Shelford's law of tolerance states that the abundance of an organism can be controlled by factors. A detailed look at this law can be found at: http://www.biog1105-1106.org/demos/106/unit08/media/3a.lawofminimum.pdf. This law is most used by Ecologist that analyzes environmental conditions. For example if you have a population of black bears in one area, one would look at what environmental
. factors such as cold, affects the bears population. For more information about Shelford's law, the following link: http://www.encyclopedia.com/doc/1O8-Shelfordslawoftolerance.html.
