module 1 Flashcards
(29 cards)
- refers to the entire number of people of all ages, living in all countries throughout the world.
GLOBAL POPULATION
– the study of human populations
DEMOGRAPHY
– collect and process information about population processes such as fertility, mortality, and migration.
DEMOGRAPHERS
The world population, or the total number of humans currently living, is estimated to have reached ____________ as of ___________.
7.5 billions
April 2017
To date, the absolute growth rate of humans has stabilized at __________– this means that approximately _________are born every minute.
1.1% per year
150 babies
•can be generally defined as a group of individuals of the same species occupying a given area at a given time.
•change over time.
•grow and shrink and the age and gender composition also change through time and in response to changing environmental conditions.
POPULATION
-is the study of populations and their interactions with their environment.
-Understanding the dynamics of human population requires knowledge of the general principles of population ecology.
Population Ecology
The subject of population ecology as a means
to understand the influence of populations to the environment.
– is the pattern of spacing among individuals within the boundaries of the population.
DISPERSION
three types of DISPERSION
-CLUMPED PATTERN
-UNIFORMLY PATTERN
-RANDOM PATTERN
– is the most common pattern of population dispersion.
CLUMPED PATTERN
-when individuals are evenly spaced over the area they occupy. A pattern seen in species whose individuals do not have close interactions.
UNIFORMLY PATTERN
– individuals of a population have an unpredictable distribution. This pattern is common in species that prefer solitary lives.
RANDOM PATTERN
-represents the maximum population size that a particular environment can support
Carrying capacity
humans developed the ability to expand into diverse new habitats and different climate zones.
First
the emergence of early and modern agriculture allowed more people to be fed for each unit of land area farmed.
Second
the development of sanitation systems, antibiotics, and vaccines helped control infectious disease agents.
Third
– is the actual level of reproduction of a population per individual, based on the number of live births that occur.
FERTILITY
also known as birth rate is the total number of live humans births per 1,000 population divided by the length of a period in years.
FERTILITY RATE
also known as death rate is a measure of the number of deaths in particular population, scaled to the size of that population per unit of time.
MORTALITY RATE
– the act of someone coming to live permanently in foreign country
IMMIGRATION (INTO)
– leaving own country to settle permanently to another country.
EMIGRATION (EXIT)(OUT)
- is the average number of children born to each woman, over the woman’s lifespan, in a population.
TOTAL FERTILITY RATE
-It is an accelerating pattern of increasing population size
-According to Malthus model once the population size exceeds available resources, population growth decreases dramatically.
EXPONENTIAL GROWTH