Part 11 Indirect threats to the taiga forest Flashcards
1
Q
What are the indirect threats to the taiga forest?
A
acid precipitation
forest fires
pests and diseases
2
Q
2. What are forest fires?
A
a. When the forest catches fire
3
Q
- Are forest fires natural?
A
a. Yes
4
Q
- Why are forest fires important?
A
a. Some trees need them in order to grow b. They increase biodiversity
5
Q
- Why are there more fires recently?
A
a. Global warming
6
Q
- Why is it a problem if there are more fires?
A
a. Trees cannot grow back fast enough b. Birds and animals don’t have enough food c. Biodiversity is reduced
7
Q
- Where have there been more fires?
A
a. Alaska b. Russia
8
Q
- What are pests and diseases?
A
a. Insects which kill trees
9
Q
- Why are there more pests than there used to be?
A
a. The winters are not cold so they do not die
10
Q
- Why are pests and diseases a problem?
A
a. They reduce biodiversity b. There is less food for animals
11
Q
- Give an example of a pest
A
a. The spruce bark beetle
12
Q
- How much damage has the spruce bark beetle done?
A
a. Destroyed 2.5 million hectares of spruce in Alaska
13
Q
- What is acid precipitation?
A
a. When rain or snow is acidic
14
Q
- What makes acid precipitation?
A
a. Pollution from factories and cars
15
Q
- Which chemicals make rain acid?
A
a. Sulphur dioxide b. Nitrogen dioxide
