POPULATION DYNAMICS….7billion & Counting Essential Questions What are the factors that affect population growth? What are some of the effects that overpopulation can have on an environment? .wikipedia.org/wiki/Paul_R._Ehrlich#mediaviewer/File:2008_Summer_Olympics_torch_relay, _Shenzen.jpg veston
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Essential Questions What are the factors that affect population growth? What are some of the effects that overpopulation can have on an environment? Essential.
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POPULATION DYNAMICS….7billion & Counting
Essential Questions
What are the factors that affect population growth?
What are some of the effects that overpopulation can have on an environment?
http://en.wikipedia.org/wiki/Paul_R._Ehrlich#mediaviewer/File:2008_Summer_Olympics_torch_relay,_Shenzen.jpgSteve JervestonCC BY 2.0
• Populations grow rapidly with ample resources (biotic potential), but as resources become limited (environmental resistance), population growth rate slows and levels off.
• Carrying Capacity (K) is the maximum number of organisms that an area can support for longer lengths of time.
Logistic GrowthCan you think of some resources that could limit population growth? Characterize these resources as abiotic or biotic.
Exponential and Logistic Population Growth: J-Curves and S-Curves
• As a population levels off, it often fluctuates slightly above and below the carrying capacity.
Overpopulation Video
By the year 2020, 9 to 10 billion humans are expected to inhabit the planet. Do you think the world is overpopulated?
Check out the link below for a great video on the topic!