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Disturbance Regimes and Stressors

  • Matthew P. AyresEmail author
  • Jeffrey A. Hicke
  • Becky K. Kerns
  • Don McKenzie
  • Jeremy S. Littell
  • Lawrence E. Band
  • Charles H. Luce
  • Aaron S. Weed
  • Crystal L. Raymond
Chapter
Part of the Advances in Global Change Research book series (AGLO, volume 57)

Abstract

The effects of climate change on insect outbreaks, wildfire, invasive species, and pathogens in forest ecosystems will greatly exceed the effects of warmer temperature on gradual changes in forest processes. Increased frequency and extent of these disturbances will lead to rapid changes in vegetation age and structure, plant species composition, productivity, carbon storage, and water yield. Insect outbreaks are the most pervasive forest disturbance in the United States, and rapid spread of bark beetles in the western United States has been attributed to a recent increase in temperature. Wildfire area burned has increased in recent decades, although frequency and severity have not changed, and is expected to greatly increase by 2050 (at least twice as much area burned annually in the West). More frequent occurrence of fire and insects will create landscapes in which regeneration of vegetation will occur in a warmer environment, possibly with new species assemblages, younger age classes, and altered forest structure. Increased fire and insects may in turn cause more erosion and landslides. Invasive plant species are already a component of all forest ecosystems, and a warmer climate will likely facilitate the spread of current and new invasives, particularly annuals that compete effectively in an environment with higher temperature and frequent disturbance. The interaction of multiple disturbances and stressors, or stress complexes, has the potential to alter the structure and function of forest ecosystems, especially when considered in the context of human land-use change. Occurring across large landscapes over time, these stress complexes will have mostly negative effects on ecosystem services, requiring costly responses to mitigate them and active management of forest ecosystems to enhance resilience.

Keywords

Forest Ecosystem Invasive Plant Bark Beetle Fire Regime Fire Risk 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media Dordrecht (outside the USA) 2014

Authors and Affiliations

  • Matthew P. Ayres
    • 1
    Email author
  • Jeffrey A. Hicke
    • 2
  • Becky K. Kerns
    • 3
  • Don McKenzie
    • 4
  • Jeremy S. Littell
    • 5
  • Lawrence E. Band
    • 6
  • Charles H. Luce
    • 7
  • Aaron S. Weed
    • 1
  • Crystal L. Raymond
    • 8
  1. 1.Department of Biological SciencesDartmouth CollegeHanoverUSA
  2. 2.Department of GeographyUniversity of IdahoMoscowUSA
  3. 3.Pacific Northwest Research StationU.S. Forest ServiceCorvallisUSA
  4. 4.Pacific Northwest Research StationU.S. Forest ServiceSeattleUSA
  5. 5.Alaska Climate Science CenterU.S. Geological SurveyAnchorageUSA
  6. 6.Department of GeographyUniversity of North CarolinaChapel HillUSA
  7. 7.Rocky Mountain Research StationU.S. Forest ServiceBoiseUSA
  8. 8.Seattle City LightSeattleUSA

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