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Leaf litter processing by stream macroinvertebrates
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Leaf litter processing by stream macroinvertebrates
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Description
Identifier
Thesis
2170
Author
Sarkar, Babul Kanti, 1971-
Title
Leaf
litter
processing
by
stream
macroinvertebrates
Publisher
Central Connecticut State University;
Date of Publication
2011
Resource Type
Master's Thesis
Abstract
To
investigate
leaf
litter
processing
in
local
streams
, a
study
was
conducted
during
the
fall
of
2009
with
two
native
tree
species
,
northern
red
oak
(Quercus
rubra)
and
red
maple
(Acer
rubrum)
and an
invasive
species
,
Japanese
knotweed
(Fallopia
japonica)
.
Multiple
leaf
packs
of
5
g
of
each
leaf
type
were
submerged
into
three
streams
(Sandy
Brook
,
Bass
Brook
and the
Eightmile
River)
.
Leaf
packs
of
all
three
species
were
placed
at the
Sandy
and
Bass
Brook
sites
. But
leaf
packs
of
only
native
species
were
placed
at the
Eightmile
River
site
.
Replicate
leaf
packs
were
removed
from the
streams
after
7
,
15
and
45
days
.
Macroinvertebrates
were
separated
from the
leaves
and
identified
to
family
.
Leaf
processing
coefficients
were
calculated
using
the
percent
leaves
remaining
over
time
.
Among
the
three
species
,
red
maple
decomposed
faster
than
either
northern
red
oak
or
Japanese
knotweed
likely
because
it
contains
less
decay-resistant
compounds
(lignins
,
tannins)
and has a
smoother
leaf
surface
,
which
is
favorable
for
macroinvertebrates
.
Leaf
processing
coefficients
were also
higher
in
red
maple
due
to its
faster
decomposition
rates
. The
invasive
species
,
Japanese
knotweed
, was
colonized
with the
maximum
number
of
macroinvertebrates
at the
Sandy
Brook
site
.
However
, the
number
of
macroinvertebrates
was
higher
on
northern
red
oak
at the
Bass
Brook
and
Eightmile
River
sites
. The
majority
of
macroinvertebrates
at the
Sandy
and
Bass
Brook
sites
were from the
Orders
Trichoptera
and
Diptera
whereas
more
diverse
colonization
by
macroinvertebrates
was
found
at the
Eightmile
River
site
which
included
the
Orders
Trichoptera
,
Plecoptera
,
Coleoptera
and
Hymenoptera
. This
difference
in
macroinvertebrate
colonization
may
be
due
to
stream
characteristics
as
well
as the
degree
of
human
disturbance
.
Among
the
different
functional
groups
of
macroinvertebrates
,
collectors
were
dominant
at
all
the
three
sites
which
indicates
that
macroinvertebrates
used
the
leaf
packs
primarily
as
shelter
.
Subject
Forest litter -- Biodegradation -- Connecticut
Plant litter -- Biodegradation -- Connecticut
Department
Department of Biology
Advisor
Penniman, Clayton A.
Type
Text;
Digital Format
application/pdf
Language
eng
OCLC number
804653114
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