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Elevated aluminium concentration in acidified headwater streams lowers aquatic hyphomycete diversity and impairs leaf-litter breakdown.

Baudoin, Jean-Marc and Guérold, François and Felten, Vincent and Chauvet, Eric and Wagner, Philippe and Rousselle, Philippe Elevated aluminium concentration in acidified headwater streams lowers aquatic hyphomycete diversity and impairs leaf-litter breakdown. (2008) Microbial Ecology, 56 (2). 260-269. ISSN 1432-184X

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Official URL: http://dx.doi.org/10.1007/s00248-007-9344-9

Abstract

Aquatic hyphomycetes play an essential role in the decomposition of allochthonous organic matter which is a fundamental process driving the functioning of forested headwater streams. We studied the effect of anthropogenic acidification on aquatic hyphomycetes associated with decaying leaves of Fagus sylvatica in six forested headwater streams (pH range, 4.3-7.1). Non-metric multidimensional scaling revealed marked differences in aquatic hyphomycete assemblages between acidified and reference streams. We found strong relationships between aquatic hyphomycete richness and mean Al concentration (r = -0.998, p < 0.0001) and mean pH (r = 0.962, p < 0.002), meaning that fungal diversity was severely depleted in acidified streams. By contrast, mean fungal biomass was not related to acidity. Leaf breakdown rate was drastically reduced under acidic conditions raising the issue of whether the functioning of headwater ecosystems could be impaired by a loss of aquatic hyphomycete species.

Item Type:Article
Additional Information:Thanks to Springer editor. The original PDF of the article can be found at Microbial Ecology website : http://link.springer.com/journal/248
HAL Id:hal-00956836
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Université Paul-Verlaine - Metz (FRANCE)
Laboratory name:
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Deposited By: Eric Chauvet
Deposited On:07 Mar 2014 13:11

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