DOI: 10.1002/gbc.20054
Scopus记录号: 2-s2.0-84879046840
论文题名: A leaky model of long-term soil phosphorus dynamics
作者: Boyle J ; F ; , Chiverrell R ; C ; , Norton S ; A ; , Plater A ; J
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2013
卷: 27, 期: 2 起始页码: 516
结束页码: 525
语种: 英语
英文关键词: Holocene
; lake sediment
; model
; Phosphorus
; Quaternary
; soil
Scopus关键词: Holocenes
; Lake sediments
; Last Glacial Maximum
; Quantitative interpretation
; Quaternary
; Soil chronosequence
; Terrestrial ecosystems
; Terrestrial surface
; Dynamics
; Lakes
; Landforms
; Models
; Phosphate minerals
; Phosphorus
; Soils
; apatite
; bedrock
; biogeochemistry
; chronosequence
; concentration (composition)
; deglaciation
; Holocene
; lacustrine deposit
; land surface
; Last Glacial Maximum
; numerical model
; phosphorus
; runoff
; soil nutrient
; terrain
英文摘要: Soil phosphorus (P) leaks rapidly from newly formed land surfaces to upland rivers and lakes, surface water P concentrations peaking early before declining as soil apatite (Ca5(PO4)3(OH)) becomes depleted. We present lake sediment P profiles that record this leakage through the early Holocene. The results are entirely consistent with our re-analysis of published soil chronosequence data, but conflict with more recent quantitative interpretations of global soil P dynamics that identify far slower loss rates. P inherited from the bedrock on soil formation, long regarded as the major source for terrestrial ecosystems, only lasts ~104 years rather than the previously suggested 106 years, and thus is, globally, much less important in the long term than atmospheric supply. This changes the conceptualization of terrestrial P dynamics, with the "terminal steady state" of Walker and Syers (1976) being the norm not the exception, and with soil P export being little if at all controlled by biotic retention mechanisms. High early export of P from newly formed soil causes a peak in the productivity of terrestrial surface waters, before a decline as the soil P pool depletes. Globally, the 18 × 106 km2 of terrain exposed since the Last Glacial Maximum potentially produced a substantial surge in runoff P, with greatest impacts likely in high-latitude, restricted basin seas and maximal area of deglaciated terrain. ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77645
Appears in Collections: 气候变化事实与影响
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作者单位: Geography and Planning, School of Environmental Sciences, University of Liverpool, Myrtle Street, Liverpool L69 7ZT, United Kingdom; Department of Earth Sciences, Climate Change Institute, University of Maine, Orono, ME, United States
Recommended Citation:
Boyle J,F,, Chiverrell R,et al. A leaky model of long-term soil phosphorus dynamics[J]. Global Biogeochemical Cycles,2013-01-01,27(2)