Freshwater Biology,
Год журнала:
2021,
Номер
67(2), С. 365 - 377
Опубликована: Ноя. 29, 2021
Abstract
Changes
in
seasonal
cycles
(i.e.,
phenology),
can
cause
mismatches
throughout
aquatic
food
webs
and
often
are
used
as
the
primary
indicator
of
zooplankton
response
to
environmental
changes.
However,
phenology
has
been
largely
overlooked
Lake
Michigan
despite
altered
phytoplankton,
including
disappearance
offshore
spring
phytoplankton
bloom
following
Dreissena
mussel
invasions.
Multiple
measures
were
evaluated
for
major
groups
southeastern
both
before
loss
(1983–2003),
after
had
disappeared
(2007–2019).
Water
temperatures
did
not
differ
between
time
periods.
Standardised
biomass
declined
periods
all
total
cladoceran
Daphnia
summer.
varied
across
depended
on
phenological
used.
Month
peak
shifted
later
groups,
but
central
point
growing
season
change
any
group
The
onset
population
development
was
delayed
only
copepod
Limnocalanus
.
Spring
chlorophyll
concentrations
combined
with
water
provided
best
predictions
,
temperature
relatively
subtle
compared
large
changes
observed
concentrations.
By
contrast,
there
fairly
consistent
declines
that
associated
either
alone
or
combination
temperature.
This
may
mean
limitation
a
stronger
influence
production
than
Michigan.
Based
our
results
from
Michigan,
alterations
such
nutrient
reduction
invasive
dreissenid
filtering
lead
blooms
other
freshwater
lakes
could
result
delays
some
along
biomass.
Biology,
Год журнала:
2023,
Номер
12(3), С. 425 - 425
Опубликована: Март 10, 2023
Pesticides
with
novel
modes
of
action
including
neonicotinoids
and
anthranilic
diamides
are
increasingly
detected
in
global
surface
waters.
Little
is
known
about
how
these
pesticides
concern
interact
mixtures
at
environmentally
relevant
concentrations,
a
common
exposure
scenario
waterways
impacted
by
pesticide
pollution.
We
examined
effects
chlorantraniliprole
(CHL)
imidacloprid
(IMI)
on
the
sensitive
invertebrate,
Daphnia
magna.
Exposures
were
first
performed
using
waters
to
be
contaminated
agricultural
runoff.
To
evaluate
seasonal
variation
chemical
concentration
composition
waters,
we
tested
water
samples
taken
two
time
points:
during
an
extended
dry
period
after
flush
storm
event.
In
concentrations
CHL,
IMI,
other
increased
flush,
resulting
hypoactivity
dose-dependent
photomotor
responses.
then
mortality
behavior
following
single
binary
CHL
IMI.
inverse
responses
some
evidence
synergistic
mixture
exposures.
Taken
together,
this
research
demonstrates
that
all
cause
abnormal
swimming
D.
Invertebrate
endpoint
for
measuring
biological
environmental
concern.
Ecological Indicators,
Год журнала:
2022,
Номер
141, С. 109112 - 109112
Опубликована: Июль 8, 2022
The
northern
Pacific
Ocean
is
one
of
the
most
sensitive
areas
globally
to
climate
change.
Copepods
typically
account
for
between
60%
and
90%
mesozooplankton
in
open
ocean.
Because
copepods
are
a
key
link
marine
food
webs,
their
response
environmental
changes
an
important
topic
biodiversity
ecosystem
functioning
relationships.
relationship
copepod
assemblages
environment
from
traits-based
perspective
has
been
largely
unknown
until
now.
In
this
study,
we
used
functional
traits
geographic
distribution
177
species
along
latitudinal
gradient,
ranging
4°S
46°N
Ocean,
evaluate
variation
diversity
assembly
rules
assemblages.
Based
on
cluster
analysis
four
traits,
seven
groups
were
identified.
Redundancy
revealed
preferences
different
groups.
Large
carnivores
showed
stronger
preference
higher
temperatures
than
small
carnivores,
Omnivores
herbivores
chlorophyll
concentrations.
detritivores
was
nearly
independent
temperature
concentration.
Most
indices
non-linear
decreasing
trends
gradient.
These
remained
stable
tropic
subtropic
regions
(WARM
NPSG),
but
decreased
sharply
Kuroshio
extension
subarctic
gyres
(KURO
PSAG).
A
null
model
assemblage
significantly
varied
with
latitude:
filtering
dominant
KURO
PSAG,
whereas
both
limited
similarity
played
roles
WARM
NPSG,
addition
neutral
process.
Our
results
suggested
that
ocean
warming,
northward
shift
range
specific
(such
as
large
carnivores)
might
alter
function
zooplankton
communities
region.
This
study
highlights
importance
approach
pelagic
ecosystems
at
scales.
Hydrobiologia,
Год журнала:
2022,
Номер
849(16), С. 3545 - 3564
Опубликована: Авг. 1, 2022
Abstract
Human-induced
water
level
fluctuations
(WLFs)
are
among
the
major
pressures
threatening
lake
ecosystems.
Their
effect
on
meiobenthic
species
of
littoral
zone
has
been
poorly
investigated.
In
this
study,
we
aimed
at
assessing
effects
human-induced
WLFs
composition
and
functionality
benthic
copepod
assemblages
Lake
Maggiore,
Italy
Switzerland.
From
1942
to
present,
Maggiore
regulated
through
Miorina
Dam.
We
monitored
during
different
levels
defined
within
period
regulation
by
dam,
using
taxonomy-
trait-based
metrics.
observed
variation
in
overall
abundance
biomass
copepods,
as
well
number
individuals
belonging
some
trait
classes
such
ovigerous
females,
opportunists,
omnivores
deposit
feeders.
None
investigated
class
was
completely
lost.
The
results
our
study
suggest
that
ecosystem
services
supplied
likely
altered
WLFs.
Our
findings
provide
a
first
picture
WLF
impacts
assemblages,
which
can
be
useful
for
future
research
expanding
other
functional
traits.
Journal of Plankton Research,
Год журнала:
2024,
Номер
46(3), С. 338 - 347
Опубликована: Май 1, 2024
Abstract
Freshwater
ecosystems
provide
essential
services
for
human
well-being,
with
their
conservation
success
reliant
on
the
precise
quantification
of
biodiversity.
Diplostraca
(=
Cladocera)
and
Copepoda
are
diverse
groups
microcrustaceans
in
aquatic
ecosystems,
important
a
multitude
these
services.
We
examined
biodiversity
trends
groups,
utilizing
comprehensive
dataset,
approximately
2341
studies,
spanning
from
early
19th
Century
to
present
day,
aiming
at
predicting
total
number
microcrustacean
species
that
will
have
been
described
by
2100.
Descriptions
increased
until
1900s,
surged,
then
declined
after
1975.
The
predictive
models
indicate
year
2100,
an
additional
16–68%
cladoceran
37–126%
copepod
likely
be
identified,
representing
significant
portion
currently
unrealised
Eighteen
prolific
authors
contributed
quarter
descriptions,
rest
spread
among
numerous
authorities.
Based
our
extrapolation,
could
potentially
exceed
6114
2050
9046
notwithstanding
extinctions.
These
findings,
which
point
amount
biodiversity,
underscore
need
refine
estimates
beyond
conventional
expert
opinion.
Such
accuracy
is
crucial
addressing
underappreciated
scale
current
crisis.
Ecology and Evolution,
Год журнала:
2024,
Номер
14(8)
Опубликована: Авг. 1, 2024
Abstract
Freshwater
ecosystems
are
increasingly
affected
by
rising
annual
mean
temperatures
and
heatwaves.
While
heatwaves
expected
to
have
more
immediate
effects
than
temperature
increases
on
local
communities,
comparative
experimental
studies
largely
lacking.
We
conducted
a
1‐month
mesocosm
experiment
test
the
effect
of
different
warming
treatments,
constantly
raised
(+3°C)
recurring
(+6°C),
plankton
communities.
specifically
tested
how
shifts
in
zooplankton
trait
composition
functional
groups
reflected
ecosystem
function
(top‐down
control
primary
producers).
found
that
had
stronger
(specifically
body
length
mass)
groups.
Heatwaves
led
decrease
small‐bodied
grazers
(i.e.,
Rotifera)
dominance
larger
omnivorous
Copepoda,
these
resulted
weaker
top‐down
control,
leading
elevated
phytoplankton
biomass.
Altogether,
our
results
highlight
importance
indirect
via
inducing
composition,
which
may
lead
algal
blooms.
Environmental Science & Technology,
Год журнала:
2024,
Номер
58(43), С. 19419 - 19428
Опубликована: Окт. 17, 2024
To
assess
the
potential
risks
of
contemporary
levels
plastic
pollution
in
freshwater
ecosystems,
a
large-scale
experiment
was
conducted
over
10
weeks
boreal
lake
at
IISD-Experimental
Lakes
Area
(Ontario,
Canada).
Fragments
common
polymers
(polyethylene,
polystyrene,
and
polyethylene
terephthalate),
each
with
distinct
colors
buoyancies,
were
added
as
single
pulse
to
seven
in-lake
mesocosms
equal
contributions
range
environmentally
relevant
nominal
concentrations
(6-29,240
particles/L).
Two
additional
no
microplastics
used
controls.
Zooplankton
ingested
low
(mean
0.06
particles/individual
±
SD
0.07)
generally
their
total
abundance
community
composition
not
negatively
impacted.
Temporary
changes
however
observed;
zooplankton
calanoid
copepods
temporarily
stimulated
by
increasing
microplastic
concentrations,
modest,
short-term
reductions
egg
production
cyclopoid
copepod
