Question

What are some abiotic changes that might occur if the temperature of the tundra increased. The exact temperature doesn't matter, just enough to change the tundra.

Answer 1

Warmer temperatures would lengthen the growing season; therefore, the trees and other plants would grow taller. However, this may not be an abiotic change. But increased temperature surely would result in a different humidity and probably in more rain. That, in turn, could lead to more leaching, more run-off, more erosion, etc. I hope this addresses your question properly.