Biodiversity of fungi on submerged wood in Hong Kong streams

Woody substrates were collected in 5 freshwater streams in Hong Kong and the fungi on these substrates were investigated.A total of 153 species were identified, comprising 61 ascornycete and 92 mitosporic taxa, and 20% were previously undescribed.About 30% of the ascornycetes belonged to the genera Annulatascus (Annulatascaceae), Aniptodera, Savoryella (Halosphaeriaceae), Ophioceras, Pseudohalonectn'a (Magnaporthaceae) and Massarina (Lophiostomataceae).Endophragmiella, Heljcosponum and Sporoschisma were common mitosporic genera.Species overlap occurred between different streams, and a few fungi were common in Hong Kong streams.Species composition in the Tung Chung River was distinct, and factors causing variations are discussed.S a m p h g techniques, the ecological role and distribution of fungi on submerged wood are discussed.