DEMOGRAPHY

10.000

DEMOGRAPHY

1.000

Historians demographers are interested in investigating the effects of massive demographic losses (deaths), such as the effects of the plague outbreaks in mid-fourteenth century Europe on the later medieval economy and values, or the consequences for New World civilizations of the introduction of Old World diseases into the Americas.

The mayor concern right now is something called: Population explosion. Which is the interplay between population and economic development, the effects of birth control, urban congestion, illegal immigration, and labour force statistics. Or in different words: How many people exist right now and how many natural resources are left today? Census Natural resources

Demography is very interesting when you start studying because it will try to answer the questions of how many people exist? and how many natural resources can we take from it?

Mortality, fertility, and migration are the ones that contribute to population change.

Population elements and movements Population size: Number of individuals present in a place. It might look simple but actually, the simplicity is in its concept, locating all individuals during a census is nearly impossible. Population density: This term also works hand in hand with the population size. Is the size of a population about the amount of space that it occupies. Density in this case is the number of individuals per unit area or volume. Age structure: The individuals are classified into age-specific categories called cohorts, such as "juveniles" or "subadults" to determine the reproductive potential of that population, in order to estimate how many people exist currently and in the future. Fecundity: It describes the number of children an individual or a population is able to produce during a given period of time. This number is not accurate because every ecosystem implements constraints on its populations. Mortality: The death rate is the measure of individual deaths in a population and it also helps to compensate for fecundity. Like fecundity, mortality is measured in rates, usually expressed as the number of individuals that die in a given period, deaths per unit time. Once again, this number is not accurate because it varies over time based on dynamics internal and external to the population.

Explain with your own words:1. What “population explosion” means? 2. How do you think we can help to protect the natural resources?