DOI: 10.1016/j.foreco.2012.11.042
Scopus记录号: 2-s2.0-84876317644
论文题名: Carbon stocks in managed and unmanaged old-growth western redcedar and western hemlock stands of Canada's inland temperate rainforests
作者: Matsuzaki E. ; Sanborn P. ; Fredeen A.L. ; Shaw C.H. ; Hawkins C.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 297 起始页码: 108
结束页码: 119
语种: 英语
英文关键词: Carbon
; Forest management
; Inland temperate rainforest
; Old-growth
Scopus关键词: Allometric equations
; Coarse woody debris
; Harvesting impacts
; Old-growth
; Old-growth stands
; Silvicultural system
; Temperate rainforest
; Total uncertainties
; Carbon
; Harvesting
; Uncertainty analysis
; Forestry
; clearcutting
; deciduous forest
; forest management
; harvesting
; old-growth forest
; rainforest
; silviculture
; stand structure
; Carbon
; Forest Management
; Forestry
; Harvesting
; British Columbia
; Canada
; Pacific Northwest
; Conium
; Thuja plicata
; Tsuga heterophylla
英文摘要: In the inland temperate rainforests (ITRs) of east-central British Columbia (BC), there is a lack of baseline carbon (C) stocks information for managed and unmanaged stands of old-growth western redcedar and hemlock. To fill the knowledge gap, we estimated C stocks of live trees, snags, coarse woody debris and forest floor (excluding mineral soil) and evaluated impacts of harvesting on these C stocks. We also accounted for heart-rot in stem wood of live cedar and hemlock, and identified uncertainties in live-tree C stocks estimation for more accurate assessment of the C. Forests stands were selected from three previously established silvicultural systems trials that contrasted three levels of harvesting intensity (clear-cut (CC, 0% retention), group retention (GR, 30%), group selection (GS, 70%)), and uncut old-growth (100%). Despite a high incidence of heart-rot, live-tree and total forest (minus mineral soil) C stocks (348±155 and 455±156Mg C ha-1, respectively) in uncut old-growth ITR stands were within the range of regional averages for old-growth forests in the Pacific Northwest (US) and coastal cedar and hemlocks forests of BC. Intensive harvesting (CC and GR) resulted in significant reductions in total forest C stocks (78% and 64%) relative to uncut old-growth stands. By contrast, total forest C stocks in stands where high-retention harvesting (GS) occurred were reduced by only 13% (not significant) relative to uncut old-growth stands. Analysis of uncertainty identified allometric equations to be the largest contributor to total uncertainty in live-tree C stocks, indicating the need to develop more robust equations to reduce the uncertainty for more accurate evaluation of harvesting impacts in old ITRs. Although heart-rot had no significant effects on forest C stocks in this study, we need a better scientific understanding of their contribution to live-tree C in this ecosystem. Nonetheless, these results underscore the importance of conserving C-rich old ITRs where possible and the potential for high-retention harvesting to maintain C stocks in this forest type. © 2012 Crown Copyright and Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66643
Appears in Collections: 影响、适应和脆弱性
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作者单位: Natural Resources and Environmental Studies Graduate Program, University of Northern British Columbia, 3333 University Way, Prince George, BC V2N 4Z9, Canada; Ecosystem Science and Management Program, University of Northern British Columbia, 3333 University Way, Prince George, BC V2N 4Z9, Canada; Natural Resources and Environmental Studies Institute, University of Northern British Columbia, 3333 University Way, Prince George, BC V2N 4Z9, Canada; Natural Resources Canada, Canadian Forest Service, Northern Forestry Centre, 5320 122 St., Edmonton, AB T6H 3S5, Canada; Yukon Research Centre, Yukon College, 500 College Drive, Whitehorse, YT Y1A 5K4, Canada
Recommended Citation:
Matsuzaki E.,Sanborn P.,Fredeen A.L.,et al. Carbon stocks in managed and unmanaged old-growth western redcedar and western hemlock stands of Canada's inland temperate rainforests[J]. Forest Ecology and Management,2013-01-01,297