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| [9001666.] كود البحث : | 9001666 - 2016/12/18 |
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Plant Life along Rosetta Branch of River Nile in Egypt: Environment-Vegetation Relationship / |
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| تخصص البحث : |
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Mansoura Journal of Environmental Sciences - Egypt JOESE / Vol.45 No.3.4 - Septemper 2016 |
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تاريخ تقديم البحث 18/12/2016 |
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تاريخ قبول البحث 18/01/2017 |
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عدد صفحات البحث 29 |
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صدام حميد رشيد المعموري |
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د/ ياسر أحمد محمود السيد الامير - مؤلف رئيسي |
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Vegetation, hydrophytes, sediments, water chemistry, Rosetta branch |
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The Rosetta branch runs for about 220 km in length with average width 180 m and with depth varies between 1.5 – 16.0 m. It receives polluted waters from different sources including industrial, agricultural and urban sewage that are causing serious environmental impacts on its freshwater. In the present study the total number of hydrophytes and terrestrial bank plants recorded is 50 species belonging to 40 genera grouped under 20 families. On the basis of duration, the recorded species are grouped into two categories: 32 perennials and 18 annuals. Vegetationally, the identified groups in the present work can be classified into two main categories: the first category of the ecological site 3 (Edfina - Rosetta) includes groups A and B, and the second category of the ecological site 1 and 2 (El-Qanater El-Khayria to Khom Hamada and Khom Hamada - Edfina) comprises groups C and D. The application of Canonical Correspondence Analysis indicates that, the most effective hydrosoil variables which significantly correlated with the abundance and distribution of vegetation groups are: sodium, calcium, pH, total nitrogen, bicarbonates and chloride. On the other hand, chlorides, total nitrogen, cations, electrical conductivity and BOD of water showed close correlation with the identified vegetation groups. It can be concluded that, the successive changes of the aquatic weeds in the Rosetta branch are frequently results from human activities, because these may change water variables, temperature, clarity and nutrients. |
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