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For more information, please see full course syllabus of AP Environmental Science
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Wildlife & Endangered Species

  • When it comes to wildlife and endangered species, we must consider: maximum sustainable yield, the minimum viable population, and the optimum sustainable population
  • Carrying capacity and logistic growth curves relate the maximum sustainable population in an area to the resources of that given habitat
  • In managing wildlife the IUCN has a 4 principle approach: safety factor in terms of population size, concern with the community/resources, maintenance of the ecosystem/minimizing adversity, and continual monitoring and assessment
  • Age structure and harvests impact our knowledge about species in the wild. The catch per unit figures are also informative in determining total population numbers
  • Fisheries are dominant in a few countries: Japan, China, Russia, Chile, and the United States. Fish harvest data recently has been alarming, leading to the question: Are fisheries sustainable in the long run?
  • Endangered species and threatened species have value to the human population in many ways. Their existence in the future truly depends on how we treat them and their resources
  • Extinction can be local or global, and thankfully some endangered species have been helped back into larger population numbers
  • On the other hand, some species are overly abundant and can encroach on the human population

Wildlife & Endangered Species

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

  • Intro 0:00
  • Sustainable Yields and Viable Populations 0:06
    • Maximum Sustainable Yield
    • Minimum Viable Population
    • Optimum Sustainable Population
    • Examples
  • Carrying Capacity 6:47
    • Logistic Carrying Capacity is Reached
    • Number of Births in Unit Time is Equal to Number of Deaths
  • Managing Wildlife 8:25
    • IUCN 4 Principle Approach
    • Time Series
  • Age Structure and Harvests 13:50
    • Age Structure
    • Harvests as an Estimate of Numbers
  • Fisheries 16:41
    • Fish Provide 16% of World's Protein
    • Fish Harvests Increased Greatly in Mid-20th Century
  • Can Fisheries Be Sustainable? 20:08
    • World's Fish Catch Went from 39 to 68 Million MT
    • Fish Harvests Declining
  • Endangered Species 22:51
    • Why/ How Do We Want to Save These Species?
    • IUCN's Red List of Endangered Species
  • Extinction: Kinds and Causes 28:19
    • Local vs. Global Extinction
    • Causes of Extinction
    • Recovered Species
  • Overabundance and Human Fault 34:46
    • Too Many Individuals for a Species
    • Humans Affect Chances of Extinction