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Population Ecology

Population Ecology. Week 34. Thursday 5.9.2013 Take out: Sheet of Notebook Paper for Cornell Notes; Write down the Objective and topic after your BR! . Bell Ringer:. Objective:. I WBAT: Compare and Contrast density-independent factors and density-dependent factors in a Venn Diagram.

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Population Ecology

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  1. Population Ecology Week 34

  2. Thursday 5.9.2013 Take out: Sheet of Notebook Paper for Cornell Notes; Write down the Objective and topic after your BR! Bell Ringer: Objective: IWBAT: Compare and Contrast density-independent factors and density-dependent factors in a Venn Diagram. Topic: Population ecology • Define population. Give one example and explain why this is a population. (Why is this not a community?)

  3. Population Characteristics Population Density The number of organisms per unit area. ex. Downtown Chicago has a very high population density.

  4. Population Characteristics 3 Types: 1. Uniform ex. All individuals within the population are spaced out evenly in the habitat 2. Clumped ex. Individuals live in packs or herds (4-5 wolves live together); school of fish 3. Random ex. Individuals live randomly throughout appropriate habitats 2. Dispersion

  5. Dispersion

  6. Think, Pair, Share Species of small fish often clump together and form schools of fish, but large fish usually do not form schools. What advantage do smaller fish gain by forming clumped groups or schools?

  7. Population Limiting Factors Density- Independent Factors • Any factor in the environment that does not • depend on the number of members in a • population. • Usually abiotic • Weather Events (hurricanes, tornadoes)

  8. Population Limiting Factors Any factor in the environment that depends on the number of members in a population -Often Biotic -Predation -Disease -Parasites -Competition Density-Dependent Factor

  9. Venn Diagram- Group Practice (4min) • Draw a Venn Diagram that compares and contrasts density-independent factors and density-dependent factors.

  10. Population Growth The number of individuals who move AWAY from the population ex. If you & your family move to china! The number of individuals who move into a Population ex. Ms. Chaka immagrated to the USA from Ethiopia Emigration: Immigration:

  11. Population Growth: Draw Graph on either side! Exponential Growth Model Shows how a population would grow if there were no limits placed on it by the environment. NOT common -Graph forms the shape of a “J”

  12. Population Growth: Draw Graph on either side! Logistic Growth Model Occurs when the population’s growth slows or stops, following exponential growth, and stops at the carrying capacity -Forms an “S” shape

  13. Population Growth Carrying Capacity The maximum number of individuals in a species that an environment can support long term. Limited by: -water -food -physical space -nutrients/ food What do you think is the carrying Capacity of YOUR house?

  14. Check For Understanding • Unrestricted populations of organisms experience _____. 1.linear growth 2. biotic growth 3. exponential growth

  15. Friday 5.10.2013 Take out: Notes from yesterday Bell Ringer: Objective: IWBAT: Identify how the birth rate and death rate effect the rate at which a population changes. Topic: Human Population • Predict the size of Earth’s (human) population in 100 years. (Why do you think this?) 2 sentences for credit

  16. Human Population Growth • Demography • Current population • The study of human population size, density, distribution, movement, and birth/death rates. • Today ~7.2 Billion • By 2050 it is estimated that 9BIOLLION humans will be living

  17. THINK-PAIR- SHARE! (3min) Write down 2 reasons answering the question….. You may talk to your table group What are two ways YOU THINK humans have increased the carrying capacity 1. ….. 2. …..

  18. Technological Advances • What are some advances in technology that have helped us increase the carrying capacity? • Agriculture and domestication of animals has increased food supply • Technological advances in medicine has reduced the number of deaths • Improvements in shelter have made humans less vulnerable to climate and natural disasters.

  19. Human population growth rate Exponential; J-shaped What type of growth pattern do we see from 1000 AD to 2025? (exponential or logistical) Infer… • What year does the population “dip”? • How does “modern” population compare to early population?

  20. Shift Happens Video • Write down TWO interesting facts from the video while you are watching it. http://www.youtube.com/watch?v=YmwwrGV_aiE

  21. Human Population Growth Rate • How fast is the human population growing now? • What caused the big dip in 1960 • Even though we are still growing, we are not growing as fast as we used to. Famine/ starving in china!!!!!

  22. Trends in Population Growth • Current population trends show that industrial countries have a decreased birth rate. • These same industrial countries also have a decreased death rate. • Non-industrialized countries (Africa) show an increase in birth rate.

  23. China and Carrying Capacity • In fear of their population reaching carrying capacity, China limits the amount of children you are allowed to have. • Is this ethical? • Should we implement that here?

  24. Week 35 Tuesday 5.14.2013 Pick-up: Guided Notes from Front Bell Ringer: Objective: SWBAT: Explain why biodiversity is important. Explain the various threats to the loss of biodiversity. • Compare and contrast emigration and immigration.

  25. 1. Vocabulary a. Biodiversity- is the variety of life in an area that is determined by the number of different species in that area.

  26. 2. Types of Biodiversity High Biodiversity Low Biodiversity An ecosystem that has very little variety of plants and animals. The Tundra • An ecosystem that has a large variety of plants and animals. • The ocean

  27. 3. We Practice! • Rainforest • Desert • Wetlands

  28. You Practice • Take four minutes to work on Practice #6- Biodiversity • Whatever you do not finish is for homework

  29. The Loss of Biodiversity • Take three minutes to read and do Cornell Notes on the first section on the back of your notes from today. • Stop at Biodiversity at Risk. • Be prepared to share out loud!

  30. Biodiversity at Risk • Take three minutes to read and take Cornell Notes on Biodiversity at Risk. • Stop at Does Biodiversity really matter? • Be prepared to share out loud

  31. Does Biodiversity Really Matter? • Take three minutes to read and take Cornell Notes on Does Biodiversity Really Matter? • Stop at The Value of Biodiversity. • Be prepared to share out loud

  32. The Value of Biodiversity • Take three minutes to read and take Cornell Notes on The Value of Biodiversity. • Stop at Unanswered Question. • Be prepared to share out loud.

  33. Reflection • How can we slow down the current extinction rate?

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