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Primary production and respiration of the phyto plankton in the blue nile and white nile at khartoum sudan






Hydrobiologia 110: 57-60

Primary production and respiration of the phyto plankton in the blue nile and white nile at khartoum sudan

Phytoplankton production and respiration in the Blue Nile and White Nile at Khartoum were measured during the period Nov. 1969-Jan. 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-3 d[day]-1 during the flood season and 2.19 gCm-3d-1 (0.49 mgO2l-1h-1) during Nov. 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 Nov. 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.

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Accession: 006184148



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