Frontiers in Microbiology,
Год журнала:
2022,
Номер
13
Опубликована: Ноя. 28, 2022
Forest
succession
is
a
central
ecological
topic,
due
to
the
importance
of
associated
dynamic
processes
for
terrestrial
ecosystems.
However,
very
little
currently
known
about
community
assembly
and
interaction
soil
microbial
communities
along
forest
successional
trajectories,
particularly
regarding
dynamics
in
contrasting
seasons.
To
bridge
these
knowledge
gaps,
we
studied
bacterial
fungal
compositions,
assemblages,
co-occurrence
networks
well-established
gradient
Phoebe
bournei-dominated
forest,
spanning
65
years
development
subtropical
region.
Illumina
MiSeq
sequencing
16S
ITS
genes
was
employed
assessment
composition
diversity,
respectively.
The
relative
abundance
α-diversity
bacteria
fungi
showed
differential
trend
over
succession.
dominant
phyla
(Basidiomycota
Ascomycota)
changed
more
frequently
than
(Proteobacteria,
Acidobacteriota,
Actinobacteriota),
indicating
that
have
sensitive
relationship
with
compared
bacteria.
variation
induced
by
significantly
affected
total
phosphorus,
dissolved
organic
carbon
content
pH.
Compared
deterministic
processes,
stochastic
mainly
dominated
communities.
Meanwhile,
stochasticity
increased
later
stages.
In
Particular,
dispersal
limitation
drift
accounted
large
proportion
assembly,
addition,
became
complex
as
proceeds.
Soil
exhibited
competition
cooperation
gradient.
Collectively,
our
findings
suggest
improves
complexity
interactions
forests,
providing
key
insights
into
between
Remote Sensing,
Год журнала:
2022,
Номер
14(10), С. 2351 - 2351
Опубликована: Май 12, 2022
There
are
significant
differences
in
the
dominant
driving
factors
of
rocky
desertification
evolution
different
historical
periods
southwest
karst
mountainous
areas.
However,
previous
studies
were
mostly
conducted
specific
periods.
In
this
study,
taking
Bijie
City
as
an
example,
spatial
and
temporal
pattern
recent
35
years
was
analyzed
by
introducing
feature
space
model
gravity
center
model,
then
study
area
clarified
based
on
GeoDetector.
The
results
follows:
(1)
point-to-point
B
(bare
land
index)-DI
(dryness
index)
has
high
applicability
for
monitoring,
its
inversion
accuracy
91.3%.
(2)
During
past
years,
belonged
to
moderate
whole,
zones
intensive
severe
mainly
distributed
Weining
Yi,
Hui,
Miao
Autonomous
Region.
(3)
1985–2020,
showed
overall
weakening
trend
(‘weakening–aggravating–weakening’).
(4)
From
1985
2020,
moved
westward,
indicating
that
aggravating
degree
western
region
higher
than
eastern
region.
(5)
affecting
shifted
from
natural
factor
(vegetation
coverage)
human
activity
(population
density).
research
could
provide
decision
supports
prevention
control
even
area.
Geoderma,
Год журнала:
2023,
Номер
435, С. 116496 - 116496
Опубликована: Май 12, 2023
Increased
plant
carbon
(C)
input
into
the
soils
after
cropland
abandonment
results
in
not
only
C
accumulation,
but
also
higher
microbial
activities
and
consequently
faster
organic
matter
decomposition.
We
investigated
link
between
soil
accumulation
properties
a
chronosequence
(0–65
years)
of
post-agricultural
self-restoration
Luvisols
-
dominating
type
worldwide.
Microbial
biomass
(MBC)
enzyme
increased
top
(0–20
cm)
during
37-year
period
self-restoration.
Accumulation
was
than
at
earlier
stages
(0–22
because
fast
growth
induced
by
labile
litter
components.
The
response
activity
more
sensitive
to
land
use
changes
compared
that
C.
Activities
enzymes
responsible
for
cycle
nitrogen
(N)
phosphorus
(P)
cycles
least
up
37
years
abandonment,
indicating
adaptations
high
with
wide
C/N
C/P
ratios.
Similarly,
β-xylosidase
solely
which
reached
similar
secondary
forest
65
years,
due
recalcitrant
age.
demand
caused
bacterial
portion
community
(based
on
PLFA
composition),
turn,
resulted
lower
ratio.
Enzyme
stoichiometry
revealed
microorganisms
were
limited
N
topsoil
years.
Overall,
quantity
quality
inputs,
changed
restoration,
regulated
production,
offering
profound
comprehension
ecosystem
succession.
Global Change Biology,
Год журнала:
2023,
Номер
29(17), С. 5044 - 5061
Опубликована: Июль 10, 2023
Microbes
play
an
important
role
in
aquatic
carbon
cycling
but
we
have
a
limited
understanding
of
their
functional
responses
to
changes
temperature
across
large
geographic
areas.
Here,
explored
how
microbial
communities
utilized
different
substrates
and
the
underlying
ecological
mechanisms
along
space-for-time
substitution
gradient
future
climate
change.
The
included
47
lakes
from
five
major
lake
regions
China
spanning
difference
nearly
15°C
mean
annual
temperatures
(MAT).
Our
results
indicated
that
warmer
generally
had
lower
values
variables
related
concentrations
greater
utilization
than
those
colder
regions.
under
higher
could
be
attributed
bacterial
community
composition,
with
abundance
Cyanobacteria
Actinobacteriota
less
Proteobacteria
We
also
found
core
species
networks
changed
increasing
temperature,
Hydrogenophaga
Rhodobacteraceae,
which
inhibited
amino
acids
carbohydrates,
CL500-29-marine-group,
promoted
all
almost
substrates.
Overall,
our
findings
suggest
can
mediate
by
changing
interactions
between
bacteria
individual
substrates,
discovery
affect
provides
insight
into
potential
sequestration
within
inland
water
bodies
warming.
