AQUATIC HYPHOMYCETES ON LEAF-LITTER IN AND NEAR A STREAM IN NOVA-SCOTIA, CANADA

On four dates spread evenly throughout 1991, leaves were collected at six sites near (within 25 m) and in a stream in Nova Scotia, Canada. L oose conidia were recovered by flotation and reproductive potential of aquatic hyphomycetes was estimated by an aeration technique. A total of 33 species with multiradiate or sigmoid spores were found at the fi ve terrestrial sites, and 26 species were recovered from the stream si te. The highest number of species per site occurred on leaves collecte d from the stream, followed by leaves from two locations periodically exposed to flooding and finally by leaves from three sites never cover ed by water. The percentage of leaves that released conidia after aera tion was 89 at terrestrial sites and 100 at the stream site.