Plant species diversity and abundance of functional groups influence net nitrogen mineralization along productivity gradients in montane Calluna‐dominated heathlands
Plants People Planet,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 15, 2025
Societal
Impact
Statement
Heathlands
are
globally
important
ecosystems
that
provide
key
functions
and
services
but
increasingly
threatened
by
land
use
changes.
We
investigated
how
plant
diversity
productivity
influence
nitrogen
cycling
under
different
management
regimes.
Our
findings
reveal
extensive
grazing
modulates
the
relationship
between
soil
dynamics,
with
contrasting
effects
in
grazed
versus
abandoned
sites.
Increased
species
abundance
of
annual
perennial
herbs
sites
were
associated
enhanced
N
mineralization
rates.
These
insights
highlight
need
for
adaptive
strategies
to
address
challenges
posed
changes
biodiversity
loss
heathland
ecosystems.
Summary
Abiotic
controls
on
N‐transformations
heathlands
well
understood;
however,
diversity–productivity
remain
unclear,
particularly
concerning
management.
evaluated
feedbacks
among
diversity,
functional
group
properties,
as
their
net
rates,
six
dominated
Calluna
vulgaris
differing
history
(grazed
at
low
intensity
abandoned).
revealed
a
pronounced
increase
organic
matter
content
abandoned,
species‐poor
compared
stronger
feedback
total
grazed,
species‐rich
sites,
suggesting
trade‐offs
carbon‐to‐nitrogen
ratio.
Mean
ammonification,
nitrification,
rates
showed
no
significant
differences
heathlands.
However,
increased
productive
groups
In
contrast,
high
led
woody
traits
related
nutrient
conservation,
which
was
linked
slower
enhance
our
understanding
diversity‐productivity
heathlands,
providing
anticipating
ecosystem
responses
changing
Language: Английский
Spatial context allows the evolution the control of nitrification by plants
bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 21, 2024
Abstract
Some
plant
species
inhibit
or
stimulate
soil
nitrification,
the
transformation
of
ammonium
into
nitrate
by
microorganisms.
The
control
nitrification
may
in
turn
alter
ecosystem
productivity
and
functioning.
Given
potential
positive
impacts
on
fitness,
we
aim
to
determine
conditions
under
which
is
likely
have
been
selected,
consequences
that
selection
We
investigate
both
role
abiotic
context
(nutrient
availability
diffusion)
other
traits
(mortality
dispersal).
A
first
mean-field
model
shows
when
nitrogen
pools
are
shared
among
individuals
within
population,
counter-selected.
tragedy
commons
occurs
because
costs
controlling
(ie.
producing
root
exudates)
only
affect
while
benefits
all
individuals.
then
assume
effects
spatially
restricted
rhizosphere,
build
a
explicit,
individual-based
mutation
possible.
Plant
capacity
evolves
environment
sufficiently
private
generation
time
long,
leading
higher
fitness
construction
process.
In
such
cases,
plants
evolve
losses
greater
than
nitrate.
Finally,
biomass
production
tends
be
maximal
at
selected
strategy
diffusion
low.
Our
results
help
predict
strategies
should
found
different
parts
world.
Language: Английский