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Effects of whole-stream nutrient enrichment on the concentration and abundance of aquatic hyphomycete conidia in transportAuthor(s): Vol. 96(1): 57-65 Mycologia
Source: Gulis, Vladislav; Suberkropp, Keller
Publication Series: Miscellaneous Publication
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DescriptionThe concentrations and relative abundances of aquatic hyphomycete conidia in water were followed during a three-year study in two headwater streams at Coweeta Hydrologic Laboratory, North Carolina, using the membrane-filtration technique. After a one-ye& pretreatment period, one of the streams was enriched continuously with inorganic nutrients (N+P) for two years while the other stream served as the reference. This ecosystem-level nutrient manipulation resulted in concentrations of aquatic hyphomycete conidia in the water of the treated stream that were 4.5-6.9 times higher than the concentrations observed during the pretreatment period and in the reference stream. Nutrient enrichment led to an increase in the number of fungal species detected on each sampling date. Changes in dominance patterns and relative abundances of individual species also were detected after treatment. Nutrient addition stimulates the reproductive activity of aquatic hyphomycetes, their colonization success and fungal- mediated leaf-litter decomposition. Such changes in the activity of the fungal community might affect higher trophic levels in lotic ecosystems.
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CitationMycologia, Vol. 96(1): 57-65 2004. Effects of whole-stream nutrient enrichment on the concentration and abundance of aquatic hyphomycete conidia in transport. Gulis, Vladislav; Suberkropp, Keller
Keywordscommunity structure, freshwater fungi, nitrogen, phosphorus, seasonal pattern
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- Leaf litter decomposition and microbial activity in nutrient-enriched and unaltered reaches of a headwater stream
- Nutrients stimulate leaf breakdown rates and detritivore biomass: bottom-up effects via heterotrophic pathways.
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