THE ECOLOGY OF AQUATIC HYPHOMYCETES

Abstract

As a result of the research 35 species of aquatic hyphomycetes, belonging to 21 genera and 4 unindentified taxa of genera Clavariopsis, Dactylella, Helicoon and Tetracladium was observed. For some species substrate preferences were detected. Such species as Anguillospora longissima, Tetracladium marchalianum and Fusarium aqueductum was found at different type of substrata. Only 11 species developed on pine needles while 20 species were observed on leaves. On leaves taken from water habitats 8 species of aquatic hyphomycetes were revealed (Alatospora acuminata, Angullospora aquatica, Lemonniera aquatica, Tetracladium setigerum, Tricladium angulatum, Tripospermum campelopardus, Septonema secedens, Spermospora sp.), whereas in litter 15 species was found. While grew jointly species did not demonstrate inhibitory effect on each other beside. Tripospermum campelopardus which inhibited growth of other species (Table 3). Microcyclic development of Dactylella sp. during the laboratory incubating of leaves was detected for the first time(Fig. 1). Frequency of appearance range and species diversity of aquatic hyphomycetes appeared to' be higer not on skeletinized but on intact leaves (Table 2). Aquatic hyphomycetes seasonal dynamics with two peaks of mass conidia development (vernal and more sharp autumnal) was described. Some species was observed during all the season of vegetation (Table 4). Conidial development in the laboratory incubated leave samples lasted for 30—40 days. So, recomended in literature method of incubation during 7—10 days did not allow to reveal species diversity of aquatic hyphomycetes completely.