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Retention of deposited ammonium and nitrate and its impact on the global forest carbon sink.
- Source :
-
Nature communications [Nat Commun] 2022 Feb 15; Vol. 13 (1), pp. 880. Date of Electronic Publication: 2022 Feb 15. - Publication Year :
- 2022
-
Abstract
- The impacts of enhanced nitrogen (N) deposition on the global forest carbon (C) sink and other ecosystem services may depend on whether N is deposited in reduced (mainly as ammonium) or oxidized forms (mainly as nitrate) and the subsequent fate of each. However, the fates of the two key reactive N forms and their contributions to forest C sinks are unclear. Here, we analyze results from 13 ecosystem-scale paired <superscript>15</superscript> N-labelling experiments in temperate, subtropical, and tropical forests. Results show that total ecosystem N retention is similar for ammonium and nitrate, but plants take up more labelled nitrate ([Formula: see text]%) ([Formula: see text]) than ammonium ([Formula: see text]%) while soils retain more ammonium ([Formula: see text]%) than nitrate ([Formula: see text]%). We estimate that the N deposition-induced C sink in forests in the 2010s  is [Formula: see text] Pg C yr <superscript>-1</superscript> , higher than previous estimates because of a larger role for oxidized N and greater rates of global N deposition.<br /> (© 2022. The Author(s).)
Details
- Language :
- English
- ISSN :
- 2041-1723
- Volume :
- 13
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Nature communications
- Publication Type :
- Academic Journal
- Accession number :
- 35169118
- Full Text :
- https://doi.org/10.1038/s41467-022-28345-1