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Effects of road construction and bull thistle (Cirsium vulgare) on the plant communities of Bryce...
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Effects of road construction and bull thistle (Cirsium vulgare) on the plant communities of Bryce Canyon National Park, Utah
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Description
Author
Kritsch
,
Margaret
A.
Title
Effects
of
road
construction
and
bull
thistle
(Cirsium
vulgare)
on the
plant
communities
of
Bryce
Canyon
National
Park
,
Utah
Degree Program
Biology
Abstract
Disturbance
of
ecosystems
by
road
construction
results
in
habitat
fragmentation
and
edge
effects
.
Studies
assessing
effect
of
road
construction
on the
native
plant
communities
and
dispersal
of
exotic
plant
species
have
indicated
this
type
of
disturbance
promotes
invasion
by
exotic
plants
.
I
studied
the
relationship
of
recent
road
construction
and
spread
of
bull
thistle
(Cirsium
vulgare
(Savi)
Ten.)
, a
nonnative
,
invasive
plant
species
found
primarily
along
disturbed
roadsides
of
Bryce
Canyon
National
Park
(BRCA)
in
southern
Utah
.
Additionally
,
I
assessed
the
effects
of
road
construction
and
bull
thistle
on the
plant
community
structure
in
BRCA
.
Community
and
population
data
were
collected
along
four
transects
at
six
different
sites
.
Three
of the
six
sites
were
designated
"
disturbed
"
because
of
recent
road
construct
ion
and the
other
three
sites
were
designated
"
undisturbed
".
Transects
at
each
of these
sites
were
placed
at
increasing
distances
from the
main
park
road
,
Federal
Highway
63
.
I
hypothesized
that the
number
of
bull
thistle
individuals
would
decrease
as
distance
from the
road
increased
.
I
also
hypothesized
that the
presence
of
bull
thistle
and
road
construction
would
affect
plant
community
structure
by
decreasing
species
richness
and
diversity
.
Furthermore
,
I
hypothesized
that
more
non-native
plant
species
would be
present
at
sites
that had been
disturbed
through
recent
road
construction
.
Bull
thistle
was
found
only
at
Disturbed
Sites
, with the
greatest
density
found
on the
transect
closest
to the
road
.
Results
also
indicated
Disturbed
and
Undisturbed
Sites
differed
significantly
with
Undisturbed
sites
having
higher
species
richness
,
species
diversity
, and
species
dominance
relative
to
Disturbed
sites
.
All
parameters
at
Undisturbed
and
Disturbed
Sites
,
though
,
decreased
as
distance
from the
road
increased
.
Disturbed
Sites
were
found
to have a
greater
number
of
nonnative
plant
species
than the
Undisturbed
Sites
.
Date Original
2003
Publisher
Fort Hays State University
Relation
Digital reproduction of the Fort Hays State University Theses Collection.
Type
Text
Format
application/pdf
Identifier
KritschMargaret_2003_web.pdf
Source
LD2652 .T5 B5 K75 2003
Language
eng
Relation-Requires
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http://get.adobe.com/reader/.
Rights
Copyright 2003 Margaret A. Kritsch
Access Requirements
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http://www.fhsu.edu/library/electronic/off-campus-access/
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