$1:
After almost a decade of maturation, scientists measured the carbon absorption and storage abilities of the different tree stands. The miniature forest with the most diverse mix of trees stored twice as much carbon as the least diverse, the stand with only a single species.
This makes a lot of sense.
$1:
When forests take-up more carbon, it is a sign of greater productivity and health. A diversity of tree species provide food and shelter for a wider variety of animals.
I've noticed this on a lot of my recent hikes through forests with a greater variety of trees and plant life. A greater array of animals and insects (and snakes) that populate the area and contribute to it's sustainability.
My last couple of hikes through one particular area was quite rewarding as well as a learning experience, having seen some species that would be harder to find in a basic forest or even simple parkland.
-J.