TY - JOUR ID - TI - Effect of some environmental factors on the density of Odonata naiads in the temporary ponds of Basrah Province, South of Iraq. AU - Huda Kadhim Ahmed AU - Dhia Khalif Kareem PY - 2020 VL - 46 IS - 1 SP - 110 EP - 121 JO - Journal of Basrah Researches (Sciences) مجلة ابحاث البصرة ( العلميات) SN - 18172695 2411524X AB - The environmental effects of some factors (temperature, salinity, pH and dissolve oxygen) were studied to determine the monthly changes on the density of Odonata naiads in three temporary ponds: St.1-Abu Gosra, St.2- Al-Masehab and St.3-Al-Jilal, in Basrah Province, South of Iraq, during the period from December 2017 to November 2018. The results show that the total density of naiads was significantly positive correlation (p<0.01) with temperature and salinity, whereas it significantly negative correlation (p<0.01) with pH and dissolve oxygen. The highest density 124 ind./ m3 was recorded for Anisoptera in February at St.2 and 70 ind./ m3 for Zygoptera in April at St.1, while the lowest density was 3 and 2 ind./m3 were recorded for Anisoptera and Zygoptera in June at St.1 respectively. Temperature recorded a significant (P<0.05) variation, the air temperature ranged between 14- 46 ° C and the water temperature ranged between 12-38° C. The highest value of salinity reached 14 g / L in October at St.2, while the lowest values reached 1.2 g / l during November at St.3, pH values were ranged between 4.5 -8.2 in July at St.1 and in October at St.3 respectively, and the values of dissolved oxygen were ranged between 0.8- 10 mg / l in July at St.1 and January at St.3 respectively.

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