COMPARATIVE STUDY ON THE PLANT LIFE OF TWO MEDITERRANEAN DELTAIC LAKES IN EGYPT دراسة مقارنة على حياة النبات فى اثنين من بحيرات الدلتا - مصر المطلة على ساحل البحر األبيض المتوسط | ||||
Assiut University Bulletin for Environmental Researches | ||||
Article 1, Volume 2.1, Issue 1, March 1999, Page 1-14 PDF (202.6 K) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/auber.1999.141826 | ||||
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Abstract | ||||
ABSTRACT : The terrestrial and aquatic flora of the two largest natural lakes of Egypt (Lake Manzala and Lake Burollos) were studied. Lake Manzala is located on the eastern side of Damietta branch of the Nile, whereas, Lake Burollos lies on the eastern side of Rosetta branch of the Nile, occupying the central position along the Mediterranean coast of the Nile delta . Despite the two times larger area of Lake Manzala compared with Lake Burollos and physiographic similarity, Lake Burollos is floristically rich (135 species, 41 families) as compared with Lake Manzala (102 species, 36 families). Both lakes have many floristic differences. Lake Burollos is characterized with lower number of euhydrophytes (7 species) compared to 16 species recorded in Lake Manzala. The highest number of species are belonging to Gramineae and Chenopodiaceae, respectively in both lakes. The life form spectrum of both lakes showed that therophytes are highly represented followed by geophytes . The islands in both lakes are floristically rich. However, islands of Lake Burollos seem to be suitable habitat for some plant species absent from the islands of Lake Manzala e.g. Lycium schweinfurthii, Pancratium maritimum, Allium roseum, Silene succulenta, Asparagus stipularis and several annuals, some plant species recorded in one site in Lake Burollos, are considered as rare species such as Ipomoea imperati and Limonium narbonense which are threatened and need protection . In the present paper, the authors compared the floristic composition of the different habitats of both lakes. لقد تم فى ھذا البحث دراسة الفلورا األرضية والمائية لکل من بحيرة المنزلة وبحيرة البرولس واللتان تطل على ساحل البحر األبيض المتوسط حيث تقع بحيرة المنزلة على الجانب الشرقى لفرع دمياط من نھر النيل ، بينما تقع بحيرة البرولس على الجانب الشرقى لفرع رشيد من نھر النيل . ولقد وجد أن بحيرة البرولس غنية بالنباتات (١٣٥ نوع ، ٤١ عائلة نباتية ) بالمقارنة لبحيرة المنزلة ( ١٠٢ نوع ، ٣٦ عائلة نباتية ) کذلک تتميز بحيرة البرولس بوجود عدد قليل من النباتات ً المائية الحقيقية ( ٧ أنواع ) أما بحيرة المنزلة فيوجد بھا عدد أکبر ( ١٦ ) وغالبية ھذه النباتات نوعا المائية تنتسب إلى العائلة النجيلية والعائلة الکينوبودية . ھذا وتمثل الجزر فى کل من ھاتين البحيرتين مناطق غنية بالنباتات ، ولکن مع تباين فى األنواع يتباين الجزر والبحيرة . من أمثلة ھذه النباتات والتى توجد فى بحيرة البرولس ھى : ,Lycium schweinfurthii, Pancratium maritimum وبعض Allium roseum, Silene succulenta, Asparagus stipularis and several annuals الحوليات ومنھا ما ھو نادر مثل : Ipomoea imperati and Limonium narbonense وھذه النباتات مھددة باإلنقراض لذلک وجبت المحافظة عليھا . . ً ً معينا وإنتھت الدراسة إلى عمل مقارنة بين فلورا کل من البحيرتين ألن کل منھما يمثل نظاما ً بيئيا | ||||
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References | ||||
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