Microorganisms,
Journal Year:
2025,
Volume and Issue:
13(1), P. 56 - 56
Published: Jan. 1, 2025
Increasing
nitrogen
(N)
addition
induces
soil
nutrient
imbalances
and
is
recognized
as
a
major
regulator
of
microbial
communities.
However,
how
bacterial
abundance,
diversity,
community
composition
respond
to
exogenous
N
in
nutrient-poor
generally
N-limited
regions
remains
understudied.
In
this
study,
we
investigated
the
effects
short-term
additions
on
communities
using
quantitative
polymerase
chain
reaction
(PCR)
Illumina
Miseq
sequencing
an
situ
field
experiment.
The
results
showed
that
low
increased
observed
species
(Sobs)
community,
with
addition,
Sobs
bacteria
gradually
decreased,
especially
unique
OTUs.
relative
abundance
Proteobacteria,
Actinobacteria,
Gemmatimonadetes
increasing
whereas
Chloroflexi
Firmicutes
decreased.
Soil
properties
play
important
role
structure
at
phylum
or
genus
levels.
Short-term
proportion
nodes
from
Actinobacteria
Proteobacteria
co-occurrence
network
enhanced
stability
network.
may
constructing
Our
study
aims
explore
composition,
areas
caused
by
ecological
disturbances.
Biogeochemistry,
Journal Year:
2021,
Volume and Issue:
154(2), P. 211 - 229
Published: May 6, 2021
Soil
organic
nitrogen
(N)
is
a
critical
resource
for
plants
and
microbes,
but
the
processes
that
govern
its
cycle
are
not
well-described.
To
promote
holistic
understanding
of
soil
N
dynamics,
we
need
an
integrated
model
links
matter
(SOM)
cycling
to
bioavailable
in
both
unmanaged
managed
landscapes,
including
agroecosystems.
We
present
framework
unifies
recent
conceptual
advances
our
three
steps
cycling:
(ON)
depolymerization
solubilization;
sorption
desorption
on
mineral
surfaces;
microbial
ON
turnover
assimilation,
mineralization,
recycling
products.
Consideration
balance
between
these
provides
insight
into
sources,
sinks,
flux
rates
N.
By
accounting
interactions
among
biological,
physical,
chemical
controls
over
availability
complex
mechanisms
transformation
concrete
amenable
experimental
testing
translates
ideas
new
management
practices.
This
will
allow
researchers
practitioners
use
common
measurements
particulate
(POM)
mineral-associated
(MAOM)
design
strategic
N-cycle
interventions
optimize
ecosystem
productivity
minimize
environmental
loss.The
online
version
contains
supplementary
material
available
at
10.1007/s10533-021-00793-9.
Global Change Biology,
Journal Year:
2024,
Volume and Issue:
30(3)
Published: March 1, 2024
Abstract
Emerging
evidence
points
out
that
the
responses
of
soil
organic
carbon
(SOC)
to
nitrogen
(N)
addition
differ
along
profile,
highlighting
importance
synthesizing
results
from
different
layers.
Here,
using
a
global
meta‐analysis,
we
found
N
significantly
enhanced
topsoil
(0–30
cm)
SOC
by
3.7%
(±1.4%)
in
forests
and
grasslands.
In
contrast,
subsoil
(30–100
initially
increased
with
but
decreased
over
time.
The
model
selection
analysis
revealed
experimental
duration
vegetation
type
are
among
most
important
predictors
across
wide
range
climatic,
environmental,
edaphic
variables.
contrasting
indicate
considering
deep
layers,
particularly
for
long‐term
continuous
deposition.
Finally,
lack
depth‐dependent
modeling
frameworks
has
likely
resulted
overestimation
changes
storage
under
Global Change Biology,
Journal Year:
2023,
Volume and Issue:
29(15), P. 4412 - 4429
Published: June 5, 2023
Microbial
communities
in
soils
are
generally
considered
to
be
limited
by
carbon
(C),
which
could
a
crucial
control
for
basic
soil
functions
and
responses
of
microbial
heterotrophic
metabolism
climate
change.
However,
global
C
limitation
(MCL)
has
rarely
been
estimated
is
poorly
understood.
Here,
we
predicted
MCL,
defined
as
availability
substrate
relative
nitrogen
and/or
phosphorus
meet
metabolic
requirements,
based
on
the
thresholds
extracellular
enzyme
activity
across
847
sites
(2476
observations)
representing
natural
ecosystems.
Results
showed
that
only
about
22%
terrestrial
surface
show
community.
This
finding
challenges
conventional
hypothesis
ubiquitous
metabolism.
The
geographic
extent
our
study
was
mainly
attributed
plant
litter,
rather
than
organic
matter
processed
microbes,
serving
dominant
source
acquisition.
We
also
identified
significant
latitudinal
pattern
MCL
with
larger
at
mid-
high
latitudes,
whereas
this
absent
tropics.
Moreover,
significantly
constrained
rates
respiration,
suggesting
potentially
increase
respiration
latitudes
low
if
change
increases
primary
productivity
alleviates
higher
latitudes.
Our
provides
first
estimates
advancing
understanding
cycling
feedback
under
Frontiers in Microbiology,
Journal Year:
2024,
Volume and Issue:
15
Published: Sept. 13, 2024
Although
aboveground
biodiversity
has
been
extensively
studied,
the
impact
of
nutrient
enrichment
on
soil
microbial
populations
remains
unclear.
Soil
microorganisms
serve
as
important
indicators
in
shaping
cycling
processes
and
are
typically
sensitive
to
additions.
For
this,
we
employed
a
factorial
combination
design
examine
additions
composition
function
bacteria
temperate
steppe.
Nitrogen
addition
promoted
growth
copiotrophic
(Proteobacteria,
Firmicutes,
Bacteroidota)
but
inhibited
oligotrophic
(Acidobacteria,
Chloroflexi,
Verrucomicrobiota).
Phosphorus
alleviated
phosphorus
deficiency,
resulting
decrease
abundance
phoD-harboring
(Actinobacteria
Proteobacteria).
Significant
enhancement
bacterial
alpha
diversity
was
observed
only
treatments
with
added
phosphorus.
Changes
NO
