The transition from sugar pine to white fir forests in California was caused mainly by:
A)volcanic eruptions.
B)frequent earthquakes.
C)logging.
D)reduced numbers of forest fires.
E)reduced numbers of settlers.

Question

Quizplus · Accepted Answer

The transition from sugar pine to white fir forests in California was mainly caused by reduced numbers of forest fires. Fire suppression policies allowed white fir, which is less fire-resistant, to thrive and outcompete sugar pine, which relies on periodic fires to maintain its dominance.

The Transition from Sugar Pine to White Fir Forests in California