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Studies on the freshwater algae of the Sudan III, vertical distribution of Melosira granulata (Ehren.) Ralfs. in the White Nile, with reference to certain environmental variables

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Abstract

The variations in the number of Melosira granulata in the vertical column of the White Nile was followed for 18 months during the years 1969–71, together with diurnal changes. The monthly as well as the diurnal fluctuations in the levels of certain physical and chemical parameters were simultaneously considered. The counts indicated noticeable progressive decreases from surface to the bottom of the river. Pronounced stratification of the alga was evident during certain months but without apparent correlation with any of the factors analysed.

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Author notes

  1. O. M. Saeed

    Present address: Fisheries and Hydrobiological Research Section, Ministry of Agriculture, Food and Natural Resources, Khartoum, Sudan

Authors and Affiliations

  1. Department of Botany, University of Khartoum, Khartoum, Sudan

    A. G. Abdel Karim & O. M. Saeed

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  1. A. G. Abdel Karim
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  2. O. M. Saeed
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Abdel Karim, A.G., Saeed, O.M. Studies on the freshwater algae of the Sudan III, vertical distribution of Melosira granulata (Ehren.) Ralfs. in the White Nile, with reference to certain environmental variables. Hydrobiologia 57, 73–79 (1978). https://doi.org/10.1007/BF00018631

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  • DOI: https://doi.org/10.1007/BF00018631

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