3. Why can exotic species,
whose initial populations
are small, succeed to
establish themselves in
environments to which
they have no
opportunity to adapt
and even become more
abundant?
“Invasion paradox”
Sax & Brown 2000
15. Land
use
Shannon
diversity
index
Geologic
Shannon
diversity
index
%
Forest
%
Scrub
%
Agriculture
%
Urban
land
use
%
Bare
soil
No.
habitats
Altitudinal
range
Distance
to
main
roads
Distance
to
main
cities
Distance
to
main
rivers
Population
density
Fire
frequency
Distance
to
the
sea
Solar
Radiation
Mean
January
temperature
Mean
July
temperature
Mean
annual
temperature
January
precipitation
July
precipitation
Annual
precipitation
Mean
altitude
Heterogeneity
Anthropogenic
Climatic
45. Rmax: Fecundity, Age at first breeding & lifespan
Cole 1954
Which Life history traits confers a fast
population growth?
Clutch*broods
46. Rmax: Fecundity, Age at first breeding & lifespan
Cole 1954
5 10 15
123456
d$Clutch
d$RmaxRmax
Clutch
Which Life history traits confers a fast
population growth?
48. However, Rmax do not
predict invasion success...
b c
e f
10 15
ch size
-2 -1 0 1
-3-2-10123
Fast-Slow
2 4 6
-3-2-10123
Body m
3
3
Invasionpotential
Rmax
1 2 3 4
53. Invasionpotentia
d e
5 10 15
Clutch size
-2 -1
Fast
-2.2 -1.8 -1.4 -1.0
-3-2-10123
Brood value
-2 -1 0
-3-2-10123
Residual
Invasionpotential
54. LHT important, but in a different way
Invasionpotential
propagule pressure +
55. Invasionpotentialofspecies a b c
d e f
5 10 15
-3-2-10123
Clutch size
-2 -1 0 1
-3-2-10123
Fast-Slow
2 4 6 8 10
-3-2-10123
Body mass
-2.2 -1.8 -1.4 -1.0
-3-2-10123
Brood value
-2 -1 0 1 2 3
-3-2-10123
Residual brain size
1 2 3 4 5
-3-2-10123
Habitat generalism
LHT important, but in a different way
Invasionpotential
propagule pressure +
56. Invasionpotentialofspecies a b c
d e f
5 10 15
-3-2-10123
Clutch size
-2 -1 0 1
-3-2-10123
Fast-Slow
2 4 6 8 10
-3-2-10123
Body mass
-2.2 -1.8 -1.4 -1.0
-3-2-10123
Brood value
-2 -1 0 1 2 3
-3-2-10123
Residual brain size
1 2 3 4 5
-3-2-10123
Habitat generalism
LHT important, but in a different way
Invasionpotential
propagule pressure +
57. Invasionpotentialofspecies a b c
d e f
5 10 15
-3-2-10123
Clutch size
-2 -1 0 1
-3-2-10123
Fast-Slow
2 4 6 8 10
-3-2-10123
Body mass
-2.2 -1.8 -1.4 -1.0
-3-2-10123
Brood value
-2 -1 0 1 2 3
-3-2-10123
Residual brain size
1 2 3 4 5
-3-2-10123
Habitat generalism
LHT important, but in a different way
Invasionpotential
propagule pressure +
67. Not all communities are
equally resistant
Most invaders use empty or
disturbed habitats
Not all species are good
invaders
Most invaders have
behavioral or phenotypic
plasticity
“paradox”
Where?
Who?
68. Thank you
- nacho.bartomeus@gmail.com
Thanks to Co-Authors: Daniel Sol,Andrea Griffin,
Joan Pino, Xavier Font, PalomaVicente, Joan
Maspons, Josep Piñol, MiquelVall-llosera.
People at CREAF, Oriol Lapiedra, Cesar Lagos,...
69. 0 1 2
slow continuum
-2.2 -2.0 -1.8 -1.6 -1.4 -1.2 -1.0 -0.8
-2-10123
Brood value
ResidualBrain
Text