Soil Biology and Biochemistry,
Journal Year:
2022,
Volume and Issue:
177, P. 108914 - 108914
Published: Dec. 12, 2022
Understanding
how
and
why
soil
microbial
communities
respond
to
temperature
changes
is
important
for
understanding
the
drivers
of
distribution
abundance.
Studying
microbe
responses
warming
often
made
difficult
by
concurrent
effects
on
vegetation
a
limited
number
levels
preventing
detection
non-linear
effects.
A
unique
area
in
Iceland,
where
temperatures
have
recently
increased
due
geothermic
activity,
created
stable
gradient
both
grassland
(dominated
Agrostis
capillaris)
forest
(Picea
sitchensis)
vegetation.
By
sampling
soils
which
had
been
subjected
four
years
elevation
(ambient
(MAT
5.2
°C)
+40
°C),
we
investigated
shape
response
bacterial
warming,
their
associated
community
adaptation.
We
used
16S
rRNA
amplicon
sequencing
profile
communities,
growth-based
assays
(3H-Leu
incorporation)
characterize
adaptation
using
sensitivity
index
(SI,
log
(growth
at
40
°C/4
°C)).
Despite
highly
dissimilar
composition
between
forest,
they
adapted
similarly
warming.
SI
was
0.6
(equivalent
minimum
growth
−6
−7
control
plots.
Both
diversity
composition,
as
well
SI,
showed
similar
threshold
dynamics
along
gradient.
There
were
no
significant
up
6–9
°C
above
ambient,
beyond
all
indices
shifted
parallel,
with
increasing
from
1.5.
The
consistency
these
provide
evidence
an
role
direct
driver
shifts
gradients.
Geoderma,
Journal Year:
2023,
Volume and Issue:
441, P. 116736 - 116736
Published: Dec. 16, 2023
Soil
microbes
drive
soil
organic
carbon
(SOC)
mineralization.
Because
microbial
groups
differ
in
metabolic
efficiency
and
respond
differently
to
temperature
variation,
it
is
reasonable
expect
a
close
association
of
SOC
mineralization
its
sensitivity
(Q10
which
defined
as
the
factor
change
induced
by
10
°C
increase)
with
community
diversity
composition.
However,
these
relations
have
rarely
been
tested.
Here,
we
conducted
an
incubation
experiment
assess
responses
α
relative
abundance
r-
K-strategists
soils
from
wide
range
ecosystems
across
climate
gradient
southeast
Tibet.
The
results
indicated
that
instantaneous
are
significantly
(P
<
0.05)
influenced
temperature,
but
variables
poor
predictors
measured
at
same
time.
Rather,
fresh
showed
consistent
significant
effects
on
both
Q10
different
stages.
Importantly,
path
analysis
exerts
no
independent
when
variation
climate,
chemistry,
physical
protection,
edaphic
properties
accounted
for.
Together,
our
suggest
while
composition
strong
proxy
quality
availability,
they
not
fundamental
determinant
Q10.
Ecotoxicology and Environmental Safety,
Journal Year:
2022,
Volume and Issue:
242, P. 113932 - 113932
Published: July 30, 2022
Chemical
fertilization
in
excess
and
warming
disrupt
the
soil
microbes
alter
resource
stoichiometry,
particularly
intensive
vegetable
soils,
while
effects
of
these
variables
on
temperature
sensitivity
organic
carbon
(SOC)
decomposition
(Q10)
SOC
stability
remain
elusive.
Thus,
we
collected
six
long-term
soils
along
a
climatic
gradient
to
examine
microbial
mechanisms
stoichiometry
fluctuations
Q10
induced
by
from
soils.
Our
results
showed
that
was
dominated
regulated
stoichiometry.
Compared
cold
sites,
higher
observed
warm
accompanied
lower
enzyme
activities,
CUE,
C:N
ratio.
In
this
context,
reduced
as
evidenced
up
31.8%
greater
(1.45)
at
sites
than
(1.10)
owing
less
richness
communities
CUE.
The
relatively
pH
labile
C
value
restricted
development
richness,
decreased
C-
N-related
activities
ratio
resulted
CUE
reduction.
Additionally,
N
altered
imbalance
enhanced
exhibiting
an
increase
values,
great
importance
sites.
Collectively,
our
findings
emphasize
mechanism
predicting
variations
stability,
provide
theoretical
advice
improving
management
policies
context
