DOI: 10.1016/j.foreco.2016.12.031
Scopus记录号: 2-s2.0-85008420170
论文题名: Reserve tree mortality in two expanding-gap silvicultural systems 20 years after establishment in the Acadian forest of Maine, USA
作者: Carter D.R. ; Seymour R.S. ; Fraver S. ; Weiskittel A.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 389 起始页码: 149
结束页码: 157
语种: 英语
英文关键词: Expanding-gap
; Femelschlag
; Late-successional
; Retention forestry
; Retention tree
; Windthrow
Scopus关键词: Ecology
; Ecosystems
; Population statistics
; Timber
; Expanding-gap
; Femelschlag
; Late-successional
; Retention forestries
; Retention tree
; Windthrows
; Forestry
; Thuja occidentalis
; Tsuga canadensis
英文摘要: Land managers are increasingly called upon to maintain ecosystem function and restore late-successional forest structures by retaining trees (“reserves”) in harvest prescriptions. Such retention practices often result in mortality of reserve trees owing to increased exposure to wind and ‘gap shock’, thereby compromising management objectives. This study investigated the mortality of reserve trees (n = 787) retained over 20 years in the Acadian Forest Ecosystem Research Project (AFERP), a long-term ecological forestry experiment in central Maine, USA. Cumulative mortality across 18 species was very low (8.4% ± 3.3%, mean ± SD) relative to similar studies throughout the world. Annualized mortality of reserve trees of the two silvicultural systems was 1.1% for the large-gap treatment and 0.4% for the small-gap treatment. Cumulative mortality of Tsuga canadensis was lowest (2%) among species with >50 individuals, while the cumulative mortality of Thuja occidentalis was highest at 19%. Over 59% of cumulative mortality was wind-related. Annualized wind-related mortality of the reserve trees was 0.6% in the large-gap treatment and 0.2% in the small-gap treatment. More vigorous trees showed lower mortality rates. Cumulative mortality and wind-related deaths were somewhat higher in large gaps, and were influenced by spatial position within gaps. The non-traditional, expanding-gap, multi-aged silvicultural systems in this study may explain the lower incidence of windthrow and gap shock experienced by reserve trees relative to the annualized mortality rates from studies of similar, though predominantly single-cohort, silvicultural systems. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64471
Appears in Collections: 影响、适应和脆弱性
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作者单位: School of Forest Resources, University of Maine, 5755 Nutting Hall, Orono, ME, United States
Recommended Citation:
Carter D.R.,Seymour R.S.,Fraver S.,et al. Reserve tree mortality in two expanding-gap silvicultural systems 20 years after establishment in the Acadian forest of Maine, USA[J]. Forest Ecology and Management,2017-01-01,389