Authorea (Authorea),
Journal Year:
2023,
Volume and Issue:
unknown
Published: Dec. 10, 2023
Despite
the
growing
use
of
Aquatic
Ecosystem
Models
(AEMs)
for
lake
modelling,
there
is
currently
no
widely
applicable
framework
their
configuration,
calibration,
and
evaluation.
To
date,
calibration
generally
based
on
direct
data
comparison
observed
vs.
modelled
state
variables
using
standard
statistical
techniques,
however,
this
approach
may
not
give
a
complete
picture
model’s
ability
to
capture
system-scale
behaviour
that
prevalent
in
observations,
but
which
be
important
resource
management.
The
aim
study
compare
performance
‘naïve’
‘system-inspired’
new
augments
state-based
with
range
system-inspired
metrics
(e.g.
thermocline
depth,
metalimnetic
oxygen
minima),
an
effort
increase
coherence
between
simulated
natural
ecosystems.
This
was
achieved
by
applying
coupled
physical-biogeochemical
model
focal
site
simulate
temperature
dissolved
oxygen.
calibrated
according
modelling
convention,
formal
techniques.
There
clear
improvement
simulation
parameters
optimised
additional
metrics,
helped
focus
aspects
system
relevant
reservoir
management,
such
as
minima.
Extending
models
nutrient
cycling,
algal
blooms,
greenhouse
gas
emissions
has
potential
greatly
improve
prediction
complex
ecosystem
dynamics.
Frontiers in Marine Science,
Journal Year:
2023,
Volume and Issue:
10
Published: Oct. 3, 2023
The
need
to
implement
an
ecosystem-based
fisheries
management
(EBFM)
is
enshrined
in
numerous
regulations
and
strategies,
at
both
global
European
level.
In
practice,
it
challenging
EBFM
because
requires
a
complex
evaluation
of
interlinked
effects
environmental
climate
forcing
on
multi-species
interactions,
habitat
status
human
activities.
Ecosystem
models
are
one
the
most
critical
research
tools
inform
EBFM,
they
can
integrate
wide
variety
data,
examine
multiple
ecosystem
make
forecasts
based
specific
scenarios.
However,
despite
clear
progress
marine
modelling,
many
do
not
address
policy
goals
targets,
which
hinders
uptake
policy.
this
paper,
we
review
policies
implementing
bodies
directly
or
indirectly
have
repercussion
implementation
EBFM.
Moreover,
highlight
stakeholder
needs
related
waters,
could
help
address.
We
commitments
that
drive
these
concerns
raised
by
stakeholders
during
survey
dedicated
workshop.
Key
topics
concern
were
change;
bycatch;
protected
areas/fisheries
restricted
areas;
reducing
impacts
trawling.
Stakeholders
also
provided
questions
Scenario
data
results
visualizations,
as
well
barriers
using
for
decision-making
discussed.
A
close
involvement
scenario
development
designing
graphical
outputs
important,
overcome
some
main
hinder
scenarios,
including
lack
understanding
benefits
limits
models;
insufficient
interaction
with
stakeholders;
inadequate
characterization
uncertainties.
Ecological Informatics,
Journal Year:
2024,
Volume and Issue:
80, P. 102470 - 102470
Published: Jan. 14, 2024
Model
evaluation
is
a
crucial
process
in
model
development
and
quantified
metrics
play
pivotal
role
calibration
validation.
However,
current
water
quality
ecosystem
models,
conventional
are
derived
from
hydrological
models
often
overlook
the
non-normal
distribution
of
ecological
state
variables.
In
this
study,
we
proposed
series
that
consider
distributions
by
modifying
components
Kling-Gupta
efficiency.
Subsequently,
tested
existing
newly
using
four
different
synthetic
datasets
actual
simulation
case
total
phosphorus,
chlorophyll
a,
dissolved
oxygen
concentrations.
The
results
demonstrate
metric,
Fu-Zhang
efficiency,
which
replaces
ratio
standard
deviations
with
interquartile
ranges
to
measure
dispersion
similarity,
more
suitable
for
evaluating
lots
outliers
measurements.
Our
study
reveals
hidden
perils
integrated
calls
comprehensive
feasible
quantitative
frameworks
drive
next
paradigm
shift.
Water Resources Research,
Journal Year:
2024,
Volume and Issue:
60(8)
Published: Aug. 1, 2024
Abstract
Despite
the
growing
use
of
Aquatic
Ecosystem
Models
for
lake
modeling,
there
is
currently
no
widely
applicable
framework
their
configuration,
calibration,
and
evaluation.
Calibration
generally
based
on
direct
data
comparison
observed
versus
modeled
state
variables
using
standard
statistical
techniques,
however,
this
approach
may
not
give
a
complete
picture
model's
ability
to
capture
system‐scale
behavior
that
easily
perceivable
in
observations,
but
which
be
important
resource
management.
The
aim
study
compare
performance
“naïve”
calibration
“system‐inspired”
an
augments
state‐based
with
range
system‐inspired
metrics
(e.g.,
thermocline
depth,
metalimnetic
oxygen
minima),
increase
coherence
between
simulated
natural
ecosystems.
A
coupled
physical‐biogeochemical
model
was
applied
focal
site
simulate
two
key
state‐variables:
water
temperature
dissolved
oxygen.
calibrated
according
new
modeling
convention,
formal
techniques.
There
improvement
simulation
parameters
optimized
additional
metrics,
helped
reduce
uncertainty
predicting
aspects
system
relevant
reservoir
management,
such
as
occurrence
minima.
Extending
when
calibrating
models
has
potential
improve
fidelity
capturing
more
complex
ecosystem
dynamics.
Inland Waters,
Journal Year:
2023,
Volume and Issue:
13(4), P. 560 - 575
Published: Oct. 2, 2023
Within
freshwater
networks,
lakes
and
reservoirs
are
reactors
that
modify
nutrient
dynamics.
Their
functioning
is
based
on
an
interplay
of
hydrological
biogeochemical
processes,
rendering
them
vulnerable
to
climate
change.
Future
changes
in
catchment
characteristics
likely
alter
the
timing
magnitude
concentrations
discharge.
This
study
investigated
impact
changing
variability
lake
reservoir
We
examined
intraannual
retention
analyzed
role
reconfiguring
nutrients.
Utilizing
1D
model
GOTM-WET,
we
simulated
processing
a
mesotrophic
reservoir.
Further,
performed
scenario
simulations
by
modifying
inflow
nitrogen
phosphorus
concentrations.
Our
findings
indicate
removed
∼4%
∼12%
total
(TN)
(TP),
respectively.
Particulate
fractions
were
retained
efficiently,
but
there
was
net
export
dissolved
organic
fractions.
Regarding
mixing
stratification
periods,
however,
observed
during
certain
years.
During
stratification,
outflow
concentration
remained
relatively
unchanged
for
TN
TP
compared
Conversely,
phosphate
nitrate
increased
because
in-lake
assimilation
influence
events.
With
increasing
decreased
removal
reservoir,
concentration.
By
evaluating
lake's
capacity
attenuate
inflows
under
altered
conditions,
opportunities
improve
monitoring
evaluate
potential
peaks
downstream
drinking
water
resources
ecosystems.
Regional
protection
plans
for
lake
waters
are
based
on
water
quality
targets,
typically
expressed
in
terms
of
total
phosphorus
(TP)
concentrations,
usually
the
depth-averaged
ones
at
spring
mixing
temperate
environments.
These
concentrations
commonly
used
lack
direct
estimations
to
determine
external
loading
through
Vollenweider-OECD
steady-state
empirical
models.
models
also
estimate
in-lake
following
hypothetical
load
reductions.
Such
approaches
have
several
limitations
and
often
given
inaccurate
results.
Process-based
coupled
ecological-hydrodynamic
offer
a
much
wider
perspective,
solving
many
these
issues.
However,
their
application
has
been
up
now
restricted
individual
lakes
due
calibration
effort
data
availability
burdens.
In
this
study,
we
developed
simplified
process-based
model
QWET
over
9
Northern
Italy,
making
use
ParSAC
automatic
tool
feeding
only
with
available
from
public
monitoring.
Models
were
calibrated
past
observations,
simulating
nutrient
reduction
scenarios
future
decades.
The
advantages
regional
planning
identified
practical
application,
determining
strengths
limits
employed
approach
different
features.
Obtained
results
analysed
considering
specific
case
study.
Ecology and Evolution,
Journal Year:
2024,
Volume and Issue:
14(8)
Published: Aug. 1, 2024
Abstract
Animals
occupying
higher
trophic
levels
can
have
disproportionately
large
influence
on
ecosystem
structure
and
functioning,
owning
to
intricate
behavioral
responses
their
environment,
but
the
effects
of
adaptations
aquatic
dynamics
are
underrepresented,
especially
in
model
studies.
Here,
we
explore
how
adaptive
behavior
fish
affect
aquatics
ecosystems.
We
frame
context
central
trade‐off
between
feeding
predation,
calculating
optimal
level
determined
by
ambient
food
availability
predation
risk.
To
whole‐ecosystem
consequences
behavior,
embed
our
within
Water
Ecosystems
Tool
(WET),
a
contemporary
end‐to‐end
model.
The
principle
optimality
provides
robust
mechanistic
framework
for
representing
animal
that
is
relevant
complex
models,
provide
stabilizing
effect
dynamics.
predicts
an
emergent
functional
response
similar
Holling
type
III,
with
richer
more
rigorous
theoretical
foundation.
show
works
stabilize
web
compared
control
no
changing
strength
underlying
has
profound
structure.
Furthermore,
demonstrate
including
allows
overall
realistic
system
environmental
perturbation
form
nutrient
enhancement.
discuss
structuring
real
ecosystems,
approaches
like
this
one
may
benefit
ecological
modeling.
Our
study
further
highlights
approach
based
concepts
from
ecology
be
successfully
implemented
operational
models
resulting
improved
descriptive
power.
