Study the effect of some environmental variables on the abundance and distribution of submerged aquatic plants Al-Hammar marsh and Shatt al-Arab | ||
| basrah journal of science | ||
| Article 1, Volume 32, Issue 1, April 2014, Pages 20-42 PDF (0 K) | ||
| Author | ||
| Widad Mizban Taher al-Asadi | ||
| Abstract | ||
| This study aimed to identify some physical and Chemical environmental factors and its impact on the abundance and distribution of submerged aquatic plants to four stations selected of Al-Hammar marsh, Al-Barga, Al-Mndhura, Al-Harer and Al-Sada and three stations in the Shatt al-Arab that was Qramat Ali, al Sindbad and Al-Shalha or (Mahmdiat or Qrama) the samples of water and plant were collected monthly for one year, as estimated both water temperature and electrical conductivity and depth of water as physical variables and dissolved oxygen and reactive nitrates and phosphates concentration as chemicals variables to water samples, as well as estimated percentage of biomass of the vegetation and the frequency and the associated submerged aquatic plants. The results of study showed, high water temperature in summer months and decrease in winter, as it recorded the highest temperature (38)°C in August at Barga station. The highest value of electrical conductivity was recorded in Al-Barga station during May the values of dissolved oxygen Located within acceptable limits for all stations, the highest concentration was recorded in Al-Shalha station. Al-Shalha station recorded the highest depth of water column during December. The amount of nitrate the water samples was estimated and showed the high value in Al-Sindbad station up to (30.5)mg/L in July, while the lower values recorded in Al-Mndhura station in February and Al-Sada in July. And also the highest value of the reactive phosphate of water samples was recorded in Al-Qarma station during October. Also overall productivity of biomass was estimated for five submersible aquatic plant that was most commen and repetition during the period of study which included Ceratophyllum demarsum, Hydrilla verticillata, Potamogeton. H. verticillata characterized by its high biomass for all seasons of the year at the study station compared with other submersible aquatic plants except Al-Barga station which recorded a decrease of its biomass. The presence of submerged aquatic plants have been compared in this study between C. demarsum and H. verticillata common during the period of study with the existing submersible aquatic plants with them was the highest number of plants growth with C. demarsum reached (5) species submersible for more stations. The result of similarities showed between station selected to study the existence of a higher similarity between Al-Sindbad and Al-Shalha by Al-Qarma and Al-Sindbad and the lowest similarity between Al-Shalha and Al-Barga. | ||
| Keywords | ||
| Hydrilla; Ceratophyllum; physical and chemical factors; Shatt Al; Arab; hammar Marsh | ||
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