Acta Oecologica,
Год журнала:
2021,
Номер
113, С. 103775 - 103775
Опубликована: Авг. 26, 2021
Litter
decomposition
is
a
key
driver
of
ecosystem
processes
and
carbon
cycling.
Decomposition
rate
influenced
by
numerous
factors,
such
as
temperature,
humidity,
litter
properties,
soil
properties
fauna/microbial
communities.
The
aim
this
review
was
to
summarize
current
knowledge
on
above
the
treeline
in
alpine
regions
worldwide
identify:
I)
factors
that
have
been
studied
great
detail,
II)
less
intensively
investigated,
III)
geographical
well
studied,
IV)
with
consistent
or
inconsistent
effects
decomposition.
showed
results
for
all
covered
two
more
studies
regarding
their
effect
(positive,
negative,
no
effect),
usually
result
interactions
between
factors.
Studies
examining
one
several
physical
environment
(i.e.,
altitude,
experimental
warming,
microclimate,
snow
cover
moisture)
were
most
common,
while
different
aspects
resource
quality
second
common.
impacts
trophic
microbes
fauna
frequently
studied.
Europe
Asia
best-represented
regions,
terms
number
distribution,
there
from
Africa
very
few
South
America
Australia.
North
American
Colorado,
those
China.
In
order
obtain
better
global
representation,
need
Africa,
America,
There
also
explain
large
variation
responses
rates
influencing
environments.
Future
research
should
focus
experiments
testing
specific
relationships,
potential
interaction
temperature
moisture
its
regions.
Global Change Biology,
Год журнала:
2024,
Номер
30(3)
Опубликована: Март 1, 2024
Abstract
Treelines
advance
due
to
climate
warming.
The
impacts
of
this
vegetation
shift
on
plant–soil
nutrient
cycling
are
still
uncertain,
yet
highly
relevant
as
availability
stimulates
tree
growth.
Here,
we
investigated
nitrogen
(N)
and
phosphorus
(P)
in
plant
soil
pools
along
two
tundra–forest
transects
Kola
Peninsula,
Russia,
with
a
documented
elevation
birch‐dominated
treeline
by
70
m
during
the
last
50
years.
Results
show
that
although
total
N
P
stocks
soil–plant
system
did
not
change
elevation,
their
distribution
was
significantly
altered.
With
transition
from
high‐elevation
tundra
low‐elevation
forest,
stones
decreased,
possibly
reflecting
enhanced
weathering.
In
contrast,
biomass
approximately
tripled
available
increased
fivefold
toward
forest.
This
paralleled
decreasing
carbon
(C)‐to‐nutrient
ratios
foliage
litter,
smaller
C:N:P
microbial
biomass,
lower
enzymatic
activities
related
acquisition
forest
soils.
An
incubation
experiment
further
demonstrated
manifold
higher
net
mineralization
rates
litter
compared
tundra,
likely
decomposing
organic
matter.
Overall,
our
results
expansion
increases
mobilization
nutrients
through
weathering
positive
feedback,
nutrient‐rich
releasing
greater
amounts
upon
decomposition.
While
low
may
retard
advances,
its
improvement
promotes
growth
development.
Ecological Indicators,
Год журнала:
2023,
Номер
157, С. 111251 - 111251
Опубликована: Ноя. 16, 2023
Coastal
nutrient
loading
has
been
linked
to
a
decline
in
the
capacity
of
seagrass
ecosystems
sequester
carbon
('blue
carbon');
however,
mechanisms
are
unclear.
Here
we
investigated
how
can
affect
contribution
that
plant
material
makes
blue
stocks
by
investigating
quality-decomposition
dynamics.
Specifically,
used
combination
laboratory
and
field
experiments
account
for
various
changes
biogeochemical
cycling
from
meadows,
ranging
leaf
quality
CO2
fluxes.
It
was
found
increased
'labile'
content
(i.e.
levels
nitrogen,
phosphorus
soluble
organic
(amino
acid
sugar
content),
at
same
time
decreased
'recalcitrant'
materials
harder
microbes
break
down,
such
hemicellulose,
cellulose
lignin
contents).
Nutrient-enriched
leaves
decomposed
∼
18
%
faster
than
non-enriched
greater
biomass
loss
nutrient-affected
seagrass),
resulting
80
more
emissions
nutrient-enriched
seagrass.
We
also
naturally
contained
high
labile
start
experiment
were
affected
degree
higher
emissions)
nutrients
addition
had
proportions
recalcitrant
begin
with.
Overall,
these
findings
suggest
weaken
act
as
sinks
through
its
effect
on
decomposability.
Land Degradation and Development,
Год журнала:
2021,
Номер
33(1), С. 179 - 192
Опубликована: Окт. 25, 2021
Abstract
The
chemical
traits
of
litter
are
among
the
most
critical
factors
that
affect
its
decomposition.
During
vegetation
restoration
planted
forests,
increasing
age
species
and
succession
understory
may
lead
to
significant
changes
in
traits.
However,
it
is
unclear
how
these
occur
they
Therefore,
we
studied
decomposition
from
four
Robinia
pseudoacacia
plantations
Loess
Plateau
China
with
stand
ages
10–43
years
using
an
indoor
simulation
test.
We
measured
substrate
quality
diversity,
structural
properties
microbial
community,
activity
enzymes,
mixed
effects
during
restoration.
Their
relationships
rate
were
analyzed
equation
modeling.
Improvements
forest
induced
by
drove
fungal
community
composition
late
(day
358),
which
turn
increased
lignin‐decomposing
enzymes
ultimately
accelerated
At
same
time,
decreases
diversity
reduced
fungi
middle
(days
182
358).
This
caused
negative
effects,
thereby
inhibiting
improvements
dominated
rate,
R.
plantation
thus
over
course
Forests,
Год журнала:
2022,
Номер
13(3), С. 372 - 372
Опубликована: Фев. 23, 2022
The
internal
correlation
of
plant,
litter
and
soil
stoichiometric
characteristics
their
responses
to
the
environment
are
helpful
for
revealing
nutrient
cycling
mechanisms.
However,
few
studies
have
assessed
relationship
between
stock
along
elevational
gradients,
which
limit
understanding
relationships
in
ecosystem.
To
gain
insight
into
forces
its
ecological
gradients
forest
ecosystem,
we
investigated
carbon
(C),
nitrogen
(N)
phosphorus
(P)
contents
ratios
dominant
plants,
layers
at
different
elevations
(900–1600
m)
Daiyun
Mountain.
results
showed
following:
(1)
C,
N
P
an
increasing
order
as
plant
>
each
elevation
Dominant
plants
were
limited
by
elevation.
high
higher
than
those
low
significant
correlations
found
TN,
TP
air
temperature
(negative),
conforms
Temperature-Plant
Physiological
Hypothesis
(TPPH).
(2)
Significant
C:N
(positive);
C:P
N:P
(negative).
(3)
Elevation
slope
essential
environmental
factors
ratio
litter,
pH
was
main
factor
that
correlated
negatively
stoichiometry
ratio.
Litter
provided
a
link
soil,
there
coupling
among
nutrients.
could
provide
theoretical
basis
subtropical
ecosystem
China.
