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The impact of nitrogen deposition on acid grasslands in the Atlantic region of Europe

The impact of nitrogen deposition on acid grasslands in the Atlantic region of Europe,10.1016/j.envpol.2010.11.026,Environmental Pollution,Carly J. St

The impact of nitrogen deposition on acid grasslands in the Atlantic region of Europe  
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Carly J. Stevens, Cecilia Duprè, Edu Dorland, Cassandre Gaudnik, David J. G. Gowing, Albert Bleeker, Martin Diekmann, Didier Alard, Roland Bobbink, David Fowler, Emmanuel Corcket, J. Owen Mountfordhttp://academic.research.microsoft.com/io.ashx?type=5&id=49271292&selfId1=0&selfId2=0&maxNumber=12&query=
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.
Journal: Environmental Pollution - ENVIRON POLLUT , vol. 159, no. 10, pp. 2243-2250, 2011
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