Coevolution Flashcards
Evolution by natural selection is measured?
directly
Evolution by natural selection is inferred by?
organismal fit to environment
How is evolution by natural selection studied historically?
by phylogenies
Coevolution?
when two or more species are not only interacting but evolving in response to each other.
requirements for co-evolution? 2*
*selective pressures for both organisms
*they are evolving in response to each other
One important feature for coevolution is that?
the selective environment is constantly changing.
when does coevolution occur?
strongest when there is a close ecological relationship between two or more organisms.
ecological relationships that give rise to coevolution? 4*
*predation
*herbivore
*mutualistic
*competitor
formal definition of coevolution?
it occurs when there is a reciprocal genetic change in interaction species, owing to natural selection imposed by each on the other.
the arms race?
A form of coevolution that can be graphed like this:
x-axis: time
y-axis: trait investment in exploitative ability or defence.
Host specificity drives?
Coevolution
Coevolution escalation?
When one species evolve to select other species out in such a way that the desired species evolve traits to specialize on an interaction.
