title: Succession of aquatic microbial communities as a result of the water quality variations in continuous water.
abstract: The changes of structural and functional parameters of aquatic microbial communities in continuous water on campus of Tsinghua University, China are investigated, by polyurethane foam unit (PFU) method. The measured compositions of the communities include alga, protozoa, and some metazoa (such as rotifers). The measured indicators of water quality include water temperature, pH value, dissolved oxygen (DO), potassium permanganate index (COD(Mn)), total nitrogen (TN), total phosphorus (TP) and chlorophyll-a (Chla). The trophic level, expressed by the trophic level indices (TLIc), is assessed with analytic hierarchy process and principal component analysis (AHP-PCA) method. The changing trends of the structural and functional parameters of aquatic microbial communities, such as Margalef index of diversity (D), Shannon-weaver index of diversity (H), Heterotropy index (HI), number of species when the colonization gets equilibrium (S(eq)), colonizing speed constant (G) and time spent when 90 percent of S(eq) colonized in PFU (T(80%)), are also analyzed. The experimental results showed the succession of aquatic microbial communities along the water flow is consistent with the water quality changes, so the parameters of microbial community can reflect the changes of water quality from the ecological view.
authors.affiliation: Environment Stimulation and Pollution Control State Key Laboratory, Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China. richardwang00@mails.tsinghua.edu.cn
authors.forename: Rong-Chang
authors.initials: RC
authors.lastname: Wang
authors.forename: Xiang-Hua
authors.initials: XH
authors.lastname: Wen
authors.forename: Yi
authors.initials: Y
authors.lastname: Qian
mesh_terms: D000818:Animals; D044822:Biodiversity; D002681:China; D002734:Chlorophyll / Q000378:metabolism; D017753:Ecosystem; D004784:Environmental Monitoring / Q000379:methods*; D056890:Eukaryota / Q000502:physiology; D005618:Fresh Water / Q000032:analysis* / Q000382:microbiology; D006863:Hydrogen-Ion Concentration; D009584:Nitrogen / Q000032:analysis; D010100:Oxygen / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D011196:Potassium Permanganate / Q000378:metabolism; D025341:Principal Component Analysis; D013696:Temperature; D014871:Water Microbiology
chemical_list: D011196:Potassium Permanganate; D002734:Chlorophyll; D010758:Phosphorus; D009584:Nitrogen; D010100:Oxygen