Wood species for Earth Integrated Structures

Hello all,

I'm going to build an earth integrated structure as in Mike Oehler's  'The $50 and up underground house book'
will be using John Hait's insulative umbrella concept as well.

I'm having trouble with confidence in wood species to use however.

I have access to about 20 Larch poles ranging in diameter of ~ 6" to 11". Lengths at 10ft. to 20ft.
I also have on site Beech trees, Oaks & Maples.

Mike mentions Larch as a good example however, I don't have enough Larch to do all the posts, beams & girders.
Could Beech, Oak, and/or Maple be used successfully underground if treated somehow?

I'm guessing that the insulative umbrella would significantly reduce wood rot right? In that case, does wood species matter so much?