Monitoring of phytoplankton biomass and nutrients in a polluted stream

Kocum E., Dursun O.

INTERNATIONAL JOURNAL OF ENVIRONMENT AND POLLUTION, vol.29, no.4, pp.505-517, 2007 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 29 Issue: 4
  • Publication Date: 2007
  • Doi Number: 10.1504/ijep.2007.014236
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.505-517


The spatial and temporal variations in the concentrations of nutrients (NH4+, NO2-, PO43-, SiO3-) and chlorophyll a were monitored simultaneously in a slow-flowing watercourse (Saricay Stream, Turkey), which runs in a rural-urban gradient. Chlorophyll a concentrations ranged between 0.044 mu g l(-1) and 206.15 mu g l(-1) and, in general, the higher concentrations of chlorophyll a and ammonium were measured downstream of the raw sewage outfalls. Nitrate was by far the most abundant form of inorganic nitrogen, and its concentration ranged between 411.71 mu M and 87.251 mu M. Silicates and phosphates were always potentially limiting to biomass relative to nitrogen. Agricultural run-off and point discharges from urban sources greatly affected the chemical composition of the water in the Saricay Stream and drove the system towards eutrophication.