Authorea (Authorea),
Journal Year:
2023,
Volume and Issue:
unknown
Published: July 19, 2023
The
investigation
of
temporal
and
spatial
variations
in
land
use
within
coastal
cities
plays
a
crucial
role
facilitating
the
scientific
utilization
resources
these
areas.
In
our
study,
we
focused
on
regions
Jiangsu
as
designated
study
area,
aiming
to
analyze
patterns
dynamic
changes
paddy,
upland,
woodland,
grassland,
water
built-up
from
2000
2020.
outcomes
revealed
that
cultivated
dominated
research
encompassing
an
area
ranging
23,
352.8
24,
820.9
km
,
which
accounted
for
76.0%
80.8%
total
area.
most
prominent
observations
regarding
were
continuous
reduction
paddy
fields
upland
areas,
experienced
declines
1,
086.67
381.35
respectively.
Conversely,
areas
exhibited
increases
003.61
682.67
transfer
matrix
analysis
indicated
absolute
decrease
was
particularly
significant
during
2000-2020
period,
with
being
predominantly
converted
into
land.
Specifically,
conversion
amounted
1,315.13
846.64
respectively,
over
aforementioned
period.
Between
2005
2010,
48.61%
46.42%,
amounting
639.31
393.04
.
These
findings
underscore
ongoing
need
protection
cities.
Our
provides
theoretical
foundation
sustainable
management
PLoS ONE,
Journal Year:
2024,
Volume and Issue:
19(1), P. e0296715 - e0296715
Published: Jan. 31, 2024
Qatar’s
rapid
industrialization,
notably
in
its
capital
city
Doha,
has
spurred
a
surge
land
reclamation
projects,
leading
to
constriction
of
the
entrance
Doha
Bay.
By
reducing
and
deflecting
ocean
circulation,
projects
have
reduced
effective
dispersion
wastewater
introduced
into
bay
hence
degraded
water
quality.
Here,
we
assess
fluctuations
residence
time
across
three
distinct
eras
(1980,
2000,
2020)
gauge
impact
successive
developments.
To
do
this,
couple
multi-scale
model
SLIM
with
Lagrangian
for
within
Doha’s
coastal
area.
We
consider
different
topographies
shoreline
identify
which
artificial
structures
contributed
most
increase
time.
Our
findings
reveal
that
residual
circulation
Bay
was
predominantly
impacted
by
northern
developments
post-2000.
Between
1980
bay’s
saw
modest
rise,
about
one
day
on
average.
However,
this
followed
substantial
surge,
six
days
average,
between
2000
2020,
is
mostly
attributable
The
Pearl
mega
island
development.
Certain
regions
witnessed
tripling
Given
ongoing
population
expansion
along
coast,
it
anticipated
growth
will
persist,
thereby
exacerbating
accumulation
pollutants
bay.
suggest
offshore
can
exert
far-reaching,
non-local
impacts
quality,
need
be
properly
assessed
during
planning
stages
such
Frontiers in Marine Science,
Journal Year:
2022,
Volume and Issue:
9
Published: July 26, 2022
Eutrophication,
mainly
caused
by
the
oversupply
of
inorganic
nitrogen
and
phosphate,
has
increased
become
a
serious
environmental
problem
in
coastal
bays
Beibu
Gulf,
newly
developing
industry
port
South
China.
However,
sources
nitrate
are
poorly
understood
gulf.
In
this
study,
dual
isotopes
(δ
15
N-NO
3
-
δ
18
O-NO
)
ammonium
N-NH
4
+
were
measured
during
rainy
season
to
identify
elucidate
their
biogeochemical
processes
Xi
Bay,
semi-enclosed
bay
that
is
strongly
affected
human
activities
Gulf.
The
results
showed
high
dissolved
(DIN,
10.24-99.09
µmol
L
-1
was
observed
particularly
mouth.
concentrations
DIN
1.5
times
higher
than
Qinzhou
Bay
1.7
Tieshangang
which
influenced
intensive
(i.e.,
industrial
activities).
addition,
lower
values
upper
bay,
suggesting
microbial
nitrification
occurs
dominant
source
(39%).
addition
nitrification,
external
sources,
including
sewage
manure
(33%),
soil
N
(15%)
fertilizer
(11%),
contributed
nutrients
bay.
severe
pollution
led
weaker
impact
biological
on
isotopic
fractionation,
although
Chl
level
(average
7.47
µg
found
region.
heavy
originated
from
(54%),
followed
(26%)
(17%).
contribution
atmospheric
deposition
relatively
low
(<3%).
This
study
suggests
have
little
under
pollution,
an
ideal
proxy
for
tracing
sources.
Frontiers in Marine Science,
Journal Year:
2023,
Volume and Issue:
10
Published: March 9, 2023
Introduction
Major
bays
worldwide
have
been
disturbed
by
human
pressures
to
varying
degrees
in
recent
years,
resulting
many
ecological
and
environmental
issues.
Maintaining
the
health
of
bay
ecosystem
has
national
international
significances,
as
it
enhances
regulation
function
resource
development
value
region.
This
study
aims
examine
evolution
trend
regulatory
mechanism
Laizhou
Bay
(LZB),
China.
Methods
A
comprehensive
DPSIR-based
indicator
framework
is
established,
comprising
40
representative
indicators
natural
environment
status,
service
function,
social
values
LZB
ecosystem.
The
subjective
objective
integrated
weighting
method
applied
determine
weight.
Ecosystem
Health
Index
then
calculated
assess
from
1980
2019
key
influencing
factors
are
identified
through
scenario
analysis.
Results
results
show
that
status
fluctuated
increased
overall
over
past
with
a
fairly
healthy
state
1980s,
an
unhealthy
2005,
rebound
subhealthy
state.
affecting
mostly
pressure
items,
land-based
pollution,
particularly
agricultural
non-point
source
having
more
significant
impact
than
reclamations.
Discussion
Reasonable
recommendations
finally
put
forward
on
improving
area,
including
refining
legislation
related
regional
management,
building
coordinated
land-sea
governance
system
exploring
new
technologies
for
marine
management.
fills
knowledge
gap
assessment
entire
such
long-time
scale,
research
outcomes
expected
provide
scientific
references
guidance
decision-making
social-economic
sustainable
other
bays.
Heliyon,
Journal Year:
2023,
Volume and Issue:
9(9), P. e19508 - e19508
Published: Sept. 1, 2023
This
study
aimed
to
investigate
the
impact
of
anthropogenic
stressors
(landfilling,
navigation
for
transport
goods,
cooling
in
fossil
fuel,
urbanization,
industrial
expansion,
agriculture
activities,
and
recreational
activities)
on
environmental
variables,
microbiological
quality,
sediment
properties
using
benthic
macroinvertebrates
as
a
bioindicator
within
Lagos
Lagoon,
Nigeria.
Four
(4)
sampling
stations
were
established
with
respect
their
importance/anthropogenic
activities
Lagoon.
Surface
water,
bottom
substrates,
macroinvertebrate
fauna
samples
collected
bimonthly
from
each
station
year
analyzed
appropriate
standard
methods
procedures.
The
highest
pH
range
7.96-8.01
(7.98
±
2.35)
was
recorded
at
Site
IV,
while
lowest
6.41-7.01
(6.15
1.14)
observed
II,
there
significant
difference
(p
<
0.05)
among
mean
values
across
sites.
High
salinity,
chloride,
sodium,
COD,
BOD,
manganese,
nickel,
cadmium,
nitrate
surface
water
physicochemical
parameters,
which
above
WHO
(2011)
permissible
limits,
high
concentrations
toxic
metals
(Pb,
Cr,
Zn,
Cd)
sediment.
A
total
26
species
during
this
study,
belongs
eight
(8)
classes.
Gastropoda
percentage
contribution
39.12%,
followed
by
polychaeta
accounting
30.34%,
malacostraca
contributed
2.63%.
abundance
I
(256
Indiv/m2),
IV
(252
least
II
(195
Indiv/m2).
Based
results
physico-chemical,
heavy
metals,
microbial
assemblage
obtained
revealed
adverse
effect
quality
degradation.
It
plays
role
distribution
diversity
an
aquatic
environment.
Frontiers in Marine Science,
Journal Year:
2023,
Volume and Issue:
10
Published: Feb. 10, 2023
Since
2000,
coastal
reclamation
projects
have
been
implemented
in
the
Guangxi
Beibu
Gulf
to
alleviate
shortage
of
land
resources.
As
a
result,
area
has
increased
significantly.
In
this
study,
based
on
Landsat
program,
we
tracked
waters
21st
century.
An
indicator
system
was
proposed
assess
driving
forces
synthetically.
Our
results
showed
that
98.6
km
2
reclaimed
from
1997
2017,
which
three
regions
underwent
great
changes:
Fangcheng
Bay,
Tieshan
and
Qiznhou
Bay.
Furthermore,
spatio-temporal
changes
were
affected
by
combination
population
growth,
economic
development,
marine
industry
development
cities.
These
provide
an
important
historical
reference
for
tracking
human
processes
Gulf,
also
offer
some
suggestions
rational
allocation
