Comparison of Three Techniques for the Study of Aquatic Hyphomycete Communities

Shearer, Carol A.; Lane, L. C.

doi:10.2307/3792691

Cited by 46 publications

(17 citation statements)

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“…Combining enzymes from several species might therefore have a synergistic effect on leaf decay rates. The predominance of cooperative (or at least neutral) interactions between aquatic hyphomycetes is also suggested by extensive intermingling of hyphae from several species on leaves decaying in streams (Shearer and Lane 1983). On the other hand, most interspecific interactions on artificial media resulted in inhibition of one or both members of a pair (Shearer and Zare-Maivan 1988).…”

Section: Discussionmentioning

confidence: 98%

Aquatic hyphomycete diversity and identity affect leaf litter decomposition in microcosms

et al. 2006

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We conducted a microcosm experiment with monocultures and all possible combinations of four aquatic hyphomycete species, Articulospora tetracladia, Flagellospora curta, Geniculospora grandis and Heliscus submersus, to examine the potential effects of species richness on three functional aspects: leaf litter decomposition (leaf mass loss), fungal production (ergosterol buildup) and reproductive effort (released spores). Both species richness and identity significantly affected fungal biomass and conidial production (number and biomass of released spores), whereas only species identity had a significant effect on leaf mass loss. In mixed cultures, all measures of fungal functions were greater than expected from the weighted performances of participating species in monoculture. Mixed cultures outperformed the most active monoculture for biomass accumulation but not for leaf mass loss and conidial production. The three examined aspects of aquatic hyphomycete activity tended to increase with species richness, and a complementary effect was unequivocally demonstrated for fungal biomass. Our results also suggest that specific traits of certain species may have a greater influence on ecosystem functioning than species number.

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Section: Discussionmentioning

confidence: 98%

Aquatic hyphomycete diversity and identity affect leaf litter decomposition in microcosms

et al. 2006

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“…In aquatic hyphomycetes, there is extensive intermingling of colonies belonging to different species on leaves (Bärlocher and Kendrick 1974;Suberkropp and Klug 1976;Shearer and Lane 1983), suggesting limited interference. This idea has been confi rmed with pure cultures: hyphal interference, the release of inhibitory substances, and invasion of a colony by the same or by other species is rare (Khan 1987;Bärlocher 1991).…”

Section: The Boom-bust Cycle Of Aquatic Hyphomycetesmentioning

confidence: 98%

Reproduction and dispersal in aquatic hyphomycetes

Bärlocher

2009

Mycoscience

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“…However, the patches used in the experiment did not include overlapping mycelia of several fungal species together such as might occur naturally in streams (Shearer & Lane, 1983;Chamier et al, 1984). It is not known whether the patches on a leaf or the leaves colonized by multiple fungal species have different effects on the feeding preferences or the growth of shredders when compared with the patches or leaves colonized by single fungal species (Suberkropp, 2003).…”

Section: Introductionmentioning

confidence: 98%

“…However, the aquatic hyphomycete community on a leaf naturally found in a stream habitat typically includes multiple fungal species (Shearer & Lane, 1983). Some species are dominant over the whole leaf area, whereas others are found in limited areas.…”

Section: Introductionmentioning

confidence: 99%

“…Some species are dominant over the whole leaf area, whereas others are found in limited areas. Considering that any given small area on a leaf submerged in a stream consists of a complicated network of overlapping colonies of multiple aquatic hyphomycetes (Shearer & Lane, 1983;Chamier et al, 1984) and that each fungal species may differ in colonization period which might result in various stages of degradation, leaf detritus naturally occurring in streams likely represents spatially heterogeneous mosaics of fungal patches whose palatability varies among patches . This suggests that each fungal-colonized area within an individual leaf might be detected as a resource unit by shredders Arsuffi & Suberkropp, 1985).…”

Section: Introductionmentioning

confidence: 99%

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Effects of aquatic fungi on feeding preferences and bioenergetics of Pycnopsyche gentilis (Trichoptera: Limnephilidae)

Chung

Suberkropp

2009

Hydrobiologia

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Previous studies which have tested the feeding preferences of shredders for fungal species and the food quality of fungi used detritus uniformly colonized by a fungus, which is not the case for decaying leaves in streams. It is not known whether shredders in different development stages exhibit variations in feeding preference and larval performance. This study examined the feeding preferences and the growth of the third and the fifth instars of Pycnopsyche gentilis larvae using fungal-colonized patches and whole leaves, respectively, having different fungal species compositions (Alatospora acuminata, Anguillospora filiformis, Articulospora tetracladia, Tetrachaetum elegans, and all species combined). The aquatic hyphomycetes used were codominant on leaves in the stream inhabited by the caddisfly. During 14 d of feeding, the larvae of both instars did not show significant differences in feeding preferences for the patches growing on oak leaves, although the third instar larvae were slightly more selective than the fifth instar larvae. When fed with maple leaves for 18 d, larval growth rates, gross growth efficiencies, and survivorship were not significantly different among the fungal treatments. However, the larval growth of both instars fed with fungal-colonized leaves was always significantly greater than the growth of larvae fed with diets of uncolonized leaves. The third instar larvae grew faster than the fifth instar larvae, but the growth efficiencies of the two instars were similar. These results suggest that P. gentilis larvae exhibit less selectivity in their feeding than other caddisfly shredders that have been examined and that the dominant fungi colonizing leaves in their habitat are similar in palatability and food quality for this shredder.

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Comparison of Three Techniques for the Study of Aquatic Hyphomycete Communities

Cited by 46 publications

References 0 publications

Aquatic hyphomycete diversity and identity affect leaf litter decomposition in microcosms

Aquatic hyphomycete diversity and identity affect leaf litter decomposition in microcosms

Reproduction and dispersal in aquatic hyphomycetes

Effects of aquatic fungi on feeding preferences and bioenergetics of Pycnopsyche gentilis (Trichoptera: Limnephilidae)

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