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.
Environment International,
Год журнала:
2021,
Номер
156, С. 106735 - 106735
Опубликована: Июнь 28, 2021
In
this
study,
the
occurrence,
distribution,
sources,
and
risk
of
29
legacy
emerging
per-
polyfluoroalkyl
substances
(PFAS)
in
four
kinds
environmental
matrices
Bohai
Sea
were
investigated.
The
∑PFAS
concentrations
range
0.40
~
61.4
ng/g
dry
weight
(dw)
inflow
river
sediments,
0.48
dw
soil
near
inflow,
0.37
4.18
sea
13.3
718
ng/L
seawater.
PFAS
with
eight
carbons
accounted
for
>
62.2%
by
mass,
all
samples.
Perfluorooctanoic
acid
(PFOA)
was
dominant
both
mass
occurrence.
Seawater
from
Laizhou
Bay
(south
Sea)
sediments
Liaodong
(northeast
had
highest
levels
∑PFAS.
sediment-water
partition
coefficient
organic
carbon
content
normalized
(log
Kd
log
Koc)
calculated
using
measured
to
determine
their
distribution
seawater
sediments.
values
Koc
increased
increasing
CF2
units
perfluoroalkyl
carboxylic
acids
(PFCAs)
perfluoroalkane
sulfonic
(PFSAs).
Six
primary
sources
identified
region,
including
aqueous
film-forming
foams
(AFFF),
metal
plating,
food
packages,
fluorine
chemical
industry,
fluoropolymer
manufacture,
domestic
pollution.
quotient
(RQ)
<
1,
indicating
that
organisms
at
low
exposure.
Progress In Oceanography,
Год журнала:
2021,
Номер
193, С. 102553 - 102553
Опубликована: Март 19, 2021
In
recent
years,
advances
have
been
made
toward
understanding
the
oceanic
circulation
dynamics
in
Taiwan
and
Tsushima
straits,
as
well
over
central
shelf
of
East
China
Sea
(ECS)
southern
Yellow
Sea.
ECS
between
50
m
100
isobaths
is
attributed
to
confluences
northeastward
Strait
Current
(TSC)
Kuroshio
intrusion
northeast
Taiwan.
Although
relative
importance
interaction
these
two
currents
not
documented,
driving
mechanisms
underlying
TSC
extensively
studied
decades.
The
first
set
long-term
(2009–2011)
observations
showed
that
a
stronger/weaker
(~2.37
Sv/~0.64
Sv)
appears
summer/winter.
However,
against
northeasterly
winds
winter
are
still
debatable.
destination
current
formation
Warm
better
understood.
volume
transport
this
~2.67
Sv.
northeastward-flowing
has
branches
isobaths.
northwestward
(YSWC)
characterizes
circulations
Trough
winter,
propagation
coastally
trapped
waves
greatly
regulates
flow
pattern
YSWC.
Cold
Water
Mass
alters
summer.
Journal of Geophysical Research Biogeosciences,
Год журнала:
2019,
Номер
124(9), С. 2768 - 2785
Опубликована: Авг. 29, 2019
Abstract
The
Bohai
Sea
to
the
west
of
North
Yellow
in
Northwest
Pacific
is
a
semienclosed
shallow‐water
marginal
sea
on
critical
path
eutrophication
and
environmental
degradation.
To
better
understand
metabolism‐induced
summertime
dissolved
oxygen
(DO)
decline
acidification,
eight
field
surveys
were
conducted
between
August
2011
September
2017,
investigating
seasonal
interannual
variations
DO
carbonate
system
parameters
central
Sea.
historically
lowest
was
recorded
at
66
μmol
O
2
/kg
subsurface
waters
early
2015.
By
comparing
our
data
set
with
literature
obtained
1980s,
1990s,
2000s,
emergence
history
hypoxia
this
shown.
Associated
shortage,
metabolism‐enhanced
CO
accumulation
summer
resulted
aragonite
saturation
states
close
or
even
less
than
1.5,
threatening
calcifiers
potentially
severe
consequences
for
valuable
shellfish
fisheries.
Based
model
results
combining
aerobic
respiration
(as
indicated
by
apparent
utilization)
given
wintertime/springtime
atmospheric
level
time,
study
suggests
that
combined
stresses
shortage
acidification
capable
ecosystems
could
develop
within
decades.
Environmental Science & Technology,
Год журнала:
2022,
Номер
56(15), С. 10681 - 10690
Опубликована: Июль 15, 2022
Stress
from
mixtures
of
synthetic
chemicals
is
among
the
key
issues
that
have
significant
adverse
impacts
on
marine
ecosystems.
A
robust
screening
workflow
integrating
toxicological-based
ranking
schemes
still
deficient
for
comprehensive
investigation
main
constituents
in
chemical
contribute
to
ecological
risks.
In
this
study,
presence
and
compositions
a
collection
priority
pollutants
were
monitored
by
suspect
analysis
seawater
estuarine
water
samples
semiclosed
Bohai
Sea.
total,
108
organic
nine
use
categories
identified.
Pesticides,
intermediates,
plastic
additives,
per-
polyfluoroalkyl
substances
extensively
detected
groups.
Varied
distribution
patterns
illustrated
intuitively
distinctive
sampling
areas
hierarchical
cluster
analysis,
which
mainly
influenced
run-off
inputs,
ocean
currents,
history.
Ecological
risks
with
quantified
residue
levels
first
assessed
toxicity-weighted
concentration
scheme,
pentachlorophenol
was
found
as
contributor
investigating
areas.
By
optimization
multiple
alternative
variables
(e.g.,
instrumental
response
detection
frequency),
extended
all
identified
plausible
under
toxicological
index
framework.
Similarity
endpoints
prioritized
could
further
been
screened
ToxAlerts.
Aromatic
amine
highlighted
most
frequently
structural
alert
(SA)
genotoxic
carcinogenicity
mutagenicity.
These
findings
fully
demonstrate
rationality
integrated
into
profiling
contamination
characteristics,
assessing
risk
potentials,
prioritizing
SAs.
