how ecosystems change naturally. what changes will you see?
TRANSCRIPT
How Ecosystems Change Naturally
What changes will you see?
Succession
• The normal, gradual changes that occur in the types of species that live in an area.
Primary Succession
• How will these areas (volcanic rock and glacial rock deposit) change?
• What will plants need to survive here?
Primary Succession
• Succession that begins in a place that previously had no soil or plants.
Pioneer Species
• First plants to inhabit an area.
• They often begin the soil building process by breaking down the rocks along with weathering and erosion.
Lichen• A common pioneer species, it produces
acid that helps weather the rock into soil.
• When it dies, it will also help fertilize the newly forming soil.
As soil forms, seeds are blown in or dropped by birds or other animals
Secondary Succession
• Succession that occurs where soil is already present.
Secondary succession occurs much faster than primary succession-Why?
Climax Community• A community of plants that is relatively
stable and undisturbed and has reached an end stage of succession. (ex-a forest)
Review
What type of succession will occur here?
• Surtsey, an island off the coast of Iceland. It was created in 1963 by a volcanic eruption.
Primary Succession
What will the first species to move in be called?
• Pioneer Species
What is a common pioneer species?
• Lichen (Like-ehn)
What type of succession will occur here?
• Secondary succession
What is the final stage of succession called?
• Climax Community