DOI: 10.1016/j.foreco.2012.12.033
Scopus记录号: 2-s2.0-84878129069
论文题名: Recent declines of Populus tremuloides in North America linked to climate
作者: Worrall J.J. ; Rehfeldt G.E. ; Hamann A. ; Hogg E.H. ; Marchetti S.B. ; Michaelian M. ; Gray L.K.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 299 起始页码: 35
结束页码: 51
语种: 英语
英文关键词: Climate envelope
; Climatic niche
; Decline
; Die-off
; Dieback
; Drought
Scopus关键词: Climate envelope
; Climatic niche
; Decline
; Die-off
; Dieback
; Drought
; Ecosystems
; Reforestation
; Climate models
; bioclimatology
; caterpillar
; climate change
; deciduous tree
; defoliation
; forest cover
; morality
; niche
; numerical model
; population decline
; population distribution
; precipitation (climatology)
; regeneration
; temperature effect
; thinning
; United States
; Fungi
; Hexapoda
; Malacosoma
; Populus
; Populus tremuloides
英文摘要: Populus tremuloides (trembling aspen) recently experienced extensive crown thinning, branch dieback, and mortality across North America. To investigate the role of climate, we developed a range-wide bioclimate model that characterizes climatic factors controlling distribution of aspen. We also examined indices of moisture stress, insect defoliation and other factors as potential causes of the decline. Historic climate records show that most decline regions experienced exceptionally severe drought preceding the recent episodes. The bioclimate model, driven primarily by maximum summer temperatures and April-September precipitation, shows that decline tended to occur in marginally suitable habitat, and that climatic suitability decreased markedly in the period leading up to decline in almost all decline regions. Other factors, notably multi-year defoliation by tent caterpillars (Malacosoma spp.) and stem damage by fungi and insects, also play a substantial role in decline episodes, and may amplify or prolong the impacts of moisture stress on aspen over large areas. Many severely affected stands have poor regeneration potential, raising concerns that increasing aridity could ultimately lead to widespread loss of aspen forest cover. The analysis indicates that exceptional droughts were a major cause of the decline episodes, especially in the drier regions, and that aspen is sensitive to drought in much of its range. Coupling the bioclimate model with climate projections suggests that we should expect substantial loss of suitable habitat within the current distribution, especially in the USA and Mexico. © 2013. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66614
Appears in Collections: 影响、适应和脆弱性
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作者单位: US Forest Service, Rocky Mountain Region, Gunnison, CO 81230, United States; US Forest Service, Rocky Mountain Research Station, Moscow, ID 83843, United States; University of Alberta, Dept. of Renewable Resources, Edmonton, AB T6G 2H1, Canada; Canadian Forest Service, Northern Forestry Centre, Edmonton, AB T6H 3S5, Canada
Recommended Citation:
Worrall J.J.,Rehfeldt G.E.,Hamann A.,et al. Recent declines of Populus tremuloides in North America linked to climate[J]. Forest Ecology and Management,2013-01-01,299