Examining the stoichiometry of C:N:P:K in the dynamics of foliar-litter-soil within dominant tree species across different altitudes in southern China
Global Ecology and Conservation,
Год журнала:
2024,
Номер
51, С. e02885 - e02885
Опубликована: Март 5, 2024
Ecological
stoichiometry
assessment
provides
insight
into
the
interactions
between
foliar-litter-soil
dynamics
among
dominant
tree
species
and
facilitates
their
conservation.
However,
little
research
has
been
carried
out
on
such
trends
within
mixed
forest
ecosystems
in
national
nature
reserves
globally.
The
present
study
fills
this
knowledge
gap
by
examining
ecological
of
at
various
altitudes
desirable
southern
China.
This
concentrates
six
representative
plant
communities,
each
pivotal
maintaining
carbon
(C),
nitrogen
(N),
phosphorus
(P),
potassium
(K)
balances,
along
with
energy
flows.
selected
communities
encompass
two
plantations
comprising
Cunninghamia
lanceolata
Phyllostachys
edulis
four
natural
forests,
including
evergreen
broad-leaved
(Manglietia
conifera),
deciduous
(Daphniphyllum
macropodum
Acer
davidii),
consisting
Fagus
longipetiolata,
coniferous
(Tsuga
chinensis).
Furthermore,
involved
measurement
C,
N,
P,
K
contents
foliage,
litter,
soil.
outcomes
revealed
significant
variations
foliar,
soil
stoichiometric
attributes
across
communities.
Correlation
analysis
highlighted
substantial
positive
associations
N
P
foliar
litter
components,
while
exhibited
insignificance.
Broad-leaved
forests
generally
displayed
higher
leaf
compared
to
forests.
exceptions
observed
content
M.
conifera
D.
F.
longipetiolata.
high-altitude
T.
chinensis
one
highest
ratios.
Notably,
demonstrated
richness
but
deficiency
K,
impacting
growth
limiting
availability.
Additionally,
low
hindered
decomposition.
nutrient
ratios
other
nutrients
remained
relatively
stable
except
for
C:
which
were
consistent
homeostasis
theory.
These
findings
provide
scientific
evidence
cycle
regulation,
ecosystem
protection,
valuable
insights
complex
relationships
Язык: Английский
Ecological-economic assessment of forest land degradation neutrality in the Indus River Basin of Pakistan
Environment Development and Sustainability,
Год журнала:
2024,
Номер
unknown
Опубликована: Июль 10, 2024
Язык: Английский
Bacterial communities and soil functionality in artificially remediated vegetation of the three gorges reservoir zone
Frontiers in Plant Science,
Год журнала:
2025,
Номер
16
Опубликована: Апрель 28, 2025
Riparian
zones
maintain
biodiversity,
cyclic
nutrients,
and
regulate
water
quality.
However,
their
stability
is
increasingly
threatened
by
human
activities
such
as
dam
construction
climate
variability.
This
study
focuses
on
the
riparian
of
Three
Gorges
Dam
Reservoir
(TGDR),
a
region
marked
fluctuating
levels
subtropical
southeast
monsoon
climate.
We
investigated
seasonal
vegetation-specific
dynamics
soil
properties
microbial
communities
in
dominated
artificially
remediated
plants
(ARPs)
TGDR.
The
selected
ARP
species
included
herbaceous
Cynodon
dactylon
(CD)
Hemarthria
altissima
(HA),
known
for
capacity
rapid
stabilization,
tree
Salix
matsudana
(SM)
Taxodium
distichum
(TD),
which
enhance
nutrient
cycling
through
litter
inputs
root
exudates.
These
were
evaluated
across
spring
(T1),
summer
(T2),
autumn
(T3).
Our
analysis
360
samples
led
to
generation
high-quality
sequences
that
provided
insights
into
diversity.
Principal
component
identified
organic
matter,
ammonium
nitrogen,
total
nitrogen
main
contributors
property
variance,
explaining
53.68%
T1,
51.52%
T2,
56.37%
T3
variance
(p
<
0.01).
Correlation
highlighted
positive
relationship
between
pH
Nitrospirae
(r
=
0.603)
Proteobacteria
0.558).
Enzyme
activity
varied
season,
with
acid
phosphatase
peaking
invertase
highest
T1.
also
made
functional
predictions
pathways
pertinent
metabolism,
genetic
information
processing,
environmental
signal
transduction.
There
shifts
metabolic
pathways,
an
increase
carbohydrate
metabolism
via
TD.
In
addition,
there
was
rise
amino
CD.
assessment
diversity
uncovered
68
bacterial
phyla,
Acidobacteria
emerging
dominant
taxa.
results
indicate
ARPs
positively
influence
health,
cycling,
overall
ecosystem
integrity.
findings
hold
significant
implications
restoration
regions
experiencing
changes.
Язык: Английский
Genetic variability and population divergence of Rhododendron platypodum Diels in China in the context of conservation
Frontiers in Forests and Global Change,
Год журнала:
2024,
Номер
7
Опубликована: Март 14, 2024
Genetic
diversity
in
endangered
species
is
of
special
significance
the
face
escalating
global
climate
change
and
alarming
biodiversity
declines.
Rhododendron
platypodum
Diels,
an
endemic
to
China,
distinguished
by
its
restricted
geographical
range.
This
study
aimed
explore
genetic
differentiation
among
populations,
gathering
samples
from
all
four
distribution
sites:
Jinfo
Mountain
(JFM),
Zhaoyun
(ZYM),
Baima
(BMM),
Mao’er
(MEM).
We
employed
18
pairs
Simple
Sequence
Repeat
(SSR)
primers
ascertain
structural
characteristics
these
further
utilized
19
phenotypic
data
points
corroborate
observed
populations.
These
detected
52
alleles,
with
average
number
alleles
(
Na
)
being
2.89,
effective
Ne
2.12,
heterozygosity
Ho
0.57,
expected
He
0.50.
array
demonstrates
efficacy
reflecting
R.
’s
diversity.
SSR-based
analysis
populations
yielded
,
Shannon
index
I
values
ranging
0.47
0.65,
0.36
0.46,
0.53
0.69,
respectively.
Notably,
ZYM
population
emerged
as
most
genetically
diverse.
Further
analysis,
incorporating
molecular
variance,
principal
component
UPGMA
cluster
structure
highlighted
significant
between
Chongqing
(BMM,
JFM,
ZYM)
Guangxi
(MEM)
Morphological
corroborated
findings.
Additionally,
marked
morphological
distinctions
were
evident
three
ZYM).
suggests
that,
despite
regional
differentiation,
overall
relatively
constrained
compared
other
within
genus.
Consequently,
conservation
hinges
critically
on
preserving
protecting
distinct
Язык: Английский
Seasonal dynamics of soil ecosystems in the riparian zones of the Three Gorges Reservoir, China
Global Ecology and Conservation,
Год журнала:
2024,
Номер
54, С. e03174 - e03174
Опубликована: Сен. 2, 2024
Riparian
soils,
together
with
vegetation,
play
a
crucial
role
in
supporting
biodiversity
and
driving
biogeochemical
processes
within
river
ecosystems.
Conservation
of
riparian
soils
artificial
planting
are
essential
for
ecosystem
recovery
following
land
degradation.
Researchers
focus
on
examining
soil
nutrients,
microbial
biomass,
organic
acid
metabolism
the
interactions
between
plants
along
riverbanks.
However,
seasonal
responses
to
plantations
have
been
infrequently
reported
existing
literature.
This
study
investigates
influence
variations
conditions
growth
artificially
planted
species
zones
Three
Gorges
Dam
Reservoir
(TGDR)
China.
The
sampled
include
Cynodon
dactylon,
Hemarthria
altissima,
Salix
matsudana.
These
provide
valuable
insight
into
properties
zones,
assessing
across
different
seasons:
T1
(spring),
T2
(summer),
T3
(autumn).
results
demonstrated
significant
changes
matter,
ammonium
nitrogen,
nitrate
other
indicators
T3.
Apart
from
invertase
activity
H.
altissima
soil,
enzyme
peaked
during
T1.
Dominant
bacteria
were
examined
using
high-throughput
16S
rDNA
sequencing,
revealing
that
available
belong
62
phyla
211
classes.
Among
most
abundant
Proteobacteria
Actinobacteria,
averaging
over
60%
all
samples.
Principal
component
analyses
accounted
62.81%
(T1),
50.57%
(T2),
54.08%
(T3)
variation
observed
study,
indicating
predominantly
influenced
by
phases,
assuming
factors
remained
constant.
Pearson
correlation
analysis
(p
<
0.05)
identified
strong
positive
correlations
physical
three
plant
(r
≤
0.94),
as
well
negative
bacterial
communities
-1.00).
findings
suggest
selected
well-suited
cultivation
zone
TGDR.
enhances
our
understanding
dynamics
environments,
offering
practical
insights
their
management.
Язык: Английский