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Retention of deposited ammonium and nitrate and its impact on the global forest carbon sink
- Source :
- ISSN: 2041-1723
- 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 15N-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 (201525%) (meanminimummaximum) than ammonium (12816%) while soils retain more ammonium (574965%) than nitrate (463259%). We estimate that the N deposition-induced C sink in forests in the 2010s is 0.720.490.96 Pg C yr−1, higher than previous estimates because of a larger role for oxidized N and greater rates of global N deposition.
Details
- Database :
- OAIster
- Journal :
- ISSN: 2041-1723
- Notes :
- application/pdf, Nature Communications 13 (2022) 1, ISSN: 2041-1723, ISSN: 2041-1723, English
- Publication Type :
- Electronic Resource
- Accession number :
- edsoai.on1323247928
- Document Type :
- Electronic Resource