DOI: 10.1016/j.foreco.2017.06.015
Scopus记录号: 2-s2.0-85021087985
论文题名: Population dynamics and the influence of blight on American chestnut at its northern range limit: Lessons for conservation
作者: Van Drunen S.G. ; Schutten K. ; Bowen C. ; Boland G.J. ; Husband B.C.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 400 起始页码: 375
结束页码: 383
语种: 英语
英文关键词: Castanea dentata
; Cryphonectria parasitica
; Geographic range
; Mortality
; Population viability
; Reproduction
Scopus关键词: Conservation
; Fruits
; Population dynamics
; Population statistics
; Surveys
; Castanea dentata
; Cryphonectria
; Geographic ranges
; Mortality
; Population viability
; Reproduction
; Forestry
; Castanea dentata
; Cryphonectria parasitica
英文摘要: Species of conservation concern may require special management consideration at their range limits where population vulnerability can be exaggerated by environmental stress. American chestnut, dramatically affected by chestnut blight in the early 1900s, has received extensive conservation attention especially in the central (U.S.) portion of its native range. However, relatively little is known about the population dynamics and the demographic effects of blight at the northern edge of its range, in Canada. Here we measure changes in tree size, reproduction, blight symptoms, and survival since a survey in 2001–02 and estimate the effect of chestnut blight on vital rates and population growth rates using a projection matrix model. Currently, chestnut trees in Canada range from <2 to 77.8 cm DBH. The incidence of reproductive trees (11%) decreased while frequency of blight (36%) and dieback (37%) increased since the 2001–02 survey. Mortality was 21.3% overall (41% for trees with blight) with few trees producing viable nuts or having established recruits (0.014 recruits per tree). Chestnut in Canada is in decline (λ = 0.817), but tends to differ in blight incidence, tree size, and reproduction compared to surveys in the central part of the range. Efforts to elevate recruitment may be necessary to mitigate extirpation in the northern population. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64225
Appears in Collections: 影响、适应和脆弱性
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作者单位: School of Environmental Sciences, University of Guelph, 50 Stone Road East, Guelph, Ontario, Canada; Department of Integrative Biology, University of Guelph, 50 Stone Road East, Guelph, Ontario, Canada
Recommended Citation:
Van Drunen S.G.,Schutten K.,Bowen C.,et al. Population dynamics and the influence of blight on American chestnut at its northern range limit: Lessons for conservation[J]. Forest Ecology and Management,2017-01-01,400