@Bozostein Or it might be population dynamics... I'm not exactly sure what "mathematical ecology" is, but when I hear "environmental science" I think of something much less quantitative, involving more field work.
@Szabolcs: Note that i didn't say it is trivial. Neither mathematicians nor physicistswould be well-paid for doing trivial things. The point is that they apply their methodological knoledge in an area that is not math or physics, respectively.
@Bozostein: Type the subject into books.google.com and you'll see that there are a number og bokks on it, the first published in 1977.
