珠江口桂山岛海域沉积物微生物群落特征分析

In this paper, the phylogenetic and metabolic features of microbial communities in Guishan Island (Pearl River Estuary) were analyzed using community-level physiological profiling (CLPP) and denaturing gradient gel electrophoresis (DGGE). The results showed that microbial community metabolic activity in sediment of mariculture areas (S8) was higher than that in the other sites. It indicated that mariculture has obvious impact on the marine microbial ecosystem. 17 dominant bacteria belonged to γ-Proteobacteria, δ-Proteobacteria, Bacteroidetes, Acidobacteria and Actinobacteria, with percentages of 27.8%, 19.8%, 23.1%, 22.2% and 7%, respectively. Furthermore, the relative percentage of δ-Proteobacteria in the sediment and the concentrations of heavy metals (Ni, Cr, Fe and Pb) had significantly positive correlation (P < 0.05).