DOI: 10.1111/gcb.12038
论文题名: Driving factors of a vegetation shift from Scots pine to pubescent oak in dry Alpine forests
作者: Rigling A. ; Bigler C. ; Eilmann B. ; Feldmeyer-Christe E. ; Gimmi U. ; Ginzler C. ; Graf U. ; Mayer P. ; Vacchiano G. ; Weber P. ; Wohlgemuth T. ; Zweifel R. ; Dobbertin M.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期: 1 起始页码: 229
结束页码: 240
语种: 英语
英文关键词: Climate change
; Generalized linear models
; Inner-Alpine dry valleys
; Land-use change
; Mixed-effects models
; Pinus sylvestris
; Quercus pubescens
Scopus关键词: abundance
; climate change
; community composition
; drought
; dry forest
; ecosystem modeling
; environmental monitoring
; forest ecosystem
; forest inventory
; land use change
; mortality
; stand structure
; topographic effect
; vegetation dynamics
; article
; climate change
; ecosystem
; oak
; pine
; theoretical model
; tree
; Climate Change
; Ecosystem
; Models, Theoretical
; Pinus
; Quercus
; Trees
; Rhone Valley
; Switzerland
; Valais
; Pinus sylvestris
; Quercus
; Quercus pubescens
英文摘要: An increasing number of studies have reported on forest declines and vegetation shifts triggered by drought. In the Swiss Rhone valley (Valais), one of the driest inner-Alpine regions, the species composition in low elevation forests is changing: The sub-boreal Scots pine (Pinus sylvestris L.) dominating the dry forests is showing high mortality rates. Concurrently the sub-Mediterranean pubescent oak (Quercus pubescens Willd.) has locally increased in abundance. However, it remains unclear whether this local change in species composition is part of a larger-scale vegetation shift. To study variability in mortality and regeneration in these dry forests we analysed data from the Swiss national forest inventory (NFI) on a regular grid between 1983 and 2003, and combined it with annual mortality data from a monitoring site. Pine mortality was found to be highest at low elevation (below 1000 m a.s.l.). Annual variation in pine mortality was correlated with a drought index computed for the summer months prior to observed tree death. A generalized linear mixed-effects model indicated for the NFI data increased pine mortality on dryer sites with high stand competition, particularly for small-diameter trees. Pine regeneration was low in comparison to its occurrence in the overstorey, whereas oak regeneration was comparably abundant. Although both species regenerated well at dry sites, pine regeneration was favoured at cooler sites at higher altitude and oak regeneration was more frequent at warmer sites, indicating a higher adaptation potential of oaks under future warming. Our results thus suggest that an extended shift in species composition is actually occurring in the pine forests in the Valais. The main driving factors are found to be climatic variability, particularly drought, and variability in stand structure and topography. Thus, pine forests at low elevations are developing into oak forests with unknown consequences for these ecosystems and their goods and services. © 2012 Blackwell Publishing Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62559
Appears in Collections: 影响、适应和脆弱性
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作者单位: Swiss Federal Institute for Forest Snow and Landscape Research, Zurcherstrasse 111, CH-8903 Birmensdorf, Switzerland; Institute of Terrestrial Ecosystems, Department of Environmental Systems Science, ETH Zurich, Zurich, CH-8092, Switzerland; Textflow, Talhofweg 5, Winterthur, CH-8408, Switzerland; Departement of Agronomy Sylviculture and Land Management, University of Turin, Italy; University and Research Center Wageningen URL, Netherlands
Recommended Citation:
Rigling A.,Bigler C.,Eilmann B.,et al. Driving factors of a vegetation shift from Scots pine to pubescent oak in dry Alpine forests[J]. Global Change Biology,2013-01-01,19(1)