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Effects of forest management on productivity and carbon sequestration: A review and hypothesis

Publication ,  Journal Article
Noormets, A; Epron, D; Domec, JC; McNulty, SG; Fox, T; Sun, G; King, JS
Published in: Forest ecology and management
November 2015

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 50years 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.

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Published In

Forest ecology and management

DOI

ISSN

0378-1127

Publication Date

November 2015

Volume

355

Start / End Page

124 / 140

Related Subject Headings

  • Forestry
  • 4102 Ecological applications
  • 3103 Ecology
  • 07 Agricultural and Veterinary Sciences
  • 06 Biological Sciences
  • 05 Environmental Sciences
 

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Noormets, A., Epron, D., Domec, J. C., McNulty, S. G., Fox, T., Sun, G., & King, J. S. (2015). Effects of forest management on productivity and carbon sequestration: A review and hypothesis. Forest Ecology and Management, 355, 124–140. https://doi.org/10.1016/j.foreco.2015.05.019
Noormets, A., D. Epron, J. C. Domec, S. G. McNulty, T. Fox, G. Sun, and J. S. King. “Effects of forest management on productivity and carbon sequestration: A review and hypothesis.” Forest Ecology and Management 355 (November 2015): 124–40. https://doi.org/10.1016/j.foreco.2015.05.019.
Noormets A, Epron D, Domec JC, McNulty SG, Fox T, Sun G, et al. Effects of forest management on productivity and carbon sequestration: A review and hypothesis. Forest ecology and management. 2015 Nov;355:124–40.
Noormets, A., et al. “Effects of forest management on productivity and carbon sequestration: A review and hypothesis.” Forest Ecology and Management, vol. 355, Nov. 2015, pp. 124–40. Epmc, doi:10.1016/j.foreco.2015.05.019.
Noormets A, Epron D, Domec JC, McNulty SG, Fox T, Sun G, King JS. Effects of forest management on productivity and carbon sequestration: A review and hypothesis. Forest ecology and management. 2015 Nov;355:124–140.
Journal cover image

Published In

Forest ecology and management

DOI

ISSN

0378-1127

Publication Date

November 2015

Volume

355

Start / End Page

124 / 140

Related Subject Headings

  • Forestry
  • 4102 Ecological applications
  • 3103 Ecology
  • 07 Agricultural and Veterinary Sciences
  • 06 Biological Sciences
  • 05 Environmental Sciences