Climate
warming
is
predicted
to
alter
species
interactions,
which
could
potentially
lead
extinction
events.
However,
there
an
ongoing
debate
whether
the
effects
of
on
biodiversity
may
be
moderated
by
itself.
We
tested
soil
nematodes,
one
most
diverse
and
abundant
metazoans
in
terrestrial
ecosystems,
along
a
gradient
environmental
complexity
created
plant
richness.
Warming
increased
nematode
diversity
complex
(16-species
mixtures)
communities
(by
~36%)
but
decreased
it
simple
(monocultures)
~39%)
compared
ambient
temperature.
Further,
led
higher
levels
taxonomic
relatedness
across
all
Our
results
highlight
both
need
for
maintaining
species-rich
help
offset
detrimental
inability
maintain
distinctness
when
occur.
Freshwater Biology,
Год журнала:
2017,
Номер
62(11), С. 1869 - 1878
Опубликована: Сен. 18, 2017
Abstract
Globally,
freshwater
ecosystems
are
warming
at
unprecedented
rates
and
northern
temperate
lakes
simultaneously
experiencing
increased
runoff
of
humic
substances
(brownification),
with
little
known
consequences
for
future
conservation
biodiversity
ecosystem
functioning.
We
employed
an
outdoor
mesocosm
experiment
during
spring
summer
to
investigate
the
combined
effects
gradually
increasing
brownification
perturbations
on
phytoplankton
community
structure
(biodiversity
composition)
functioning
(biomass).
While
we
did
not
observe
overall
significant
treatment
total
biomasses,
show
that
predicted
increases
in
can
reduce
considerably,
occasionally
up
90%
Shannon
diversity
estimates.
Our
results
demonstrate
loss
is
driven
by
dominance
mixotrophic
algae
(
Dinobryon
Cryptomonas
),
whereas
several
other
taxa
may
be
temporarily
displaced
from
community,
including
Cyclotella
,
Desmodesmus
Monoraphidium
Tetraedron
Nitzschia
Golenkinia
.
The
observed
coincided
increase
bacterial
production
providing
resources
potential
mixotrophs
along
gradient
brownification.
This
coupling
between
was
likely
a
major
cause
behind
competitive
displacement
obligate
phototrophs
supports
evidence
importance
consumer–prey
dynamics
shaping
environmental
impacts
communities.
conclude
profound
indirectly
affecting
interactions
among
taxa.
Importantly,
our
abrupt
biodiversity;
instead
reduction
richness
levelled
off
after
exceeding
threshold
These
exemplify
complex
nonlinear
responses
provide
further
insights
predicting
patterns
freshwaters.
Proceedings of the Royal Society B Biological Sciences,
Год журнала:
2017,
Номер
284(1851), С. 20162570 - 20162570
Опубликована: Март 29, 2017
Climate
warming
can
destabilize
interactions
between
competitors
as
smaller
organisms
gain
advantages
in
warmer
environments.
Whether
and
how
warming-induced
effects
on
competitive
are
modified
by
predation
remains
unknown.
We
hypothesized
that
will
offset
the
advantage
of
prey
species
environments
because
their
greater
vulnerability
to
predation.
To
test
this,
we
assembled
a
litter
arthropod
community
with
two
Collembola
(
Folsomia
candida
Proisotoma
minuta
)
different
body
sizes
across
temperature
gradient
(three
thermal
environments)
presence
absence
predatory
mites.
Predatory
mites
reduced
coexistence
increasing
temperatures.
Contradicting
our
hypothesis,
larger
always
outperformed
predators.
Larger
probably
benefited
they
expressed
trait
(body
length)
plasticity
warming.
Warming
thus
magnify
reduce
probability
coexistence.
Climate
warming
is
predicted
to
alter
species
interactions,
which
could
potentially
lead
extinction
events.
However,
there
an
ongoing
debate
whether
the
effects
of
on
biodiversity
may
be
moderated
by
itself.
We
tested
soil
nematodes,
one
most
diverse
and
abundant
metazoans
in
terrestrial
ecosystems,
along
a
gradient
environmental
complexity
created
plant
richness.
Warming
increased
nematode
diversity
complex
(16-species
mixtures)
communities
(by
~36%)
but
decreased
it
simple
(monocultures)
~39%)
compared
ambient
temperature.
Further,
led
higher
levels
taxonomic
relatedness
across
all
Our
results
highlight
both
need
for
maintaining
species-rich
help
offset
detrimental
inability
maintain
distinctness
when
occur.
