"Things You Wouldn't Know If We Didn't Blog Intermittently."
That's BeautifulWhy do you think the foliage is greener in the center?Is it the distance from Saltspray?I don't think there an appreciable elevation difference.
I would guess it's different vegetation (palm trees vs scrub shrubs), but that's just a guess. If you go to Google images and scroll through a bunch of the Maldives hits, you can see some elevation changes, and some vegetation changes.
Perhaps it could also be a cloud shadow?