Forests Under Threat

Question 1

Emergent layer

Answer 1

At the top where trees have broken tbrough the dense canopy layer

Question 2

Canopy layer

Answer 2

Home to trees smakes and birds

Question 3

Understorey layer

Answer 3

Contains young trees and large leaves to capture sunlight

Question 4

Forest floor

Answer 4

Mamalls here

Question 5

How does the nutrient cycle work

Answer 5

Nutrients added to ecosystem by precipitaion and weathering
Then removed by runoff
Then taken up from the soil as plants
They then are returned when they dje

Question 6

Where are most the nutrients in tye tropical rainforest stored

Answer 6

In biomass

Question 7

What are effects if forest goes through deforestation

Answer 7

Litter snd soil easily eroded by heavy rains

Land cannot be farmed for long as rainforest soils contain few nutrients

Question 8

What is the basic energy source for all food webs

Answer 8

Sunlight

Question 9

Why is productivity low in the taiga

Answer 9

Dont reveive enough sunlight, high temperaturesand precipitation

Question 10

What are direct threats

Answer 10

Deliberate cutting down of trees for timber

Question 11

what is an indirect threat

Answer 11

Comes from pollution, global warming or disease

Question 12

What are the reaons for deforestation

Answer 12

Poverty
Debt
Economic development
Demand for resources

Question 13

What happens if climate increases by 3 degrees

Answer 13

20-50% of land species face extinction

Question 14

Where are tar sands foumd

Answer 14

Under an area of taiga

Question 15

What can tar sands hold

Answer 15

Estimated 1.7 trillion barrels of oil

Question 16

Describe the taigas climate

Answer 16

Short, wet summers of 3 months (20 degrees)
Long cold, dry winters
Low precipitation
Snow on ground for many months

Question 17

Why is biodiversity Low in the Taiga

Answer 17

As plants and animals can only survive if they are specially adapted to the cold climate

Question 18

What do CITES do to protect rainforests

Answer 18

Stop the buying and selling of endangered species to try stop illegal hunting and collecting

Question 19

Advantages of CITES

Answer 19

Many countries have signed up

Protected species include a wide variety of species

Question 20

Disadvantages of CITES

Answer 20

Protects species, not ecosystems, so does not prevent deforestation
Global warming could undermine its success

Question 21

What is REDD

Answer 21

projects whose purpose is to stop deforestation

Question 22

How do national parks help protect the taiga areas

Answer 22

Conservation takes priority over exploitation of resources by having privately owned land and legal protection

Question 23

What are reasons to conserve the taigas biodiversity

Answer 23

Culturally important to many indigenous people
Exploitation causes deforestation and pollution
One of the last untouched bio,we

Question 24

What are reasons to why the taiga should be exploited

Answer 24

Brings jobs and income to isolated areas
Resourced can be exported boosting national GDP
Some exploitation is renewable such as hydroelectric power