Frontiers in Microbiology,
Год журнала:
2022,
Номер
13
Опубликована: Ноя. 30, 2022
Soil
microorganisms
found
in
shrub-meadow
ecosystems
are
highly
heterogeneous
and
extremely
sensitive
to
grazing,
but
changes
microbial
compositional
functional
heterogeneity
during
grazing
exclusion
(GE)
have
been
largely
overlooked
compared
community
diversity.
We
collected
soil
samples
from
heavily
grazed
plots
(6.0
sheep/ha)
GE
(matrix
patch
areas
both),
used
a
combination
of
next-generation
sequencing,
vegetation
features,
the
associated
property
data
investigate
effect
on
composition
function
communities
(bacteria
fungi,
archaea)
0-10
cm
soils.
Regarding
composition,
proportions
species
bacteria,
archaea
were
97.3,
2.3,
0.4%,
respectively.
significantly
affected
diversity
fungi
not
that
bacteria.
decreased
bacteria
(2.9%
matrix
6.2%
patch)
(31.1%
19.7%
increased
by
1.4%
patch.
function,
enzyme
10.4
9.4%,
respectively,
after
6
years
fencing,
exemplifying
high
level
redundancy.
The
Kyoto
Encyclopedia
Genes
Genome
pathways-cell
growth
death,
translation,
digestive
system,
nucleotide
metabolism-were
biomarkers
(linear
discriminant
analysis
size
method)
matrix-non-grazed
plots,
whereas
lipid
metabolism,
xenobiotics
biodegradation
metabolism
terpenoids
polyketides,
cell
motility,
cancer:
overview,
endocrine
membrane
transport
patch-non-grazed
plots.
Additionally,
improved
capacity
for
fatty
acid
abundance
methane-producing
42.9%.
Redundancy
revealed
factors
most
aggregates,
moisture,
number
plant
species,
those
available
phosphorus,
temperature,
shrub
canopy
diameter.
Our
results
quantified
heterogeneity,
emphasizing
different
responses
alpine
shrubs
meadows.
Mathematical Biosciences,
Год журнала:
2023,
Номер
368, С. 109128 - 109128
Опубликована: Дек. 20, 2023
The
emergence
and
maintenance
of
tree
species
diversity
in
tropical
forests
is
commonly
attributed
to
the
Janzen-Connell
(JC)
hypothesis,
which
states
that
growth
seedlings
suppressed
proximity
conspecific
adult
trees.
As
a
result,
JC
distribution
due
density-dependent
negative
feedback
emerges
form
(transient)
pattern
where
seedling
density
highest
at
intermediate
distances
away
from
parent
Several
studies
suggest
required
feedbacks
behind
this
could
result
interactions
between
trees
soil-borne
pathogens.
However,
plant-soil
may
involve
additional
mechanisms,
including
accumulation
autotoxic
compounds
generated
through
litter
decomposition.
An
essential
task
therefore
consists
constructing
mathematical
models
incorporating
both
effects
showing
ability
support
distributions.
In
work,
we
develop
analyse
novel
reaction-diffusion-ODE
model,
describing
within
across
different
life
stages
(seeds,
seedlings,
adults)
as
driven
by
feedback.
particular,
show
under
strong
travelling
wave
solutions
exist,
creating
transient
distributions
are
agreement
with
hypothesis.
Moreover,
these
pulled
fronts
robust
feature
they
occur
over
broad
parameter
range.
Finally,
calculate
their
linear
spreading
speed
its
(in)dependence
on
relevant
nondimensional
parameters.
Land,
Год журнала:
2022,
Номер
11(2), С. 285 - 285
Опубликована: Фев. 13, 2022
Vegetation
rings
are
a
common
pattern
in
water-limited
environments
and
mostly
occur
clonal
plants.
This
study
presents,
for
the
first
time,
of
geophyte
species
Urginea
maritima.
The
rings,
typically
40–90
cm
diameter,
abundant
sandy
environment
Little
Petra
Wadi
Rum,
southern
Jordanian
drylands.
Soil
properties
were
studied
rings’
center,
periphery,
matrix.
Soil-water
volumetric
content
was
significantly
higher
periphery
than
center
soil
organic
carbon
highest
intermediate
lowest
At
same
texture,
hydraulic
conductivity,
gravimetric
moisture
at
hygroscopic
level
similar
three
microenvironments.
According
to
results,
possible
ring
formation
mechanism
is
soil-water
uptake
mechanism,
which
results
competition
between
plants
those
generally
attributed
with
large
lateral
root
zones.
Numerical
simulations
mathematical
model
implemented
this
support
mechanism.
A
second
negative
plant-soil
feedback
due
accumulation
dead
biomass
its
consequent
decomposition,
resultant
release
autotoxic
compounds.
It
that
several
mechanisms
simultaneously
synergistically
affect
U.
maritima
rings.
PLoS Computational Biology,
Год журнала:
2021,
Номер
17(9), С. e1009427 - e1009427
Опубликована: Сен. 29, 2021
Humans
play
major
roles
in
shaping
and
transforming
the
ecology
of
Earth.
Unlike
natural
drivers
ecosystem
change,
which
are
erratic
unpredictable,
human
intervention
ecosystems
generally
involves
planning
management,
but
often
results
detrimental
outcomes.
Using
model
studies
aerial-image
analysis,
we
argue
that
design
a
successful
form
calls
for
identification
self-organization
modes
drive
studying
their
dynamics.
We
demonstrate
this
approach
with
two
examples:
grazing
management
drought-prone
ecosystems,
rehabilitation
degraded
vegetation
by
water
harvesting.
show
can
increase
resilience
to
droughts,
rather
than
imposing
an
additional
stress,
if
managed
spatially
non-uniform
manner,
fragmental
restoration
along
contour
bunds
is
more
resilient
common
practice
continuous
stripes.
conclude
discussing
need
Frontiers in Microbiology,
Год журнала:
2022,
Номер
13
Опубликована: Ноя. 30, 2022
Soil
microorganisms
found
in
shrub-meadow
ecosystems
are
highly
heterogeneous
and
extremely
sensitive
to
grazing,
but
changes
microbial
compositional
functional
heterogeneity
during
grazing
exclusion
(GE)
have
been
largely
overlooked
compared
community
diversity.
We
collected
soil
samples
from
heavily
grazed
plots
(6.0
sheep/ha)
GE
(matrix
patch
areas
both),
used
a
combination
of
next-generation
sequencing,
vegetation
features,
the
associated
property
data
investigate
effect
on
composition
function
communities
(bacteria
fungi,
archaea)
0-10
cm
soils.
Regarding
composition,
proportions
species
bacteria,
archaea
were
97.3,
2.3,
0.4%,
respectively.
significantly
affected
diversity
fungi
not
that
bacteria.
decreased
bacteria
(2.9%
matrix
6.2%
patch)
(31.1%
19.7%
increased
by
1.4%
patch.
function,
enzyme
10.4
9.4%,
respectively,
after
6
years
fencing,
exemplifying
high
level
redundancy.
The
Kyoto
Encyclopedia
Genes
Genome
pathways-cell
growth
death,
translation,
digestive
system,
nucleotide
metabolism-were
biomarkers
(linear
discriminant
analysis
size
method)
matrix-non-grazed
plots,
whereas
lipid
metabolism,
xenobiotics
biodegradation
metabolism
terpenoids
polyketides,
cell
motility,
cancer:
overview,
endocrine
membrane
transport
patch-non-grazed
plots.
Additionally,
improved
capacity
for
fatty
acid
abundance
methane-producing
42.9%.
Redundancy
revealed
factors
most
aggregates,
moisture,
number
plant
species,
those
available
phosphorus,
temperature,
shrub
canopy
diameter.
Our
results
quantified
heterogeneity,
emphasizing
different
responses
alpine
shrubs
meadows.
