Water,
Год журнала:
2019,
Номер
11(10), С. 2025 - 2025
Опубликована: Сен. 28, 2019
Water
resources
are
threatened
by
many
pollution
sources.
The
harmful
effects
of
can
be
evaluated
through
biological
indicators
capable
tracing
problems
in
life
forms
caused
the
contaminants
discharged
into
streams.
In
present
study,
on
stream
water
quality
landscape
configuration,
season,
and
distance
from
contaminant
emissions
diffuse
point
sources
were
accessed
evaluation
a
Portuguese
macroinvertebrate
index
(IPtIN)
12
observation
points
distributed
within
studied
area
(Ave
River
Basin,
Portugal).
Partial
least-squares
path
models
(PLS-PMs)
used
to
set
up
cause–effect
relationships
between
this
index,
various
metrics
adapted
forest,
agriculture,
artificial
areas,
aforementioned
emissions,
considering
13
distances
ranging
100
m
56
km.
PLS-PM
applied
summer
winter
data
explore
seasonality
effects.
results
exposed
significant
scale
seasonal
areas
visible
for
larger
than
10
impact
agriculture
was
also
related,
but
influence
more
evident.
forested
could
hold
onto
contamination
mainly
periods.
stronger
during
summer,
when
short
distance.
effluent
discharges
small,
compared
metrics,
had
limited
statistical
significance.
Overall,
evidenced
land
use
at
km
or
scales,
regardless
season.
This
result
is
valid
catchment,
transposition
other
similar
catchments
needs
carefully
verified
given
limited,
though
available,
number
points.
Scientific Reports,
Год журнала:
2021,
Номер
11(1)
Опубликована: Апрель 8, 2021
Abstract
While
climate
change
severely
affects
some
aquatic
ecosystems,
it
may
also
interact
with
anthropogenic
factors
and
exacerbate
their
impact.
In
dry
climates,
dams
can
cause
hydrological
drought
during
periods
following
a
great
reduction
in
dam
water
discharge.
However,
impact
of
these
severe
droughts
on
lotic
fauna
is
poorly
documented,
despite
expected
to
increase
duration
intensity.
We
document
here
how
discharge
was
affected
by
variability
2011–2018
highly
modified
watershed
northeastern
Algeria,
an
endemic
endangered
damselfly,
Calopteryx
exul
Selys,
1853
(Odonata:
Calopterygidae),
responded
episodes.
Analysis
based
compilation
data
(temperature,
precipitation,
index),
management
(water
depth
volume
frequency),
survey
C.
occurrence,
capture–mark–recapture
(CMR)
adults.
The
study
period
characterized
between
2014
2017,
which
led
lowering
into
the
river,
associated
changes
chemistry,
particularly
2017
2018.
These
events
could
have
extirpation
several
populations
Seybouse
River
(Algeria).
CMR
surveys
showed
that
species
sensitive
fluctuations,
avoiding
low
high
levels
(drought
flooding).
shows
interacts
human
requirements
river
flow
regimes,
chemistry
fauna.
As
are
likely
future,
current
highlights
need
for
urgent
new
plans
habitats
maintain
this
possible
others.
Water,
Год журнала:
2019,
Номер
11(9), С. 1757 - 1757
Опубликована: Авг. 23, 2019
Riparian
vegetation
represents
a
protective
barrier
between
human
activities
installed
in
catchments
and
capable
of
generating
exporting
large
amounts
contaminants,
stream
water
that
is
expected
to
keep
quality
overtime.
This
study
explored
the
combined
effect
landscape
composition
buffer
strip
width
(L)
on
quality.
The
was
assessed
by
forest
(F)
agriculture
(A)
ratio
(F/A),
an
index
(IWQ)
expressed
as
function
physico-chemical
parameters.
(F/A
×
L)
quantified
multiple
regression
model
with
interaction
term.
carried
out
eight
Uberaba
River
Basin
Environmental
Protection
Area,
located
state
Minas
Gerais,
Brazil,
characterized
very
different
F/A
L
values.
results
related
improved
(larger
IWQ
values)
increasing
values
L,
which
were
not
surprising
given
abundant
similar
reports
widespread
scientific
literature.
But
enlightening.
reduced
range
required
sustain
at
fair
level
some
40%,
remarkable.
spatial
distribution
infiltration
capacity
within
studied
catchments.
high
should
comprise
larger
number
patches,
allowing
dominance
subsurface
flow
soil
layer,
condition
improves
probability
cross
interact
before
reaching
stream.
Conversely,
low
are
prone
generation
overland
network,
because
absence
permanent
substantially
reduces
patches.
network
channelizes
runoff
conveys
surface
into
specific
confluence
points
stream,
reducing
or
even
hampering
strip.
Notwithstanding
interaction,
calculated
ranges
(45–175
m)
much
than
maximum
imposed
Brazilian
Forest
Code
(30
m),
result
deserves
reflection.
Water,
Год журнала:
2020,
Номер
12(3), С. 623 - 623
Опубликована: Фев. 25, 2020
The
exploitation
of
natural
resources
has
grown
mainly
due
to
the
high
rate
population
growth
that
changed
over
time
around
planet.
Water
is
one
most
needed
essential
for
survival.
Despite
all
efforts
made
improve
water
security,
an
environmental
impact
related
anthropogenic
influence
remains
great
concern,
which
alteration
surface
and
groundwater
quality.
In
many
regions
world,
there
limited
or
no
access
rural
urban
supply
while
a
need
sanitation
facilities.
This
work
evaluated
spatial
distribution
quality
as
well
their
changes
in
wet
dry
seasons
tropical
climate
Atlantic
Forest
Biome.
study
area
under
influence,
municipality
Igarassú,
Pernambuco
State,
Brazil.
analysis
raw
was
based
on
Standard
Methods
Examination
Wastewater,
referenced
Brazilian
Ministry
Health
Consolidation
Ordinance
sets
standards
drinking
water.
temporal
analyses
indicated
variation
from
seasons,
whereas
results
revealed
deviations
Brazilian’s
Supply
Standards
some
physicochemical
parameters.
There
increase
values
parameters
during
season
hydrological
compartments.
anthropized
Biome
affecting
It
is,
therefore,
necessary
develop
policies
put
them
into
practice
by
implementing
engineering
projects
guarantee
proper
treatment
order
bring
back
good
status
this
region.
Environmental Science and Pollution Research,
Год журнала:
2021,
Номер
29(17), С. 25848 - 25857
Опубликована: Дек. 1, 2021
Metal
pollution
is
one
of
the
main
environmental
threats
in
freshwater
ecosystems.
Aquatic
animals
can
accumulate
these
substances
and
transfer
them
across
food
web,
posing
risks
for
both
predators
humans.
Accumulation
patterns
strongly
vary
depending
on
location,
species,
size
(which
fish
crayfish
related
to
age)
individuals.
Moreover,
high
metal
concentrations
negatively
affect
animals'
health.
To
assess
intraspecific
relationship
between
accumulation
health
(proxied
by
body
condition)
individuals,
concentration
14
metals
(Al,
As,
Cd,
Co,
Cr,
Cu,
Fe,
Hg,
Mg,
Mn,
Ni,
Pb,
Se,
Zn)
was
analyzed
six
alien
species
from
highly
anthropogenically
altered
Arno
River
(Central
Italy):
five
(Alburnus
alburnus,
Pseudorasbora
parva,
Lepomis
gibbosus,
Ictalurus
punctatus,
Silurus
glanis)
(Procambarus
clarkii).
We
found
that
P.
clarkii,
Cu
size,
as
well
Al
L.
gibbosus
Mg
adult
I.
punctatus.
Positive
size-dependent
relationships
were
Hg
Fe
S.
glanis,
Cr
juvenile
Only
Co
glanis
correlate
with
individual
Since
animal
tissue
depend
trade-offs
uptake
excretion,
few
significant
results
suggest
different
types
age
classes.
However,
only
predatory
(L.
presented
relationships,
suggesting
feeding
habits
are
primary
drivers
accumulation.
Applied Sciences,
Год журнала:
2021,
Номер
11(9), С. 3760 - 3760
Опубликована: Апрель 21, 2021
This
study
assessed
the
distribution
of
heavy
metals
in
gills,
kidney,
and
liver,
correlated
with
severity
histopathological
changes,
three
fish
species
different
feeding
habitats
(Barbus
barbus,
Squalius
cephalus,
Chondrostoma
nasus)
from
Crișul
Negru
river,
Romania.
The
levels
copper
(Cu),
chromium
(Cr),
cadmium
(Cd),
lead
(Pb),
zinc
(Zn)
tissues
were
measured
by
atomic
absorption
spectrophotometry.
Histopathology
expressions
TNF-α
proliferation
cell
nuclear
antigen
(PCNA)
investigated
immunohistochemistry
Western
blot.
Our
data
suggest
a
significant
correlation
between
bioconcentration
level
structural
changes.
carnivorous
was
most
affected
compared
to
omnivorous
herbivorous
ones,
organ
kidney.
Moreover,
tissue
damage
PCNA
expression
revealed
that
presented
less
extended
lesions,
likely
due
higher
activated
repair
mechanisms
lower
inflammation.
In
conclusion,
our
subsequent
statistical
analysis
behavior
could
be
alterations
might
used
for
more
profound
evaluation
aquatic
environment
safety
ecosystems.
