Desertification Flashcards

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1
Q

decertification definition

A

the process of turning into a dessert (sahel)

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2
Q

human causes of desertification

A
overgrazing
over cultivation
deforestation
population growth
toyotarisation
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3
Q

causes

overgrazing

A

too much livestock
all vegetation is eaten
ground susceptible to wind and water erosion

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4
Q

causes

overcultivation

A

farming too intensively
no fallow periods
all nutrients lost

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5
Q

causes

deforestation

A

land receives less nutrients
vulnerable to erosion as there is no interception
less stability because tree roots have been removed

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6
Q

causes

population growth

A

more food production

more pressure on the land

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7
Q

physics caused of desertification

A

rising temps
falling rainfall
flash floods
wind

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8
Q

causes

rising temps

A

global temperatures increase
plants are harder to grow
reduces vegetation cover

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9
Q

causes

falling rainfall

A

increasingly hard for vegetation to grow

ground more vulnerable to wind erosion

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10
Q

causes flash floods

A

intense periods of rainfall erode topsoil

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11
Q

causes

wind

A

wind erosion increases

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