Journal of Shellfish Research,
Journal Year:
2023,
Volume and Issue:
42(3)
Published: Dec. 31, 2023
Before
collapsing,
bay
scallops
(Argopecten
irradians)
supported
commercial
fisheries
in
Florida
but,
following
decades
of
restoration
efforts
and
management
actions,
still
support
a
recreational
fishery.
Settlement
was
monitored
along
the
west
coast
from
1992
through
2018,
using
collector
traps.
The
primary
environmental
variables
retained
analyses
included
temperature,
salinity,
red
tide
concentration
(Karenia
brevis).
settlement
rate
generally
increased
for
first
days
trap
deployment,
then
leveled
off
or
declined.
peaked
when
average
water
temperatures
were
between
21°C
23°C
at
four
sites:
St.
Andrew
Bay,
Joseph
West
Coast,
Pine
Island
Sound,
indicative
fall
peak
spawning.
At
Tampa
Bay
Sarasota
sites,
around
16°C,
winter
most
highest
occurred
association
with
declines
temperature
10°C–15°C
during
fall,
smaller,
secondary
occurring
similar
increases
spring.
Warming
may
already
be
negatively
affecting
ability
subpopulations
to
synchronously
spawn,
unknown
impacts
population
dynamics.
all
declined
rapidly
salinity
fell
below
30
little
27,
approached
zero
approximately
20.
occurrence
K.
brevis
exceeding
10,000
cells/L
resulted
reduced
settlement.
In
core
populations
Coast
Steinhatchee,
uncommon,
resumed
blooms
abated.
For
sites
outside
population,
2–4
y
after
tides.
Recovery
these
noncore
probably
relies
on
exogenous
supply
larvae
core.
If
that
penetrate
region,
as
observed
2021,
become
more
severe,
frequent,
have
longer
durations,
entire
scallop
could
endangered.
Journal of Environmental Management,
Journal Year:
2025,
Volume and Issue:
375, P. 124362 - 124362
Published: Feb. 1, 2025
The
Caloosahatchee
Estuary
in
southwest
Florida,
USA,
is
regularly
subject
to
the
introduction
of
toxic
Microcystis
aeruginosa
blooms,
often
originating
from
eutrophic
Lake
Okeechobee
via
C-43
Canal.
focus
this
study
was
determine
responses
one
these
introduced
blooms
progressively
elevated
salinity
levels
as
bloom
water
mass
moved
through
estuary.
In
upper
estuary,
salinities
were
freshwater,
and
surface
large
colonies
M.
observed,
along
with
peak
microcystin
toxin
concentrations
up
107
μg
L-1,
all
particulate
fraction.
mid-estuary,
increased
2-6,
again
259
however,
significant
extracellular
also
observed
(i.e.,
17.8
L-1),
suggesting
a
level
osmotic
stress
on
aeruginosa.
lower
ranged
6
25
very
few
viable
but
0.5
L-1)
present
throughout
column.
It
noteworthy
that
average
total
column
+
extracellular)
remained
constant
movement
during
its
transit
revealing
negligible
rate
degradation
ten-day
transit.
results
provide
insights
into
changes
distribution
gradient,
which
has
implications
for
management
risks
ecosystem
human
health,
how
may
be
affected
by
releases
three
control
structures
Discharge
rates
play
major
roles
Canal-Caloosahatchee
ecosystem.
potential
discharge
regulation
are
discussed
perspectives
allochthonous
autochthonous
origin.
Water Resources Research,
Journal Year:
2024,
Volume and Issue:
60(3)
Published: March 1, 2024
Abstract
In
this
study,
we
characterized
the
impact
of
regulatory
water
releases
relative
to
watershed
inputs
on
quality
receiving
waters
identify
if
and
how
managed
could
be
scheduled
mitigate
nutrient
export
downstream
impairment.
We
specifically
investigated
freshwater
flow
partitioning
Caloosahatchee
River
Estuary
(CRE)
from
a
large
lake,
Lake
Okeechobee,
CRE's
upstream
watershed,
C‐43
basin,
in
southwest
Florida
(USA).
A
balance
was
developed
dominant
inflow
sources
(i.e.,
Okeechobee
vs.
inputs)
over
time.
From
balance,
analyses
historical
trends
were
performed
detect
changes
contributions
CRE.
Further,
seasonal
annual
concentration
variations
long‐term
concentration‐discharge
(C‐Q)
relationships
analyzed
better
understand
biogeochemical
hydrological
processes
system
relation
source.
Since
1966,
found
duration
magnitude
flows
basin
higher
than
those
releases.
However,
recent
increases
volume
proportion
coming
CRE
observed.
The
C‐Q
analysis
revealed
that
nitrate
ammonium
concentrations
responsive
discharge,
while
total
phosphorus
orthophosphate
chemostatic.
While
modifications
operation
schedule
potentially
inorganic
nitrogen
loading,
potential
is
limited
by
complex,
confounding
effects
surrounding
watersheds.
Ecological Informatics,
Journal Year:
2024,
Volume and Issue:
80, P. 102496 - 102496
Published: Jan. 23, 2024
Stormwater
runoff
is
a
significant
contributor
to
nutrient
pollution,
leading
water
quality
degradation
and
ecological
imbalances.
The
management
of
stormwater
pollution
faces
challenges
due
inadequate
assessment
tools
for
evaluating
loads
across
multiple
watersheds
at
the
state
level
absence
an
open-source
tool
that
can
comprehensively
assess
effectiveness
Best
Management
Practices
(BMPs)
in
removal
while
incorporating
environmental
justice
(EJ)
considerations.
To
address
these
challenges,
we
developed
innovative
online
statewide
identifies
areas
where
BMP
planning
needs
be
prioritized
disparities
resulting
from
high
pollutant
intersecting
with
disadvantaged
communities,
alongside
tracking
after
various
implementations.
In
doing
so,
estimated
including
total
phosphorus
(TP),
nitrogen
(TN),
biochemical
oxygen
demand
(BOD),
suspended
solids
(TSS)
urban
land
use
1378
HUC-12
Florida
using
EPA's
load
estimate
(PLET),
which
calculates
based
on
factors
such
as
use,
septic
systems
wastewater
discharge,
soil
characteristics,
precipitation.
integrate
implementation
EJ
considerations,
social
vulnerability
index
was
identify
tiers
sociodemographic
racial/ethnicity
metrics
(e.g.,
%
black,
Hispanic,
etc.)
socioeconomic
median
household
income,
educational
attainment,
etc.).
We
then
investigated
28
BMPs
reducing
post-BMP
each
watershed.
Hotspots
were
primarily
identified
coastal
areas,
residential
main
contributor.
Miami-Dade,
Broward,
Hillsborough
counties
had
highest
disparities.
addition,
central
southern
exhibited
disproportionate
exposure
communities
loads.
contributes
significantly
holistic
watershed
by
features
visualizing
distribution
watersheds,
identifying
quantifying
reductions
implementation.
This
research
promotes
equitable
outcomes
empowers
stakeholders
adopt
sustainable
inclusive
practices
improvement.
Frontiers in Ecology and Evolution,
Journal Year:
2023,
Volume and Issue:
11
Published: May 24, 2023
Introduction
Cultural
eutrophication
threatens
numerous
ecological
and
economical
resources
of
Florida’s
coastal
ecosystems,
such
as
beaches,
mangroves,
seagrasses.
In
April
2021,
an
infrastructure
failure
at
the
retired
Piney
Point
phosphorus
mining
retention
reservoir
garnered
national
attention,
814
million
liters
nutrient
rich
water
were
released
into
Tampa
Bay,
Florida
over
10
days.
The
release
nitrogen
phosphorus-rich
Bay
–
a
region
that
had
been
known
restoration
success
story
since
1990s
has
highlighted
potential
for
unexpected
challenges
management.
Methods
For
year
after
release,
we
sampled
bi-weekly
four
sites
to
monitor
changes
in
nutrients,
stable
isotopes,
phytoplankton
communities,
complemented
with
continuous
monitoring
by
multiparameter
sondes.
Our
data
complement
synthesis
efforts
regional
partners,
Sarasota
Estuary
Programs,
better
understand
effects
anthropogenic
nutrients
on
estuarine
health.
Results
Phytoplankton
community
structure
indicated
initial
diatom
bloom
dissipated
end
2021.
summer,
bay
was
dominated
Karenia
brevis
,
conditions
improving
fall.
To
determine
if
there
unique
carbon
(C)
(N)
signature
discharge
water,
isotope
values
(δ
13
C)
15
N)
analyzed
suspended
particulate
material
(SPM).
δ
N
SPM
−17.88‰
±
0.76,
which
is
exceptionally
low
relative
other
sources
region.
May
early
June
all
exhibited
decline
SPM,
suggesting
discharged
incorporated
event.
occurrence
very
reference
site,
Gulf
Coast
outside
indicates
some
transported
Bay.
Discussion
This
work
illustrates
need
comprehensive
management
strategies
assess
manage
full
range
consequences
associated
inputs
ecosystems.
Ongoing
anticipated
impacts
climate
change
increasing
tropical
storm
intensity,
temperatures,
rainfall,
sea
level
rise
will
exacerbate
this
need.
Journal of Environmental Management,
Journal Year:
2023,
Volume and Issue:
351, P. 119606 - 119606
Published: Dec. 10, 2023
Cyanobacterial
harmful
algal
blooms
(CHABs)
have
become
a
persistent
seasonal
problem
in
the
upper
San
Francisco
Estuary,
California
also
known
as
Sacramento-San
Joaquin
Delta
(Delta).
The
is
comprised
of
complex
network
open
water
bodies,
channels,
and
sloughs.
terminus
Stockton
Channel
an
area
identified
CHAB
"hotspot."
As
CHABs
increase
severity,
there
urgent
need
to
better
understand
drivers
identify
implement
mitigation
measures
that
can
be
used
estuarine
like
Delta.
We
investigated
quality
conditions
nutrient
dynamics
by
measuring
nutrients
column,
sediments,
pore
waters.
In
situ
addition
bioassay
experiments
were
assess
effects
enrichment
on
total
algal/cyanobacterial
growth
pigment
concentrations.
both
June
September,
relative
unamended
controls,
chlorophyll
cyanobacterial
concentrations
unaffected
additions;
hence,
study
showed
signs
classical
hypereutrophication,
with
ambient
nitrogen
phosphorus
present
excess
requirements.
A
bloom,
dominated
Microcystis
spp.
was
throughout
but
most
severe
at
shallowest
site
channel
terminus.
At
this
site,
created
allowed
for
prolonged
bloom
from
through
September.
While
targeted
reductions
are
recommended
long
term
mitigation,
shorter
timescale,
our
findings
suggest
physical/mechanical
controls
more
promising
alternative
approaches
reduce
severity
Channel.
