Ecological Indicators,
Journal Year:
2024,
Volume and Issue:
160, P. 111929 - 111929
Published: March 1, 2024
Climate
change
has
increased
the
frequency,
duration
and
intensity
of
heatwaves
in
Europe.
These
extreme
events
result
alterations
physical,
chemical,
biological
properties
lakes
that
may
synergistically
promote
cyanobacterial
dominance.
In
our
study
we
focused
on
blooms
distributed
over
a
longitudinal
gradient
Central
Europe
during
one
"top
ten
European
heat
waves"
summer
2015.
92
were
included
study,
located
across
three
climatic
subregions:
cool
northern
lakes,
situated
Lithuania,
temperate
Poland,
warm
Croatia.
The
objective
was
to
determine
if
biomass,
predominant
species,
cyanotoxin
concentration
differed,
south-north
gradient,
as
function
water
temperature,
total
phosphorus,
nitrogen.
Statistical
significance
observed
patterns
tested
using
Kruskal-Wallis
rank
sum
test
generalized
linear
model.
We
found
lowest
average
epilimnion
but
highest
biomass
northern,
'cool'
while
temperature
with
southern,
'warm'
lakes.
cyanotoxins
also
Total
phosphorus
nitrogen
correlated
significantly
some
species
(mainly
Planktothrix
agardhii),
regardless
latitude.
Only
(microcystins
anatoxin-a)
dominant
(P.
agardhii).
Our
results
emphasized
differences
weaves
impact
various
latitudes,
strongest
increase
toxic
high
latitudes.
On
other
hand,
nutrients
directly
enhanced
all
studied
latitudes
cyanobacteria
dominating
might
be
recognized
ecological
indicators
climate
change,
especially
north-eastern
part
Marine and Freshwater Research,
Journal Year:
2025,
Volume and Issue:
76(2)
Published: Jan. 29, 2025
Context
Dams
construction
appears
to
have
multi-dimensional
effects
on
the
river
environment,
and
it
especially
affects
thermal
condition
of
rivers.
Aims
The
objective
this
work
was
assess
downstream
responses
Charef
Dam
in
relation
water
flow
residence
time.
Methods
During
year
2012,
hydrological
parameters
upstream
dam
were
monitored.
Key
results
Salinity,
electrical
conductivity,
total
dissolved
solids
(TDS)
all
responded
similarly,
with
larger
magnitudes
waters
than
downstream,
whatever
season.
In
terms
flux,
retains
59
56%
incoming
TDS
fluxes
respectively.
Furthermore,
temperature
is
higher
that
83%
samples.
dry
season,
response
can
exceed
2°C
(downstream
cooling).
Conclusions
Despite
being
a
small
dam,
time
(2.3
years)
has
significant
effect
temperature.
Implications
These
changes
may
cause
physicochemical
biological
issues.
Restoration
practices
such
as
increasing
discharges
during
seasons
riparian
cover
restoration
could
mitigate
impacts
minimise
negative
effects.
Journal of Environmental Management,
Journal Year:
2025,
Volume and Issue:
383, P. 125189 - 125189
Published: April 22, 2025
Climate
change
influences
worldwide
freshwaters
with
the
most
prominent
effects
in
Arctic
and
Alpine
regions.
Environmental
management
proglacial
zones
underlain
by
permafrost
requires
understanding
of
hydrological
regimes
water
retention
patterns.
However,
there
is
limited
long-term
data
on
catchment-scale
freshwater
flow
for
ecosystems
within
continuous
zones.
Here,
we
characterized
hydrometeorological
controls
glacial-fluvio-lacustrine
regime
a
model
catchment
(SW
Svalbard)
to
inform
contingency
plans
regions
endangered
glacial-floods
landslides.
We
compiled
comprehensive
hydro-meteorological
dataset
between
2005
2019
from
larger
database
(1972-2019)
applied
bootstrapping,
random
forest,
multiple
regressions,
elucidate
relationships
drivers
(temperatures,
sunshine
duration,
precipitation)
intensity
flows.
The
hydrology
exhibits
strong
seasonality
pronounced
peak
June
July
controlled
precipitation
(R
=
0.56).
From
August
September,
low-to-intermediate
discharge
interactive
air
temperatures
0.71).
interaction
hydrometeorology
stronger
September
compared
July.
strongest
warming
trend
(1979-2019)
makes
this
period
particularly
relevant
regards
changes
environmental
permafrost-underlain
catchments.
Indeed,
our
northern
hemisphere
meta-analysis
(n
1975)
revealed
that
majority
glacial
floods
(51
%)
occurs
at
time.
argue
should
include
monitoring
surface
temperature,
snow
cover
enabling
establishment
stabilizing
infrastructure
sensitive
whenever
threshold
values
are
exceeded
(i.e.,
Tmin
>4
°C;
P
>
30
mm)
discharges
increase.
Journal of Hydrology and Hydromechanics,
Journal Year:
2020,
Volume and Issue:
68(3), P. 260 - 270
Published: Aug. 10, 2020
Abstract
Lake
Śniardwy
is
the
largest
among
more
than
7000
Polish
lakes.
So
far,
it
has
not
been
a
subject
of
detailed
investigations
concerning
long-term
changes
in
water
temperature
or
ice
regime.
A
considerable
change
thermal
and
conditions
observed
period
1972–2019.
Mean
annual
increased
by
0.44°C
dec
−1
on
average,
was
higher
an
increase
air
(0.33°C
).
In
monthly
cycle,
most
dynamic
occurred
April
(0.77°C
case
cover,
appeared
increasingly
later
(5.3
days
),
disappeared
earlier
(3.0
The
thickness
cover
also
decreased
(2.4
cm
Statistical
analysis
means
Pettitt
test
showed
that
critical
moment
for
transformations
regime
end
1980’s.
addition
to
obvious
relations
with
both
characteristics,
evidenced
occurrence
depended
wind
speed
snow
cover.
recorded
are
considered
unfavourable,
their
consequences
will
affect
course
physical,
chemical,
biological
processes
lake
Poland.
Ecological Indicators,
Journal Year:
2024,
Volume and Issue:
160, P. 111929 - 111929
Published: March 1, 2024
Climate
change
has
increased
the
frequency,
duration
and
intensity
of
heatwaves
in
Europe.
These
extreme
events
result
alterations
physical,
chemical,
biological
properties
lakes
that
may
synergistically
promote
cyanobacterial
dominance.
In
our
study
we
focused
on
blooms
distributed
over
a
longitudinal
gradient
Central
Europe
during
one
"top
ten
European
heat
waves"
summer
2015.
92
were
included
study,
located
across
three
climatic
subregions:
cool
northern
lakes,
situated
Lithuania,
temperate
Poland,
warm
Croatia.
The
objective
was
to
determine
if
biomass,
predominant
species,
cyanotoxin
concentration
differed,
south-north
gradient,
as
function
water
temperature,
total
phosphorus,
nitrogen.
Statistical
significance
observed
patterns
tested
using
Kruskal-Wallis
rank
sum
test
generalized
linear
model.
We
found
lowest
average
epilimnion
but
highest
biomass
northern,
'cool'
while
temperature
with
southern,
'warm'
lakes.
cyanotoxins
also
Total
phosphorus
nitrogen
correlated
significantly
some
species
(mainly
Planktothrix
agardhii),
regardless
latitude.
Only
(microcystins
anatoxin-a)
dominant
(P.
agardhii).
Our
results
emphasized
differences
weaves
impact
various
latitudes,
strongest
increase
toxic
high
latitudes.
On
other
hand,
nutrients
directly
enhanced
all
studied
latitudes
cyanobacteria
dominating
might
be
recognized
ecological
indicators
climate
change,
especially
north-eastern
part
