Scientific Reports,
Journal Year:
2019,
Volume and Issue:
9(1)
Published: July 4, 2019
Abstract
Mesozooplankton
communities
in
marine
ecosystems
are
mainly
influenced
by
both
anthropogenic
pollutants
(e.g.
nutrients
and
heavy
metals)
natural
variables
temperature,
salinity
geographic
distance).
To
achieve
a
deeper
understanding
of
the
effects
on
mesozooplankton
communities,
we
analyzed
community
structure
from
91
stations
representing
five
typical
estuarine
regions
Bohai
Sea
assessed
relative
importance
using
multiple
statistical
approaches.
Cd
was
identified
as
leading
pollutant
for
observed
variation
among
regions,
followed
NH
4
-N
COD.
Redundancy
analysis
(RDA)
model
demonstrated
that
were
largely
determined
variables,
indicator
species
also
varied
when
responding
to
different
factors.
Variance
partitioning
showed
posed
significant
influences
(ANOVA,
P
<
0.05)
structure,
but
explanatory
power
overrode
variables.
These
observations
highlighted
shifts
zooplankton
structures
regions.
Our
results
obtained
this
study
provided
new
insights
into
mechanism
influence
areas.
Frontiers in Marine Science,
Journal Year:
2020,
Volume and Issue:
7
Published: April 24, 2020
Increasing
attention
has
recently
been
drawn
to
oxygen
depletion
and
ocean
acidification
in
coastal
seas
their
impacts
on
the
marine
ecosystem.
Intensive
organic
matter
degradation
combined
with
weak
water
exchange
is
considered
be
mainly
responsible
for
bottom
acidification.
Hypoxia
of
Bohai
Sea
have
frequently
observed
summer
seasons
over
past
decade.
In
this
study,
monthly
surveys
were
conducted
along
an
inshore-offshore
transect
north
from
May
August
2017
2018.
The
physical
structure
column
study
area
was
characterized
by
a
well-mixed
surface
layer
essentially
homogeneous
deep
that
separated
strong
pycnocline
period
mid-Jun
late
both
years.
Dissolved
(DO),
pH
dissolved
inorganic
carbon
(DIC)
also
split
into
two
layers
varied
little
each
layer.
No
significant
interannual
variations
temporal
progressions
DO,
DIC
water.
Average
DO
concentration
linearly
decreased
time
while
presented
opposite
trend.
became
increasingly
unsaturated
mid-June
when
96
µmol
L
-1
7.74.
molar
ratio
net
consumption
production
1.42,
similar
Redfield
(1.30).
Pelagic
respiration
(>
60%)
linked
fresh
prevailed
sediment
(<
40%)
contributing
shallow
body.
duration
intensity
strongly
affected
stormy
weather
events
such
as
typhoons.
Ocean Dynamics,
Journal Year:
2023,
Volume and Issue:
73(12), P. 793 - 806
Published: Nov. 13, 2023
Abstract
A
regional
ocean
ensemble
simulation
with
slightly
different
initial
conditions
demonstrates
that
internal
variability
is
formed
(not
only)
in
the
Bohai
and
Yellow
Sea.
In
this
paper,
we
analyze
relationship
between
baroclinic
instability,
(represented
by
Eady
predicted
theoretical
diffusivity
$${K}_{t}$$
Kt
;
larger
,
stronger
instability
level).
ensemble,
tidal
forcing,
spatial
correlation
amounts
to
0.80.
Also,
time
evolution
trends
of
are
similar.
Based
on
evidence,
may
be
a
significant
driver
for
variability.
This
hypothesis
validated
using
an
additional
simulations,
which
identical
first
but
time,
tides
inactivated.
modification
leads
increase
variability,
combined
strengthening
instability.
addition,
level
variation
co-vary
consistently
when
comparing
summer
winter
seasons,
both
without
tides.
Our
interpretation
causes
more
potential
energy
transformed
into
kinetic
energy,
allowing
unforced
disturbances
grow.
