Remote Sensing,
Journal Year:
2022,
Volume and Issue:
15(1), P. 157 - 157
Published: Dec. 27, 2022
The
green
tide
caused
by
Ulva
prolifera
(U.
prolifera)
is
becoming
more
severe
as
climate
change
and
human
activity
accelerate,
endangering
tourism,
aquaculture,
urban
landscapes
in
coastal
cities.
In
order
to
understand
the
spatio-temporal
distribution
of
U.
response
disaster,
this
study
used
Haiyang-1C
(HY-1C)
satellite
accompanied
Sentinel-2
GaoFen-1
(GF-1)
satellites
systematically
monitor
between
2020
2022.
consistency
HY-1C
satellites,
well
GF-1
was
first
investigated
determination
coefficients
(R2)
were
0.966
0.991,
respectively,
which
supports
feasibility
China’s
ocean
water
color
operational
satellite,
HY-1C,
for
monitoring.
Therefore,
studied
herein,
along
with
influence
range,
area,
drift
paths.
From
2022,
appeared
late
May
lasted
61,
88,
73
days.
Additionally,
area
continuously
decreased
while
it
generally
increased
then
2021.
It
an
interesting
phenomenon
that
when
maximum
occurred
at
early
stage
both
paths
tended
move
southward
after
traveling
northward.
overall
trend
path
2021
head
Thus,
dynamic
evolution,
helpful
promote
systematic
development
emergency
mechanisms
prolifera.
International Journal of Applied Earth Observation and Geoinformation,
Journal Year:
2023,
Volume and Issue:
116, P. 103173 - 103173
Published: Jan. 3, 2023
Since
the
first
report
in
2008,
macroalgal
blooms
of
Ulva
prolifera
(often
called
green
tides)
Yellow
Sea
have
occurred
every
year,
with
their
origins,
transport
pathways,
temporal
changes,
as
well
causes
and
consequences
studied
extensively.
Of
these
studies,
satellite
remote
sensing
has
been
used
widely
to
detect
bloom
presence
quantify
size
(i.e.,
U.
coverage
km2
or
biomass
kilotons).
However,
substantial
variability
found
refereed
literature
methodology,
results,
interpretation
coverage,
especially
attempts
study
inter-annual
changes
long-term
trends.
There
are
often
inconsistent
contradicting
results
even
from
same
sensor.
Such
inconsistencies
contradictions
create
difficulty
not
only
within
community
when
presenting
new
methodology
but
also
researchers
attempting
use
make
predictions
perform
impact
assessments.
Here,
we
review
on
blooms,
recommendations
based
physical
principles.
Specifically,
propose
following
conceptual
guidelines:
1)
a
reliable
index
algorithm
should
be
relatively
tolerant
perturbations
by
non-optimal
observing
conditions
(thick
aerosols,
thin
clouds,
moderate
sun
glint,
cloud-adjacent
straylight,
which
can
all
frequently
region)
for
presence/absence
detection,
small
errors
selected
thresholds
prolifera;
2)
it
easy
account
subpixel
through
pixel
unmixing)
order
obtain
an
accurate
estimate
total
image;
3)
data
product
maps)
able
variable
clouds
interpreting
spatial
patterns
uncertainty
estimates
provided
whenever
possible;
4)
both
minimize
manual
work
them
more
objective
repeatable
other
researchers.
Finally,
show
different
types
time
series
amounts
using
approaches
guidelines
Moderate
Resolution
Imaging
Spectroradiometer
(MODIS)
observations,
discuss
implications
annual
interdisciplinary
studies.
Geophysical Research Letters,
Journal Year:
2022,
Volume and Issue:
49(19)
Published: Sept. 17, 2022
Abstract
Blooms
of
various
types
seaweeds
have
been
reported
worldwide,
with
recent
expansions
in
surface
waters.
While
most
the
attributed
to
eutrophication
due
mainly
human
activities,
any
potential
role
climate
change
is
unclear.
Here
we
show
that,
East
China
Sea
and
Yellow
Sea,
increased
biomass
Sargassum
horneri
(
S.
horneri,
brown
seaweed)
from
2000
2021
appears
be
caused
primarily
by
ocean
warming,
as
prefers
a
certain
temperature
range
grow.
In
contrast,
while
increases
Ulva
prolifera
U.
prolifera,
green
same
regions
might
also
related
during
period,
activities
such
coastal
aquaculture
or
seaweed
mitigation
may
muddle
effects.
With
projected
warming
next
decades,
hypothesize
that
blooms
occur
earlier
year
continue
expand
future.
Journal of Sea Research,
Journal Year:
2023,
Volume and Issue:
193, P. 102375 - 102375
Published: March 21, 2023
Green
tide
with
the
main
dominant
species
is
Ulva
prolifera
O.F.
Müller
have
been
reported
in
Southern
Yellow
Sea
since
2007.
This
study
investigated
differences
morphology,
growth,
chlorophyll
fluorescence
parameters,
and
chloroplast
pigment
content
of
different
day-aged
U.
gametophytes.
Gametes
had
two
flagella
exhibited
positive
phototaxis.
On
7th
day
culture,
young
gametophytes
began
to
branch
out.
Changes
length
width
branches,
first-level
branches
showed
"S"-shaped
growth
within
0–30
days,
while
fresh
weight
single
algae
"J"-shaped
growth.
The
average
dry
was
12.32
1.38
g
per
thallus,
respectively,
when
cultured
from
one
gamete
30
days.
number
10-day-aged
thalli
119
blade,
maximum
branching
level
one.
30-day-aged
243
five.
Except
for
NPQ
IK
values
0
d
compared
10
thalli,
value
20
d,
NPQ,
ETRmax
Alpha
Fv
/
Fm,
YII,
ETRmax,
other
significant
or
extremely
differences.
There
no
difference
Chl
b
Car
between
Chla
significantly
different.
a,
b,
Car,
a
were
highly
These
results
not
only
verify
that
can
directly
develop
into
new
by
parthenogenesis,
but
also
reveal
morphological
physiological
characteristics
In
addition
presenting
typical
morphology
different-day-aged
gametophytes,
this
reports
contents
among
them.
revealed
mechanism
varying
rates
prolifera.
findings
provide
essential
reference
information
green
prevention
outbreak
research.
International Journal of Environmental Research and Public Health,
Journal Year:
2022,
Volume and Issue:
19(18), P. 11753 - 11753
Published: Sept. 17, 2022
A
massive
green
tide
occurred
in
the
Southern
Yellow
Sea
(SYS)
2021.
As
previous
years,
its
high
biomass
caused
trouble
to
coastal
environment
and
landscape
Unusually,
2021
was
unexpectedly
massive.
Thus,
field
surveys
remote
sensing
were
conducted
SYS
from
December
2020
July
Compared
pure
satellite
observations,
it
revealed
initial
development
of
more
clearly.
Given
effects
temperature
nutrient
changes
on
biomass,
we
compared
environmental
parameters
recent
years
found
no
significant
increase
concentrations
or
Relative
2020,
exhibited
a
wide
distribution,
prolonged
duration.
It
mainly
affected
by
(1)
reduced
implementation
source-control
measures
(2)
limited
Remote Sensing,
Journal Year:
2023,
Volume and Issue:
15(21), P. 5151 - 5151
Published: Oct. 27, 2023
In
recent
years,
the
frequent
outbreaks
of
Ulva
prolifera
in
South
Yellow
Sea
have
become
largest-scale
green
tide
disasters
world.
The
causes
its
garnered
widespread
attention,
particularly
coupled
effects
multiple
factors.
Leveraging
Google
Earth
Engine
(GEE)
platform,
this
study
conducted
a
long-term
investigation
disaster
and
factors
using
multi-source
satellite
imagery.
Finally,
combined
natural
environmental
changes
human
activities
on
were
analyzed
by
redundancy
analysis
(RDA)
variation
partitioning
(VPA).
results
indicate:
(1)
Since
2018,
scale
has
shown
distinct
“biennial”
trend.
(2)
Regarding
factors,
SST,
PAR,
precipitation,
windspeed
certain
growth
prolifera.
However,
they
cannot
be
considered
as
determining
for
outbreak
(0.002
<
R2
0.14).
anthropogenic
recycle
time
Pyropia
yezoensis
culture
rafts
relatively
minor
influence
extent
There
exists
positive
correlation
(R2
=
0.45)
between
footprint
index
(HFI)
Jiangsu
Province
annual
area
Sea.
(3)
outbreaks.
Ulvatotal
explanatory
power
windspeed,
HFI,
is
31.8%,
with
these
interweaving
mutually
influencing
each
other.
This
offers
important
insights
into
quantifying
driving
forces
behind
Sea,
providing
valuable
information
deeper
comprehension
complexity
marine
ecosystems
sustainable
management.
