Affiliations: State Key Laboratory of Pollution Control and Resource
Reuse, School of Environment, Nanjing University, Nanjing 210093, China | The Modem Analysis Center, Nanjing University, Nanjing
210093, China | Nanjing Institute of Geography and Limnology of CAS,
Nanjing, 210008, China
Abstract: Growth and uptake of exogenous phosphate by Microcystis
aeruginosa in batch culture under different temperature, photoperiod, and
turbulence were studied by the method of phosphate isotope tracer. Relatively
high temperature, long photoperiod and strong turbulence increased the cell
density of M. aeruginosa in these batch cultures. The initial rapid uptake of
phosphate by M. aeruginosa was independent of the temperature, photoperiod, and
turbulence. Similarly, maximum exogenous phosphate uptake was not related to
these environmental factors. However, elevated temperature and turbulence
shortened the time, required to obtain maximum P accumulation. The growth of M.
aeruginosa could alleviate the phosphorous leakage. Total amounts of exogenous
phosphate uptake to M. aeruginosa and the phosphorus leakage of M. aeruginosa
were significantly influenced by the growth state of M. aeruginosa closely
correlated with the environmental factors. The maximum volume of
exogenous phosphate uptake to M. aeruginosa was 46% of added exogenous phosphate
in water with 16 hours of photoperiod. Thus, total amounts of exogenous
phosphate uptake to M. aeruginosa were more strongly affected by the photoperiod
length than temperature and turbulence.
