Monitoring of phytoplankton biomass and nutrients in a polluted stream


Kocum E. , Dursun O.

INTERNATIONAL JOURNAL OF ENVIRONMENT AND POLLUTION, cilt.29, ss.505-517, 2007 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 29 Konu: 4
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1504/ijep.2007.014236
  • Dergi Adı: INTERNATIONAL JOURNAL OF ENVIRONMENT AND POLLUTION
  • Sayfa Sayıları: ss.505-517

Özet

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.