[Generalized behavior study on the growth dynamics for dominant algae species forming algal bloom in the three Gorges reservoir region].
From the blue-green algae species a representative algae, namely, ChloreUlla vulgaris (CV)to belong to Chlorophyta is selected as one of algae species studied in order to investigate the effect of TN, TP on the growth behavior of CV with the Monod equation, and calculate the semi-saturation constants of CV to TP(K(SP)) and TN(K(SN)). K(SN) >> K(SP) showed that the effect of TP on growth of CV is obvious significant than that of TN. The growth rate of Chlorella vulgaris is very sensitive to the concentration of phosphorus: Compares with the blank value, the special growth rate (mu) has been enhanced under the low concentration of 0.002 mg x L(-1), then the concentration turned to 0.2 mg x L(-1) the special growth rate (mu) has been enhanced obviously; but there was hardly any change under the concentration of nitrogen from 0.000 to 0.050 mg x L(-1). At the same time, in order to reveal whether there was a generalized character associating the growth dynamics of CV with that of dominant blue-green algae species, the dynamic models including CV constructed from our experimental data, dominant blue-green algae and sea algae from literature information have been compared and analyzed systemically, and the results showed that their growth dynamics behavior and ecological characteristic were extremely similar and common. According to extrapolation of the intercommunity of all growth dynamics we could describe and show availably there is a common behavior to the growth of dominant blue-green algae in the Three Gorges reservoir region. This conclusion would have some important theoretical and applied significance.
Chemistry & Chemical Engineering College, Chongqing University, Chongqing 400044, China. xaliu@cqu.edu.cn
Xin-an
XA
Liu
Li
L
Feng
Charles Q
CQ
Jia
D000460:Chlorophyta / Q000254:growth & development; D000458:Cyanobacteria / Q000145:classification / Q000254:growth & development*; D005068:Eutrophication; D005618:Fresh Water / Q000032:analysis* / Q000737:chemistry; D008954:Models, Biological; D009584:Nitrogen / Q000032:analysis*; D010758:Phosphorus / Q000032:analysis*; D011157:Population Dynamics; D045483:Rivers
D010758:Phosphorus; D009584:Nitrogen