Climatic modifiers of the response to nitrogen deposition in peat-forming Sphagnum mosses a meta-analysis

Climatic modifiers of the response to nitrogen deposition in peat-forming Sphagnum mosses : a meta-analysis

© 2011 The Authors. New Phytologist © 2011 New Phytologist Trust.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 191(2011), 2 vom: 08. Juli, Seite 496-507
1. Verfasser: Limpens, J (VerfasserIn)
Weitere Verfasser: Granath, G, Gunnarsson, U, Aerts, R, Bayley, S, Bragazza, L, Bubier, J, Buttler, A, van den Berg, L J L, Francez, A-J, Gerdol, R, Grosvernier, P, Heijmans, M M P D, Hoosbeek, M R, Hotes, S, Ilomets, M, Leith, I, Mitchell, E A D, Moore, T, Nilsson, M B, Nordbakken, J-F, Rochefort, L, Rydin, H, Sheppard, L J, Thormann, M, Wiedermann, M M, Williams, B L, Xu, B
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2011
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Meta-Analysis Soil Nitrogen N762921K75
Beschreibung
Zusammenfassung:© 2011 The Authors. New Phytologist © 2011 New Phytologist Trust.
Peatlands in the northern hemisphere have accumulated more atmospheric carbon (C) during the Holocene than any other terrestrial ecosystem, making peatlands long-term C sinks of global importance. Projected increases in nitrogen (N) deposition and temperature make future accumulation rates uncertain. Here, we assessed the impact of N deposition on peatland C sequestration potential by investigating the effects of experimental N addition on Sphagnum moss. We employed meta-regressions to the results of 107 field experiments, accounting for sampling dependence in the data. We found that high N loading (comprising N application rate, experiment duration, background N deposition) depressed Sphagnum production relative to untreated controls. The interactive effects of presence of competitive vascular plants and high tissue N concentrations indicated intensified biotic interactions and altered nutrient stochiometry as mechanisms underlying the detrimental N effects. Importantly, a higher summer temperature (mean for July) and increased annual precipitation intensified the negative effects of N. The temperature effect was comparable to an experimental application of almost 4 g N m(-2)  yr(-1) for each 1°C increase. Our results indicate that current rates of N deposition in a warmer environment will strongly inhibit C sequestration by Sphagnum-dominated vegetation
Beschreibung:Date Completed 28.03.2013
Date Revised 23.04.2021
published: Print-Electronic
CommentIn: New Phytol. 2011 Jul;191(2):309-11. - PMID 21714789
Citation Status MEDLINE
ISSN:1469-8137
DOI:10.1111/j.1469-8137.2011.03680.x