Cited by 128Fire effects on ecosystemsPlant Water Relations and Carbon DynamicsRangeland and Wildlife Management

Managed wildfire effects on forest resilience and water in the Sierra Nevada

Open access
Boisramé, Gabrielle, Thompson, Sally, Collins, Brandon, Stephens, Scott·2017·Ecosystems

Abstract

Fire suppression in many dry forest types has left a legacy of dense, homogeneous forests. Such landscapes have high water demands and fuel loads, and when burned can result in catastrophically large fires. These characteristics are undesirable in the face of projected warming and drying in the western US. Alternative forest and fire treatments based on managed wildfire—a regime in which fires are allowed to burn naturally and only suppressed under defined management conditions—offer a potential strategy to ameliorate the effects of fire suppression. Understanding the long-term effects of this strategy on vegetation, water, and forest resilience is increasingly important as the use of managed wildfire becomes more widely accepted. The Illilouette Creek Basin in Yosemite National Park has experienced 40 years of managed wildfire, reducing forest cover by 22%, and increasing meadow areas by 200% and shrublands by 24%. Statistical upscaling of 3300 soil moisture observations made since 2013 suggests that large increases in wetness occurred in sites where fire caused transitions from forests to dense meadows. The runoff ratio (ratio of annual runoff to precipitation) from the basin appears to be increasing or stable since 1973, compared to declines in runoff ratio for nearby, unburned watersheds. Managed wildfire appears to increase landscape heterogeneity, and likely improves resilience to disturbances, such as fire and drought, although more detailed analysis of fire effects on basin-scale hydrology is needed.

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  • This resilience suggests that treatments producing structures similar to Sierra de San Pedro Mártir forests at sufficient spatial scales might also lead to resilient conditions, as has been seen in Yosemite mixed-conifer forests subjected to restored fire regimes.

    “This resilience suggests that treatments producing structures similar to SSPM forests at sufficient spatial scales might also lead to resilient conditions, as has been seen in the mixed-conifer forests in Yosemite National Park that have been subjected to restored fire regimes for several decades (Boisramé et al. 2017).”

    From Drought, Tree Mortality, and Wildfire in Forests Adapted to Frequent Fire (2018) · cites this paper as Boisramé et al. 2017

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Research works printed but not linked: 2

  1. [62]62. Thode, A. 2005. Quantifying the fire regime attributes of severity and spatial complexity using field and imagery data. PhD thesis Davis, CA: University of California.
  2. [69]69. Weiss, A. 2001. Topographic position and landforms analysis. In Poster presentation, ESRI User Conference, San Diego, CA pages 200-200.

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Authors
Boisramé, G., Thompson, S., Collins, B., & Stephens, S.
Affiliations
  • University of California, Berkeley (US)
  • US Forest Service (US)
Corresponding author
Boisramé, Gabrielle
Venue
Ecosystems
Published
2016-10-13
Volume
20
Issue
4
Pages
717-732
ISSN
  • 1432-9840 (ISSN-L)
  • 1435-0629
OpenAlex
W2531560135
Cited by
128
References
61
Citations by year
2026: 5 · 2025: 15 · 2024: 16 · 2023: 11 · 2022: 13 · 2021: 20 · 2020: 14 · 2019: 12 · 2018: 13 · 2017: 7 · 2016: 2
FWCI
8.41
Type
journal article
Language
en
Open access
Locations
  • Ecosystems (publishedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • UC Berkeley Philomathia Graduate Fellowship
  • UC Berkeley SMART Program
  • Hellman Fellows Program
  • Sigma Xi Grants in Aid of Research
  • Joint Fire Science Program (14-1-06-22)
Topics
  • Physical Sciences › Environmental Science › Global and Planetary Change › Fire effects on ecosystems
  • Physical Sciences › Environmental Science › Global and Planetary Change › Plant Water Relations and Carbon Dynamics
  • Physical Sciences › Environmental Science › Ecology › Rangeland and Wildlife Management
Keywords
fire suppression legacy, forest resilience, catchment hydrology, soil moisture, runoff coefficient, shrubland expansion, landscape heterogeneity, dry forest, Sierra Nevada, drought resilience, vegetation change

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