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Unit 1 Chapter 2: Biologic Evolution in the Marianas

Unit 1 Chapter 2: Biologic Evolution in the Marianas. Biologic Evolution: Key Terms. Indigenous, endemic or introduced Endangered and extinct Island & Endemism Types of reefs 8 ways of arrival. Indigenous species.

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Unit 1 Chapter 2: Biologic Evolution in the Marianas

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  1. Unit 1 Chapter 2: Biologic Evolution in the Marianas

  2. Biologic Evolution: Key Terms • Indigenous, endemic or introduced • Endangered and extinct • Island & Endemism • Types of reefs • 8 ways of arrival

  3. Indigenous species • Flora and fauna that occur naturally at a specific place but can also be found some place else in the world

  4. endemic species • Flora and fauna that occur naturally at a specific place and nowhere else in the world

  5. introduced species • Flora and fauna that were brought to an area with the help of human activity

  6. endangered species • Flora and fauna that are threatened close to an extinction

  7. endangered species • Flora and fauna that no longer exists

  8. Island and endemism • Reproductive isolation • No breeding leaving character traits not normally expressed develop and become prominent as species adapt to environment • Small gene pool • Causes interbreeding with traits not normally expressed develop opening the window to a new species • Lack of predation • Adaptation that might not last in the presence of a variety of predations (loss of flight of the Marianas mallard)

  9. Types of reef • Fringing • Grows along the fringes of an island • Barrier • Grows up and out and is separated by a lagoon

  10. Eight ways of arrival • Swimming • Floating • Hitchhiking • Gut transport • Blown by wind • Flying • Rafting • Human-aided

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