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Chapter 6 – Changes in Ecosystems

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This chapter delves into the dynamic nature of ecosystems, exploring factors that cause environmental changes and how species adapt to them. It highlights the role of organisms, human activities, and pollution on ecosystems. Key discussions include the effects of invasive species like zebra mussels on native flora and fauna, the consequences of acid rain, and the significance of recycling. Furthermore, it examines hereditary traits versus acquired characteristics in species, adaptations that enhance survival, and the cascading effects of changes within ecosystems.

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Chapter 6 – Changes in Ecosystems

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  1. Chapter 6 – Changes in Ecosystems Lesson #1 – How do Ecosystems Change? Lesson #2 – How do Species Change? Lesson #3 – How do Changes Cause More Changes?

  2. Lesson #1 - Questions • What can cause changes in environments? • What affect did zebra muscles and garlic mustard plants have on native species? • What type of rain is harmful to the environment? • What environmental affect would recycling help?

  3. Animals Change Ecosystems • Organisms can cause changes in ecosystems. • Some changes can help or harm the environment. • Beaver dams change the environment.

  4. New Species in Environment/People Changing Environment • People make physical changes to ecosystems. • People change ecosystems both accidentally and on purpose.

  5. Garbage and Pollution • Garbage is placed in landfills and pollutes the ground. • Pollution causes acid rain that can hurt plants and animals.

  6. Ecosystems can be changed by humans as well as forces of nature. • True • False

  7. When people introduce new animals or plants into an ecosystem it changes. • True • False

  8. The garbage in landfills decays quickly. • True • False

  9. Acid rain is caused by water pollution. • True • False

  10. Lesson #2 - Questions • Describe heredity. • Is the color of a flamingo’s feathers an inherited trait, or acquired? • Name two different adaptations. • Why would there be more competition among organisms if an ecosystem changes?

  11. Inheriting DNA • Hereditary is the process by which offspring receive half of their genes from each parent. • Because offspring inherit traits from both parents, they differ from both parents.

  12. Traits That Are Not Inherited • Not all traits are a result of DNA • Flamingos are born white and turn pink with eating shrimp and other foods • Soil also affects plant appearance

  13. Adaptations • An adaptation is a trait that allows an organism to better fit into an ecosystem. • Structural adaptations are changes in body parts that help animals survive.

  14. Behavioral Adaptations • Are inherited adaptations that help animals survive. • They affect how animals behave around other animals.

  15. Every animal inherits the same amount of genes from each parent. • True • False

  16. The environment does not affect a species appearance. • True • False

  17. A hummingbirds long beak is a structural adaptation. • True • False

  18. Adaptations to an environment can help a species live longer. • True • False

  19. Lesson #3 - Questions • What adaptation allows hawks to live in cities? • Name a reason that humans might want to limit antibiotics and pesticides? • What happens to a species when it becomes extinct? • What might you look for to see if a species used to live on Earth?

  20. How do changes cause more changes? • Some organisms change their behavior in response to a change, such as the kinds or numbers of other organisms in their ecosystems. • Pesticides are poisons that kill insects.

  21. How do changes cause more changes? • When changes occur in an ecosystem, some organisms migrate to a place where conditions are more favorable. • Species that can’t move or adapt to the changes may become extinct.

  22. Organisms adapt to harmful changes in their ecosystems. • True • False

  23. Once organisms lose their habitats, they can never find new homes. • True • False

  24. An extinct species has limited numbers of its kind. • True • False

  25. Poisons in ecosystems can travel through the food chain. • True • False

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