AA_secondarysuccsession_P5

By speedypiglet
  • Eruption

    Eruption

    On May 18 1980, Mt St Helens erupted.
  • Damage

    Damage

    The eruption left behind dry lava flows and ash in the air stream.
  • Annual Plants

    Annual Plants

    In 1982 annual plants began to sprout.
  • Grasses

    Grasses

    3-4 years after the eruption grasses started to grow.
  • Shrubs and Small Trees

    Shrubs and Small Trees

    5-150 after the eruption shrubs and small trees will grow.
  • Mature Forest

    Mature Forest

    150+ years after the eruption a mature forest will develop.