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Ecology 2000 Notes

by: Savannah Peat

Ecology 2000 Notes ECOL1000

Marketplace > University of Georgia > Business > ECOL1000 > Ecology 2000 Notes
Savannah Peat

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About this Document

These notes are from class dates 2/16 and 2/18 in McArthur's class.
Environmental Issues
Dr. J Vaun McArthur
Class Notes
Ecology, Environment, Science
25 ?




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This 4 page Class Notes was uploaded by Savannah Peat on Thursday February 18, 2016. The Class Notes belongs to ECOL1000 at University of Georgia taught by Dr. J Vaun McArthur in Spring 2016. Since its upload, it has received 12 views. For similar materials see Environmental Issues in Business at University of Georgia.


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Date Created: 02/18/16
2/16/16 Exponential Growth is Unsustainable    Von Foerster Human Population Model o Best model to describe human growth o Factors in declining death o Based on experimental equation o Did not factor in  ZPG Movement  Ex: China’s one child movement o Predicted population size is 10% within real number What’s the problem with population growth?  7.4 billion humans  rapid population growth, which increases impact on environment  rate of consumption is growing rapidly History of growth  Pre­agricultural period: o 100,000 years ago o had culture and migrations o took 10,000 years to double population, resulting in 5­10 million total world pop.  Agricultural period: o 10,000 years ago o had plant and animal domestication o took 1,000 years to double population, resulting in 500+ million total world pop.  Industrial period: o Sanitation, medicine, fossil fuels  Current period: o 7 billion Global Variation in Population growth  cultures follow demographic transition, stages in population changes o Latin America is a prime example of demographic transition   Influenced by birth rates  o Birth rates are influenced wealth (more wealth, lower birth rates), age (age  specific birth rates; ages in moms)  Influenced by death rates o Death rates are influenced by wealth (wealth leads to increased nutrition and  health care) and increased infant mortality rate      Survivorship­ number of years members of a specific group lives, affected by  wealth and sex      Life expectancy­ number of years expected to live; affected by wealth and sex,  girls live longer  Influenced by age structure o Determined by survivorship and birth rates o Shown through pyramids Population Concepts  1 .     Population momentum concept 1 o “r” is strongly influenced by people in pre­reproductive age class o population with most people in pre­reproductive age class will still continue to go 2. Population momentum concept 2 o “r” is strongly influenced by people in first reproductive class o population with most people in first reproductive class will grow faster Population Scenarios  r=increase of 1.13% per year  optimistic rate: 9 billion by 2050 Resource Use and Population Sustainability     sustainability vs. carrying capacity      reach carrying capacity= no growth 3 E’s of Environmental Issues 1. Ecology 2. Economics 3. Ethics Manage Population  Family planning (manage birth rate)  Some countries growing too fast (China, India)      China has the 1 Child Policy, children are often abandoned, especially girls o Women often go missing here, leading to feminist movement Others too slow (Italy, Spain) Population control raises ethical and human issues China has relaxed 1 child policy 2/18/16 Some attributes of “R” and “K” selected species Environmental conditions: R: unstable, K: stable  Population si  R: below K, K: constant, near K  Selection Favor  R: high “R”, early reproduction, K: low “R”, delayed reproduction Length of life R: Short K: Long We should be where K is, but we’re not “r” species will have their “k” set back by four factors o Disease o Famine o War o Pestilence GA is 16  fastest growing state In GA and south, there is severe forest loss due to suburbia  Components of Change  Immigration, birth rate; Ex: Darien Project Georgia Atlas  Population is affected by: o Education (adults without high school degree) o Social indicators (Medicaid, food stamps, financial aid) Several Population and Demographic factors suggests there are two GA’s  Much of this is because of pregnancy, immigration  Education opportunities are causative factors of birth rates  This “2 GA’s” can be explained through “r” and “k”  Population control is also linked to women’s rights (lack of growth occurs where there  are more women, meaning they don’t reach ZPG) Disease Classification:  Hard to transmit Easy to transmit Fast to kill Ebola and Meningitis Cholera Slow to kill AIDS Zika  Ebola has shown to include the natural world o Explores connection between unrelated pieces of info like MEAT Ex: Busmeat  video  Pieces of puzzle o 1. Cutting rainforest new contact with wildlife o 2. Wildlife diseases  infected animals poaching Eventual transfer to  World Health Organizationhumans  Diseases come from tropics  Disease cannot be quarantined  Created a 4 step plan o 1. Invest in public awareness o 2. Invest in public infrastructure o 3. Medical research o 4. Protect tropical habitats


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