DOI: 10.1016/j.foreco.2015.04.019
Scopus记录号: 2-s2.0-84939417351
论文题名: Long-term changes in belowground and aboveground resource allocation of boreal forest stands
作者: Baret M. ; Pepin S. ; Ward C. ; Pothier D.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2015
卷: 350 起始页码: 62
结束页码: 69
语种: 英语
英文关键词: Boreal forest
; Forest productivity
; Relative resource allocation
; Soil nutrient availability
; Soil respiration
; Stand development
Scopus关键词: Biogeochemistry
; Biological materials
; Nutrients
; Organic compounds
; Productivity
; Resource allocation
; Soils
; Boreal forests
; Forest productivity
; Soil nutrients
; Soil respiration
; Stand development
; Forestry
; biomass
; boreal forest
; carbohydrate
; decomposition
; forest fire
; forestry production
; geoaccumulation
; growth response
; long-term change
; nutrient availability
; old-growth forest
; organic matter
; physiology
; resource allocation
; soil nutrient
; soil respiration
; stand structure
英文摘要: Age-related decline of forest stand growth is a common phenomenon, but the associated physiological causes remain uncertain. This study investigated a possible mechanism that could explain stand growth decline observed after canopy closure. We hypothesised that the proportion of resource allocation to roots increases with stand age as a response to a decrease in nutrient availability, which is related to the long-term accumulation of organic matter in boreal forests. Proxies based on soil respiration measurements and stem biomass production were used to describe temporal changes in the proportion of carbon allocated to belowground and aboveground stand components along a 1067-year post-fire chronosequence. The proportion of resources that were allocated belowground increased in the first 200. years following fire and declined thereafter. The inverse pattern was observed for the organic matter decomposition rate. Stand-level decline in wood productivity that was observed during the first 60-year period after fire can be attributed to a greater proportion of carbohydrates being allocated to roots in response to a decrease in nutrient availability. However, the relatively low productivity of old-growth stands was not associated with high belowground allocation, suggesting that other mechanisms operating at the tree- or stand-level may be involved. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65398
Appears in Collections: 影响、适应和脆弱性
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作者单位: Centre d'étude de la forêt, Département des sciences du bois et de la forêt, Pavillon Abitibi-Price, Université Laval, 2405 rue de la Terrasse, Québec, QC, Canada; Centre de recherche en horticulture, Pavillon de l'Envirotron, Université Laval, Boulevard Hochelaga, Canada
Recommended Citation:
Baret M.,Pepin S.,Ward C.,et al. Long-term changes in belowground and aboveground resource allocation of boreal forest stands[J]. Forest Ecology and Management,2015-01-01,350