• Contributors: Bev Law
  • Publication Type: JOUR
  • Authors: Law, B.E., Hudiburg., T.W., Berner, L.T., Kent, J.J., Buotte, P.C., Harmon, M.E.
  • Relevant Sites: US-MRf, US-Wgr

  • Strategies to mitigate carbon dioxide emissions through forestry
    activities have been proposed, but ecosystem process-based integration
    of climate change, enhanced CO2, disturbance from fire,
    and management actions at regional scales are extremely limited.
    Here, we examine the relative merits of afforestation, reforestation,
    management changes, and harvest residue bioenergy use in
    the Pacific Northwest. This region represents some of the highest
    carbon density forests in the world, which can store carbon in
    trees for 800 y or more. Oregon’s net ecosystem carbon balance
    (NECB) was equivalent to 72% of total emissions in 2011–2015. By
    2100, simulations show increased net carbon uptake with little
    change in wildfires. Reforestation, afforestation, lengthened harvest
    cycles on private lands, and restricting harvest on public lands
    increase NECB 56% by 2100, with the latter two actions contributing
    the most. Resultant cobenefits included water availability and
    biodiversity, primarily from increased forest area, age, and species
    diversity. Converting 127,000 ha of irrigated grass crops to native
    forests could decrease irrigation demand by 233 billion m3·y−1.
    Utilizing harvest residues for bioenergy production instead of leaving
    them in forests to decompose increased emissions in the shortterm
    (50 y), reducing mitigation effectiveness. Increasing forest carbon
    on public lands reduced emissions compared with storage in wood
    products because the residence time is more than twice that of wood
    products. Hence, temperate forests with high carbon densities and
    lower vulnerability to mortality have substantial potential for reducing
    forest sector emissions. Our analysis framework provides a template
    for assessments in other temperate regions.

  • Journal: Proceedings of the National Academy of Sciences
  • Volume: 115
  • No: 13
  • Pages: 1 - 6
  • Publication Year: 2018/03/16
  • DOI: 10.1073
  • ISBN: ISSN: 0027-8424
  • http://www.pnas.org/content/early/2018/03/13/1720064115
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