چكيده لاتين :
Twenty three aerophytic blue-green algal species were isolated and identified from 5 districts in Cairo,
namely: Nasr City, Abassiya, Downtown, Maadi and Tebbin. Downtown contained the highest mnnbers of total
algal species (13 species) during the study throughout the years 2004-2005 in comparison to other districts. The
composition of aeroalgal taxa varied with seasonal changes. Chroococcus limenticus, Lyngbya lagerheimii,
Phormidium ambigum and Schizothrtx purpurascens have been isolated during the both years 2004-2005, while
the rest of algal species (nineteen species) have been trapped either in 2004 or 2005. Nostoc spp. is the most
common isolate of all algal isolates during the study. Analysis of air pollutants such as SOb NOb suspended
particles less than 10 ).l (PM lO) , black smoke and lead are also recorded. Downtown showed the highest
concentration of SOb N02 and PMlO level during the present study in comparison to other sites. The interaction
between air pollutants and aerophytic Cyanophyceae species was concerned.
