Does a biological invasion modify host immune responses to parasite infection?
Royal Society Open Science,
Journal Year:
2025,
Volume and Issue:
12(1)
Published: Jan. 1, 2025
Biological
invasions
can
disrupt
the
close
and
longstanding
coevolved
relationships
between
host
parasites.
At
same
time,
shifting
selective
forces
acting
on
demography
during
invasion
result
in
rapid
evolution
of
traits
both
parasite.
Hosts
at
front
may
reduce
investment
into
costly
immune
defences
redistribute
those
resources
to
other
fitness-enhancing
traits.
Parasites
have
reduced
pathogenicity
because
that
negatively
impact
dispersal
are
left
behind
expanding
range.
The
host's
system
is
its
primary
arsenal
coevolutionary
'arms
race'
with
To
assess
effects
history
responses
parasite
infection,
we
conducted
a
cross-infection
experiment
which
paired
common-garden
reared
cane
toads
lungworm
parasites
originating
from
various
sites
their
invaded
range
across
northern
Australia.
Infected
had
larger
spleens
higher
concentrations
eosinophils
than
did
uninfected
toads.
also
exhibited
lower
bacteria-killing
ability,
perhaps
reflecting
trade-off
towards
more
specifically
anthelminthic.
infection
intensity
multiple
measures
differed
among
different
parts
trajectory,
supporting
hypothesis
has
disrupted
patterns
local
adaptation.
Language: Английский
Dispersal and gene flow in anadromous salmonids: A systematic review
Ecology Of Freshwater Fish,
Journal Year:
2024,
Volume and Issue:
33(4)
Published: Aug. 19, 2024
Abstract
Dispersal
is
a
ubiquitous
ecological
process
that
has
been
extensively
studied
in
many
plants
and
animals.
Anadromous
salmonids
are
an
interesting
system
for
examining
dispersal,
part
because
of
their
well‐known
philopatric
behaviour,
but
also
the
conservation
challenges
related
to
dispersal
hatchery‐origin
fish.
Building
on
earlier
work,
we
provide
updated
systematic
review
gene
flow
anadromous
salmonids.
In
particular,
compared
studies
from
wild
hatchery
origins,
including
providing
estimates
rates,
observations
results
modelling
studies.
We
reviewed
228
found
these
were
unevenly
distributed
among
species,
with
Atlantic
salmon,
Chinook
salmon
sea
trout
being
well‐represented.
Our
showcase
considerable
variability
estimated
rates
within
across
studies,
which
likely
different
methodologies,
propensities
species
populations,
spatial
extents
considered.
Overall,
our
confirmed
higher
tendency
fish
disperse
relative
fish,
some
variation
warrants
further
study.
Moreover,
propensity
tended
decline
exponentially
distance
drivers
varied
considerably
Additionally,
highlight
various
facets
captured
this
suite
terminology,
methods
metrics
characterising
spatio‐temporal
scales
Finally,
revealed
few
considered,
even
fewer
assessed,
implications
management
Language: Английский
Dispersal and gene flow in anadromous salmonids: a systematic review
bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2024,
Volume and Issue:
unknown
Published: Feb. 15, 2024
Abstract
Dispersal
is
a
ubiquitous
ecological
process
that
has
been
extensively
studied
in
many
plants
and
animals.
Anadromous
salmonids
are
an
interesting
system
for
examining
dispersal,
part
because
of
their
well-known
philopatric
behavior,
but
also
the
conservation
challenges
related
to
dispersal
hatchery-origin
fish.
Building
on
earlier
work,
we
provide
updated
systematic
review
gene
flow
anadromous
salmonids.
In
particular,
compared
studies
from
wild
hatchery
origins,
including
providing
estimates
rates,
observations
results
modelling
studies.
We
reviewed
228
found
these
were
unevenly
distributed
among
species,
with
Atlantic
salmon,
Chinook
sea
trout
being
well-represented.
Our
showcase
considerable
variability
estimated
rates
within
across
studies,
which
likely
different
methodologies,
propensities
species
populations,
spatial
extents
considered.
Overall,
our
confirmed
higher
tendency
fish
disperse
relative
fish,
some
variation
warrants
further
study.
Moreover,
propensity
tended
decline
exponentially
distance,
drivers
varied
considerably
Additionally,
highlight
various
facets
captured
this
suite
terminology,
methods
metrics
characterizing
spatio-temporal
scales
Finally,
revealed
few
considered,
even
fewer
assessed,
implications
management
Language: Английский
Species interactions and eco-evolutionary dynamics of dispersal: the diversity dependence of dispersal
Philosophical Transactions of the Royal Society B Biological Sciences,
Journal Year:
2024,
Volume and Issue:
379(1907)
Published: June 24, 2024
Dispersal
plays
a
pivotal
role
in
the
eco-evolutionary
dynamics
of
spatially
structured
populations,
communities
and
ecosystems.
As
an
individual-based
trait,
dispersal
is
subject
to
both
plasticity
evolution.
Its
dependence
on
conditions
context
well
understood
within
single-species
metapopulations.
However,
species
do
not
exist
isolation;
they
interact
locally
through
various
horizontal
vertical
interactions.
While
significance
interactions
recognized
for
coexistence
food
web
functioning,
our
understanding
their
influence
regional
dynamics,
such
as
impact
spatial
metacommunities
meta-food
webs,
remains
limited.
Building
upon
insights
from
behavioural
community
ecology,
we
aim
elucidate
biodiversity
driver
outcome
connectivity.
By
synthesizing
conceptual,
theoretical
empirical
contributions
global
experts
field,
seek
explore
how
more
mechanistic
diversity–dispersal
relationships
influences
distribution
temporally
changing
environments.
Our
findings
highlight
importance
explicitly
considering
interspecific
drivers
dispersal,
thus
reshaping
fundamental
including
emergent
meta-ecosystems.
We
envision
that
this
initiative
will
pave
way
advanced
forecasting
approaches
under
pressures
change.
This
article
part
theme
issue
‘Diversity-dependence
dispersal:
determine
dynamics’.
Language: Английский
Co-evolution of host dispersal and parasite virulence in complex landscapes.
bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 31, 2024
Abstract
Spatial
network
structure
impacts
the
ecological
and
evolutionary
dynamics
of
species
interactions.
Previous
work
on
host-parasite
systems
has
shown
that
parasite
virulence
is
driven
by
dispersal
rates
spatial
structure,
assuming
an
ecologically
fixed
parameter.
However,
also
a
trait
under
selection
can
evolve.
In
this
context,
we
develop
individual-based
eco-evolutionary
model,
in
which
both
host
evolve
representative
terrestrial
(random-geometric
graphs;
RGGs)
riverine
aquatic
(optimal
channel
networks;
OCNs)
landscapes.
We
find
landscapes,
evolutionarily
stable
(ES)
are
lower
ES
greater
relative
to
landscapes
when
mortality
low.
When
high,
values
landscape
types.
Diverging
co-evolutionary
patterns
between
explained
differences
topology.
Specifically,
highly
heterogeneous
degree
distribution
1)
leads
low
relatedness
allowing
for
evolution
2)
heterogeneity
densities
constrains
values.
Our
highlights
importance
considering
concurrent
co-evolution
studying
complex
Language: Английский