Abstract.
Ecosystem
manipulative
experiments
are
one
of
the
most
powerful
tools
to
understand
terrestrial
ecosystem
responses
global
change
because
they
measure
real
in
ecosystems.
However,
their
scope
is
limited
space
and
time
due
cost
labour
intensity.
This
makes
generalising
results
from
such
difficult,
which
creates
a
conceptual
gap
between
local
scale
process
understanding
future
predictions.
Recent
efforts
have
seen
used
combination
with
dynamic
vegetation
models,
commonly
evaluate
model
predictions
under
drivers.
there
much
more
potential
combining
models
experiments.
Here,
we
discuss
value
workflow
for
using
together
process-based
enhance
both.
We
suggest
that
can
be
prior
start
an
experiment
generate
hypotheses,
identify
data
needs
general
guide
experimental
design.
Models,
when
adequately
constrained
observations,
also
predict
variables
difficult
frequently
or
at
all,
provide
complete
picture
states.
Finally,
help
generalise
time,
by
providing
framework
derived
site-level
incorporated.
formalised
model-data
integration
frameworks
parameter
estimation
selection,
path
made
possible
increasing
number
diverse
observation
streams.
The
ideas
presented
here
roadmap
-
studies.
Biogeosciences,
Journal Year:
2023,
Volume and Issue:
20(17), P. 3637 - 3649
Published: Sept. 6, 2023
Abstract.
Ecosystem
manipulative
experiments
are
a
powerful
tool
to
understand
terrestrial
ecosystem
responses
global
change
because
they
measure
real
in
ecosystems
and
yield
insights
into
causal
relationships.
However,
their
scope
is
limited
space
time
due
cost
labour
intensity.
This
makes
generalising
results
from
such
difficult,
which
creates
conceptual
gap
between
local-scale
process
understanding
global-scale
future
predictions.
Recent
efforts
have
seen
used
combination
with
dynamic
vegetation
models,
most
commonly
evaluate
model
predictions
under
drivers.
there
much
more
potential
combining
models
experiments.
Here,
we
discuss
the
value
of
workflow
for
using
together
process-based
enhance
both.
We
suggest
that
can
be
prior
start
an
experiment
generate
hypotheses,
identify
data
needs,
general
guide
experimental
design.
Models,
when
adequately
constrained
observations,
also
predict
variables
difficult
frequently
or
at
all,
provide
complete
picture
states.
Finally,
help
generalise
time,
by
providing
framework
derived
site-level
incorporated.
formalised
model–data
integration
frameworks
parameter
estimation
selection,
path
made
possible
increasing
number
diverse
observation
streams.
The
ideas
presented
here
roadmap
experiment–model
studies.
Journal of Geophysical Research Biogeosciences,
Journal Year:
2025,
Volume and Issue:
130(1)
Published: Jan. 1, 2025
Abstract
Exogenous
nitrogen
(N)
inputs
can
significantly
influence
the
availability
of
N
and
other
nutrients
in
terrestrial
ecosystems.
However,
connections
between
soil
nutrient
dynamics
following
enrichment
plant
uptake
as
well
growth
responses
within
a
community
remain
underexplored.
Here,
we
examined
effects
addition
on
several
macro
micronutrients
three
dominant
plants
meadow
steppe
China.
The
results
showed
that
(a)
exchangeable
Ca
Mg
initially
increased
when
rate
was
lower
than
10
g
m
−2
yr
−1
then
decreased
at
higher
rates
(10–50
),
whereas
available
P
extractable
Fe,
Mn,
Cu
remained
relatively
stable
low
but
high
rates.
(b)
response
concentrations
stoichiometry
these
to
not
only
species‐specific
also
marked
differences
especially
for
those
micronutrients.
(c)
Species
with
variation
concentrations,
such
Leymus
chinensis
(
Lc
)
Thermopsis
lanceolata
Tl
exhibited
(for
or
biomass
after
addition,
species
Carex
duriuscula
,
greater
variability,
experienced
reduced
biomass.
These
findings
suggest
acidification
induced
by
exogenous
alters
further
imbalanced
stoichiometries,
which
will
affect
structures
communities
under
global
change
scenarios.
Research Square (Research Square),
Journal Year:
2023,
Volume and Issue:
unknown
Published: Dec. 29, 2023
Abstract
Background
and
aims
Nitrogen
(N)
deposition
is
a
global
driver
of
change
that
affects
microbial
biomass
ecosystem
processes.
However,
it
remains
unclear
whether
N
enrichment
impacts
in
soil
across
ecosystems.
Methods
In
this
study,
we
synthesized
1,385
paired
observations
from
125
studies
worldwide
to
evaluate
the
effects
addition
on
biomass.
Results
We
found
substantially
suppresses
total
biomass,
including
bacterial,
fungal,
arbuscular
mycorrhizal
fungi
Importantly,
strong
negative
globally
caused
by
N-enrichment-induced
acidification.
Moreover,
mainly
shapes
acidification
through
increased
concentration
ammonium
changing
exchangeable
cations
soil,
magnesium,
calcium,
sodium,
manganese,
aluminum
ions.
Conclusions
Overall,
our
findings
demonstrate
crucial
factor
consider
for
preserving
communities
function
under
future
trends
increasing
enrichment.
Journal of Soils and Sediments,
Journal Year:
2023,
Volume and Issue:
23(9), P. 3298 - 3309
Published: June 5, 2023
Abstract
Purpose
Although
past
studies
have
found
well-constrained
soil
carbon
(C)/nutrient
ratios,
the
effects
of
increased
nitrogen
(N)
and
water
inputs
on
these
ratios
across
depths
rarely
been
assessed
in
semi-arid
grasslands.
Methods
In
this
study,
we
evaluated
contents
total
C,
N,
phosphorus
(P),
sulfur
(S),
their
stoichiometric
a
0–80
cm
profile
following
13
years
successive
N
(at
rates
5
15
g
m
−2
yearr
−1
)
addition
(180
mm
per
growing
season)
grassland
Mongolian
Plateau.
Results
0–10
layer,
long-term
tended
to
increase
C
but
decreased
P
S
compared
control.
The
addition,
as
observed
soil,
however,
were
not
consistent
with
that
deep
10–80
layers.
Water
entire
content
only
0–40
soil.
Moreover,
combined
generally
had
stronger
four
elements
whole
profile.
For
stoichiometry
elements,
low
rate
(5
year
C:N
P:S
soils,
high
(15
produced
opposite
effect.
Both
resulted
an
C:P,
C:S,
N:P,
N:S
ratios.
Similarly,
plots
received
water,
alone
while
caused
higher
fluctuations
six
elemental
However,
there
was
no
pattern
change
any
one
ratio,
independent
when
taking
into
account
depths.
Conclusion
Our
findings
showed
P,
highly
influenced
by
depth
could
be
modulated
increasing
precipitation.
These
results
need
carefully
considered
managing
ecological
environment
steppes.
