Population, Heath and Migration Flashcards
Demography
The study of human populations
arithmetic (crude) density
the total number of people per unit of area. Impacted by large areas that are uninhabitable. Most common way to measure
Physiological density
population per unit of cultivable (arable) land
Population growth rate (global)
~1$ per year (1.14% in 2018) if continue growth rate will have 16 billion in 54 years (doubling time)
Doubling time
the number of years required for the population of an area to double its present size, given the current rate of population growth
Where will population growth occur primarily
mostly in the less developed areas
less than 10% of births are in more developed world
what are consequences of population growth in the MDV vs LDW
MDW: less population growth, but greater environmental consequences –> consume and pollute more
LDW: high population impacts on access to food, healthcare, water, energy, ect–> poverty and conflict?
overpopulation
a belief that an area’s population exceeds the capacity of the environment to support life at a decent standard of living; can apply to local areas or the entire planet.
-recognition that the environment can only sustain a certain population size
-what does a “decent standard of living” mean- is that the same everywhere.
Carrying capacity
the maximum population that can be supported by a given set of resources and a given level of technology
catastrophists
those of the view that population increases and continuing environmental deterioration are leading to a nightmarish future of environmental catastrophe, including flooding, mass extinctions, food shortages, disease and conflict.
ie David Suzuki
Cornucopians
Those who argue that advances in science and technology, along with cultural adaptation will continue to create resources sufficient to support the growing world population and mitigate environmental change
ie Elon Musk
fertility
a population’s natrual capability of having children; measured by the number of live births produced by a woman
formula of population calculation
p1= po + (b-D)
po= baseline population- populationof particular place at a previous particular time
b-births since
D-deaths since
mortality
deaths as a component of population change
migration
The long term or permanent relocation of an individual or group of people from one area to another
formula of population- considering migration
P1= Po+ (B-D) + (I -E)
I= immigration since (came)
E= emigration since (left)
Crude birth rate (CBR)- formula + definition
total number of live births per year for every 1000 people already living
CBR= (B/P) x1000
b=births within time frame (year)
p= population at time (year)
True fertility
measures the number of children being born relative to the number of women in the population and the number of women in child bearing age (15-49)
General Fertility rate (Fecundity) (GFR)
GFR= (B/P(Fem 15-49)x 1000
the average number of childeren a women will have in her fecund years (15-49)
General fertility rate by region
world: 2.5
MDW: 1.6
LDW: 2.6
LeastDW: 4.3
Replacement-Level Fertility (replacement rate)
the level of fertility at which a population exactly replaces itself from one generation to the next- uses total fertility rate
-~2.1-2.5 (depends on level of development) (lower in MDW)
Factors influencing rates of fertility
Biological: age, nutrition, well-being, infertility
Economic: level of economic development
Cultural: complex interrelated factors ie marriage rates
Crude Death rate (CDR)
CDR= (D/P) x1000
-total number of deaths per year for every 1000 people
-does not account for the age of the population- older population will have higher CDR
Infant Mortality Rate
IMR= (D0-1/B) X
1000
D0-1–> number of deaths between 0-1 years that year
B- people birth that year
<10 in canda, japan, sweden, findand, ect
~100 in sierra Leone, Central African Rep,ect
Factors influencing average number of years of life
age of population
access to health care
Economic development
environmental condtions (water, sanitation)
Life expectancy
Average number of years an infant can expect to live (assuming current mortality rates)