STEVENS, Carly J.; DUPRE, Cecilia; DORLAND, Edu; GAUDNIK, Cassandre; GOWING, David J.G.; BLEEKER, Albert; DIEKMANN, Martin; ALARD, Didier; BOBBINK, Roland; FOWLER, David; CORCKET, Emmanuel; MOUNTFORD, J. Owen; VANDVIK, Vigdis; AARRESTAD, Per Arild; MULLER, Serge; DISE, Nancy B.

doi:10.1016/j.envpol.2010.11.026

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STEVENS, Carly J.
Open University
Lancaster Environment Centre

DUPRE, Cecilia
Universität Bremen [Deutschland] = University of Bremen [Germany] = Université de Brême [Allemagne]

DORLAND, Edu
Universiteit Utrecht / Utrecht University [Utrecht]

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Article de revue

Ce document a été publié dans

Environmental Pollution. 2011, vol. 159, n° 10, p. 2243-2250

Elsevier

Résumé en anglais

A survey of 153 acid grasslands from the Atlantic biogeographic region of Europe indicates that chronic nitrogen deposition is changing plant species composition and soil and plant-tissue chemistry. Across the deposition gradient (2–44 kg N ha−1 yr−1) grass richness as a proportion of total species richness increased whereas forb richness decreased. Soil C:N ratio increased, but soil extractable nitrate and ammonium concentrations did not show any relationship with nitrogen deposition. The above-ground tissue nitrogen contents of three plant species were examined: Agrostis capillaris (grass), Galium saxatile (forb) and Rhytidiadelphus squarrosus (bryophyte). The tissue nitrogen content of neither vascular plant species showed any relationship with nitrogen deposition, but there was a weak positive relationship between R. squarrosus nitrogen content and nitrogen deposition. None of the species showed strong relationships between above-ground tissue N:P or C:N and nitrogen deposition, indicating that they are not good indicators of deposition rate.< Réduire

Mots clés

ATMOSPHERIC NITROGEN DEPOSITION

PLANT-TISSUE NITROGEN

SOIL C:N

SOIL PH

PRAIRIE ACIDE

DÉPÔT D'AZOTE

RICHESSE DES ESPÈCES

Mots clés en anglais

AGROSTIS CAPILLARIS

GALIUM SAXATILE

RHYTIDIADELPHUS SQUARROSUS

PLANT FUNCTIONAL GROUP

AGROSTIDE