Changes In The Forest

Question 1

How much has the Amazon basin lost in what

Answer 1

17% of primary forest in past 50 years

Question 2

Cattle ranching responsible for

Answer 2

80% of deforestation

Question 3

Impact of deforestation (4)

Answer 3

Rainfall reaches ground = runoff = flooding
Soil exposed = dry + vulnerable to erosion
Few trees = less interception = less transpiration and evaporation

Question 4

Regional impacts

Answer 4

Future deforestation = 20% decline in regional rainfall

Question 5

Local impacts

Answer 5

Replacement of trees by crops = less evaporation = less rainfall

Question 6

Vegetation breeze (3)

Answer 6

Air over cleared land warms faster = rises more quickly and creates localised low pressure= drawers moist air in from forested areas.
Increase in cloud coverage, thunderstorms and heavy rainfall over the cleared land
Soil erosion as increased surface flow discharges into local river systems.