Koçum, EsraDursun, Onur2025-01-272025-01-2720070957-43521741-5101https://doi.org/10.1504/IJEP.2007.014236https://hdl.handle.net/20.500.12428/24936The 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.eninfo:eu-repo/semantics/closedAccesschlorophyll anutrientsphytoplanktoneutrophicationSaricayStream TurkeyArticle29450551710.1504/IJEP.2007.014236Q4WOS:0002487529000152-s2.0-34547728217Q4