Exam 2-Chapter 8 Flashcards
Demographic transition graph-Phase 2
Epidemiologic transition-Declining CDR and high CBR results in rapid pop. growth
How do limiting factors affect population size?
Using up non-renewable resources/pollution/limited land & fisheries/lost ecosystem services
Why is J-curve unique to humans given that we are k-strategists?
exponential growth like r-strategists but high parental care and late reproduction like k-strategists
Demographic transition graph-Phase 1
Primitive stability-High crude birth rate (CBR) is offset by high crude death rate (CDR)
What does the human population growth curve look like?
J-Shaped curve (could be S-curved by 2100)
What are some negative effects of wealth?
Waste increases/problems pushed to poorer nations like importing resources.
What are the effects of agricultural/industrial revolutions on our population growth and why?
Settlements, technology like tools, trade, food storage/reduced mortality + food = population growth/mostly removed death from predators/famine
Demographic transition graph-Phase 4
Modern stability is reached/CDR and CBR are both low
How do you determine if a population is shrinking/growing/stable?
TFR=2.0 is stable/TFR>2.0 is growing/TFR < 2.0 is shrinking
What are some positive effects of wealth?
Technology=lower pollution/clean water/minimize degradation.
How have humans affected their carrying capacities?
By technology/agriculture/trade/fossil fuels/medicine
What is total fertility rate (TFR)?
Average number of kids each woman has over her lifetime
observed general trend in population growth rates between developed vs. developing countries
developing have higher population growth. 81 mil/yr vs. 1 mil/yr
Demographic transition graph-Phase 3
Fertility rates declining-population growth is still significant
