Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 496-507 |
| Journal | New Phytologist |
| Volume | 191 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2011 |
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Keywords
- global change
- nutritional constraints
- terrestrial ecosystems
- carbon accumulation
- species richness
- ombrotrophic bog
- vascular plants
- n deposition
- water-table
- growth
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Climatic modifiers of the response to nitrogen deposition in peat-forming Sphagnum mosses: a meta-analysis. / Limpens, J.; Granath, G.; Gunnarson, U.; Hoosbeek, M.R.; Heijmans, M.M.P.D.
In: New Phytologist, Vol. 191, No. 2, 2011, p. 496-507.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Climatic modifiers of the response to nitrogen deposition in peat-forming Sphagnum mosses: a meta-analysis
AU - Limpens, J.
AU - Granath, G.
AU - Gunnarson, U.
AU - Hoosbeek, M.R.
AU - Heijmans, M.M.P.D.
PY - 2011
Y1 - 2011
N2 - • 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 increasedannual 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
AB - • 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 increasedannual 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
KW - global change
KW - nutritional constraints
KW - terrestrial ecosystems
KW - carbon accumulation
KW - species richness
KW - ombrotrophic bog
KW - vascular plants
KW - n deposition
KW - water-table
KW - growth
U2 - 10.1111/j.1469-8137.2011.03680.x
DO - 10.1111/j.1469-8137.2011.03680.x
M3 - Article
VL - 191
SP - 496
EP - 507
JO - New Phytologist
JF - New Phytologist
SN - 0028-646X
IS - 2
ER -