Temporal and spatial variation characteristics of net-collected phytoplank-ton community structure and its relationship with key environmental factors in the artificial reef area of Xiangyun Bay,Hebei Province
In order to investigate the characteristics and spatial-temporal variations of the phytoplankton com-munity in artificial reef areas,as well as to elucidate the relationship between phytoplankton abundance and envir-onmental factors associated with artificial reef construction,four surveys were conducted in 2021(May,August,November)and 2022(January)at two artificial reef areas and a control area in Xiangyun Bay.A total of 70 phyto-plankton taxa belonging to 39 genera and 3 classes were identified in this study.The annual average abundance of phytoplankton in the artificial reef areas was recorded as 313.5×104 cells/m3,which were 1.4 times higher than that observed in the control area.Except in spring,the richness index,diversity index and evenness index of phytoplank-ton in the artificial reef areas were higher than those in the control area.The succession rate of dominant species from spring to summer and from summer to autumu in the reef areas were lower than that in the control area,sug-gesting greater stability of community structure within artificial reef areas compared to the control area.The biolo-gical increment index for each phytoplankton taxon ranged from 0.9 to 3.6;notably,Bacillariophyta displayed an average biological increment index value of 1.8.Pearson correlation analysis revealed that phytoplankton abund-ance was primarily influenced by TP,TN,NH4-N,NO3-N and DIP;significant seasonal differences were observed among these variables.These findings demonstrate that artificial reef construction has a positive conservation ef-fect on phytoplankton communities closely related to temporal and spatial changes in nutrient availability.
NETL
NSTL
万方数据
