Effect of river and floodplain restoration and reconnection on aquatic macroinvertebrates: seasonal responses over time
Restoration Ecology,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 22, 2025
Innovative
floodplain
reconnection
actions
are
being
implemented
in
various
river
systems,
with
the
goal
of
restoring
natural
processes
that
support
dynamic
floodplains,
rivers,
and
aquatic
ecosystems.
But
how
effective
these
restoration
actions?
Aquatic
macroinvertebrates
respond
quickly
to
flow,
substrate,
temperature
changes.
Therefore,
we
examined
response
benthic
macroinvertebrate
assemblages
an
intensive
project
South
Fork
McKenzie
River
western
Oregon
(U.S.A.)
for
3
years
(spring
fall
each
year)
following
implementation.
The
was
expected
increase
geomorphic
heterogeneity
surface
water
inundation
during
low‐flow
conditions,
thereby
increasing
biotic
diversity.
As
predicted,
restored
area
had
more
at
base
flow
compared
pre‐restoration
conditions
and,
as
such,
supported
two
four
times
greater
biomass
across
entire
wetted
area,
whereas
on
a
per‐square
meter
scale
did
not
throughout
study.
Restoration
altered
physical
riffle
habitat
types
community
structure,
reflecting
slower‐water
traits.
Although
appear
change
pools
or
glides,
it
number
features
active
bottomland.
Gamma
diversity
taxa
richness
higher
riffles
post‐restoration
control
area.
Alpha
restoration,
but
Shannon
measures
both
pools,
indicating
even
distribution
biomass.
These
findings
hypothesis
can
overall
Language: Английский
Floodplain Restoration and Its Effects on Summer Water Temperature and Macroinvertebrates in Whychus Creek, Oregon (USA)
River Research and Applications,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 23, 2024
ABSTRACT
Stream
restoration
is
a
proposed
climate
adaptation
tool;
however,
outcomes
of
floodplain
on
stream
temperature
have
been
debated.
Despite
growing
number
studies
that
investigated
water
in
restored
streams,
few
quantified
variations
new
habitat
types
created
by
hydrogeomorphic
processes
to
explore
the
effects
aquatic
macroinvertebrates.
We
evaluated
hypotheses:
(1)
increases
diversity,
(2)
diversity
variability,
and
(3)
macroinvertebrate
assemblage
associations.
In
August
2021,
we
collected
environmental
data
describe
habitats,
quality
(continuous
discrete),
macroinvertebrates
40
riffle,
pool,
off‐channel
sites
being
restored,
Whychus
Creek,
Oregon,
USA.
Our
study
site
comparison
three
reaches—one
2012,
another
2016,
an
unrestored
(control)
will
soon
undergo
restoration.
Evaluations
hypotheses
show:
Habitat
reaches
effectively
habitats
versus
only
one
control
(riffles),
variability
(off‐channel)
high
low,
suggest
range
hyporheic
connectivity
flow
paths
are
present,
different
assemblage,
with
16
additional
taxa
thermal
optima
approximately
doubled
when
accounted
for.
results
support
idea
creates
more
diverse
conditions
communities
reaches.
Language: Английский