The phytoplankton community structure and potential environmental impact factors in the Guangdong-Hong Kong-Macao Greater Bay Area were investigated in July 2019 and December 2020.151 and 146 species of phytoplankton were identified in summer and winter,respectively,and the community was dominated by diatoms,followed by dinoflagellates.The average abundance of phytoplankton in summer(13.75±3.98)×104 ind·L-1 was higher than that in winter(3.17±0.30)×104 ind·L-1.The mean values of diversity index and evenness in summer(2.36±0.23)and(0.61±0.06)were lower than those in winter(3.65±0.12)and(0.85±0.02).The dominant species had obvious seasonal succession.The dominant species were Pseudo-nitzschia Pungens,Skeletonema costatum,and Pseudo-nitzschia delicatissima in summer and Melosira sulcata var.sulcata,Naviculas sp.,Thalassionema nitzschioides,Nitzschia longissima and Cyclotella spp.in winter,respectively.The results of canonical correspondence analysis,Pearson correlation analysis and cluster analysis showed that temperature was one of the important environmental factors affecting phytoplankton abundance and community structure,and the other main factors included salinity,nutrient and turbidity.The phytoplankton communities in the Greater Bay Area showed obvious regional differences in summer and winter,which was closely related to the comprehensive influence of driving factors such as monsoon,Pearl River runoff and terrigenous emissions.
关键词
粤港澳大湾区/珠江口/浮游植物/群落结构
Key words
Guangdong-Hong Kong-Macao Greater Bay Area/Pearl River Estuary/phytoplankton/community structure
维普
万方数据