DOI: 10.1016/j.foreco.2015.05.019
Scopus记录号: 2-s2.0-84953275986
论文题名: Effects of forest management on productivity and carbon sequestration: A review and hypothesis
作者: Noormets A. ; Epron D. ; Domec J.C. ; McNulty S.G. ; Fox T. ; Sun G. ; King J.S.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2014
卷: 355 起始页码: 124
结束页码: 140
语种: 英语
英文关键词: Belowground allocation
; Carbon management
; Fertilization
; Harvest disturbance
; Soil carbon sequestration
; Trade-offs
Scopus关键词: Budget control
; Classification (of information)
; Climate change
; Ecology
; Economic and social effects
; Ecosystems
; Harvesting
; Lakes
; Photosynthesis
; Phytoplankton
; Plants (botany)
; Soils
; Stabilization
; Wood
; Belowground allocation
; Carbon management
; Fertilization
; Soil carbon sequestration
; Trade off
; Forestry
英文摘要: With an increasing fraction of the world's forests being intensively managed for meeting humanity's need for wood, fiber and ecosystem services, quantitative understanding of the functional changes in these ecosystems in comparison with natural forests is needed. In particular, the role of managed forests as long-term carbon (C) sinks and for mitigating climate change require a detailed assessment of their carbon cycle on different temporal scales. In the current review we assess available data on the structure and function of the world's forests, explore the main differences in the C exchange between managed and unmanaged stands, and explore potential physiological mechanisms behind both observed and expected changes. Two global databases that include classification for management indicate that managed forests are about 50. years younger, include 25% more coniferous stands, and have about 50% lower C stocks than unmanaged forests. The gross primary productivity (GPP) and total net primary productivity (NPP) are the similar, but relatively more of the assimilated carbon is allocated to aboveground pools in managed than in unmanaged forests, whereas allocation to fine roots and rhizosymbionts is lower. This shift in allocation patterns is promoted by increasing plant size, and by increased nutrient availability. Long-term carbon sequestration potential in soils is assessed through the ratio of heterotrophic respiration to total detritus production, which indicates that (i) the forest soils may be losing more carbon on an annual basis than they regain in detritus, and (ii) the deficit appears to be greater in managed forests. While climate change and management factors (esp. fertilization) both contribute to greater carbon accumulation potential in the soil, the harvest-related increase in decomposition affects the C budget over the entire harvest cycle. Although the findings do not preclude the use of forests for climate mitigation, maximizing merchantable productivity may have significant carbon costs for the soil pool. We conclude that optimal management strategies for maximizing multiple benefits from ecosystem services require better understanding of the dynamics of belowground allocation, carbohydrate availability, heterotrophic respiration, and carbon stabilization in the soil. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65671
Appears in Collections: 影响、适应和脆弱性
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作者单位: North Carolina State University, Department of Forestry and Environmental Resources, 920 Main Campus Drive, Suite 300, Raleigh, NC, United States; Université de Lorraine, UMR INRA-UL 1137 Ecologie et Ecophysiologie Forestières, Vandoeuvre-les-Nancy, France; University of Bordeaux, UMR 1220 TCEM ENITA/INRA, 1 Cours du Gal de Gaulle, Gradignan, France; USDA Forest Service, Eastern Forest Environmental Threat Assessment Center, 920 Main Campus Drive, Suite 300, Raleigh, NC, United States; USDA Forest Service, Southeast Regional Climate Hub, 920 Main Campus Drive, Suite 300, Raleigh, NC, United States; Virginia Polytechnic Institute and State University, Department of Forest Resources and Environmental Conservation, 228 Cheatham Hall, Blacksburg, VA, United States
Recommended Citation:
Noormets A.,Epron D.,Domec J.C.,et al. Effects of forest management on productivity and carbon sequestration: A review and hypothesis[J]. Forest Ecology and Management,2014-01-01,355