Abstract
Aquatic hyphomycete communities in the River Teign were sampled simultaneously by membrane filtration of water samples and examination of alder leaf pack baits and randomly collected naturally occurring leaves. The resulting data were compared. Best agreement between species rankings was found for leaf packs and randomly collected leaves; indices of similarity ranged from 71 to 85%. Leaves in packs submerged for 6 weeks had a greater average number of species per leaf, a greater degree of colonization and much less variation in these parameters than randomly collected leaves. Although more species were detected by filtration than by examination of baits and naturally occurring leaves, little agreement was found between number of conidia l−1 and success in colonizing substrata except for Clavatospora longibrachiata and Clavariopsis aquatica. Difficulties were encountered in identifying co-occurring species with similar conidia on filters.
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