Functional Ecology,
Journal Year:
2024,
Volume and Issue:
38(8), P. 1739 - 1750
Published: May 21, 2024
Abstract
Increasing
human
pressures
threaten
fish
diversity,
with
potentially
severe
but
unknown
consequences
for
the
functioning
of
riverine
food
webs.
Using
a
17‐year
dataset
from
multi‐trophic
communities,
we
investigated
long‐term
effects
pressure
on
diversity
and
web
functioning.
Combining
metabolic
scaling
ecological
network
principles,
calculate
annual
energy
fluxes
through
trophic
compartments
(top‐carnivore,
mesocarnivore,
detritivore
omnivore).
Energy
link
compartments,
thus
represents
functions
such
as
carnivory,
omnivory,
herbivory
detritivory.
Species
richness
across
all
was
positively
associated
flux.
However,
species
decreased
over
time,
did
flux
at
whole‐network
level,
which
reduced
by
75%.
Human
negatively
affected
both
Moreover,
negative
impacts
have
intensified
time.
Our
results
illustrate
how
can
reduce
erode
webs,
implications
ecosystem
Read
free
Plain
Language
Summary
this
article
Journal
blog.
Environmental Reviews,
Journal Year:
2023,
Volume and Issue:
32(3), P. 414 - 437
Published: Aug. 2, 2023
For
millennia
humans
have
extracted
biological
and
physical
resources
from
the
planet
to
sustain
societies
enable
development
of
technology
infrastructure.
Growth
in
human
population
changing
consumption
patterns
increased
footprint
on
ecosystems
their
biodiversity,
including
fresh
waters.
Freshwater
biodiversity
face
many
threats
it
is
now
widely
accepted
that
we
are
a
crisis.
One
means
protecting
restoring
freshwater
better
manage
exploitation
biota
aggregate
(e.g.,
sand,
gravel,
boulders).
Here
outline
arising
such
identify
response
options
ensure
methods
levels
extraction
sustainable
allow
recovery
over-exploited
ecosystems.
The
guidance
provide
will
practitioners,
policy-makers,
resource
stewards
embrace
effective,
sustainable,
evidence-based
approaches
extraction.
Response
for
managing
species
include
strengthening
assessment
reporting,
using
science-based
reduce
overexploitation
support
recovery,
embracing
community
engagement,
building
or
tightening
legislation.
reducing
demand
harvest,
governance,
monitoring
environmental
impacts,
promoting
restoration
degraded
compensating
losses.
Diverse
case
studies
highlight
examples
where
various
management
actions
been
implemented
an
effort
consider
how
they
can
be
scaled
up
adapted
other
contexts.
Managing
key
aspect
broader
initiatives
needed
protect
restore
around
globe.
Environmental Management,
Journal Year:
2024,
Volume and Issue:
74(6), P. 1037 - 1044
Published: June 21, 2024
We
review
the
negative
impacts
of
vinasse,
a
byproduct
alcohol
distillation,
on
Brazil's
freshwater
ecosystems.
found
total
37
pollution
events
between
years
1935
and
2023,
with
this
number
almost
certainly
an
underestimate
due
to
underreporting
and/or
unassessed
events.
Pollution
by
vinasse
occurred
both
through
accidents
(e.g.,
tank
failure)
deliberately
(i.e.,
opening
floodgates),
although
in
many
cases
causes
remain
undetermined.
All
caused
fish
kills,
some
records
reporting
effects
other
organisms
as
well
crustaceans
reptiles).
associated
effects,
was
reported
for
11
states,
notable
São
Paulo.
Most
biodiversity
were
recorded
rivers,
followed
streams
reservoirs.
Some
affected
river
systems
harbour
threatened
fishes.
Hydrological
connectivity
means
that
could
have
propagated
along
watercourses.
Given
these
consequences
biodiversity,
ecosystem
functioning
services,
we
recommend
remedial
actions.
River Research and Applications,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 9, 2025
ABSTRACT
The
unique
environmental
characteristics
of
the
tropics
and
subtropics,
including
precipitation
patterns,
photoperiods
temperatures,
can
influence
riverine
zooplankton
communities
in
contrasting
ways.
Therefore,
we
aimed
to
investigate
seasonal
dynamics
tropical
subtropical
rivers
compare
structure
response
distinct
climatic
conditions.
To
this
end,
collected
samples
from
located
two
different
zones
Brazil
(tropical
subtropical)
during
winter,
spring,
summer
autumn.
Our
results
showed
that
testate
amoebae
rotifers
play
a
crucial
role
both
zones,
emerging
as
predominant
groups
regarding
density,
species
richness
diversity.
In
rivers,
variations
are
strongly
influenced
by
temperature
flooding
events,
which
affect
total
suspended
solids,
turbidity
pH.
closely
linked
fluctuations
dissolved
oxygen.
We
identified
142
taxa,
with
zone
comprising
125
taxa
97
taxa.
also
revealed
had
greater
diversity
than
rivers.
This
disparity
was
primarily
attributed
higher
nutrient
concentrations
lower
thermal
amplitudes
waters
compared
those
waters.
Thus,
it
is
evident
conditions
have
varying
influences
on
dynamics,
highlighting
need
consider
regional
management
conservation
aquatic
ecosystems.
Neotropical Ichthyology,
Journal Year:
2025,
Volume and Issue:
23(1)
Published: Jan. 1, 2025
Abstract
Migratory
fishes
are
deeply
connected
with
human
societies.
In
the
Tocantins-Araguaia
basin,
a
region
marked
by
high
biodiversity,
endemism
and
environmental
degradation,
there
is
little
information
about
these
fishes.
this
scenario,
present
study
investigated
taxonomic
functional
diversity
of
potamodromous
fishes,
objective
to
compile
first
species
list,
examine
patterns
in
richness,
composition,
diversity.
The
migratory
status
each
was
assigned
based
on
most
recent
literature
fish
Amazon
basins.
consolidated
list
77
(three
orders,
12
families
41
genera),
including
eight
endemic,
three
threatened
two
non-native
species.
Pimelodidae
summed
species,
followed
Serrasalmidae
Curimatidae.
Most
were
classified
as
medium
(42)
long-distance
(32)
migrants,
few
carrying
out
continental
migrations
(3).
widely
distributed
resulting
spatial
variation
composition
However,
trait
varied
among
scale.
This
broad
assessment
focused
potential
generate
basic
support
fisheries
management,
planning,
conservation
initiatives.
NeoBiota,
Journal Year:
2025,
Volume and Issue:
97, P. 257 - 277
Published: Feb. 24, 2025
Freshwater
ecosystems
are
facing
mounting
challenges.
The
widespread
introduction
of
non-native
species,
for
example,
has
resulted
in
the
loss
native
species
and
substantial
reconfiguration
diversity
patterns
across
regions.
Documenting
such
impacts
remains
critical
informing
national-level
biosecurity
policies.
Here,
we
explore
changes
biogeographic
freshwater
fish
response
to
spread
teasing
apart
geographic
(watersheds)
taxonomic
(species)
drivers
at
global
scale.
We
leveraged
databases
occurrence
estimate
unique
contributions
local
watersheds
(native
origin)
beta-diversity
domains.
Beta-diversity
metrics
a
domain
scale
can
be
interpreted
as
their
importance
uniqueness
composition.
report
significant
with
largest
Ethiopian,
Nearctic
Palearctic
domains,
even
though
non-natives
decreased
contribution
all
particularly
known
impacts.
Watersheds
identified
most
important
promoting
were
not
evenly
distributed
influenced
by
geographical
isolation
compositions
composed
many
endemic
threatened
species.
Highest
values
enhancing
mainly
observed
although
mean
higher
non-threatened
Species
from
had
wide
ecological
tolerances,
were,
general,
natives,
endemics
and/or
IUCN
threat
status.
Our
findings
underscore
consequences
shaping
fishes
Anthropocene.