Population density over time:

http://jbmoore61.blogspot.com/2008_07_01_archive.htm

Because of developments over time, human population has radically increased as time goes on and lifespans lengthen.

 

 

 

 

 

 

 

Carrying capacity of ecosystems:

http://gonzagabio222.wikispaces.com/Chapter+3+-+Ecosystems

Historically, whenever any population goes over carrying capacity, that population will follow its increase with a dramatic decrease. Like a cycle, the carrying capacity of ecosystems determines its population and circulates its stages over time.

 

 

 

 

 

 

Overshoot:

http://www.paulchefurka.ca/Population.html

If population density rises so suddenly that it overshoots the carrying capacity of the resources on which it depends, an overshoot can occur and carrying capacity can be degraded to a lower level.

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