期刊
ENVIRONMENTAL POLLUTION
卷 144, 期 3, 页码 941-950出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2006.01.049
关键词
nitrogen; deposition; concentration; tissue N
资金
- Natural Environment Research Council [ceh010023] Funding Source: researchfish
Tissue N content of mosses, which has been shown to be an indicator of enhanced N, was studied at a range of locations dominated either by wet or dry deposited and oxidised and reduced forms of N. Tissue N responded differently to wet and dry deposited N. For a 1 kg ha(-1) y(-1) increase in N deposition, tissue N increased by 0.01% at wet deposition sites but by 0.03% at sites dominated by dry deposited NH3. Tissue N at wet deposition sites responded more to concentrations of NO3- and NH4+ in precipitation (r(2) 0.63) than to total N deposition (r(2) 0.27), concentration explaining 66% of the variation in tissue N, wet deposition 33%. The study clearly concludes that tissue N concentration in mosses provides a good indication of N deposition at sites where deposition is dominated by NH3, and is also valuable in identifying vegetation exposed to large concentrations of NH4+ or NO3-, in wet deposition dominated areas, such as hilltops and wind exposed woodland edges. (c) 2006 Elsevier Ltd. All rights reserved.
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