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Stemflow and throughfall mycobiota of a trembling aspen-red alder forest MacKinnon, J. Andrew


The stemflow and throughfall in a red alder-trembling aspen forest were sampled over the course of one year. Samples were preserved, concentrated, and examined microscopically for fungal spores. Recorded on more than ten dates were species of Seimatosporium, Alternaria, Fusarium, Tripospermum, Titaea, and spore types designated Double Crescent Conidium, Didymospore, Ovate Phragmospore, Large Phragmospore, H-Shaped Spore, and Scolecospores; recorded on six to ten dates were Ceratosporium cornutum, species of Flabellospora, Helicoma, Pestalotiopsis, and Scolecobasidium, and the Tapered Helicospore; recorded on two to five dates were Gyoerffyella biappendiculata, Gyoerffyella gemellipara, Clavariopsis aquatica, Triposporina yakuensis, Varicosporium elodeae, species of Ceratosporella, Stauronema, Tetracladium, and Tricladium, and the Dematiaceous T-Shaped Conidium and Tiny Triradiate Conidium; and recorded on one date only were Tetraploa ar istata, Cornutispora 1ichenicola, Dicranidion fragile, Lateriramulosa uni-inflata, a species of Dendrospora, and the Branched Conidium and Dematiaceous Cruciform Conidium. Seasonal sporulation of most fungi was found to be positively correlated with precipitation. A possible role in the forest ecosystem for fungal propagules in stemflow/throughfall is postulated.

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