Particle Size Structure Characteristics of Zooplankton during Spring and Autumn in the Seagrass Areas of Xincun Port,Hainan Island
In order to explore the community structure characteristics of zooplankton with different particle si-zes in the seagrass bed area and its response mechanism to environmental factors,the particle size structure and important functional groups of zooplankton in different water areas of Xincun Port seagrass bed area in Lingshui County,Hainan Province were investigated and studied in April and November 2022,and the influ-encing factors of seasonal differences were also discussed.The results showed that a total of 65 species of zoo-plankton belonging to 40 genera and 37 families were identified in spring,and 20 types of planktonic larvae were identified.Small-sized copepod larvae/nauplii were dominant.In autumn,a total of 37 species of zoo-plankton,belonging to 25 genera and 23 families,and 19 species of planktonic larvae were identified.Noctilu-ca scientillans was the dominant species.There were seasonal differences in the number and abundance of zo-oplankton species.The number of species in spring was higher than that in autumn.The most prominent are-as were the sea area outside the bay and the seagrass growth area,with the majority of 600-1 250 and 355-600 µm species.The abundance of zooplankton was vice versa,the highest abundance was observed in the fish farming areas,with the abundance of 160-355 and 355-600 µm.In addition,the main limiting factors in spring were phosphate,silicate and suspended solids,which were significantly positively correlated with the abundance of zooplankton at 2 000-4 000 and 1 250-2 000 μm(P＜0.05).Salinity was significantly nega-tively correlated with zooplankton abundance at 2 000-4 000 μm(P＜0.01).The water depth was the main influencing factor in autumn,and there was a significant positive correlation with the abundance of small-sized zooplankton in 600-1 250,355-600,160-355 μm(P＜0.05).The abundance of zooplankton with different particle sizes in the seagrass bed area of Xincun Port showed seasonal changes,and there were different de-grees of correlation with environmental factors.Therefore,it is urgent to carry out long-term monitoring and research on the particle size structure of zooplankton in this area.
zooplanktonparticle size structureenvironmental factorsseagrass bedsHainan Xincun Port
万方数据
维普
