Download How Ecosystems Change

Changing Ecosystems
Human Impact on Tundra
Human Impact on Temperate
Deciduous Forest
Human Impact on Temperate Rain
Forest
Human Impact on Tropical Rain
Forest
Human Impact on Desert
Human Impact on Grassland
Human Impact on Rivers and
Streams
Human Impact on Lakes and
Ponds
Human Impact on Wetlands
Human Impact on Coral Reefs
Some changes to an ecosystem
are natural, some are man-made
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