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Grab the Niche / Habitat Worksheet and Complete it as a Warm Up

Grab the Niche / Habitat Worksheet and Complete it as a Warm Up. Changes in Ecosystems: Ecological Succession.

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Grab the Niche / Habitat Worksheet and Complete it as a Warm Up

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  1. Grab the Niche / Habitat Worksheet andComplete it as a Warm Up

  2. Changes in Ecosystems:Ecological Succession

  3. Describe the changes you see occurring after the volcanic eruption.[Succession Video]Be specific. Notice what occurs first, did the land change? How small or big were the first plants?How Fast did this occur?

  4. What is Ecological Succession? • Natural, gradual changes in the types of species that live in an area

  5. Two Types of Ecological Succession • Can be primary or secondary

  6. What Differences do you see?

  7. Primary Succession • Begins in a place without any soil and No life • Examples • Sides of volcanoes • Landslides • Flooding

  8. Pioneer Species • First, lichens (that do not need soil to survive) grow on rocks • Next, mosses grow to hold newly made soil • Known as PIONEER SPECIES

  9. Pioneer Species Low, growing moss plants trap moisture and prevent soil erosion Lichens break down rock to form soil.

  10. Primary Succession • Soil starts to form as lichens and the forces of weather and erosion help break down rocks into smaller pieces • When lichens die, they decompose, adding small amounts of organic matter to the rock to make soil

  11. Primary Succession • Simple plants like mosses and ferns can grow in the new soil

  12. Primary Succession • The simple plants die, adding more organic material (nutrients to the soil) • The soil layer thickens, and grasses, wildflowers, and other plants begin to take over

  13. Primary Succession • These plants die, and they add more nutrients to the soil • Shrubs and trees can survive now

  14. Primary Succession • Insects, small birds, and mammals have begun to move into the area • What was once bare rock, now supports a variety of life

  15. Secondary Succession • Begins after an event in a place that already has soil and • was once the home of living organisms • Occurs faster and has different pioneer species than primary succession • Example: after forest fires

  16. Decide which of the following picture are Primary or Secondary Succession

  17. Secondary Why?

  18. Primary Why?

  19. Secondary Why?

  20. Secondary Why?

  21. Primary Why?

  22. Primary Why?

  23. Climax Community • A stable group of plants and animals that is the end result of the successionprocess • Does not always mean big trees • Grasses in prairies • Cacti in deserts

  24. Ecological Succession - Natural, gradual changes in the types of species that live in an area

  25. Primary Succession – no previous life Secondary Succession – was previously home to organisms

  26. Compare Succession Chart Below (4 points) Primary Succession Secondary Succession Event causing Removal of existing life Soil Present Seeds, roots, small plants present Has Biomass (some living organisms) • No Soil • No previous Life • (Pioneer species) Lichen and Moss • No biomass (living organisms)

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