Did you know a Balsam Fir can bury itself, sort of

I was actually looking for information on growing a Hemlock in the Edmonton area when I cam across this article on the strategies of shade tolerant tree species. It is really odd to think of a small Balsam Fir you pass in the forest that is only 10 cm - 20 cm in diameter, could be more than 100 years old. And this is a common strategy among the shade tolerant tree species. Very cool