دراسة مجتمع لافقريات القاع في بحيرة الدلمج وسط العراق

الملخص EN

Benthic invertebrates diversity on the Al-Dalmage the Lake in the middle of Iraq, in addition to the some chemical properties was the aim of the present study, for a period from January to the December 2013.

Six stations of the lake were chosen for monthly samples collection.

The result revealed that the water temperature ranged from (9-34) ◦C.

According to the values of salinity (1.5-14.6) ‰ the lake was classified as Brackish, while the pH values were neutral tends to near alkaline and ranged from (7.2- 9).

The study showed that the lake were well oxygenated due to the dissolved oxygen values which ranged from 7-12 mg/l.

The lake considered as very hard according to the total hardness values which range from (825-6980) CaCo3 mg/l.

A total of 21286 individual of benthic invertebrates were sorted from all study stations, belong to nine taxa, with the dominance of Crustacea, from which 6238 individuals were sorted in a percent of 29% of the total number of benthic invertebrates.

It was also noted that there was a Spatially and temporally variation in species distribution، The highest total number of 4360 individuals was recorded in St (2) while the highest total number recorded in April was 2624.