Characteristics of Soil phoD-Harbouring Bacteria Community in the Water Level Fluctuation Zone of the Three Gorges Reservoir Area
To investigate the characteristics of the phosphate-solubilizing bacterial community in the Water Level Fluctuation Zone(WLFZ)of the Three Gorges Reservoir(TGR)Area,soil samples were collected at different altitudes in May,2021.The contents of total phosphorus(TP),inorganic phosphorus(IP)and organic phosphorus(OP),and activities of acidic phosphatase(ACP)and alkaline(ALP)phosphatase were analyzed.The community structure of phoD-harbouring bacteria was determined,and its relationship with soil performance parameters was also investigated.The results showed a significant decline in the richness of the soil phoD-harbouring bacterial community in the WLFZ with decreasing altitudes(P＜0.05).Moreover,variations in dominant phyla and genera were observed in soils at different altitudes.Among these,one phylum,one class,one order,four families,and six genera exhibited significant differences between altitudes.A taxon from the phylum Verrucomicrobia exhibited higher abundance in soils at an altitude of 175 m while the family Streptosporangiaceae and the genus Aquisphaera showed higher abundance in soils at altitudes of 155 m and 165 m,respectively,suggesting a potential source from the bottom sediment.Spearman correlation analysis demonstrated a significant correlation between the diversity of the phoD-harbouring bacterial community and altitudes as well as IP contents.Distance-based redundancy analysis(db-RDA)confirmed that TP and IP were the primary environmental factors influencing the structure of the phoD-harbouring bacterial community in the WLFZ of the TGR.
the Three Gorges Reservoir Areawater level fluctuation zonephosphorus cyclecommunity structurephoD gene
NETL
NSTL
万方数据
