Hi Lindsey,

Based on what I can see in the photo, your tree is displaying normal fall needle-loss.  Conifers lose their oldest needles in the fall as the deciduous trees are dropping their leaves.  

No special action is required.
  Because it's a new tree, do be sure that it doesn't dry out over the winter (check the root ball with your finger when temperatures are warm and conditions are dry; water if the top inch or so is dry and it's above 40F).

Cordially,

John