7) Human Population dynamics Flashcards
Current human population growth ?
- 216 000/ day
- 83 million / year
What has caused the exponential growth ?
1) reduced environmental resistance
2) increased carrying capacity
3) food production has increased
a) monoculture
b) GM foods
c) fertilizer
4) methods of treating diseases
More developed countries ?
- slow population growth
- high standard of living
- late marriages
- birth control
- financial security
- 22% of population
- 90% of hazardous waste
Less developed countries?
- rapid population growth
- low standard of living
- many children
- lack of contraception
- will continue to grow (medicine )
A population pyramid consists of 3 sections ?
1) pre-reproductive (0-15)
2) reproductive (16-65)
3) post - reproductive (65+)
Rapidly growing population ?
1) high birth rate
2) high deaths dates
3) short life expectancy
4) less developed countries
stable population ?
- declining birth rate
- low death rate
- more people living to old age
- more develops counties
Declining population ?
- low birth rate
- low death rate
- longer life expectancy
What factors change population make-up ?
- HIV/AIDS
- reduced birth rates (economic crisis )
- young immigrants
- emigration
Ecological footprint ?
A measure of human demand on the earth’s ecosystem
Footprint accounts for ?
- carbon emissions from fossil fuels
- demand on food sources
- currently 2.7 gha per person
- capacity = 2.1 gha
Bio capacity ?
The amount of productive land and water available to produce the resources we use and to absorb the wastes we produces
Ecological debtor?
- ecological deficit
- more developed countries
- resources from other countries
Ecological creditor ?
- no ecological deficit
- less developed countries
- uses very little of the worlds resources
Natural resources under pressure ?
1) Towns and cities
2) Golf courses
3) Agriculture , forestry and mining
