EPSCoR - Alaska Adapting to Changing Environments

EPSCoR - Alaska Adapting to Changing Environments

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The role of windstorm exposure and yellow cedar decline on landslide susceptibility in southeast Alaskan temperate rainforests

Interactions between ecological disturbances have the potential to alter other disturbances and their associated regimes, such as the likelihood, severity, and extent of events. The influence of exposure to wind and yellow cedar decline on the landslide regime of Alaskan temperate rainforests was explored using presence-only modeling techniques. The wind regime was found to be a significant influence on the spatial distribution of landslide events. This effect was mediated by slope, with little interactive effects at low angles and stronger influences on steeper slopes. Mechanistically, the interaction appears to be mediated by root strength, which is an important factor in stability of high-angle slopes. Yellow cedar decline, despite increasing landslide susceptibility in fine-scale studies, was not significant—although a stronger relationship may develop with time. Overall, inclusion of other disturbances in the modeling framework resulted in a significant spatial refinement when predicting landslide susceptibility. This results from the varying importance of individual disturbance drivers across the landscape, of which only a subset are exposed to potential disturbance interactions. This spatial effect is an important consideration when characterizing landscape-scale disturbance regimes and their interactions with other disturbances.

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Status: Complete
Type: Project
Data Types: Report
Primary Contact
Pyare, Sanjay
Email: sanjay.pyare@uas.alaska.edu
Work: 907-796-6007
Primary Agency
EPSCoR - Alaska Adapting to Changing Environments

Funding Agency
EPSCoR - Alaska Adapting to Changing Environments

Other Agencies
National Science Foundation

ISO Topics


Southeast Test Case

Source Portal
Southeast Alaska Science Catalog ::

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  • 01c8ceef3d596f40f05bf496ca00d929
    Published by Lisa
    2016-09-12 15:08:06 -0800
  • 01c8ceef3d596f40f05bf496ca00d929
    Updated by Lisa
    2016-09-12 15:07:42 -0800
  • 470f70ddabc3d336a04110c5468ab053
    New record created
    2016-09-08 17:48:10 -0800