Population Density, Structure and Migration Impacts
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Population Density and Settlement Factors
Densely: (pleasant climate, + more jobs / food supply, water supply, flat land, railways & ports)
Sparsely: (hot-cold, wet-dry, weak industry & jobs, lack of investments, slopes)
Structure: (population / 5-year group, % people per group, % male-female, change - life expectancy, birth, death, infant, proportion young, effects of migration)
Types of Population Pyramids
- Stable pyramid: Shows unchanging fertility and mortality.
- Expansive: Wide at the base; high individual birth & death rates.
- Stationary: Low fertility & mortality; population size roughly constant.
- Contractive: More common with emigration out; typical of developed populations; description of shape.
Key Demographic Indicators
Pd: nº inhabitants / km²
BR: nº births / nº inhabitants
FR: nº births / nº women (15–49)
DR: nº deaths / nº inhabitants
RNI: (nº births - nº deaths) / nº inhabitants × 100
Types and Causes of Migration
Nature, duration, place
- Economic: jobs, wages, working conditions
- Social: quality of life, standard of living, family
- Political: wars, persecution
- Environmental: natural reasons
Migration Effects on Origin and Destination
Migration — Origin:
- (+) Reduces employment pressure
- (+) Sends money (remittances)
- (-) Families may be broken
- (-) Structure of population changes
Migration — Destination country:
- (+) Younger population & death rate changes
- (+) Increase in taxpayers
- (+) Immigrant work contributes to the economy
- (-) Increased pressure on health care, education and other services
- (-) Poor living conditions, potential conflicts
Repeated Notes (Original Formatting)
Densely: (pleasant climate, + more / jobs, food supply, water supply, flat, railways & ports)
Sparsely: (hot-cold, wet-dry, weak industry & jobs, lack of investments, slopes)
Structure (population / 5-year group, % people per group, % male-female, change - life expectancy, birth, death, infant, proportion young, effects migration)
Stable pyramid: Show unchanging fertility and mortality
Expansive: wide at base, individual birth & death Stationary: low fertility & mortality
Contractive: + common (emigration out). developed, description of shape
Pd: nº inhabitants / km² BR: nº births / nº inhabitants FR: nº births / nº women (15-49) DR: nº deaths / nº inhabitants RNI: (nº births - nº deaths) / nº inhabitants × 100
Nature, duration, place
Econ: jobs, wages, working Social: quality of life, standard, family Political: wars, persecution Environmental: natural reasons
Migration origin: (+) reduces employment pressure, sends money (-) family broken, structure of population change
Destination country: (+) young population & death rate changes, taxpayers increase, immigrant work contributes (-) increased health care, education and other pressures, poor living conditions, conflicts