مجتمع الحشرات المائية في ثلاث بيئات مائية مختلفة في جنوب العراق

الملخص EN

The present investigation is aimed to study the aquatic insects occurance and biodiversity in three aquatic ecosystems at southern of Iraq ,consist of tidal river(Shatt Al-Arab),tidal marsh(east Hammar)and non tidal marsh(Um Al-Shoowaich and AlChebaeish).

Samples for 12 months were taken during the period from April 2014 to March 2015.

Some physic-chemical features were measured monthly in all chosen stations.The result of ANOVA was significant (P<0.01) for electrical conductivity, turbidity, , total dissolved soild, total hardness, Calcium, sulphate and total organic carbon while it was non significant for the air and water temperatures, pH , dissolved oxygen, biological oxygen demand, nitrate and phosphate.

During the study 36 taxa of aquatic insects were recorded,28 genus of them were first record in the wetlands.these taxa were belong to six orders(Diptera,Odonata,Coleoptera,Hemiptera,Trichoptera, Neuroptera).The highest monthly density 322 ind/m2 to genus Symbiocladius in Burka at feberwary,and The highest monthly density 485 ind/m2 for the aquatic insect group.the highest relative abundance was 77% for Symbiocladius in Mohamadiat.About the ecological indices,the highest value for spatial diversity were 1.29 and 3.683 for diversity and richness respectively,and for the temporal diversity were 2.01 and 2.717 for diversity and richness respectively.The highest value of Beta diversity 1.66 was recorded between tidal and non tidal marsh of Al-Chebaeish.