B. Papp szerk.: Studia Botanica Hungarica 29. 1998 (Budapest, 1999)

Gönczöl, János; Révay, Ágnes: Aquatic Hyphomycetes in a tributary of the Morgó stream, Börzsöny Mts, NE Hungary

Table 3 (continued) Species Apr. Jun. Aug. Oct. Dec. Jan. Tetracladium marchalianum de Wild. 0.68 0.11 0.37 2.08 0.96 0.27 Tetracladium maxilliforme (Rostrup) Ingold 0.05 0.02 Tetracladium setigerum (Grove) Ingold 0.05 0.07 Tricellula aquatica Webster 0.01 Trichocladium angelicum Roldán et Honrubia 0.11 1.47 0.16 0.02 0.80 Tricladium angulatum Ingold 7.29 0.48 0.18 10.93 13.32 0.27 Tricladium sp. 0.10 0.05 Tricladium splendens Ingold 0.27 Triscelophorusmonosporus Ingold 0.11 0.05 Triscelophorus sp. 0.16 0.05 0.03 Tumularia aquatica (Ingold) Descals et Marvanová 1.14 2.20 0.57 0.02 2.14 Tumularia tuberculata (Gönczöl) Descals et 0.62 0.16 0.26 Marvanová Vargamyces aquaticus (Dudka) Tóth 0.21 0.43 2.38 0.26 2.41 Unidentified 1.03 0.51 Sigmoid 1 0.52 Sigmoid 2 2.01 Number of conidia/1 3844 3716 1092 3840 23688 748 Number of species 25 22 20 34 32 23 between Site II and Site Cs is due to the exceptionally high conidial concentrations of Alatospora acuminata s.l. (Table 4). DISCUSSION Because of the spatial closeness of the Csömöle stream and downstream portion of the Morgó stream, predictable conidial communities were expected during this study. In spite of this expectation between the conidial communities at the Site Cs and the sites along the Morgó stream very low similarities were detected. The strikingly high proportion of the scolecoconidia, the absence or very low proportion of conidia of some species predominantly occurring in conidial populations of the Morgó stream, and finally the substantial occurrence of conidia of aquatic hyphomycete species not detected so far in the Morgó stream were the major distinctive characteristics of aquatic hyphomycete communities in the Csömöle stream.