Figure 0. The modeling process. Locust Swarm Info is Here 

Install the Stand-Alone version here Vista Users should download this.

VISTA USERS READ THIS TO RUN THE PROGRAMS
 

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The above graph shows the global population growth of humans since prehistory. Note that until recently the growth of the human population was very slow. However, since the Industrial Age human population growth has accelerated exponentially. Unlike most natural populations, this type of growth is not normally seen.  Main reason why human population continues to rise is here.

World Population in Billions with Comparative Demographics of Kenya and the US

A closer look at the recent exponential growth of human populations...

• It took all of human history until 1780 for earth's population to reach 1 billion people.

• In only 150 years the population had doubled to 2 billion

• By 1974 the world population doubled again in less than 45.

• In 1988 we added another two billion.

• On February 26^th 2006 (at 7:16 PM EST) there were 6.5 billion people on the planet.

• The population is expected to reach 7 billion on Oct 18^th 2012. More info here.

• World Population Clock This model predicts we'll reach 7 billion some time on April 9^th 20010

• Lecture and Review Population growth terminology YOU MUST KNOW THESE DEFINITIONS!!!
• Lecture and Review on Human Population Growth
• Lecture and Review Demographic Transition
• Human Population Growth Main Topics
• World Scientists' Warning to Humanity from Union of Concerned Scientists
• Movies
  • World Population Passes 6.6 Billion (6 min)
  • Zero Population Growth (6 min)
  • Jane Goodall and Population Growth (4 min)
  • Easter Island Environmental Disaster Movie (5 min)
• VHEMT
• Main reason why human population continues to rise is here.

   

Install the Stand-Alone version here

VISTA USERS READ THIS TO RUN THE PROGRAMS

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Figure 6 (Click for Example of Population Model)

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Some species depend more on reproductive quantity while others depend on reproductive quality. Those that rely on quantity are said to be r-selected, while those that depend on quality are K-selected

Table 1 Click this too

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Figure 14 (Click picture to start movie).

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Figure 17 (Click picture to start movie).

Figure 18. Growth of Paramecium under laboratory conditions.

Figure 19. Offspring per female Daphnia under different population densities.

Figure 20. Effect of populations density on tit mice.

Table 2. Effect of population density on house mice fecundity