High number of "MSC service thread" in JBoss 6.1 EAP

Hi,

I have a vanilla jboss eap 6.1 but starting it up, I get 256 "MSC service thread" fired up. starting from 1-1 to 1-256.
I have a limited resource and want to minimise thread count per JVM.

What's the reason for so many threads? what do they do? Is it safe to reduce the number? If positive, how can I do that?

Regards,
Amin