Environmental Research Letters,
Journal Year:
2021,
Volume and Issue:
16(11), P. 115011 - 115011
Published: Oct. 5, 2021
Abstract
Animals
can
impact
freshwater
ecosystem
structure
and
function
in
ways
that
persist
well
beyond
the
animal’s
active
presence.
These
legacy
effects
last
for
months,
even
decades,
often
increase
spatial
temporal
heterogeneity
within
a
system.
Herein,
we
review
examples
of
structural,
biogeochemical,
trophic
legacies
from
animals
stream
river
ecosystems
with
focus
on
large
vertebrates.
We
examine
how
decline
or
disappearance
many
native
animal
populations
has
led
to
loss
their
effects.
also
demonstrate
anthropogenically
altered
populations,
such
as
livestock
invasive
species,
provide
new
may
partially
replace
lost
legacies.
However,
these
have
important
functional
differences,
including
stronger,
more
widespread
homogenizing
Understanding
influence
is
particularly
continue
disappear
ecosystems,
because
they
illustrate
long-term
unanticipated
consequences
biodiversity
loss.
encourage
conservation
restoration
species
ensure
both
support
ecosystems.
Oryx,
Journal Year:
2019,
Volume and Issue:
55(1), P. 105 - 113
Published: Dec. 20, 2019
Abstract
Introduced
species
can
have
strong
ecological,
social
and
economic
effects
on
their
non-native
environment.
Introductions
of
megafaunal
are
rare
may
contribute
to
rewilding
efforts,
but
they
also
pronounced
socio-ecological
because
scale
influence.
A
recent
introduction
the
hippopotamus
Hippopotamus
amphibius
into
Colombia
is
a
novel
megaherbivore
onto
new
continent,
raises
questions
about
future
dynamics
system
which
it
has
been
introduced.
Here
we
synthesize
current
knowledge
Colombian
population,
review
literature
predict
potential
ecological
socio-economic
this
introduction,
make
recommendations
for
study.
Hippopotamuses
high
population
growth
rates
(7–11%)
and,
trajectory,
there
could
be
400–800
individuals
in
by
2050.
The
an
ecosystem
engineer
that
profound
terrestrial
aquatic
environments
therefore
affect
native
biodiversity
Magdalena
River
basin.
aggressive
pose
threat
many
inhabitants
region
who
rely
upon
livelihoods,
although
provide
benefits
through
tourism.
Further
research
needed
quantify
size
distribution
likely
effects.
This
must
balanced
with
consideration
cultural
concerns
develop
appropriate
management
strategies
introduction.
Journal of Geophysical Research Biogeosciences,
Journal Year:
2023,
Volume and Issue:
128(4)
Published: April 1, 2023
Abstract
Beaver
ponds
are
increasingly
promoted
as
a
strategy
for
physical
stream
restoration,
and
more
recently
recognized
natural
solutions
excess
nonpoint
source
pollutants,
such
nitrogen
(N).
facilitate
N
transformations
on
the
streamscape
by
increasing
sediment‐water
interactions
creating
low
high
redox
conditions
in
close
proximity.
Because
beaver
vary
widely
their
geomorphology,
spatial
extent
of
morphological
units
should
dictate
degree
biogeochemical
processing.
We
explore
role
pond
geomorphic
facilitating
sediment
using
mass
balance
approach.
quantified
input,
output,
transformation
species
within
sediments
water
riffle,
backwater,
margin
Northern
Utah.
Our
interpretations
were
supplemented
oxygen
demand
(SOD)
C
stable
isotopes.
The
backwater
performed
most
work,
including
increased
sedimentation
(2.1
g
m
−2
d
−1
),
ammonification
(1.3
nitrification
(0.07
denitrification
(0.1
2
latter
facilitated
OM
(14%)
SOD
(−0.95
±
0.2
O
).
Backwater
isotopes,
supported
flux
measurements,
indicated
benthic
microbial
activity
denitrification.
surface
had
C:N
ratios,
indicating
input
from
autochthonous
production.
These
findings
suggest
representation
may
predict
whether
can
removal
through
sequestration
Environmental Research Letters,
Journal Year:
2021,
Volume and Issue:
16(11), P. 115011 - 115011
Published: Oct. 5, 2021
Abstract
Animals
can
impact
freshwater
ecosystem
structure
and
function
in
ways
that
persist
well
beyond
the
animal’s
active
presence.
These
legacy
effects
last
for
months,
even
decades,
often
increase
spatial
temporal
heterogeneity
within
a
system.
Herein,
we
review
examples
of
structural,
biogeochemical,
trophic
legacies
from
animals
stream
river
ecosystems
with
focus
on
large
vertebrates.
We
examine
how
decline
or
disappearance
many
native
animal
populations
has
led
to
loss
their
effects.
also
demonstrate
anthropogenically
altered
populations,
such
as
livestock
invasive
species,
provide
new
may
partially
replace
lost
legacies.
However,
these
have
important
functional
differences,
including
stronger,
more
widespread
homogenizing
Understanding
influence
is
particularly
continue
disappear
ecosystems,
because
they
illustrate
long-term
unanticipated
consequences
biodiversity
loss.
encourage
conservation
restoration
species
ensure
both
support
ecosystems.
