Specie e speciazione
Specie e speciazione
Specie e speciazione
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Speciazione allopatrica per dispersione (spec. peripatrica) in drosofile hawaiane<br />
• Over 500 endemic species in 2 genera<br />
• Occupy a wide variety of ecological niches<br />
• Many species have ranges restricted to single islands<br />
• One of the most famous adaptive radiations<br />
• “Founder hypothesis” – one gravid female (or a few individuals) disperse to another island and<br />
start a new isolated population<br />
• Predictions:<br />
– Closely related species should tend to be on neighboring islands<br />
– At least some phylogenetic branching sequences should correspond to the sequence in which<br />
islands were formed<br />
DeSalle and Giddings 1986)