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| Titel |
Response of CH4 emissions to moss removal and N addition in boreal peatland of northeast China |
| VerfasserIn |
H. N. Meng, C. C. Song, Y. Q. Miao, R. Mao, X. W. Wang |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 11, no. 17 ; Nr. 11, no. 17 (2014-09-11), S.4809-4816 |
| Datensatznummer |
250117585
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| Publikation (Nr.) |
 copernicus.org/bg-11-4809-2014.pdf |
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| Zusammenfassung |
| Boreal peatlands are an important natural source of atmospheric methane
(CH4). Recently, boreal peatlands have been experiencing increased
nitrogen (N) availability and decreased moss production. However, little is
known about the interactive effect of moss and N availability on CH4
emissions in boreal peatlands. In this study, the effects of moss removal and
N addition (6 g N m−2 yr−1) on CH4 emissions were
examined during the growing seasons of 2011, 2012 and 2013 in a boreal
peatland in the Great Hinggan Mountain of northeast China. Notably, the
response of CH4 emissions to moss removal and N addition varied with
experimental duration. Moss removal and N addition did not affect CH4
emissions in 2011 and 2012, but respectively reduced CH4 emissions by
50% and 66% in 2013. However, moss removal and N addition did not
produce an interactive effect on CH4 emissions. Consequently, moss
removal plus N addition had no effect on CH4 emissions in 2011 and
2012, but decreased CH4 emissions by 68% in 2013. These results
suggest that the effects of moss removal and N enrichment on CH4
emissions are time-dependent in boreal peatlands, and also imply that
increased N availability and decreased moss growth would independently
inhibit CH4 emissions in the boreal peatlands of northeast China. |
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