DOI: 10.1007/s10533-016-0278-5
Scopus记录号: 2-s2.0-84996841753
论文题名: Soil organic matter dynamics after afforestation of mountain grasslands in both a Mediterranean and a temperate climate
作者: Ortiz C. ; Vázquez E. ; Rubio A. ; Benito M. ; Schindlbacher A. ; Jandl R. ; Butterbach-Bahl K. ; Díaz-Pinés E.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2016
卷: 131, 期: 3 起始页码: 267
结束页码: 280
语种: 英语
英文关键词: Afforestation
; Carbon cycling
; Coniferous
; Grassland
; Mountain regions
; Soil incubation
Scopus关键词: afforestation
; biotransformation
; carbon isotope
; carbon sequestration
; coniferous forest
; coniferous tree
; grass
; growth
; isotopic composition
; land use change
; Mediterranean environment
; mountain region
; soil organic matter
; temperate environment
; Austria
; Spain
; Coniferophyta
; Picea abies
; Pinus cembra
; Pinus sylvestris
英文摘要: We studied the effect of mountain grassland afforestation with conifer trees (Pinus sylvestris, Picea abies and Pinus cembra) on soil organic matter (SOM) cycling and carbon (C) isotopic composition in two contrasting climate areas using a regional approach. Seventeen paired sites (each containing at least 40 years prior afforested and grassland plots) were investigated in the mountains of Central Spain and Western Austria. Topsoil CO2 effluxes were monitored under standardized conditions for six months as a proxy for soil organic carbon (SOC) mineralisation. The bulk C and nitrogen (N) concentrations and their isotopic composition in the soil and in the plants were assessed. The soil C:N ratio was consistently greater after afforestation in both regions, which in Spain was caused by a significant decrease in N concentration. No consistent effect was found on mineralisation rates due to vegetation change. Afforestation produced a more consistent soil 13C enrichment in the Spanish than in the Austrian sites. Our work strongly suggests that increasing altitude in Mediterranean mountain grasslands alleviates water limitation, favouring both plant growth and SOM decomposition, and ultimately accelerating C cycling. In contrast, temperate grassland areas at high altitudes were associated with severe temperature limitations, which constrained SOM transformation processes. In spite of the impact of afforestation on soil biogeochemical processes, C concentrations were marginally affected. We therefore conclude that grassland conversion to coniferous forests does not enhanced C sequestration in the mineral soil, for at least 40 years after land-use change. © 2016, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83327
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Department of Agricultural Production, Technical University of Madrid, Ciudad Universitaria s/n, Madrid, Spain; Department of Natural Systems and Resources, Technical University of Madrid, Ciudad Universitaria s/n, Madrid, Spain; Department of Forest Ecology and Soils, Federal Research and Training Centre for Forests, Natural Hazards and Landscape - BFW, Seckendorff-Gudent-Weg 8, Vienna, Austria; Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Kreuzeckbahnstrasse 19, Garmisch-Partenkirchen, Germany
Recommended Citation:
Ortiz C.,Vázquez E.,Rubio A.,et al. Soil organic matter dynamics after afforestation of mountain grasslands in both a Mediterranean and a temperate climate[J]. Biogeochemistry,2016-01-01,131(3)