quiz 9 Flashcards
Evidence for animals in hot deserts being nocturnal
fenec foxes are notcurnal
Evidence for animals in hot deserts having big ears
Fenec foxes have large ears
NoBa for animals in hot deserts being nocturnal
This not only allows them to hunt at night but further they are sleeping when temperatures are hottest
NoBa for animals in hot deserts having big ears
The large surface area not only keeps them cool but further helps them to hear when predators are coming
3 managment strategies used to reduce the risk of desertification
afforestation,drip irrigation and rotating crops
Evidence for afforestation
The great green wall is a tree planting project being set up on the edge of the sahara desert
Evidence for drip irrigatiioon
using a pipe with small holes that only release small amounts of water continuously for plants to grow
How does rotating crops reduce risk of desertfication?(evidence)
when areas of land are left to rest in between grazing animals or rotating crops
NoBa for afforestation
This not only decrease soil erosion as the tree roots stabilise the soil but further the trees provide shade reducing temperatures and evaporation rates making the growth of crops easier
NoBa for drip irrigation
This not only means less water is used but consequently the soil is not eroded by lots of water being added at once
NoBa for rotating crops
This not only means that land is allowed to recover their nutrients but further are not being continually removed
What are the 2 causes for desertification?
climate change and human activites
What are the human causes of deserfication?
population growth and removal of fuel wood
what are the 2 factors of climate change that cause desertification?
rainfall and temperatures
How does rainfall affect desertification?
climate change reduces rainfall in areas that are already dry. Less rain means less water available for plant growth, so more plants die
How does temperatures affect desertification?
higher temperatures cause more water to evaporate from the land. This makes soils drier, so plants struggle to grow
How does population growth causes desertification? (Evidence)
increase pressure on food production has caused over-cultivation and overgrazing
what is overgrazing?
too many animals eat plants from the soil
what is over-cultivation?
too many crops are grown in the same area
Evidence for removal of fuel wood
many people in arid areas rely on wood as fuel for cooking
