Unit 2: Population and Migration Flashcards
Carrying capacity
the number of people an area can support on a sustained basis given the prevailing technology.
Cohort
a group of individuals who share a common temporal demographic experience; not necessarily bases only on age, but may also be defined based on criteria such as time of marriage or time of graduation; all individuals in a certain age range
Demographic equation
summarizes the contribution made to regional population change over time by the combination of natural change (difference between births and deaths) and net migration (difference between in-migration and out-migration) Formula for population change: P2 = P1 + B - D + I - O with P1 = population in time 1, P2 = population in time 2, B = births, D = deaths, I = in-migrants, and O = out-migrants
Demographic momentum
(population momentum) the tendency for population growth to continue despite stringent family planning programs because of a relatively high concentration of people in the childbearing years.
Demographic regions and Population distributions
- 72.7% in Eurasia, 2. 7.9% in North America, 3. 13.2% in Africa, 4. 5.7% in South America, and 5. .5% in Australia and Oceania. With 21% in China, 17% in India, and only 4.6% in the United States. One in five humans lives in one valley in one province of China: Red Basin of Sichuan.
Most of the population lives in lower elevations and temperate climates,
Most of the population lives a long one longitude line across North America, Europe, and Northern China.
Demographic Transition
the process of change in a society’s population from a condition of high crude birth and death rates and low rate of natural increase to a condition of low crude birth and death rates, low rate of natural increase, and a higher total population.
Dependency ratio
a simple measure of the number of economic dependents, old or young, that each 100 people in the productive years (usually 15-64) must support. Population pyramids give quick visual evidence of that ratio.
High dependency ratio = increased pressure on the working age
Usually:
High youth ratio = low income countries, in stage 2-3 of DTM
High elder ratio = high income, in state 5
Diaspora
scattered settlements of a particular national group living abroad.
Diffusion of fertility control
how fertility rates are lowered; during the final two stages of the demographic transition depend on both the successful cultural diffusion of effective methods of birth control and the widespread acceptance of the notion that small families are preferable to large ones; fertility decline became accepted as countries industrialized largely because children were no longer needed to help with farm work.
Disease diffusion
epidemiology: branch of medical science concerned with the incidence, distribution, and control of diseases that affect large numbers of people; uses geographic concepts to understand the distribution and method of diffusion of diseases; one might expect all diseases to spread exclusively by contagious diffusion, in fact they spread through all types of diffusion: relocation in the forms of tourism, long-distance truck drivers; hierarchical such as AIDS in urban areas.
Doubling time
the number of years needed to double a population, assuming a constant rate of natural increase.
Ecumene
that part of the earth’s surface physically suitable for permanent human settlement; the permanently inhabited areas of the earth
Epidemiological Transition Model
distinctive causes of death in each stage of the demographic transition; stage s1 and 2 are the stages of pestilence and famine, infectious and parasitic diseases, and accidents and attacks by animals and other humans; stages 3 and 4 are the stages of degenerative and human-created diseases, e.g., cardiovascular diseases and cancer; stage 5 is the stage of reemergence of infectious and parasitic diseases.
Fertility
the natural capability to produce offspring.
Gender roles
culturally specific notions of what it means to be a man and what it means to be a woman, are closely tied to how many children are produced by couples
Geodemography
population geography, the study of the spatial and ecological aspects of population, including density, distribution, fertility, gender, living standard, health, age, nutrition, mortality, and mobility.
Infant mortality rate
the number of infants per 1,000 live births who die before reaching one year of age
Best example of a country’s healthcare, peripheral has the highest, core the lowest
J- Curve
a curve depicting exponential or geometric growth
Maladaptation
an adaptation that is less helpful than harmful; It can also signify an adaptation that, whilst reasonable at the time, has become less and less suitable and more of a problem or hindrance in its own right, as time goes on. This is because it is possible for an adaptation to be poorly selected or become less appropriate or even become on balance more of a dysfunction than a positive adaptation, over time
Morality
death rate, the number o deaths per year per thousand population
Below 10 in 1000 is low, above 20 is high
CDR is declining because of increase in life expectancy
Places in Europe might have higher CDRs because of a high elder population, but the CDR does not differentiate between deaths due to old age or conflict/poverty
Birth Rate
birth rate, the number of live births per year per thousand population.
Lowest in Europe, highest in Africa because of things like healthcare, wealth, and gender roles
Neo-Malthusian
argue two main points: 1. the gap between population growth and resources is wider in some countries; 2. the world population growth is outstripping a wide variety of resources , not just food production; viewpoint held that in order to lift living standards, the existing national efforts to lower mortality rates had to be balanced by governmental programs to reduce birth rates
Overpopulation
the number of people in an area exceeds the capacity of the environment to support life at a decent standard of living
Pandemic
a disease that occurs over a wide geographic area and affects a high proportion of the population.