Geography Q7

Question 1

Climate change impacts upon desert regions

Answer 1

the higher temperatures ( as much as 5°C ) - increase evaporation rates, reducing surface storage, impacting all sources of water.

Question 2

Less ephemeral, endoreic & exogenous water supplied

Answer 2

all sources of water expected to diminish.

Question 3

Increased atmospheric CO2

Answer 3

create potential imbalances in desert ecosystems.

Question 4

Imbalances in desert ecosystems

Answer 4

promote development of some species in wetter periods.

Question 5

Imbalances in desert ecosystems

Answer 5

radically altering local ecosystems, affecting both habitats, also ecological niches.

Question 6

Desertification spread at desert margins.

Answer 6

especially when combined with impact of population pressures.

Question 7

Challenges of desertification.

Answer 7

countered through small-scale water management schemes.

Question 8

Desertification impact on crop yields.

Answer 8

pastoral farming & availability of fuelwood.

Question 9

Soil erosion likely to be linked.

Answer 9

changes in the water balance.

Question 10

As evaporation exceeds precipitation for longer periods.

Answer 10

soil dries out rendering it