More info for the terms:
cover,
forest,
frequency,
moderate-severity fireWestern showy aster increases rapidly after fire [
16,
18]. Western showy aster exhibits
mass flowering in postfire years 1 and 2. The extent of flowering is
directly related to prefire abundance and postfire survivorship
[
22,
23,
24]. Western showy aster frequency increased from 8 percent before fire
to 20 percent 2 years after a moderate-severity fire in a Douglas-fir
forest in Idaho. By postfire year 7, western showy aster frequency increased to
52 percent [
16]. Following the 1977 Pattee Canyon Fire in Missoula,
Montana, western showy aster cover was 1.4 percent in 1978 and 2.0 percent in
1982 [
16].
On ponderosa pine and Douglas-fir communities in the Blue Mountains
of northeastern Oregon, western showy aster frequency and cover were higher on
sites that had been thinned 6 years previously than on prescribed burned,
thinned-and-burned, or control sites. Western showy aster was determined to be
an indicator species for thinned sites (P≤0.05). For further information
on the effects of thinning and burning treatments on western showy aster and 48
other species, see the
Research Project Summary of Youngblood and others'
[
50] study.
