Proceedings of the National Academy of Sciences,
Journal Year:
2025,
Volume and Issue:
122(2)
Published: Jan. 9, 2025
Pesticide
application
is
essential
for
stabilizing
agricultural
production.
However,
the
effects
of
increasing
pesticide
diversity
on
soil
microbial
functions
remain
unclear,
particularly
under
varying
nitrogen
(N)
fertilizer
management
practices.
In
this
study,
we
investigated
stochasticity
microbes
and
multitrophic
networks
through
amplicon
sequencing,
assessed
community
related
to
carbon
(C),
N,
phosphorus
(P),
sulfur
(S)
cycling,
characterized
dominant
bacterial
life
history
strategies
via
metagenomics
along
a
gradient
two
N
addition
levels.
Our
findings
show
that
higher
enriches
abundance
specialists
opportunists
capable
degrading
or
resisting
pesticides,
reducing
proportion
generalists
in
absence
addition.
These
shifts
can
complicate
networks.
Under
increased
diversity,
selective
pressure
may
drive
bacteria
streamline
their
average
genome
size
conserve
energy
while
enhancing
C,
P,
S
metabolic
capacities,
thus
accelerating
nutrient
loss.
comparison,
was
found
reduce
niche
differentiation
at
mitigating
impacts
network
complexity
functional
traits
associated
with
ultimately
alleviating
results
reveal
contrasting
different
input
scenarios
emphasize
strategic
mitigate
ecological
use
systems.
PLoS ONE,
Journal Year:
2024,
Volume and Issue:
19(10), P. e0311781 - e0311781
Published: Oct. 10, 2024
Mixed
tree
plantations
containing
nitrogen
(N2)-fixing
species
have
the
potential
to
enhance
C
sequestration,
soil
biodiversity
and
forest
productivity.
Here,
we
investigated
impact
of
Acacia
mangium
Eucalyptus
urophilla
x
E.
grandis
mixed
in
Congolese
coastal
plains
on
mycobiota
community
structure
diversity
by
ITS
metabarcoding
sequencing
bioinformatic
analysis.
Higher
Faith's
phylogenetic
Evenness'
was
found
monoculture
relative
stands
Acacia.
Differences
beta
were
among
monoculture,
mixed-species
highlight
effects
plant
fungal
structure.
Ascomycota,
Basidiomycota
Rozellomycota
phyla
predominant
all
stands,
with
both
Dikarya
(Ascomycota
Basidiomycota)
accounting
for
more
than
70%
stands.
Correlation
analysis
revealed
that
sulfur
(S)
most
correlated
attribute
three
but
also
Mucoromycota
Calcarisporiellomycota
phyla,
although
mostly
negatively
(4
out
5).
Phosphorus
positively
attributes
(3
4)
twice,
negatively.
Distance-based
redundancy
a
positive
correlation
(p-value
=
0.0019,
contribution
22%)
phosphorus
0.0017,
19%)
mycobiota.
A
high
prevalence
generalists
(28%
38%)
specialists
(9%
24%)
different
sites.
In
(pure
species)
harbor
generalist
strategies
withstand
environmental
stresses
utilize
higher
number
resources
against
Stronger
between
main
taxa,
generalists'
lower
Evenness
reported
This
highlights
preserving
stability
following
disturbances
increasing
confirming
their
important
ecological
role
boosting
resilience
ecosystems
climate
land-use
(plant
as
shown
PCA
analysis)
changes.
Research Square (Research Square),
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 17, 2024
Abstract
Urbanization-induced
environmental
changes
are
becoming
a
major
threat
to
river
systems.
However,
little
is
known
about
how
urbanization
affects
aquatic
microbial
communities
despite
their
critical
role
in
maintaining
ecological
processes
and
nutrient
cycling.
Here,
we
investigated
assembly
of
habitat
generalists
specialists
different
stages
subtropical
rivers.
The
results
highlight
that
nitrogen
compounds
can
influence
the
composition
community.
Proteobacteria
Bacteroidetes,
as
well
Cyanobacteria
were
identified
dominant
phyla
Both
total
diversity
species
richness
significantly
higher
than
specialists,
while
beta
was
low-level
rivers
(LUS)
high-level
(HUS).
For
generalist,
heterogeneous
selection
most
important
process
for
HUS
winter,
but
dispersal
limitation,
drift
other
nondominated
mainly
establishment
LUS
whether
summer
or
winter.
Similarly,
stochastic
main
HUS,
In
winter
LUS,
more
complex
network
found
stronger
complexity
robustness
co-occurrence
compared
HUS.
Overall,
these
suggest
play
key
shaping
urbanization-induced
homogenization
communities.
insights
gained
from
this
study
may
be
helpful
understanding
mechanisms.
Frontiers in Microbiology,
Journal Year:
2024,
Volume and Issue:
15
Published: Sept. 9, 2024
Land
conversion
to
agriculture
is
an
important
factor
affecting
soil
ecological
processes
in
the
desert
grasslands
of
northern
China.
However,
fungal-community
structure
and
function
response
remain
unclear.
In
this
study,
grassland,
artificial
shrubland,
land
were
investigated
western
part
Mu
Us
Sandland
(Yanchi,
Ningxia;
Dingbian,
Shaanxi).
We
found
that
significantly
increased
total
carbon,
nitrogen,
phosphorus,
available
phosphorous
potassium
contents.
early
stage
agricultural
(April),
fungal
operational
taxonomic
units
abundance-based
coverage
estimator
lower
than
those
dessert
shrubland
plots
had
significant
correlations
with
pH,
electric
conductivity,
phosphorus
potassium.
The
dominant
phyla
strongly
correlated
physicochemical
properties.
Concomitantly,
relative
abundance
Glomeromycota
was
lower,
complexity
network
plots.
late
(September),
grassland
plots,
more
complex
relationships
compared
or
Symbiotrophic
groups,
a
functional
group
fungi,
can
be
used
as
predictor
environmental
change;
addition,
decreases
arbuscular
mycorrhizal
groups.
Our
study
highlights
communities
functions
human
disturbances
grasslands.
Considering
potential
influence
secondary
salinization,
there
need
for
continued
observation
health
over
time
continuum
agriculture.
