Managment Of Ecoystems Flashcards
1
Q
Give some factors about how ecosystems are under threat?
A
- global warming (water temp. increases)
- deforestation
- droughts
- pollution/lottering
- extinction
- acidification of oceans
- sea level rising
2
Q
What is deforestation?
A
Deforestation is the large-scale removal of trees where the land is thereafter converted into non-forest use
3
Q
When trees are cut down they release ……….. into the atmosphere which contributes to ………..
A
carbon dioxide, global warming
4
Q
What are the ways that deforestation takes place?
A
- trees are burned
- heavy machinery
- chainsaw
5
Q
What are the effects of deforestation?
A
- contributes to global warming
- soil erosion
- loss of biodervisty
- changes to the water cycle
6
Q
What are the causes of deforestation?
A
- commercial logging (cutting trees into logs for furniture)
- commercial farming (cutting trees for palm oil)
- substinance farming (people cut down trees to sell them and get money for food)
7
Q
How can we manage our forests?
A
- selective cutting
- new technology
- village/urban forestry
- national park
- machinery size
8
Q
What is desertification?
A
Desertification is the process of land turning into a desert over time as the quality of the soil declines
9
Q
What are the causes of desertification?
A
- deforestation
- overpopulation/over cultivation
- droughts/hot weather
- over grazing
10
Q
What are the effects of desertification?
A
- famine & death
- increase fire rates
- less biodiversity
- outmigration
- income loss/wasteland
- soil erosion
- species extinction
11
Q
What are some solutions to desertification?
A
- improved farming services
- contour farming on slopes
- afforestation projects
