Ecological succession
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Ecological Succession. Living Environment Ecology. Agenda. Natural Disasters Ecological Succession Guided Notes Ecological Succession Group Practice Exit Ticket Finish Early? Work on Castle Learning. Japan Tsunami. California Fires. Question of the Day.

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Ecological succession

Ecological Succession

Living Environment



  • Natural Disasters

  • Ecological Succession Guided Notes

  • Ecological Succession Group Practice

  • Exit Ticket

  • Finish Early? Work on Castle Learning

Question of the day
Question of the Day

  • Aim: How do ecosystems gradually change over time?

Changes in ecosystems ecological succession

Changes in Ecosystems:Ecological Succession

What is ecological succession
What is Ecological Succession?

  • Natural, gradual changes in the types of species that live in an area

  • Can be primary or secondary

  • The gradual replacement of one plant community by another through natural processes over time

Primary succession
Primary Succession

  • Begins in a place without any soil:

    • Sides of volcanoes

    • Landslides

    • Flooding

  • First, lichens that do not need soil to survive grow on rocks

  • Next, mosses grow to hold newly made soil


  • Pioneer species
    Pioneer Species

    Low, growing moss plants trap moisture and prevent soil erosion

    Lichens break down rock to form soil.

    Primary succession1
    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

    Primary succession2
    Primary Succession

    • Simple plants like mosses and ferns can grow in the new soil

    Primary succession3
    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

    Primary succession4
    Primary Succession

    • These plants die, and they add more nutrients to the soil

    • Shrubs and trees can survive now

    Primary succession5
    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

    Secondary succession
    Secondary Succession

    • Begins 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

    Climax community
    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

    Group practice
    Group Practice

    • Work in 12 inch voices

    Exit ticket
    Exit Ticket

    • You have 3 minutes for the exit ticket