Chemistry and Ecology,
Год журнала:
2025,
Номер
unknown, С. 1 - 23
Опубликована: Март 5, 2025
Despite
their
small
size,
wetland
pan
systems
play
a
crucial
role
as
habitats
for
diverse
aquatic
biota.
Macroinvertebrate
diversity
across
12
wetlands
in
relation
to
geological
type
(i.e.
sandstone,
granite,
basalt
and
rhyolite)
hydroperiod
high,
low)
protected
subtropical
national
park
South
Africa
was
studied.
Water
temperature,
pH,
TDS,
conductivity,
phosphates
salinity
showed
significant
differences
among
hydroperiods,
with
types
being
observed
water
temperature
ammonium.
Most
of
the
sediment
variables
were
found
be
hydroperiods
types.
5145
macroinvertebrate
individuals
belonging
41
genera
9
orders
identified.
Macroinvertebrates
during
high
abundant
low
hydroperiod.
The
canonical
correspondence
analysis
explained
35.8%
fitted
cumulative
variation
community
structure
environmental
different
This
study
aimed
provide
better
understanding
how
they
are
influenced
by
hydroperiod,
this
information
is
it
aids
providing
management
options
refuge
taxa
area
protection
these
wetlands.
Wiley Interdisciplinary Reviews Water,
Год журнала:
2024,
Номер
11(4)
Опубликована: Март 5, 2024
Abstract
Rising
water
temperatures
in
rivers
due
to
climate
change
are
already
having
observable
impacts
on
river
ecosystems.
Warming
has
both
direct
and
indirect
aquatic
life,
further
aggravates
pervasive
issues
such
as
eutrophication,
pollution,
the
spread
of
disease.
Animals
can
survive
higher
through
physiological
and/or
genetic
acclimation,
behavioral
phenological
change,
range
shifts
more
suitable
locations.
As
such,
those
animals
that
adapted
cool‐water
regions
typically
found
high
altitudes
latitudes
where
there
fewer
dispersal
opportunities
most
at
risk
future
extinction.
However,
sub‐lethal
animal
physiology
phenology,
body‐size,
trophic
interactions
could
have
significant
population‐level
effects
elsewhere.
Rivers
vulnerable
warming
because
historic
management
left
them
exposed
solar
radiation
removal
riparian
shade,
hydrologically
disconnected
longitudinally,
laterally,
vertically.
The
resilience
riverine
ecosystems
is
also
limited
by
anthropogenic
simplification
habitats,
with
implications
for
resource
use
resident
organisms.
Due
complex
ecosystems,
species‐specific
response
organisms
warming,
predicting
how
will
challenging.
Restoring
provide
connectivity
heterogeneity
conditions
would
a
expected
co‐occurring
pressures,
including
should
be
considered
priority
part
global
strategies
adaptation
mitigation.
This
article
categorized
under:
Science
Water
>
Environmental
Change
Life
Nature
Freshwater
Ecosystems
Stresses
Pressures
Ecological Indicators,
Год журнала:
2024,
Номер
158, С. 111561 - 111561
Опубликована: Янв. 1, 2024
A
more
profound
comprehension
of
various
facets
biodiversity
is
essential
for
advancing
sustainable
governance
and
its
associated
ecosystem
services.
In
this
study,
we
delved
into
the
composition
beta
diversity
within
macroinvertebrates
communities
in
Thousand
Islands
Lake
catchment
area.
Subsequently,
investigated
factors
influencing
diverse
alpha
diversity,
ultimately
employed
structural
equation
modeling
to
analyze
pathways
through
which
both
regional
environmental
factors,
like
climate
land
use,
local
variables
collectively
impact
distinct
ecosystem.
Our
results
showed
that
(i)
taxonomic
phylogenetic
diversities
were
primarily
determined
by
turnover,
while
functional
predominantly
nestedness;
(ii)
are
influenced
spatial
variables,
with
environment
ranking
second,
use
explaining
lowest
proportion
according
variance
partitioning;
(iii)
mainly
affected
especially
climatic
(precipitation)
hydrological
(depth)
revealed
modeling.
These
offer
compelling
evidence
composition,
ecological
drivers,
specific
influence
vary
across
different
scales.
Future
studies
could
focus
on
as
well
consider
effects
at
scales,
would
provide
new
insights
potential
patterns
community
associations.
Abstract
Context
Global
change,
including
land-use
change
and
habitat
degradation,
has
led
to
a
decline
in
biodiversity,
more
so
freshwater
than
terrestrial
ecosystems.
However,
the
research
on
freshwaters
lags
behind
marine
studies,
highlighting
need
for
innovative
approaches
comprehend
biodiversity.
Objectives
We
investigated
patterns
relationships
between
biotic
uniqueness
abiotic
environmental
drainage
basins
worldwide.
Methods
compiled
high-quality
data
aquatic
insects
(mayflies,
stoneflies,
caddisflies
at
genus-level)
from
42
spanning
four
continents.
Within
each
basin
we
calculated
(local
contribution
beta
diversity,
LCBD)
of
insect
assemblages,
types
heterogeneity,
LCEH),
categorized
into
upstream
land
cover,
chemical
soil
properties,
stream
site
landscape
position,
climate.
A
mixed-effects
meta-regression
was
performed
across
examine
variations
strength
LCBD-LCEH
relationship
terms
latitude,
human
footprint,
major
continental
regions
(the
Americas
versus
Eurasia).
Results
On
average,
LCBD
LCEH
were
weak.
direction
varied
among
basins.
Latitude,
footprint
index,
or
location
did
not
explain
significant
variation
relationship.
Conclusions
detected
strong
context
dependence
Varying
conditions
gradient
lengths
basins,
historical
contingencies,
stochastic
factors
may
these
findings.
This
underscores
basin-specific
management
practices
protect
biodiversity
riverine
systems.
Water Research,
Год журнала:
2024,
Номер
260, С. 121903 - 121903
Опубликована: Июнь 6, 2024
Ongoing
global
climate
change
will
shift
nature
towards
Anthropocene's
unprecedented
conditions
by
increasing
average
temperatures
and
the
frequency
severity
of
extreme
events,
such
as
heatwaves.
While
climatic
changes
pose
an
increased
threat
for
freshwater
ecosystems,
other
stressors
like
pesticides
may
interact
with
warming
lead
to
unpredictable
effects.
Studies
that
examine
underpinned
mechanisms
multiple
stressor
effects
are
scarce
often
lack
environmental
realism.
Here,
we
conducted
a
experiment
using
outdoor
mesocosms
natural
assemblages
macroinvertebrates,
zooplankton,
phytoplankton,
macrophytes,
microbes.
The
neonicotinoid
insecticide
imidacloprid
(1
µg/L)
were
investigated
in
combination
three
temperature
scenarios
representing
ambient,
elevated
(+4°C),
heatwaves
(+0
8°C),
latter
two
having
similar
energy
input.
We
found
dissipation
patterns
all
treatments
lowest
half-lives
under
both
(DT50:
3
days)
highest
ambient
4
throughout
experiment.
Amongst
communities,
only
zooplankton
community
was
significantly
affected
combined
treatments.
This
demonstrated
low
chemical
sensitivity
lagged
significant
negative
cyclopoids.
Heatwaves
caused
early
long-lasting
on
compared
temperatures,
Polyarthra,
Daphnia
longispina,
Lecanidae,
cyclopoids
being
most
negatively
taxa,
whereas
Ceriodaphnia
nauplii
showed
positive
responses
temperature.
Community
recovery
from
stress
slower
heatwaves,
suggesting
temperature-enhanced
toxicity.
Finally,
microbial
macrofauna
litter
degradation
enhanced
temperature,
also
imidacloprid.
A
structural
equation
model
depicted
cascading
food
web
stronger
relationships
at
higher
than
lower
trophic
levels.
Our
study
highlights
series
imidacloprid-stressed
freshwaters.
Proceedings of the National Academy of Sciences,
Год журнала:
2024,
Номер
121(14)
Опубликована: Март 18, 2024
Climate
change
is
affecting
the
phenology
of
organisms
and
ecosystem
processes
across
a
wide
range
environments.
However,
links
between
organismal
process
in
complex
communities
remain
uncertain.
In
snow-dominated
watersheds,
snowmelt
spring
early
summer,
followed
by
long
low-flow
period,
characterizes
natural
flow
regime
streams
rivers.
Here,
we
examined
how
earlier
will
alter
mountain
stream
via
an
outdoor
mesocosm
experiment
channels
Eastern
Sierra
Nevada,
California.
The
treatment,
simulating
3-
to
6-wk
return
summer
baseflow
conditions
projected
under
climate
scenarios
region,
increased
water
temperature
reduced
biofilm
production
respiration
ratios
32%.
Additionally,
most
invertebrate
species
explaining
community
(56%
67%
benthic
emergent
taxa,
respectively),
changed
as
consequence
treatment.
Further,
flux
pulses
dominant
insect
group
(Chironomidae)
almost
doubled
magnitude,
benefitting
generalist
riparian
predator.
Changes
both
structure
(composition)
functioning
(production)
were
mostly
fine-scale,
response
diversity
at
level
stabilized
seasonally
aggregated
responses.
Our
study
illustrates
vulnerable
rain-to-snow
transition
poised
dynamics
food
webs
fine-scale
changes
phenology—leading
novel
predator–prey
“matches”
or
“mismatches”
even
when
appear
stable
annual
scale.