Comparing raster values inside vs outside a dissolved polygon layer

Discussion created by Chanel001 on Oct 5, 2012
Hi all,

I have a raster layer containing number of species in each grid cell.
I have overlaid a dissolved polygon layer of the protected areas network.
How can I calculate the number of species that are within the protected areas and compare it to the number of species that are outside of these protected areas?
I am not sure if Zonal Statistics is the way or not, and if it is, how?

Your help is greatly appreciated.

Kind regards,