A conservation manager is planning to reintroduce collared lizards into an isolated glade in Missouri,
where she assumes they have gone locally extinct. Several other isolated glades in the region have
populations of collared lizards from which she can draw. Based on your understandings of
phylogenetics, provide arguments for why she should draw individuals from a single extant glade
population versus from multiple extant glade populations to repopulate the empty glade. What tools
might she use to make this decision?
What will be an ideal response?
First, the manager needs to determine how closely related the other populations of collared lizards are
to each other. If they have been isolated long enough to diverge into new taxa (subspecies or even new
species) then mixing individuals from different populations would not be productive. Morphological
observations (How different do they look?), behavioral observations (Do they still have the same
feeding, courtship, and reproductive patterns?), and genetic assessments (How much have their genetic
make-ups--either protein or DNA sequences--changed since isolation?) will provide information on the
degree to which each population has diverged from the others. Finally, a test of putting a few
individual males and females together in a controlled setting to see if they will successfully mate and
produce viable and fertile offspring will confirm if these groups can be introduced together to a new
location.
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