Anaerobic
oxidation
of
methane
(AOM)
coupled
with
sulfate
reduction
(SR)
is
an
important
process
in
cold-seep
ecosystems
to
prevent
emitted
from
the
seafloor
atmosphere.However,
how
temperature
and
seep
habitats
drive
SR-AOM
further
affect
cycles
remains
unknown.We
simulated
habitat
differences
using
a
high-pressure
bioreactor
system
fed-batch
mode
for
vitro
incubation
sediment.We
found
that
was
significantly
affected
by
increased
(15°C).The
AOM
activity
supply
(+15
mM),
even
at
low
(8°C).Our
findings
provide
new
insight
into
budget
cold
seeps.
Wetlands,
Journal Year:
2023,
Volume and Issue:
43(8)
Published: Nov. 28, 2023
Abstract
Wetlands
cover
a
small
portion
of
the
world,
but
have
disproportionate
influence
on
global
carbon
(C)
sequestration,
dioxide
and
methane
emissions,
aquatic
C
fluxes.
However,
underlying
biogeochemical
processes
that
affect
wetland
pools
fluxes
are
complex
dynamic,
making
measurements
challenging.
Over
decades
research,
many
observational,
experimental,
analytical
approaches
been
developed
to
understand
quantify
C.
Sampling
range
in
their
representation
from
short
long
timeframes
local
landscape
spatial
scales.
This
review
summarizes
common
cutting-edge
methodological
for
quantifying
We
first
define
each
major
provide
rationale
importance
dynamics.
For
approach,
we
clarify
what
component
is
measured
its
temporal
representativeness
constraints.
describe
practical
considerations
such
as
where
when
an
approach
typically
used,
who
can
conduct
(expertise,
training
requirements),
how
conducted,
including
equipment
complexity
costs.
Finally,
key
covariates
ancillary
enhance
interpretation
findings
facilitate
model
development.
The
protocols
measure
soil,
water,
vegetation,
gases
also
relevant
related
disciplines
ecology.
Improved
quality
consistency
data
collection
reporting
across
studies
will
help
reduce
uncertainties
develop
management
strategies
use
wetlands
nature-based
climate
solutions.
Atmosphere,
Journal Year:
2025,
Volume and Issue:
16(4), P. 406 - 406
Published: March 31, 2025
Earth’s
atmospheric
methane
(CH4)
concentration
has
risen
more
than
162%
since
pre-industrial
levels
in
the
mid-18th
century,
and
about
30%
of
rise
global
temperatures
era
is
due
to
CH4
The
build-up
atmosphere
2020–2022
was
largest
systematic
measurements
started
1983,
double
average
yearly
growth
rate
measured
over
previous
17
years
(15.2
ppb
yr−1
vs.
5.71
yr−1,
respectively).
During
2020,
with
a
14.81
level
broke
record
(which
set
1991),
it
broken
again
immediately
following
year,
an
increase
17.64
2021.
For
2022,
final
estimate
13.25
fourth
annual
rate.
most
recent
explanations
for
this
surge
tropospheric
include
increased
emissions
from
tropical
wetlands,
floods,
temperatures.
2020
part
2021,
reduction
oxidative
capacity
COVID-19
lockdowns
also
proposed.
Our
main
hypothesis
that
2020–2021
may
be
caused
by
reduced
sulfate
emissions,
which
have
been
shown
decrease
methanotrophy
methanogenesis
rates
wetlands.
Then,
slowdown
2022–2024,
our
hypotheses
are
wetlands
remained
high,
but
there
even
higher
multiple
other
parameters
detailed
article.
This
perspective
review
paper
mainly
qualitative;
demonstrates
coupled
climate–chemistry
models
will
need
integrate
biochemistry,
as
evolution
composition
multifactorial
non-linear.
Science Advances,
Journal Year:
2025,
Volume and Issue:
11(17)
Published: April 23, 2025
Anaerobic
methane
oxidation
(AMO)
is
a
key
microbial
pathway
that
mitigates
emissions
in
coastal
wetlands,
but
the
response
of
AMO
to
changing
global
climate
remains
poorly
understood.
Here,
we
assessed
change
brackish
wetland
using
5-year
field
manipulation
warming
and
elevated
carbon
dioxide
(
e
CO
2
).
Sulfate
(SO
4
2−
)–dependent
(S-DAMO)
was
predominant
process
at
our
study
site
due
tidal
inputs
SO
.
However,
dynamics
responded
differently
treatments;
reduced
concentration
by
enhancing
reduction,
while
increased
regeneration.
S-DAMO
rates
mirrored
these
trends,
with
decreasing
stimulating
them.
These
findings
underscore
potential
alter
soil
activities
through
dynamics,
highlighting
need
incorporate
processes
predictive
models
for
more
accurate
representations
dynamics.
Environmental Microbiology,
Journal Year:
2023,
Volume and Issue:
25(12), P. 3104 - 3115
Published: Sept. 7, 2023
Anthropogenic
activities
are
influencing
aquatic
environments
through
increased
chemical
pollution
and
thus
greatly
affecting
the
biogeochemical
cycling
of
elements.
This
has
greenhouse
gas
emissions,
particularly
methane,
from
lakes,
wetlands,
canals.
Most
methane
produced
in
anoxic
sediments
is
converted
into
carbon
dioxide
by
methanotrophs
before
it
reaches
atmosphere.
Anaerobic
oxidation
requires
an
electron
acceptor
such
as
sulphate,
nitrate,
or
metal
oxides.
Here,
we
explore
anaerobic
methanotrophy
three
urban
canals
Amsterdam,
covering
a
gradient
freshwater
to
brackish
conditions.
Biogeochemical
analysis
showed
presence
shallow
sulphate-methane
transition
zone
most
canal,
suggesting
that
sulphate
could
be
relevant
for
this
setting.
However,
sediment
incubations
amended
with
iron
oxides
(ferrihydrite)
did
not
lead
detectable
rates
methanotrophy.
Despite
known
nitrate-dependent
(Methanoperedenaceae),
no
nitrate-driven
was
observed
any
investigated
either.
Interestingly,
graphene
oxide
stimulated
canal
sediment,
possibly
catalysed
ANME-2a/b
clade.
We
propose
natural
organic
matter
serving
drives
sediments.
