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Effects of nitrogen with and without acidified sulphur on an ectomycorrhizal community in a Sitka spruce (Picea sitchensis Bong. Carr) forest

Carfrae, J. A.; Skene, K. R.; Sheppard, L. J.; Ingleby, K.; Crossley, A.. 2006 Effects of nitrogen with and without acidified sulphur on an ectomycorrhizal community in a Sitka spruce (Picea sitchensis Bong. Carr) forest. Environmental Pollution, 141 (1). 131-138. 10.1016/j.envpol.2005.08.020

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Abstract/Summary

This preliminary study investigated the effects of enhanced nitrogen (NH4NO3 at 48 kg ha−1 y−1), sulphur (Na2SO4 at 50 kg ha−1y−1), acidified nitrogen and sulphur (H2SO4 + NH4NO3) at pre-stated doses (pH 2.5), and acidified nitrogen and sulphur deposition at double these doses on the ectomycorrhizal community associated with a 13-year-old Sitka spruce (Picea sitchensis) forest. Sulphur deposition had little impact on below ground ectomycorrhizal diversity, but stimulated sporocarp production. Nitrogen inputs increased below ground colonisation compared to acidified nitrogen and sulphur, largely due to an increase in Tylospora fibrillosa colonisation. Sporocarp production and ectomycorrhizal root colonisation by Lactarius rufus were reduced in the nitrogen treated plots. These observations suggest that nitrogen deposition to a young plantation may suppress ectomycorrhizal fungi producing large sporocarps. It is proposed that enhanced nitrogen deposition increases ectomycorrhizal nitrogen assimilation, consuming more carbon and leaving less for extrametrical mycelium and sporocarp development.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1016/j.envpol.2005.08.020
Programmes: CEH Programmes pre-2009 publications > Biogeochemistry
CEH Sections: _ Biosystems Management
_ Atmospheric Sciences
ISSN: 0269-7491
Format Availability: Electronic, Print
Additional Keywords: Carbon allocation, Lactarius rufus, Nitrogen assimilation, Soil chemistry, Tylospora fibrillosa
NORA Subject Terms: Biology and Microbiology
Atmospheric Sciences
Date made live: 02 Jul 2007 16:12
URI: http://nora.nerc.ac.uk/id/eprint/267

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