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Thirty nine different species of fungi were isolated from seedlings of black mangrove Avicennia marina (Forsk.) Vierh growing at Clifton area of Karachi and their habitat, eleven exclusively from seedlings, fifteen from habitat and thirteen common to both sources. Aspergillus was the most diverse genus with six species followed by Penicillium with four species. Deuteromycotina was also the most common and dominant group. The frequency of fungal colonization and species diversity (number of species) both were highest during the south west monsoon season (summer) and negligible during the north east monsoon season (winter), indicating preference for high values of temperature and precipitation by these organisms.
Altogether 53 species of fungi belonging to 21 genera present up to a height of 10m were trapped in the atmosphere of Karachi city. Species of Aspergillus, Alternaria, Penicillium and Cladosporium were the most frequently encountered. A data on the prevalence of atmospheric fungi isolated during 1998-1999 is presented.
