wenchang has adapted to environmental changes through strategies such as species composition replacement,while human disturb-ances have threatened the stability of the community.The revealed community dynamics and driving mecha-nisms can provide a scientific basis for the ecological restoration of seagrass beds and resource management.