Nitzschia sp. 1 is the dominant species in the surface sediments, suggesting it has
been present in high concentrations in the plankton for the past few years. Many
Nitzschia species are known to be planktonic (Patrick and Reimer 1966). The shape of
the Nitzschia, long and cylindrical, could be regarded as an adaptation to planktonic
existence (Round et al. 1990). Needle-like Nitzschia are dominant in the plankton of
other East African Lakes, for example in Lake Victoria under stratified conditions (e.g.,
Owen and Crossley 1992), and in Tanganyika and Kivu, making up 20-99% of the
diatoms in the surface-sediment samples (Haberyan and Hecky 1987; Sarmento et al.
2006).
Nitzschia sp. 1 is the dominant species in the surface sediments, suggesting it hasbeen present in high concentrations in the plankton for the past few years. ManyNitzschia species are known to be planktonic (Patrick and Reimer 1966). The shape ofthe Nitzschia, long and cylindrical, could be regarded as an adaptation to planktonicexistence (Round et al. 1990). Needle-like Nitzschia are dominant in the plankton ofother East African Lakes, for example in Lake Victoria under stratified conditions (e.g.,Owen and Crossley 1992), and in Tanganyika and Kivu, making up 20-99% of thediatoms in the surface-sediment samples (Haberyan and Hecky 1987; Sarmento et al.2006).
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