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Hydrobiologia

, Volume 110, Issue 1, pp 57–59 | Cite as

Primary production and respiration of the phytoplankton in the Blue and White Niles at Khartoum

  • Faisal Sinada
  • A. G. Abdel Karim
Article

Abstract

Phytoplankton production and respiration in the Blue Nile and White Nile at Khartoum were measured during the period November 1969–January 1971 using the light and dark bottle technique. Maximum rates of production coincided with periods of maximum phytoplankton densities. In the Blue Nile gross production varied between 0.00 gCm−3d−1 during the flood season and 2.19 gCm−3d−1 (0.49 mgO2l−1h−1) during November 1969. In the White Nile the range was from 0.41 gCm−3d−1 (0.09 MgO2l−1h−1) in May to 3.74 gCm−3d−1 (0.83 MgO2l−1h−1) in November. The maximum rates of respiration in the Blue Nile and White Nile were 0.10 and 0.63 MgO2l−1h−1 respectively. The ratios net:gross production were generally higher in the White Nile than in the Blue Nile.

Keywords

Sudan algae Blue Nile primary productivity tropical rivers White Nile 

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Copyright information

© Dr W. Junk Publishers 1984

Authors and Affiliations

  • Faisal Sinada
    • 1
  • A. G. Abdel Karim
    • 1
  1. 1.Department of Botany, Faculty of ScienceUniversity of KhartoumSudan

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