Fungus Spores in East African Lake Sediments. V

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Abstract
The kinds of fungus spores and their abundance at different depths in the sediment of Lake Rukwa, a Tanzanian rift lake, are considered. Spores were much less plentiful in the sediment of this lake than in sediments of Bujuku and Mahoma, 2 montane lakes previously examined. The vegetation consisting of bush and interspersed grasses, of the region surrounding Lake Rukwa, has become stablized. The establishment and persistence of this type of vegetation could have resulted from the interaction of at least 4 factors repeated burning of the vegetation, year after year for a long time; volcanism; extensive periods of drought; and grazing pressure. Each of these factors could have interfered not only with plant succession but each could have modified seriously the growth and survival of fungi and consequently could account for the paucity of spores at all depths in the sediment.

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