According to the instructor why is periodic f
问题详情
According to the instructor, why is periodic fire necessary to forest ecosystems？ Click on two answers.
A．Fire releases nutrients into the soil.
B．Fire creates employment for firefighters.
C．Fire controls insect pests that harm trees.
D．Fire reduces water and air pollution.请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：AC
解析：According to the instructor, why is periodic fire necessary to forest ecosystems?
Periodic fire is necessary to forest ecosystems because it releases nutrients into the soil. The instructor says Fire removes nutrients from standing dead trees and returns them to the earth, where they become available to the root systems of new trees. Fire also controls insect pests that harm trees. The instructor says Fire is nature's way of controlling insect infestations; ... the heat kills off great numbers of beetles and larvae, providing a natural method of pest control. (2.2)
