Environmental Research,
Год журнала:
2022,
Номер
218, С. 114851 - 114851
Опубликована: Ноя. 19, 2022
The
amount
of
mercury
(Hg)
in
Arctic
lake
food
webs
is,
and
will
continue
to
be,
affected
by
rapid,
ongoing
climate
change.
At
warmer
temperatures,
fish
require
more
energy
sustain
growth;
changes
their
metabolic
rates
consuming
prey
with
potentially
higher
Hg
concentrations
could
result
increased
accumulation.
To
examine
the
potential
implications
warming
on
forage
accumulation
lakes,
we
quantified
growth
Ninespine
Stickleback
Pungitius
pungitius
under
different
temperature
diet
scenarios
using
bioenergetics
models.
Four
were
considered
that
examined
role
climate,
diet,
×
elevated
Hg.
As
expected,
annual
but
largely
dependent.
Compared
current
0.3
g⋅y-1,
at
least
200%
for
energy-dense
benthic
decreased
40%
pelagic
prey.
baseline
levels,
burden
per
kilocalorie
declined
up
43%
consumption
-
indicating
strong
somatic
dilution
no
than
4%
consumption;
led
moderate
declines
benthic-foraging
increases
pelagic-foraging
fish.
Bioenergetics
models
demonstrated
complex
interaction
water
temperature,
growth,
proportions,
respond
Further
work
is
needed
resolve
mechanisms
linking
change
availability
uptake
freshwater
systems.
Environmental Research,
Год журнала:
2023,
Номер
231, С. 116187 - 116187
Опубликована: Май 23, 2023
Boreal
lakes
demonstrate
pronounced
seasonality,
where
the
warm
open-water
season
and
subsequent
cold
ice-covered
dominate
natural
cycles.
While
fish
muscle
total
mercury
concentration
(mg/kg)
[THg]
is
well
documented
in
summer
months,
there
limited
knowledge
on
winter
spring
dynamics
from
various
foraging
thermal
guilds.
This
year-round
study
tested
how
seasonality
influences
its
bioaccumulation
three
percids,
perch
(Perca
fluviatilis),
pikeperch
(Sander
lucioperca),
ruffe
(Gymnocephalus
cernua),
cyprinids,
roach
(Rutilus
rutilus),
bleak
(Alburnus
alburnus),
bream
(Abramis
brama)
deep
boreal
mesotrophic
Lake
Pääjärvi,
southern
Finland.
Fish
were
sampled
was
quantified
dorsal
during
four
seasons
this
humic
lake.
Bioaccumulation
regression
slopes
(mean
±
STD,
0.039
0.030,
range
0.013-0.114)
between
length
steepest
after
spawning
shallowest
autumn
for
all
species.
significantly
higher
winter-spring
than
summer-autumn
however,
not
cyprinids.
The
lowest
observed
autumn,
likely
due
to
recovery
spawning,
somatic
growth
lipid
accumulation.
best
described
by
multiple
models
(R2adj:
52-76%)
which
included
varying
combinations
of
seasonally
changing
environmental
(water
temperature,
carbon,
nitrogen,
oxygen
saturation)
biotic
factors
(gonadosomatic
index,
sex)
seasonal
variation
across
species
suggests
a
need
standardized
sampling
long-term
monitoring
avoid
any
bias.
From
fisheries
consumption
perspective
lakes,
both
would
improve
muscle.
Environmental Research,
Год журнала:
2022,
Номер
218, С. 114851 - 114851
Опубликована: Ноя. 19, 2022
The
amount
of
mercury
(Hg)
in
Arctic
lake
food
webs
is,
and
will
continue
to
be,
affected
by
rapid,
ongoing
climate
change.
At
warmer
temperatures,
fish
require
more
energy
sustain
growth;
changes
their
metabolic
rates
consuming
prey
with
potentially
higher
Hg
concentrations
could
result
increased
accumulation.
To
examine
the
potential
implications
warming
on
forage
accumulation
lakes,
we
quantified
growth
Ninespine
Stickleback
Pungitius
pungitius
under
different
temperature
diet
scenarios
using
bioenergetics
models.
Four
were
considered
that
examined
role
climate,
diet,
×
elevated
Hg.
As
expected,
annual
but
largely
dependent.
Compared
current
0.3
g⋅y-1,
at
least
200%
for
energy-dense
benthic
decreased
40%
pelagic
prey.
baseline
levels,
burden
per
kilocalorie
declined
up
43%
consumption
-
indicating
strong
somatic
dilution
no
than
4%
consumption;
led
moderate
declines
benthic-foraging
increases
pelagic-foraging
fish.
Bioenergetics
models
demonstrated
complex
interaction
water
temperature,
growth,
proportions,
respond
Further
work
is
needed
resolve
mechanisms
linking
change
availability
uptake
freshwater
systems.
