I've spent the past two weeks trying to figure out which test to use and have gotten nowhere so hoping someone here can help! I have been given data for 4 sites, where the percentages were recorded for a number of variables, including leaf litter cover, rhododendron cover, light availability, bare ground exposure, etc. For each site I have three measurements per variable.

The aim is to see whether there is a significant difference in habitat structure between the 4 sites, so I would like to do a test where multiple factors can be compared at once. I read that if it's percentage cover it is likely to need a non-parametric test so not sure if that's correct? I've come up with MANCOVA and Kruksall Wallis but don't know if I'm even heading in the right direction?

The other problem is that most stats packages I find seem to only compare up to three variables at once. Any suggestions greatly appreciated!