DOI: 10.1111/gcb.12994
论文题名: Net aboveground biomass declines of four major forest types with forest ageing and climate change in western Canada's boreal forests
作者: Chen H.Y.H. ; Luo Y.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期: 10 起始页码: 3675
结束页码: 3684
语种: 英语
英文关键词: Aboveground biomass decline
; Boreal forest
; Climate change
; Drought
; Global warming
; Tree mortality
; Water availability
Scopus关键词: aboveground biomass
; boreal forest
; carbon cycle
; climate change
; deciduous forest
; drought
; global warming
; mortality
; net ecosystem production
; water availability
; Alberta
; biomass
; carbon cycle
; climate change
; forest
; Saskatchewan
; season
; time factor
; Alberta
; Biomass
; Carbon Cycle
; Climate Change
; Forests
; Saskatchewan
; Seasons
; Time Factors
英文摘要: Biomass change of the world's forests is critical to the global carbon cycle. Despite storing nearly half of global forest carbon, the boreal biome of diverse forest types and ages is a poorly understood component of the carbon cycle. Using data from 871 permanent plots in the western boreal forest of Canada, we examined net annual aboveground biomass change (ΔAGB) of four major forest types between 1958 and 2011. We found that ΔAGB was higher for deciduous broadleaf (DEC) (1.44 Mg ha-1 year-1, 95% Bayesian confidence interval (CI), 1.22-1.68) and early-successional coniferous forests (ESC) (1.42, CI, 1.30-1.56) than mixed forests (MIX) (0.80, CI, 0.50-1.11) and late-successional coniferous (LSC) forests (0.62, CI, 0.39-0.88). ΔAGB declined with forest age as well as calendar year. After accounting for the effects of forest age, ΔAGB declined by 0.035, 0.021, 0.032 and 0.069 Mg ha-1 year-1 per calendar year in DEC, ESC, MIX and LSC forests, respectively. The ΔAGB declines resulted from increased tree mortality and reduced growth in all forest types except DEC, in which a large biomass loss from mortality was accompanied with a small increase in growth. With every degree of annual temperature increase, ΔAGB decreased by 1.00, 0.20, 0.55 and 1.07 Mg ha-1 year-1 in DEC, ESC, MIX and LSC forests, respectively. With every cm decrease of annual climatic moisture availability, ΔAGB decreased 0.030, 0.045 and 0.17 Mg ha-1 year-1 in ESC, MIX and LSC forests, but changed little in DEC forests. Our results suggest that persistent warming and decreasing water availability have profound negative effects on forest biomass in the boreal forests of western Canada. Furthermore, our results indicate that forest responses to climate change are strongly dependent on forest composition with late-successional coniferous forests being most vulnerable to climate changes in terms of aboveground biomass. © 2015 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61752
Appears in Collections: 影响、适应和脆弱性
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作者单位: Faculty of Natural Resources Management, Lakehead University, 955 Oliver Road, Thunder Bay, ON, Canada
Recommended Citation:
Chen H.Y.H.,Luo Y.. Net aboveground biomass declines of four major forest types with forest ageing and climate change in western Canada's boreal forests[J]. Global Change Biology,2015-01-01,21(10)