-This region of Iceland once was covered with forests.However,humans logged the trees and grazed sheep on the logged regions,preventing natural regeneration.This situation,in which one ecosystem has now been converted to another,represents
A)a tipping point for this ecosystem.
B)the power of natural resilience mechanisms.
C)reverse ecological succession.
D)a sustainable approach to ecosystem management.

Question

-This region of Iceland once was covered with forests.However,humans logged the trees and grazed sheep on the logged regions,preventing natural regeneration.This situation,in which one ecosystem has now been converted to another,represents
A)a tipping point for this ecosystem. 
B)the power of natural resilience mechanisms. 
C)reverse ecological succession. 
D)a sustainable approach to ecosystem management.

Quizplus · Accepted Answer

A tipping point for this ecosystem is reached when the original forest ecosystem is so altered by human activities (logging and grazing) that it cannot recover to its original state, leading to a permanent change to a different ecosystem.

-This Region of Iceland Once Was Covered with Forests