DOI: 10.1007/s10533-015-0117-0
Scopus记录号: 2-s2.0-84938293999
论文题名: Dependence of ombrotrophic peat nitrogen on phosphorus and climate
作者: Toberman H. ; Tipping E. ; Boyle J.F. ; Helliwell R.C. ; Lilly A. ; Henrys P.A.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 125, 期: 1 起始页码: 11
结束页码: 20
语种: 英语
英文关键词: Climate
; Nitrogen
; Nitrogen deposition
; Ombrotrophic
; Peat
; Phosphorus
英文摘要: Nitrogen (N) is a key, possibly limiting, nutrient in ombrotrophic peat ecosystems, and enrichment by pollutant N in atmospheric deposition (Ndep , g m−2 a−1) is of concern with regard to peatland damage. We collated data on the N content of surface (depth ≤25 cm, mean 15 cm) ombrotrophic peat (Nsp ) for 215 sites in the UK and 62 other sites around the world, including boreal, temperate and tropical locations (wider global data), and found Nsp to range from 0.5 to 4 %. We examined the dependences of Nsp on surface peat phosphorus (P) content (Psp ), mean annual precipitation (MAP), mean annual temperature (MAT) and Ndep . Linear regression on individual independent variables showed highly significant (p < 0.001) correlations of Nsp with Psp (r2 = 0.23) and MAP (r2 = 0.14), and significant (p < 0.01) but weaker correlations with MAT (r2 = 0.03) and Ndep (r2 = 0.03). A multiple regression model using log-transformed values explained 36 % of the variance of the UK data, 84 % of the variance of the wider global data, and 47 % of the variance of the combined data, all with high significance (p < 0.001). In all three cases, most of the variance was explained by Psp and MAP, but in view of a positive correlation between MAP and MAT for many of the sites, a role for MAT in controlling Nsp cannot be ruled out. There is little evidence for an effect of Ndep on Nsp . The results point to a key role of P in N fixation, and thereby C fixation, in ombrotrophic peats. © 2015, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83486
Appears in Collections: 气候减缓与适应 气候变化事实与影响
There are no files associated with this item.
作者单位: School of Environmental Sciences, University of Liverpool, Liverpool, United Kingdom; Centre for Ecology and Hydrology, Lancaster Environment Centre, Lancaster, United Kingdom; The James Hutton Institute, Craigiebuckler, Aberdeen, United Kingdom
Recommended Citation:
Toberman H.,Tipping E.,Boyle J.F.,et al. Dependence of ombrotrophic peat nitrogen on phosphorus and climate[J]. Biogeochemistry,2015-01-01,125(1)