RT Journal Article ID 4c9f0b2133fc7b1b A1 Shevchenko, T. F. T1 Changes in the Structure of Phytoplankton under the Influence of Urea JF Hydrobiological Journal JO HYD YR 2001 FD 2001-12-01 VO 37 IS 6 OP 13 AB Heavy pollution of water by urea results in essential changes in the structure of phytoplankton. Cyanophyta proved to be most sensitive to the influence of high concentrations of ammonium. The quantitative indices of development of Cyanophyta decreased, whereas the numbers and biomass of Chlorophyta, primarily of Volvocales, increased with increasing the content of NH4+, ions in water. PB Begell House LK https://www.dl.begellhouse.com/journals/38cb2223012b73f2,7475cec276df79df,4c9f0b2133fc7b1b.html