Pacific islands

[John Curnutt <curnutt@xxxxxxxxxxxxxxxxxx>]

Hello,
I'm looking at pre-historic (before European) extinctions of birds on 
Pacific Islands. Polynesia and Micronesia were invaded by humans only 
within the last 4K years. I assumed that subfossil birds found on 
these islands had to be extirpated by humans but Paul Delcourt here at 
UT says that I should look at the possibility of climate change as a 
factor.
Does anyone know of any sources for that would help me out?

Thanks, John Curnutt