Forest Management & Lynx Habitat Trends

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Forest Management & Lynx Habitat Trends
Erin Simons-Legaard
Collaborators: Kasey Legaard, Dan Harrison, Mark
McCollough, Aaron Weiskittel, Caitlin Andrews
Northern Appalachian/Acadian Ecoregion
Hoving et al. 2003
Eastern spruce budworm (Choristoneura fumiferana Clem.)
State-run spray protection program,
treating several million acres annually
at its peak
Proposed spray blocks, 1979
Irland et al. 1988
Severe mortality
- 20-25 million cords of spruce and fir
killed
Salvage logging by commercial
clearcut
Approx. 1500 ac salvage
harvest block
Maine Forest Practices Act, 1989
- First legal definition of a
clearcut
- Regulation of clearcut size,
configuration, regeneration
The Forestry Rules of Maine, 2014; MFS
Maine Forest Practices Act, 1989
1970-80s budworm
salvage clearcuts
Forest Practices Act
category 1 clearcuts
Annual statewide harvest
Ownership change
Lilliholm et al. 2010
Ownership change
Ownership change
Conservation easements
Landowner change history, 1994-2007
Forest disturbance, age, composition mapping
Landsat Thematic Mapper:
2010
2007
2004
2001
1998
1995
1993
1991
1988
1985
2-3 year intervals
- stand-replacing and
partial canopy disturbance
- disturbance intensity
(% basal area removed)
Landsat Multispectral Scanner:
1985
1982
1978
1975
1973
2-4 year intervals
- stand-replacing
disturbance
Forest disturbance, age, composition mapping
1985 Landsat:
1988 Landsat:
Harvest, 1985-1988
Forest disturbance, age, composition mapping
1988 Landsat:
1985-1988 forest disturbance:
Forest disturbance, age, composition mapping
1993 Landsat:
1985-1993 forest disturbance:
Fire
Fire
Insects
Harvest
Wind
Spatially Interactive
Landscape
Wind
Biomass
Fire
Fire
Insects
Harvest
Wind
Spatially Interactive
Landscape
Wind
Biomass
• Ownership ca. 2010
• >80 owners
• >500 parcels
Snowshoe hare/Lynx foraging habitat
Snowshoe hare/Lynx foraging habitat
Snowshoe hare/Lynx foraging habitat
S. Olsen 2014
Maine Forest Service
2014 trap counts
Total SBW Count
0-1
2 - 30
40 - 50
60 - 100
200
300 - 600
Spruce-fir Live Biomass
Hennigar et al. 2013
Percent change in forest area (2010-2110)
Ownership change
Lilliholm et al. 2010
Adapted from Iverson et al 2007
Suitable habitat for S-F forest
• Number of days >5⁰C
• Mean temp in the coldest month
• Mean annual precipitation
• Growing season precipitation
• Associated with areas that are colder and
snowier
Forest Management & Lynx Habitat Trends
Erin Simons-Legaard
Collaborators: Kasey Legaard, Dan Harrison, Mark
McCollough, Aaron Weiskittel, Caitlin Andrews

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