Human Population Biology

Human Population Growth Video http://www.youtube.com/watch?v=9_9SutNmfFk

Human History For most of history, the human population grew slowly. In the past 500 years, the population began to grow rapidly, due to more technology and medical advances.

Human History

Demography: Looks at the characteristics of human populations and attempts to explain how they will change

Equation for Population Growth Birth Rate + Immigration – Death Rate – Emigration = Population Change Ex. What would happen if the death rate increased drastically and the immigration rate slightly increased?

Developing and Developed Countries   Developing Developed Number of people  4.8 Billion 1.2 Billion Income Economy Government and Community Support Population Growth

Developing and Developed Countries   Developing Developed Number of people  4.8 Billion 1.2 Billion Income Lower average income Higher average income Economy Government and Community Support Population Growth

Developing and Developed Countries   Developing Developed Number of people  4.8 Billion 1.2 Billion Income Lower average income Higher average income Economy Agricultural Industrial Government and Community Support Population Growth

Developing and Developed Countries   Developing Developed Number of people  4.8 Billion 1.2 Billion Income Lower average income Higher average income Economy Agricultural Industrial Government and Community Support  Weak support Stronger support Population Growth

Developing and Developed Countries   Developing Developed Number of people  4.8 Billion 1.2 Billion Income Lower average income Higher average income Economy Agricultural Industrial Government and Community Support  Weak support Stronger support Population Growth  Rapid Growth Slow Growth

Demographic Transition The slowing of a population growth in a country Usually death rate decreases first Then birth rate decreases

Human Diseases Can slow down the growth of a human population

Human Diseases Examples: AIDS : acquired immunodeficiency syndrome Influenza (flu) :caused by the influenza virus; people can get a vaccination for the flu, however there are many different strains which makes vaccines imperfect Tuberculosis: also known as TB, caused by a bacteria and usually attacks the lungs .

Diseases (that affect non-human populations) Dutch Elm Disease: a disease that is caused by fungi and affects elm trees; it has spread to North America and Europe where elm trees haven’t had a chance to develop resistance . Pfiesteria : harmful microorganisms that have been associated with algal blooms and dying fish.

Dutch Elm Disease

Pfiesteria

Age-Structure Diagrams Shows the age and gender distribution of an area Why are they important? They allow reasearchers to predict what future populations will look like and allows them to make sure a country has the right resources.

Han Rosling-Population TED Talk http://www.youtube.com/watch?v=fTznEIZRkLg