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Response of aquatic hyphomycete communities to enhanced stream retention in areas impacted by commercial forestry

Laitung, Beryl and Pretty, James L. and Chauvet, Eric and Dobson, Mike Response of aquatic hyphomycete communities to enhanced stream retention in areas impacted by commercial forestry. (2002) Freshwater Biology, 47 (2). 313-323. ISSN 0046-5070

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Official URL: http://doi.wiley.com/10.1046/j.1365-2427.2002.00801.x

Abstract

1. Aquatic hyphomycetes are an important component of detritus processing in streams. Their response to enhanced stream retentiveness was tested by manipulating three streams located in Kielder Forest (northern England), a large plantation of exotic conifers, and two streams in Montagne Noire (south-west France) dominated by native broadleaf woodland. Treatment was by placement of logs or plastic litter traps into a 10–20 m stream section. Fungal spores were collected from stream water upstream and downstream of the treated sections over 1–2 years. 2.The average concentration of fungal spores in reference sections was nearly 10x greater in the French streams than in the English streams. The number of hyphomycete species was also higher in the French streams. These differences between regions were probably a consequence of the much lower standing stock and diversity of leaf litter in the English streams. 3. Despite these large regional differences, the treatment had a clear effect in all streams. Detrital standing stocks were enhanced in treated sections by up to 90% in French streams and 70% in English streams. 4. Mean spore density below treated sections increased by 1.8–14.8% in French streams and 10.2–28.9% in the naturally less retentive English streams. The number of fungal species increased significantly below the treated sections of the English streams, although not the French ones. 5. In biologically impoverished plantation streams, input of woody debris can increase detritus retention and enhance hyphomycete diversity and productivity. This may have consequent benefits for detritus processing and macroinvertebrate production.

Item Type:Article
Additional Information:Thanks to Blackwell Publishing editor. The original PDF of the article can be found at Freshwater Biology website : http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-2427
HAL Id:hal-00941110
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Manchester Metropolitan University - MMU (UNITED KINGDOM)
Other partners > Queen Mary University of London - QMUL (UNITED KINGDOM)
Laboratory name:
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Deposited By: Eric Chauvet
Deposited On:03 Feb 2014 12:53

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