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Vegetation mortality
survey,
San Bernardino National Forest
20 July 2001
As viewed by the FireMapper
system
in reflected red, near-IR, and thermal IR frequencies
Images were collected
from the PSW Airborne Sciences Aircraft flying over the
area near Cedarpines Park.
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The forests in the San Bernardino Mountains and the
Peninsular Ranges are seriously drought stressed. In addition,
some have diseases (dwarf mistletoe, annosus root disease)
which also cause severe stress. Stressed trees can't produce
enough resin to protect against pathogens. Examples of these
include the California flatheaded borer, mountain pine beetle,
red turpentine beetle, Jeffrey-pine beetle and western pine
bark beetle. The fir engraver attacks fir trees while the
Ips beetle is a scavenger that attacks the tops of trees,
along with slash and seriously distressed trees.
Trees in the San Bernardinos are subject to drought, air
pollution, and complexes of pests, not just beetles. Deciduous
species are affected the same as the coniferous species;
black oaks there are suffering from drought stress and also
defoliation by the fruit-tree leafroller.
(Entomologist Dr. Laura Merrill, personal
communication)
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Location Map:
Shaded relief map of the Silverwood Lake, Lake
Arrowhead, Keller Peak, North San Bernardino, Hamilton
Mountain area. Color overlays show area of processed
imagery.
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window
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Image 1:
Mosaic of images from flight over Cedarpines Park.
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window at full resolution
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Healthy vegetation is bright green; stressed or dying
vegetation is orange-brown in this false-color depiction.
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(This RGB image shows reflected red light at 650 nm in
red, reflected NIR at 850 nm in green, and thermal IR at
10.5 um in blue.)
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Image 1a:
Portion of above image.
Mosaic of images from flight over study plots near Cedarpines Park. |
Click on the image above to view a larger JPEG image in a new browser window at full resolution
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Healthy vegetation is bright green; stressed or dying vegetation is orange-brown in this false-color depiction.
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(This RGB image shows reflected red light at 650 nm in red, reflected NIR at 850 nm in green, and thermal IR at 10.5 um in blue.) |
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