Populationx2x - Population Population Characteristics over...

Info iconThis preview shows pages 1–11. Sign up to view the full content.

View Full Document Right Arrow Icon
Population
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Population Characteristics over Time For most of human history, population was fairly stable with growth rate of 0.002% per year. Advances in developed world changed that: 17th century advances in science, agriculture, and health practices 19th century Industrial Revolution Population quadrupled between 1750-1950 in developed world because of declining death rates Population doubled between 1950 – 1990: from 2.5 to 5 billion Transition period – lag time till birth rates decrease to balance out lower death rates.
Background image of page 2
Human Population Growth Over Time
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 4
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Measures of population Numbers of births, deaths, immigration, emigration over a specified time period determines the changes in pop. size Changes are expressed numerically: DT: doubling time in years TFR: total fertility rate Rate of Natural Increase-expressed as %
Background image of page 6
Growth and Total Fertility Rates Growth is slowing down globally Global TFR: 1950’s – 5.0 1990’s – 2.7 Between 1970-1995: Asia TFR: 5.7 2.6 Africa TFR: 6.6 5.1 Latin America/Caribbean TFR: 5.0 2.7
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
However, globally rate of increase is still at 90 million people each year. At what number will our population finally stabilize??
Background image of page 8
Demographic Factors Influencing Demand for Food Age Structure : reflection of the underlying demographic conditions of the preceding decades and at the same time is an important determinant of future demographic patterns.
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Population Pyramids A convenient way to visualize the age structure and the sex of the population
Background image of page 10
Image of page 11
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/08/2010 for the course NUFS 139 at San Jose State.

Page1 / 31

Populationx2x - Population Population Characteristics over...

This preview shows document pages 1 - 11. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online