Microbiology Spectrum,
Journal Year:
2023,
Volume and Issue:
11(2)
Published: Feb. 7, 2023
Plant
diseases
are
often
caused
by
co-infections
of
multiple
pathogens
with
the
potential
to
aggravate
disease
severity.
In
genetically
diverse
pathogen
species,
can
also
be
strains
same
species.
However,
outcome
such
mixed
infections
different
conspecific
genotypes
is
poorly
understood.
The
interaction
among
complex
lifestyles
outside
and
inside
host
likely
shaped
traits,
including
metabolic
capacity
ability
overcome
immune
responses.
To
disentangle
competitive
outcomes
strains,
we
investigated
fungal
wheat
Zymoseptoria
tritici.
infects
leaves
in
strain
assemblies,
highly
populations
persist
between
growing
seasons.
We
a
set
14
collected
from
field
assess
both
under
culture
conditions
on
host.
Growth
kinetics
cocultured
(~100
pairs)
significantly
deviated
single
expectations,
indicating
exclusion
depending
genotype.
found
similarly
lesion
development
plant
following
pairs
strains.
While
some
pairings
suppressed
overall
damage
host,
other
combinations
exceeded
expectations
based
outcomes.
Strain
competition
absence
were
poor
predictors
suggesting
that
system
adds
significant
complexity.
Intraspecific
co-infection
dynamics
make
important
contributions
wild.
Ecology Letters,
Journal Year:
2022,
Volume and Issue:
25(7), P. 1629 - 1639
Published: May 21, 2022
Historical
contingency,
such
as
the
order
of
species
arrival,
can
modify
competitive
outcomes
via
niche
modification
or
pre-emption.
However,
how
these
mechanisms
ultimately
stabilising
and
average
fitness
differences
remains
largely
unknown.
By
experimentally
assembling
two
congeneric
spider
mite
feeding
on
tomato
plants
during
generations,
we
show
that
arrival
affects
species'
ability
changes
outcome
competition.
Contrary
to
expectations,
did
not
cause
positive
frequency
dependent
priority
effects.
Instead,
coexistence
was
predicted
when
inferior
competitor
(Tetranychus
urticae)
arrived
first.
In
case,
T.
urticae
colonised
preferred
stratum
(leaves)
evansi
leading
spatial
pre-emption,
which
equalised
reduced
differences,
driving
community
assembly
a
close-to-neutrality
scenario.
Our
study
demonstrates
context
interactions
may
jointly
determine
whether
coexist.
Nature Communications,
Journal Year:
2020,
Volume and Issue:
11(1)
Published: Nov. 5, 2020
Abstract
Infection
by
multiple
pathogens
of
the
same
host
is
ubiquitous
in
both
natural
and
managed
habitats.
While
intraspecific
variation
disease
resistance
known
to
affect
pathogen
occurrence,
how
differences
among
genotypes
assembly
communities
remains
untested.
In
our
experiment
using
cloned
replicates
naive
Plantago
lanceolata
plants
as
sentinels
during
a
seasonal
virus
epidemic,
we
find
non-random
co-occurrence
patterns
five
focal
viruses.
Using
joint
species
distribution
modelling,
attribute
occurrence
primarily
local
population
context.
Our
results
show
that
may
play
large,
previously
unquantified
role
community
structure.
Functional Ecology,
Journal Year:
2021,
Volume and Issue:
36(1), P. 214 - 225
Published: Oct. 15, 2021
Abstract
All
parasites
are
heterogeneous
in
space,
yet
little
is
known
about
the
prevalence
and
scale
of
this
spatial
variation,
particularly
wild
animal
systems.
To
address
question,
we
sought
to
identify
examine
dependence
wildlife
disease
across
a
wide
range
Conducting
broad
literature
search,
collated
31
datasets
featuring
89
replicates
71
unique
host–parasite
combinations,
only
51%
which
had
previously
been
used
test
hypotheses.
We
analysed
these
for
within
standardised
modelling
framework
using
Bayesian
linear
models,
then
meta‐analysed
results
generalised
determinants
magnitude
autocorrelation.
detected
autocorrelation
48/89
model
(54%)
21/31
(68%),
spread
all
groups.
Even
some
very
small
study
areas
(under
0.01
km
2
)
exhibited
substantial
variation.
Despite
common
manifestation
our
meta‐analysis
was
unable
host‐,
parasite‐,
or
sampling‐level
heterogeneity
Parasites
transmission
modes
easily
detectable
patterns,
implying
that
structured
contact
networks
susceptibility
effects
potentially
as
important
spatially
structuring
environmental
drivers
efficiency.
Our
findings
demonstrate
fine‐scale
patterns
infection
manifest
frequently
systems,
many
studies
able
investigate
them—whether
not
original
aim
varying
processes.
Given
widespread
nature
findings,
should
more
record
analyse
data,
facilitating
development
testing
hypotheses
ecology.
Ultimately,
may
pave
way
an
priori
predictive
variation
novel
A
free
Plain
Language
Summary
can
be
found
Supporting
Information
article.
Plant Cell & Environment,
Journal Year:
2021,
Volume and Issue:
44(4), P. 1215 - 1230
Published: Jan. 17, 2021
Abstract
Soil
legacies
play
an
important
role
for
the
creation
of
priority
effects.
However,
we
still
poorly
understand
to
what
extent
metabolome
found
in
soil
solution
a
plant
community
is
conditioned
by
its
species
composition
and
whether
chemical
affect
subsequent
during
assembly.
To
test
these
hypotheses,
collected
solutions
from
forb
or
grass
communities
evaluated
how
affected
growth,
biomass
allocation
functional
traits
(
Dianthus
deltoides
)
Festuca
rubra
).
Results
showed
that
metabolomes
differed
diversity.
While
did
not
have
any
effect
on
F
.
,
root
foraging
D
decreased
when
plants
received
community.
Structural
equation
modelling
reduced
exploration
arose
via
either
growth‐dependent
pathway
(forb
metabolome)
trait‐dependent
(grass
metabolome).
Reduced
was
connected
decrease
total
N
uptake.
Our
findings
reveal
can
create
belowground
effects
affecting
later
arriving
plants.
Evolution,
Journal Year:
2021,
Volume and Issue:
76(S1), P. 20 - 36
Published: Nov. 19, 2021
Why
do
infectious
diseases
erupt
in
some
host
populations
and
not
others?
This
question
has
spawned
independent
fields
of
research
evolution,
ecology,
public
health,
agriculture,
conservation.
In
the
search
for
environmental
genetic
factors
that
predict
variation
parasitism,
one
hypothesis
stands
out
its
generality
longevity:
genetically
homogeneous
are
more
likely
to
experience
severe
parasitism
than
diverse
populations.
this
perspective
piece,
I
draw
on
overlapping
ideas
from
evolutionary
biology,
conservation
capture
far-reaching
implications
link
between
diversity
disease.
first
summarize
development
results
experimental
tests.
Given
convincing
support
protective
effect
diversity,
then
address
following
questions:
(1)
Where
idea
been
put
use,
a
basic
applied
sense,
how
can
we
better
use
limit
disease
spread?
(2)
What
new
hypotheses
does
established
disease-diversity
relationship
compel
us
test?
conclude
monitoring,
preserving,
augmenting
is
our
most
promising
evolutionarily
informed
strategies
buffering
wild,
domesticated,
human
against
future
outbreaks.
Quantifying
the
contributions
of
possible
environmental
sources
("sources")
to
a
specific
microbial
community
("sink")
is
classical
problem
in
microbiology
known
as
source
tracking
(MST).
Solving
MST
will
not
only
help
us
understand
how
communities
were
formed,
but
also
have
far-reaching
applications
pollution
control,
public
health,
and
forensics.
methods
generally
fall
into
two
categories:
target-based
(focusing
on
detection
source-specific
indicator
species
or
chemicals);
community-based
(using
structure
measure
similarity
between
sink
samples
potential
environments).
As
next-generation
sequencing
becomes
standard
community-assessment
method
microbiology,
numerous
computational
methods,
referred
solvers
hereafter
been
developed
applied
various
real
datasets
demonstrate
their
utility
across
different
contexts.
Yet,
those
do
consider
interactions
priority
effects
communities.
Here,
we
revisit
performance
several
representative
solvers.
We
show
compelling
evidence
that
solving
using
existing
impractical
when
ecological
dynamics
plays
role
assembly.
In
particular,
clearly
presence
either
render
mathematically
unsolvable
for
further
analyze
data
from
fecal
microbiota
transplantation
studies,
finding
state-of-the-art
fail
identify
donors
most
recipients.
Finally,
perform
coalescence
experiments
sinks.
Our
findings
suggest
imposes
fundamental
challenges
MST.
Interpretation
results
should
be
done
cautiously.