الاختلافات الشهرية في تراكيز المغذيات و الكلوروفيل في مياه هور أبو زرك، جنوب العراق

الملخص EN

Variations in concentrations of nutrients (nitrate, nitrite phosphate, and Silicate) along with chlorophyll- a values were investigated on monthly basis in Abu Zirk Marsh.

The study extended from August 2008 to July 2009.

Three stations were selected for comparison.Nitrate showed detectable increase in June and the highest concentration was 7.6 µ atom N/ L, but the lowest 0.1 µ atom N/ L in Febrewary.Nitrite reveals the highest concentration (3.9 µ atom N/ L) in Febrewary and the lowest (0.5 µ atom N/ L) in November.

Phosphates exhibited gradual rise in values during November to achieve peak (33.4 µ atom P/ L).

The minimal (1.6µ atom P/ L) was encountered in September.

Silicate reveals the highest concentration (2911 µ atom Si/ L) in Febrewary and the lowest (1997µ atom Si/ L) in July.The lowest recorded values for chlorophyll- a was 4.2 mg/m3 and the highest 10.2 mg/m3 .

No any previous ecological study was recorded for the investigated site.