Apr 21, 2005

Fungal diversity during initial stages of leaf decomposition in a stream

Mycological Research
L G NikolchevaFelix Bärlocher


Maple, linden and oak leaves were immersed in a stream for 1-21 d. Cumulative mass loss, ergosterol content, and species richness of released aquatic hyphomycete conidia increased with time. Numbers and richness of attached conidia were highest on days 1 and 2. Denaturing gradient gel electrophoresis revealed up to seven fungal phylotypes on the leaves before their immersion in the stream and after one day of stream exposure. After 5 d of immersion the contribution of these terrestrial fungi decreased and that of aquatic hyphomycetes increased. The dominant phylotypes belonged to Anguillispora filiformis, Articulospora tetracladia and Flagellospora curvula, which also dominated the community of released spores. The molecular diversity was highest on day 2 and 3 on all substrates. This may be due to a few species of terrestrial fungi, later outcompeted by aquatic hyphomycetes, and to many different conidia of aquatic hyphomycetes, some of which may germinate but are unable to establish themselves and reproduce.

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Mentioned in this Paper

Reproduction Spores
Reactive Attachment Disorder
Flagellospora curvula
Biotyping, Mycological

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