Document Details
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Document Type |
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Thesis |
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Document Title |
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Estimate the level of pollution in Al-Nawras Bay by using diatoms تقدير مستوي التلوث في بحيرة النورس باستخدام الدياتومات |
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Subject |
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Faculty of Sciences |
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Document Language |
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Arabic |
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Abstract |
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The present study was carried out on Al-Nawras Bay that located in the central part of the Northern Cornish of Jeddah City during the period from Spring 2008 to Winter 2009 to determine the diatoms in this bay as pollution biological indicator and to estimate the predominant Environmental circumstances vid determining The physical and chemical properties of the studied area. The bay under investigation is shallow and semi-closed. Four sites were selected for collecting the samples that located between (N 21° 36' 06.57'', E 39° 06' 25.06''), (N 21° 34' 34.93'', E 39° 06' 32.55''). Seventy two species of diatoms were found belonging to 26 genera. It was found two species pollution tolerant (Navicula salinarum and Nitzschia closterium) and one species that causing toxic harmful bloom (Amphora coffeaeformis). The highest cell numbers were recorded during the summer season in all tested sites at the following order: Site (A), Site (B), Site (C) and Site (D) where the recorded numbers were 45885, 24878, 5654 and 4108 cell/liter respectively. The highest amounts of chlorophyll-a, chlorophyll-c and carotenes were recorded in Site (A) where these amounts reached 3.53, 1.377, 1.302 mg/m3 consecutively. On the other hand, chlorophyll-b recorded the highest quantity at Site (B) with an average reached 0.43 mg/m3. No significant differences were recorded between the studies sites for each of temperature, salinity, dissolved oxygen and pH except the Site (A) that registered the lowest amounts of salinity and dissolved oxygen. Furthermore, Site (A) recorded the highest amounts of nutritious salts i.e., nitrites, nitrates, phosphate, ammonia, and silicates that reached 16.04, 40.47, 21.932, 8.31, 40.38 μm/l respectively. In general, the nutritious salt concentration decreased as it was moved south wards away from the pollution source. |
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Supervisor |
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prof. |
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Thesis Type |
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Master Thesis |
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Publishing Year |
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1431 AH
2010 AD |
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Added Date |
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Saturday, June 5, 2010 |
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Researchers
| رامي حسن الأحمدي | AL-AHMADI, RAMY HASSAN | Researcher | Master | |
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