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.
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DOI：
10.1016/j.envpol.2010.11.026
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发表时间：
2011-10
影响因子：
8.9
通讯作者：
C. Stevens;C. Dupré;E. Dorland;C. Gaudnik;D. Gowing;A. Bleeker;M. Diekmann;D. Alard;R. Bobbink;D. Fowler;E. Corcket;J. Mountford;V. Vandvik;P. Aarrestad;S. Muller;N. Dise
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文献类型：
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作者：
C. Stevens;C. Dupré;E. Dorland;C. Gaudnik;D. Gowing;A. Bleeker;M. Diekmann;D. Alard;R. Bobbink;D. Fowler;E. Corcket;J. Mountford;V. Vandvik;P. Aarrestad;S. Muller;N. Dise
对欧洲大西洋海洋地理区域153个酸性草原的调查表明，慢性氮沉降正在改变植物物种组成以及土壤和植物组织化学。在沉积梯度（2-44 kg N ha− 1 yr −1）上，草丰富度占总物种丰富度的比例增加，而杂类草丰富度下降。土壤C：N比增加，但土壤提取态硝态氮和铵态氮浓度没有表现出任何关系与氮沉降。对3种植物的地上部组织氮含量进行了测定：剪股颖（禾草）、岩生猪殃殃（杂草）和鳞叶拟扁穗草（苞片拟扁穗草）。两种维管植物的组织氮含量均与氮沉降量无相关性，但R.氮含量和氮沉降。没有一个物种表现出很强的关系，地上组织N：P或C：N和氮沉降，这表明他们不是很好的沉积速率的指标。
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−1yr−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.