Environmental Sciences Europe,
Год журнала:
2024,
Номер
36(1)
Опубликована: Авг. 5, 2024
This
study
examines
seasonal
and
regional
trends
in
chlorophyll-a
concentrations
the
dynamics
of
nitrogen
(N)
phosphorus
(P)
32
fishponds
(resulting
150
pond-year
cases)
employed
for
fish
production.
Fishponds
have
a
poor
ecological
state,
requiring
further
insights
pond
management.
To
gain
those
insights,
monthly
data
on
environment
were
collected
over
growing
seasons
from
April
to
September
(up
14
years)
across
lowland
highland
regions
Czechia.
We
used
ratio
dissolved
inorganic
total
(DIN:TP)
investigate
patterns
N
P
limitations.
region
(below
199
m
above
sea
level,
a.s.l.)
predominantly
N-limited
(80%),
while
ponds
midland
(200–449
exhibited
limitation
at
beginning
season
(April–May)
by
end
(August–September;
90%
fishponds).
Highland
(above
450
showed
frequent
limitations,
especially
during
season.
Chlorophyll-a
varied
both
scales,
with
overall
phytoplankton
biomass
peak
31
ha
surface
area.
remained
stable
regardless
DIN:TP
but
increased
lower
its
end.
The
lowest
highest
decreased
altitude.
Seasonal
variations
nutrient
limitations
occur
fishponds.
Our
suggests
that
targeted
input
enhanced
monitoring
can
significantly
improve
fishpond
management
practices
ecosystem
stability.
Journal of Environmental Management,
Год журнала:
2024,
Номер
370, С. 122884 - 122884
Опубликована: Окт. 11, 2024
The
Water
Framework
Directive
(WFD)
sets
the
fundamental
structure
for
assessing
status
of
water
bodies
in
European
Union.
Its
implementation
is
currently
entering
its
fourth
six-year
cycle
assisted
by
a
total
38
guidance
documents.
principal
objective
to
ensure
good
surface
and
ground
waters.
functioning
WFD
based
on
detecting
impact
human
pressures
biological,
physico-chemical,
or
hydromorphological
parameters,
reducing
these
causal
through
program
measures
achieve
status.
Climate
change
can
exert
significant
influence
ecological
directly
altering
parameters
monitored,
pressure
interactions,
influencing
effectiveness
programs
measures.
Aquatic
systems
respond
holistically
climate
with
different
having
additive,
synergistic,
antagonistic
interactions.
challenge
how
adapt
framework
manage
aquatic
context
while
maintaining
focus
implementing
tackle
key
pressures.
This
paper
examines
potential
approaches,
including
reassignment
waterbody
type,
quantifying
portion
Ecological
Quality
Ratio
(EQR)
driven
change,
creating
an
assessment
module
climatic
responses.
overall
purpose
stimulate
discussion
explore
ways
incorporate
into
structure.
Ecological Indicators,
Год журнала:
2022,
Номер
142, С. 109293 - 109293
Опубликована: Авг. 12, 2022
Reducing
phosphorus
input
is
currently
the
main
lake
eutrophication
management
strategy,
but
algal
blooms
persist
in
many
lakes
despite
effective
abatement
measures.
This
study
analyzed
monitoring
data
across
70
Chinese
using
statistical
methods
to
reveal
spatiotemporal
characteristics
of
algae
production
efficiency
total
(ETP)
and
driving
factors
ETP
changes.
The
results
showed
that
ranged
from
0.01
1.87
2016
2018.
Spatially,
with
higher
values
were
concentrated
Yungui
Plateau
region
due
its
natural
conditions,
which
suitable
for
phytoplankton
growth.
Temporally,
July
October
than
other
months.
In
addition,
over
30%
exhibited
rising
values,
these
mainly
located
Eastern
Plain
region.
These
differences
reason
failure
control
based
on
a
universal
regression
equation
some
individual
lakes.
Nitrogen-limited
or
co-limited
also
found
Northeast
region,
it
was
confirmed
alkalinity
factor
affecting
growth
Qingzang
Our
indicate
TP
reduction
alone,
empirical
relationship
between
chlorophyll-a
TP,
insufficient
accurately
at
lake-specific
scale,
individualized
strategies
considering
variations
are
recommended.
Ecological Indicators,
Год журнала:
2023,
Номер
158, С. 111339 - 111339
Опубликована: Ноя. 30, 2023
In
recent
decades,
climate
change
has
significantly
affected
water
quality
and
algal
blooms
in
lakes
worldwide.
Studying
the
temporal
dynamics
patterns
of
production
efficiency
its
drivers
individual
is
useful
for
analyzing
evolutionary
trajectory
Chla-TP
changes,
identifying
main
controlling
factors
eutrophication
to
guide
lake
management.
this
study,
we
used
a
dataset
Lake
Gehu
(1986–2020)
analyze
ETP
variability
on
interannual
seasonal
time
scales
quantify
relative
impacts
contributions
nutrient
climatic
ETP.
The
results
showed
negative
correlation
relationship
appeared
years
with
very
high
effects
nutritional
at
different
were
quantified
using
generalized
additive
model.
that
total
phosphorus
(TP)
concentration
had
significant
effect
variation,
explaining
up
28.9
%.
At
intra-annual
scale,
variables
much
greater
than
concentration,
explanatory
was
ranked
as
temperature
>
wind
speed
rainfall
nitrogen
(TN).
Based
characteristics
variations,
TPa
50
μg/L,
33
20
μg/L
levels
0.2,
0.3,
0.5,
respectively.
This
research
highlights
significance
addition,
influenced
by
coupling
provides
criterion
establishing
threshold
lakes.
Environmental Sciences Europe,
Год журнала:
2024,
Номер
36(1)
Опубликована: Авг. 5, 2024
This
study
examines
seasonal
and
regional
trends
in
chlorophyll-a
concentrations
the
dynamics
of
nitrogen
(N)
phosphorus
(P)
32
fishponds
(resulting
150
pond-year
cases)
employed
for
fish
production.
Fishponds
have
a
poor
ecological
state,
requiring
further
insights
pond
management.
To
gain
those
insights,
monthly
data
on
environment
were
collected
over
growing
seasons
from
April
to
September
(up
14
years)
across
lowland
highland
regions
Czechia.
We
used
ratio
dissolved
inorganic
total
(DIN:TP)
investigate
patterns
N
P
limitations.
region
(below
199
m
above
sea
level,
a.s.l.)
predominantly
N-limited
(80%),
while
ponds
midland
(200–449
exhibited
limitation
at
beginning
season
(April–May)
by
end
(August–September;
90%
fishponds).
Highland
(above
450
showed
frequent
limitations,
especially
during
season.
Chlorophyll-a
varied
both
scales,
with
overall
phytoplankton
biomass
peak
31
ha
surface
area.
remained
stable
regardless
DIN:TP
but
increased
lower
its
end.
The
lowest
highest
decreased
altitude.
Seasonal
variations
nutrient
limitations
occur
fishponds.
Our
suggests
that
targeted
input
enhanced
monitoring
can
significantly
improve
fishpond
management
practices
ecosystem
stability.
