BIO-8 Chapter Notes - Chapter 1: Phenology, Demographic Transition, Ecological Footprint
Document Summary
Populations tend to grow exponentially, resource availability grows linearly. Eventually, resource availability will limit growth and population will crash. Due to a decline in mortality rates with no accompanying decline in birth rates. The demographic transition not really change (relatively stable) Stage 1: pre-modern: high birth and death rates, human population sizes do. Stage 2: industrializing: society transforms through technology that reduces death rate but not birth rates. Stage 3: mature industrial: birth rates decreased, population growth levels out. Stage 4: post-industrial: birth and death rates both low. Due to improved hygiene, nutrition, clean water, vaccinations. Due to improved economic conditions, increasing education levels correlated. Birth rates are highest in impoverished countries with greater prosperity. Per capita gnp (gnp divided among total population) To maintain population sizes the average replacement is just above 2 live births per female. Above means an increasing population as more are being born than people are dying.
