remote sensing of vegetation Flashcards
if a plant grows in _____conditions the cuticle will be ____ and filter out light
bright and thick
what are the pigments of vegetation
chlorophyll a and b
carotene
xanthophyll
phycoerythrin
what color does chlorophyll a and b absorb
blue and red
what colour does phycoerthyrin absorb
green and red
what happens during senescence
chlorophyll is no longer produced
what does anthrocyanin do?
reabsorbs sugar and nutrients for winter, turns red
what does remote sensing a canopy show
vegetation stress
yield
hybrid variables
how can you use remote sensing to show veg stress
plants absorb less in absorption bands due to lack of chlorophyll- appear yellow
why does NIR increase in healthy plants
Plants absorb radiant energy very
effectively in blue and red
direct sunlight contains most of
its energy in the NIR range
land plants have adapted to reflect a
large portion of the incident energy or
transmit it
what does turgid mean
plants have as much water stored as possible
the _____turgidity of leaves, the _____ reflectance of MIR
greater, lower
what is bidirectional reflectance
the relationship between the angle of the sun and sensor geometry
what is a hot spot
when bidirectional effects cause a shadow to be no longer visable.
when is the best time to collect RS data for vegetation
early in the year
