Water quality for bivalve molluscs and consumer safety: Application of novel and adapted multimetric indices in a coastal lagoon system exposed to wastewater discharges
Marine Pollution Bulletin,
Journal Year:
2025,
Volume and Issue:
214, P. 117814 - 117814
Published: March 17, 2025
Language: Английский
Nitrogen and phosphorus uptake kinetics in cultures of two novel picoplankton groups responsible for a recent bloom event in a subtropical estuary (Indian River Lagoon, Florida)
Frontiers in Marine Science,
Journal Year:
2024,
Volume and Issue:
11
Published: Jan. 25, 2024
Introduction
Successful
management
and
mitigation
of
harmful
algal
blooms
(HABs)
requires
an
in-depth
understanding
the
physiology
nutrient
utilization
organisms
responsible.
We
explored
preference
various
nitrogen
(N)
phosphorus
(P)
substrates
by
two
novel
groups
HAB-forming
phytoplankton
originating
from
Indian
River
Lagoon
(IRL),
Florida:
1)
a
consortium
picocyanobacteria
(
Crocosphaera
sp.
‘
Synechococcus’
sp.)
2)
ananochlorophyte
Picochlorum
sp.).
Methods
Short-term
kinetic
uptake
experiments
tested
use
affinity
for
inorganic
organic
N
(ammonium
(NH
4
+
),
nitrate
(NO
3
-
urea,
amino
acid
(AA)
mixture)
through
15
13
C
isotope
tracing
into
biomass.
Results
Picocyanobacteria
exhibited
Michaelis-Menten
type
AA
mixture
only,
while
nanochlorophytes
reached
saturation
NH
,
mixture,
urea
at
or
below
25
µM-N.
Both
nanochlorophyte
cultures
had
highest
(V
max
/K
s
)
followed
urea.
Neither
culture
showed
significant
isotopically-labeled
nitrate.
Disappearance
glucose-6-phosphate
(G6P)
added
to
medium
suggesting
P
both
was
confirmed
detection
alkaline
phosphatase
activity
C-G6P
Discussion
Together,
our
results
suggest
that
these
are
able
variety
sources
including
forms,
prefer
reduced
forms
N.
These
traits
likely
favorable
under
conditions
found
in
IRL
during
periods
competition
low
concentrations
nutrients.
Bloom-forming
therefore
subsist
on
recycled
typically
dominate
pools.
Language: Английский
Analysis of the Impact of Hydraulic Gates on a Stabilized Tidal Inlet Structure: Mathematical Model and Data Measurements
Hydrology,
Journal Year:
2024,
Volume and Issue:
11(4), P. 46 - 46
Published: March 29, 2024
Tidal
inlet
structures
are
engineering
projects
with
associated
benefits
related
to
flood
control,
water
quality
enhancement,
and
coastal
protection.
This
study
analyzes
the
performance
of
hydraulic
gates
on
a
stabilized
in
estuarine
systems
by
developing
simplified
model
that
considers
outlet
levels.
The
proposed
was
applied
tidal
structure
Cartagena
de
Indias,
Colombia.
offers
practical
tool
for
engineers
designers
operating
systems.
analysis
focuses
lagoon
Ciénaga
la
Virgen.
successfully
calibrated
using
two
sensors,
extreme
input
flow
rates
approximately
260
m3/s
110
m3/s,
respectively.
average
daily
output
volume
system
is
3,361,000
m3,
while
3,200,000
m3.
Consequently,
manipulation
opening
results
decrease
level,
potentially
as
much
25
cm,
which
local
authorities
can
use
make
decisions
reduce
levels
during
flooding
events.
Language: Английский