期刊
ENVIRONMENTAL POLLUTION
卷 188, 期 -, 页码 166-171出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2014.02.011
关键词
Nitrogen deposition; N:P ratio; Carbon pool; Moss; Boreal forest
资金
- National Basic Research Program of China on Global Change [2010CB950600]
- National Natural Science Foundation of China [31321061, 31330012]
Global nitrogen (N) deposition has been enhanced with anthropogenic N emissions, and its impacts on mosses are receiving more and more attention. This study investigates how N deposition influence the biomass and stoichiometry of moss Rhytidium rugosum, using a 3-year N enrichment experiment with 0, 2, 5 and 10 g N m(-2) yr(-1) in a boreal forest in Northeast China. Low N additions caused an N redundancy and moderate to high N additions resulted in a biomass loss. N additions reduced biomass ratios of green to brown tissues and increased N and phosphorus (P) contents, suggesting changes in photosynthetic capacity and litter decomposition. Biomass N pools showed a unimodal response to the N additions, and P pools decreased under moderate and high N additions. Our findings indicate significant stoichiometric and biomass changes caused by N deposition may lead to a substantial carbon and nutrient loss in boreal moss carpets. (C) 2014 Elsevier Ltd. All rights reserved.
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