DOI: 10.1016/j.foreco.2016.09.002
Scopus记录号: 2-s2.0-84988027398
论文题名: Disturbance intensity and dominant cover type influence rate of boreal soil carbon change: A Canadian multi-regional analysis
作者: Kishchuk B.E. ; Morris D.M. ; Lorente M. ; Keddy T. ; Sidders D. ; Quideau S. ; Thiffault E. ; Kwiaton M. ; Maynard D.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 381 起始页码: 48
结束页码: 62
语种: 英语
英文关键词: Boreal forest
; Disturbance effects
; Multiple disturbances
; Recovery patterns
; Soil carbon
; Tree species effects
Scopus关键词: Climate change
; Ecology
; Ecosystems
; Floors
; Harvesting
; Lakes
; Regional planning
; Soils
; Boreal forests
; Disturbance effects
; Multiple disturbance
; Soil carbon
; Tree species effects
; Forestry
; anthropogenic effect
; biome
; boreal forest
; carbon sequestration
; carbon sink
; clearcutting
; climate change
; coniferous tree
; deciduous forest
; disturbance
; forest cover
; forest ecosystem
; forest floor
; forest management
; management practice
; soil carbon
; Boreal Shield
; Canada
; Coniferophyta
英文摘要: The circumpolar boreal forest biome contains a significant portion of the global forest carbon (C) stocks, and is generally considered to be a sink for atmospheric C. However, there is a concern that disturbances occurring concurrently with fibre utilization may cause these boreal forest ecosystems to become net C sources resulting from cumulative effects of natural and anthropogenic disturbances, and altered C cycling processes at stand- and landscape scales. In this study, we have synthesized soil C data (forest floor + upper 20 cm of mineral soil) from six long-term, forest management-based manipulative experiments situated in both the Boreal Plain and Boreal Shield ecozones to examine the collective effects of disturbance type and intensity, and dominant tree cover type on soil C pools. The disturbances of clearcut harvest, burn, burn + salvage logging, harvest + forest floor removal resulted in rapid and significant declines in measured soil C following disturbance. In contrast, partial stand removals (i.e., light and heavy thinnings through partial harvest treatments) conducted at the Ecosystem Management Emulating Natural Disturbance (EMEND) trial resulted in slight increases in total measured soil C by year 6, with the exception of conifer dominated stands. The observed declines in total soil C, particularly in the high intensity treatments, were largely a function of declines within the forest floor. In most cases, the rate of change in measured soil C converged over time with baseline levels (clearcut and partial harvests by year 6). In contrast, the data suggests that longer periods of time (>15 years) will be required for the total soil C pool to fully recover to pre-disturbance levels for the higher intensity disturbances. Dominant tree species cover type also influenced the rate of change in total measured soil C. There was a clear difference in the rate of change in the soil C pool between conifer-dominated stands compared to mixed or aspen-dominated stands, going from a positive rate of change (accumulation) under deciduous cover to a negative rate of change under conifers. Our results illustrate that the complex and interactive relationships among species effects, inherent soil and site properties, and management practices should collectively be considered in the development of options related to boreal forest soil C management and climate change mitigation strategies. © 2016 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64676
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: Natural Resources Canada, Canadian Forest Service, Science Program Branch, 580 Booth Street, Ottawa, ON, Canada; Ontario Ministry of Natural Resources and Forestry, Centre for Northern Forest Ecosystem Research, 103-421 James St. S, Thunder Bay, ON, Canada; Centre for Forest Research, P.O. Box 8888Centre-ville Station MontrealQC, Canada; Natural Resources Canada, Canadian Forest Service, Canadian Wood Fibre Centre, 5320 - 122nd Street, Edmonton, AB, Canada; Department of Renewable Resources, University of Alberta, 3-40 Earth Sciences Building, Edmonton, AB, Canada; Centre de recherche sur les matériaux renouvelables, Département des sciences du bois et de la forêt, Université Laval, 2405 rue de la TerrassePavillon Abitibi-PriceUniversité LavalQC, Canada; Natural Resources Canada, Canadian Forest Service, Pacific Forestry Centre, 506 West Burnside Road VictoriaBC, Canada
Recommended Citation:
Kishchuk B.E.,Morris D.M.,Lorente M.,et al. Disturbance intensity and dominant cover type influence rate of boreal soil carbon change: A Canadian multi-regional analysis[J]. Forest Ecology and Management,2016-01-01,381