Ecohydrology,
Journal Year:
2025,
Volume and Issue:
18(3)
Published: April 1, 2025
ABSTRACT
Improved
management
of
small
headwater
streams
in
the
Cerrado
(Neotropical
Savanna)
biome
Brazil
is
necessary
given
significant
landscape
transformations
caused
by
anthropogenic
activities
recent
decades.
Thus,
we
aimed
to
determine
relative
influence
leading
natural
features
and
pressures
on
physical
habitat
structure
174
stream
sites
distributed
five
hydrological
units
across
Cerrado.
We
used
multivariate
statistical
analysis
at
four
different
spatial
extents
establish
likely
causal
relationships
between
explanatory
variables
14
response
variables.
At
extent,
explained
only
13%
variation
habitats,
but
no
variation.
On
other
hand,
within
units,
17–31%
variation,
0–27%.
Regarding
catchment
were
most
important
extent
hydrologic
riparian
local
also
units.
Overall,
terrain
drainage
drove
differences
Although
vegetation
cover
catchment,
zone,
site
usually
secondary
importance,
they
occurred
all
unit
models.
For
conserving
rehabilitating
streams,
it
essential
consider
connectivity
processes
from
levels
large
as
largely
independent
systems.
Ecology and Evolution,
Journal Year:
2025,
Volume and Issue:
15(4)
Published: April 1, 2025
ABSTRACT
Rivers
face
multiple
stressors
that
act
on
biodiversity.
In
view
of
global
environmental
changes,
river
modifications,
deforestation,
and
pollution,
their
natural
parts
are
highest
importance
in
maintaining
the
biodiversity
mollusks.
The
study
addresses
predictors
rare
mollusk
species,
as
they
serve
ecological
indicators
ecosystem
quality
drivers
pollution
agricultural,
urban,
forest
catchments.
Analyses
distribution
were
provided,
model
multivariate
canonical
correspondence
analysis
was
constructed.
pH
water
relatively
high,
indicating
alkaline
conditions,
whereas
conductivity
low,
no
salty
influences
basins.
revealed
occurrence
species
globally
threatened
(EN),
vulnerable
Europe
(VU),
least
concern
(LC),
or
legally
protected
Poland,
for
example,
Unio
crassus
,
Anodonta
cygnea
tumidus
.
Mollusks
showed
a
high
positive
association
with
13
reflected
variety
substrates,
parameters,
debris.
As
shown
by
CCA
results,
also
avoided
rivers
urban
results
provide
new
data
managing
areas,
specifics
easy
to
extrapolate
other
contexts.
freshwaters
has
decreased
dramatically,
placing
them
among
most
animals
Earth.
Overall,
this
highlights
complex
interactions
between
conditions
diversity.
Ecohydrology,
Journal Year:
2025,
Volume and Issue:
18(3)
Published: April 1, 2025
ABSTRACT
Improved
management
of
small
headwater
streams
in
the
Cerrado
(Neotropical
Savanna)
biome
Brazil
is
necessary
given
significant
landscape
transformations
caused
by
anthropogenic
activities
recent
decades.
Thus,
we
aimed
to
determine
relative
influence
leading
natural
features
and
pressures
on
physical
habitat
structure
174
stream
sites
distributed
five
hydrological
units
across
Cerrado.
We
used
multivariate
statistical
analysis
at
four
different
spatial
extents
establish
likely
causal
relationships
between
explanatory
variables
14
response
variables.
At
extent,
explained
only
13%
variation
habitats,
but
no
variation.
On
other
hand,
within
units,
17–31%
variation,
0–27%.
Regarding
catchment
were
most
important
extent
hydrologic
riparian
local
also
units.
Overall,
terrain
drainage
drove
differences
Although
vegetation
cover
catchment,
zone,
site
usually
secondary
importance,
they
occurred
all
unit
models.
For
conserving
rehabilitating
streams,
it
essential
consider
connectivity
processes
from
levels
large
as
largely
independent
systems.
