First of all, global warming is …show more content…
It increases the severity and frequency of drought generally. With climate change, resulting in an increasing risk of drought in the south and interior Canada (Yusa et al, 2015). Moreover, the CBC news reported that, depends on the tree ring data, B.C should expect future droughts to reach an extreme level of the past and more important is that climate change is one main factor which contributes to the drought effect (Li& Johnson, 2016). As we know, water is an important material for trees to grow. Lack of moisture can directly reduce the forest growth, even give rise to more dead trees. When it comes to indirect impacts, drought increases wildfire risk, since the dry trees makes the fuel more easier to fire. Drought also provide a suitable environment for phytophagous insects to grow. In other word, the host plant temperatures which is drought-related enable the insects to reproduce in an optimal way (Mattson & Haack,