Global Change Biology,
Год журнала:
2024,
Номер
30(6)
Опубликована: Июнь 1, 2024
Human
activities
and
climate
change
cause
abiotic
factors
to
fluctuate
through
time,
sometimes
passing
thresholds
for
organismal
reproduction
survival.
Multiple
stressors
can
independently
or
interactively
impact
organisms;
however,
few
studies
have
examined
how
they
interact
when
overlap
spatially
but
occur
asynchronously.
Fluctuations
in
salinity
been
found
freshwater
habitats
worldwide.
Meanwhile,
heatwaves
become
more
frequent
extreme.
High
pulses
are
often
decoupled
time
still
collectively
zooplankton.
The
intervals
between
them,
during
which
population
growth
community
recovery
could
happen,
influence
combined
effects,
no
one
has
these
effects.
We
conducted
a
mesocosm
experiment
examine
different
times
(0-,
3-,
6-week)
salt
treatment
heatwave
exposure
their
hypothesized
that
antagonistic
effects
would
appear
having
short
because
previous
study
similar
species
were
affected
by
the
two
stressors,
additive
with
longer
since
fully
recovered
communities
respond
undisturbed
communities.
Our
findings
showed
that,
combined,
two-stressor
joint
impacts
changed
from
increased
stressors.
Surprisingly,
full
compositional
was
not
achieved
despite
period
long
enough
growth,
suggesting
legacy
earlier
treatment.
mainly
driven
small
organisms,
such
as
rotifers
cladocerans.
As
result,
recovering
responded
differently
than
communities,
leading
zooplankton
regardless
of
research
bolsters
understanding
management
multiple-stressor
issues
revealing
prior
stressor
long-lasting
on
lead
unexpected
multiple
Environmental Sciences Europe,
Год журнала:
2024,
Номер
36(1)
Опубликована: Июнь 25, 2024
Abstract
Exposure
to
synthetic
chemicals,
such
as
pesticides
and
pharmaceuticals,
affects
freshwater
communities
at
broad
spatial
scales.
This
risk
is
commonly
managed
in
a
prospective
environmental
assessment
(ERA).
Relying
on
generic
methods,
few
standard
test
organisms,
safety
factors
account
for
uncertainty,
ERA
determines
concentrations
that
are
assumed
pose
low
risks
ecosystems.
Currently,
this
procedure
neglects
potential
variation
assemblage
sensitivity
among
ecosystem
types
recommends
single
low-risk
concentration
each
compound.
Whether
systematic
differences
exist
or
their
size,
currently
unknown.
Elucidating
patterns
chemicals
could
therefore
enhance
precision
narrow
fundamental
knowledge
gap
ecology,
the
Hutchinsonian
shortfall.
We
analyzed
whether
taxonomic
turnover
between
field-sampled
macroinvertebrate
assemblages
of
different
river
across
Europe
results
copper
imidacloprid.
used
an
extensive
database
compositions
throughout
employed
hierarchical
species
distribution
model
predict
would
be
harmful
5%
taxa
(HC
5
)
assemblage.
Predicted
$$H{C}_{5}$$
HC5
values
varied
over
several
orders
magnitude.
However,
within
95%
highest
density
intervals
remained
one
order
Differences
were
minor
imidacloprid
only
slightly
higher
copper.
The
largest
difference
river-type-specific
median
was
factor
3.1.
level
below
recommended
by
European
Food
Safety
Authority
captured
current
plant
protection
products.
conclude
composition
translate
into
relatively
small
toward
evaluated
scale.
bioavailability
multi-stressor
context
not
might
exacerbate
ecological
effects
real-world
Ecology and Evolution,
Год журнала:
2024,
Номер
14(7)
Опубликована: Июнь 30, 2024
Abstract
The
Arctic
polar
nights
bring
extreme
environmental
conditions
characterised
by
cold
and
darkness,
which
challenge
the
survival
of
organisms
in
Arctic.
Additionally,
multiple
anthropogenic
stressors
can
amplify
pressure
on
fragile
ecosystems
during
this
period.
Determining
how
may
affect
life
is
crucial
for
ecological
risk
assessments
management,
but
topic
understudied.
For
first
time,
our
study
investigates
complex
interactions
stressors,
exploring
stressor
temporal
dynamics
exposure
duration
a
key
copepod
Calanus
glacialis
nights.
We
conducted
experiments
with
pulse
(intermittent)
press
(continuous)
scenarios,
involving
microplastics,
pyrene
warming
fully
factorial
design.
observed
significant
effects
survival,
pronounced
impacts
later
phases.
also
detected
two‐way
between
microplastics
pyrene,
as
well
warming,
further
intensified
presence
third
stressor.
Continuous
9
days
(press‐temporal
scenario)
led
to
greater
reductions
compared
pulse‐temporal
scenario,
two
3‐day
Notably,
inclusion
recovery
phases,
free
from
exposure,
positively
influenced
highlighting
importance
dynamics.
did
not
find
behaviour
be
affected
different
treatments.
Our
findings
underscore
intricate
amongst
their
patterns
shaping
vulnerability
overwintering
copepods
implications
managing
aquatic
under
fastest
rate
ongoing
climate
change
earth.
bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Июль 4, 2024
ABSTRACT
Communities
in
stream
ecosystems
often
respond
asymmetrically
to
increase
and
release
of
stressors,
as
indicated
by
slow
incomplete
recovery.
The
Asymmetric
Response
Concept
(ARC)
posits
that
this
is
due
a
shift
the
relative
importance
three
mechanisms:
tolerance,
dispersal,
biotic
interactions.
In
complex
natural
communities,
these
mechanisms
may
produce
alternative
outcomes
through
poorly
understood
indirect
effects.
To
understand
how
different
temporal
stressor
scenarios,
we
studied
multiple
scenarios
using
food
web
model.
We
asked
following
questions:
Do
groups
species
decline
expected
on
basis
individual
tolerance
rankings
derived
from
laboratory
experiments
when
they
are
embedded
dynamic
web?
Does
response
ecosystem
function
match
communities?
address
questions,
aggregated
data
tolerances
at
level
functional
single
stressors
affect
dynamics
nutrient
cycling.
Multiple
involved
intensities
salt
temperature
increase.
Functional
exhibited
ranking
between
contexts.
Salt
had
only
minor
transient
effects
low
but
led
loss
one
or
more
high
level.
contrast,
temperature,
alone
combination
with
salt,
caused
all
tested
levels.
Patterns
differed
communities
function.
discuss
our
findings
respect
ARC.
Graphical
Abstract
The Science of The Total Environment,
Год журнала:
2024,
Номер
948, С. 174722 - 174722
Опубликована: Июль 14, 2024
Communities
in
stream
ecosystems
often
respond
asymmetrically
to
increase
and
release
of
stressors,
as
indicated
by
slow
incomplete
recovery.
The
Asymmetric
Response
Concept
(ARC)
posits
that
this
is
due
a
shift
the
relative
importance
three
mechanisms:
tolerance,
dispersal,
biotic
interactions.
In
complex
natural
communities,
these
mechanisms
may
produce
alternative
outcomes
through
poorly
understood
indirect
effects.
To
understand
how
different
temporal
stressor
scenarios,
we
studied
multiple
scenarios
using
food
web
model.
We
asked
following
questions:
Do
groups
species
decline
expected
on
basis
individual
tolerance
rankings
derived
from
laboratory
experiments
when
they
are
embedded
dynamic
web?
Does
response
ecosystem
function
match
communities?
address
questions,
aggregated
data
tolerances
at
level
functional
single
stressors
affect
dynamics
nutrient
cycling.
Multiple
involved
intensities
salt
temperature
increase.
Functional
exhibited
ranking
between
contexts.
Salt
had
only
minor
transient
effects
low
but
led
loss
one
or
more
high
level.
contrast,
temperature,
alone
combination
with
salt,
caused
all
tested
levels.
Patterns
differed
communities
function.
discuss
our
findings
respect
ARC.
bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Авг. 19, 2024
Abstract
Urbanization
imposes
multiple
anthropogenic
stressors
on
freshwater
ecosystems,
affecting
aquatic
species’
physiological
responses.
This
study
explores
the
transcriptomic
responses
of
fish
Cottus
rhenanus
to
various
in
an
urban
river
system.
RNA
sequencing
from
stations
revealed
significant
seasonal
variations
gene
expression,
with
a
higher
number
differentially
expressed
genes
(DEGs)
observed
summer.
Fish
at
station
experiencing
highest
pressure
showed
notable
responses,
particularly
during
warmer
months,
enriched
pathways
related
metabolism,
oxidative
stress,
and
immune
Key
findings
include
activation
metabolic
stress
system
genes,
such
as
IL-17
MAPK
pathways,
influenced
by
high
temperatures,
salinity,
low
oxygen
levels.
Pathway
enrichment
analyses
highlight
impact
temperature
salinity
osmoregulation,
revealing
critical
role
transportome
adapting
changes.
These
showcase
complex
interactions
between
emphasizing
need
for
integrated
conservation
strategies
manage
stream
ecosystems.
