Stream Invertebrate Responses to Fine Sediment Depend on the Organic and Inorganic Components
Freshwater Biology,
Journal Year:
2025,
Volume and Issue:
70(3)
Published: March 1, 2025
ABSTRACT
Excess
fine
sediment
(
<
2
mm)
is
a
pervasive
stressor
of
aquatic
systems
at
global
scale.
To
date,
most
research
quantifying
ecological
response
to
deposited
has
been
conducted
without
distinguishing
between
the
organic
and
inorganic
components
sediment,
leaving
mechanistic
understanding
how
affects
macroinvertebrates
lacking.
address
this
gap,
we
examined
responses
various
stress
(inorganic,
total
mass).
Using
data
collected
from
field
surveys,
first,
quantified
invertebrate
in
two
countries:
New
Zealand
United
Kingdom
second,
whether
differed
spring
autumn
Kingdom.
Results
indicated
that
invertebrates
varied
dependent
on
both
component
facet
community
(i.e.,
taxonomic
or
functional).
The
was
highly
influential
structuring
communities,
particularly
Zealand,
whilst
Kingdom,
there
were
less
pronounced
differences
relative
importance
sediment.
Ephemeroptera,
Trichoptera
Plecoptera
taxa
(and
derived
indices)
consistently
found
be
strongly
related
all
gradients.
Further,
according
threshold
analysis,
changes
measures
occurred
lower
quantities
than
spring,
for
component.
However,
individual
taxon
trait
more
evident
spring.
Our
study
highlights
several
implications
monitoring
management
We
have
demonstrated
distinctive
inorganic,
mass)
which
may
missed
qualitative
assessments
gross
coverage
streambeds
alone.
aggregating
multiple
seasons
into
annual
overlook
important
nuances
different
exhibited
seasons.
Language: Английский
Proposal for a method to assess the habitat mosaic heterogeneity of a river bottom using fine-scale spatial analysis
Hydrobiologia,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 23, 2025
Language: Английский
Seasonal variability of lotic macroinvertebrate communities at the habitat scale demonstrates the value of discriminating fine sediment fractions in ecological assessments
Ecology and Evolution,
Journal Year:
2023,
Volume and Issue:
13(10)
Published: Sept. 29, 2023
Despite
lotic
systems
demonstrating
high
levels
of
seasonal
and
spatial
variability,
most
research
biomonitoring
practices
do
not
consider
seasonality
when
interpreting
results
are
typically
focused
at
the
meso-scale
(combined
pool/riffle
samples)
rather
than
considering
habitat
patch
dynamics.
We
therefore
sought
to
determine
if
sampling
season
(spring,
summer
autumn)
influenced
observed
macroinvertebrate
biodiversity,
structure
function
unit
scale
(determined
by
substrate
composition),
this
in
turn
assessment
fine
sediment
(sand
silt)
pressures.
found
that
biodiversity
supported
level
was
seasonally
consistent
with
contribution
nestedness
turnover
structuring
communities
varying
seasonally.
Habitat
differences
community
composition
were
evident
for
taxonomic
regardless
but
functional
communities,
and,
notably,
explained
a
greater
amount
variance
unit.
Macroinvertebrate
silt
habitats
demonstrated
strong
functionally
comparable
sand
spring
gravel
autumn.
Sand
impoverished
compared
other
season.
Silt
increase
Ephemeroptera,
Plecoptera
Trichoptera
(EPT)
taxa
richness
from
into
autumn,
while
vegetation
displayed
peak
EPT
abundance
summer.
Only
temporal
variability
evenness
suggesting
these
different
terms
their
resource
partitioning
productivity
over
time
habitats.
Gravel
appeared
be
more
stable
remaining
consistent.
To
accurately
evaluate
influence
on
ecosystems,
it
is
imperative
routine
scientific
discriminate
between
fractions,
given
they
support
particularly
during
autumn
months.
Language: Английский
Context specific effects of substrate composition on the taxonomic and functional diversity of macroinvertebrate communities in temperate lowland streams
Ecology and Evolution,
Journal Year:
2024,
Volume and Issue:
14(8)
Published: Aug. 1, 2024
Substrate
composition
has
been
widely
recognised
as
a
primary
variable
shaping
lotic
macroinvertebrate
communities
at
the
habitat
unit
level.
However,
fundamental
understanding
of
how
inhabiting
mineralogical
habitats
(i.e.,
gravel,
sand
and
silt)
are
structured
across
differing
rivers
is
lacking.
Moreover,
research
largely
focusses
on
gravel
beds
fine
sediment
in
general
(<2
mm)
result
detailed
field
observations
specifically
silt
fractions
Using
data
from
five
UK
streams
collated
published
studies,
we
assess
taxonomic
functional
biodiversity
(alpha
beta
diversity)
level
(as
defined
by
substrate
sand,
gravel).
We
found
that
were
clearly
different
all
units
for
each
individual
stream
(and
landscape
scale),
with
comparable,
but
less
strong,
distinctions
between
substrates
community
composition.
alpha
diversity
metrics
Local
Contribution
to
Beta
Diversity
(LCBD)
recorded
among
varied
significantly
rivers,
amount
variation
explained
demonstrated
considerable
differences
suggesting
strong
context
dependence.
The
depositional
support
discrete
levels
within
rivers.
advocate
care
should
be
taken
when
seeking
generalise
patterns
scale
our
study
highlights
high
degree
dependency
considering
role
template.
results
provide
evidence
discriminating
size
(sand
or
important
fully
elucidate
wider
ecological
importance
these
distinct
they
support.
Language: Английский
Phenotypic plasticity of a Baetid mayfly larvae (Baetis rhodani) at sites with high levels of deposited fine sediment
Ecological Entomology,
Journal Year:
2024,
Volume and Issue:
49(4), P. 500 - 507
Published: March 16, 2024
Abstract
Excess
fine
sediment
(particles
<2
mm)
delivery
and
deposition
in
freshwater
systems
is
a
significant
factor
structuring
aquatic
communities
populations.
Invertebrate
gill
surfaces
can
become
covered
with
sediment,
potentially
compromising
osmoregulatory
function.
Ionocytes
are
specialised
structures
for
osmoregulation
found
on
the
tracheal
gills
of
mayflies.
The
number
cells
has
been
shown
to
change
order
maintain
demands
under
environmentally
variable
conditions.
To
investigate
whether
ionocytes
vary
response
pressure,
individuals
Baetis
rhodani
were
collected
from
two
high
low
cover
sites,
respectively,
UK.
Tracheal
subsequently
examined
present
upper
lower
surfaces,
standardised
by
size.
Results
indicated
that
was
significantly
higher
mayflies
areas
cover.
High
sites
also
characterised
altitude
dissolved
oxygen
concentrations.
Mayfly
larger
than
those
sites.
results
illustrate
potential
mayfly
larvae
demonstrate
phenotypic
plasticity
pressures
associated
but
these
responses
likely
dependent
composition
deposits
(organic
or
mineral)
Language: Английский