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Effects of Old World Bluestem (Bothriochloa ischaemum) on an avian community within the...
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Effects of Old World Bluestem (Bothriochloa ischaemum) on an avian community within the mixed-grass prairie
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Author
Steier
,
Jan
Title
Effects
of
Old
World
Bluestem
(Bothriochloa
ischaemum)
on an
avian
community
within
the
mixed-grass
prairie
Degree Program
Biology
Abstract
Various
grassland
bird
species
have
exhibited
population
declines
over
the
past
60
years
.
Recent
interest
in
understanding
the
causes
for the
decline
in
grassland
birds
has
prompted
numerous
research
studies
.
Several
studies
have
focused
on
changes
in
agricultural
practices
,
such
as the
use
of
non-native
grasses
for
re-vegetation
. The
objective
of
my
study
was to
determine
the
effects
a
non-native
grass
.
Old
World
Bluestem
(OWB
;
Bothriochloa
ischaemum
;
i.e.
,
WW-Spar
and
WW-Iron
Master)
might
have on
bird
species
abundance
,
richness
, and
food
availability
.
Three
pastures
each
of
native
range
,
expired
Conservation
Reserve
Program
, and
OWB
were
sampled
from
May
-
July
2001
in
Comanche
County
,
KS
.
I
used
a
point-count
method
along
three
sample
transects
in
each
pasture
to
assess
bird
abundance
and
species
richness
.
Additionally
,
arthropods
were
collected
along
10
transects
in
each
pasture
using
a
sweep-net
. The
results
indicated
significant
differences
in
bird
abundance
and
species
richness
among
the
pastures
.
However
,
I
could
not
determine
which
pastures
differed
from
each
other
in
bird
abundance
and
species
richness
and,
therefore
cannot
conclude
that
OWB
pastures
were
unfavorable
to
grassland
birds
.
Significant
differences
were
found
in
arthropod
biomass
where
OWB
pastures
had
significantly
less
biomass
than the
other
pasture
types
.
I
conclude
that
lower
arthropod
biomass
or
food
availability
to
nesting
grassland
birds
might
limit
reproductive
success
in
OWB
pastures
relative
to
CRP
and
native
pastures
and
potentially
contribute
to their
decline
.
Date Original
2002
Publisher
Fort Hays State University
Relation
Digital reproduction of the Fort Hays State University Theses Collection.
Type
Text
Format
application/pdf
Identifier
SteierJan_2002_web.pdf
Source
LD2652 .T5 B5 S74 2002
Language
eng
Relation-Requires
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http://get.adobe.com/reader/.
Rights
Copyright 2002 Jan Steier
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