A series of changes that occur in a community (or ecosystem) over time.
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5
What is detritus. If there is enough of it, what can be made?
Detritus is the remains of dead organisms such as lichens, plants, and animals. If there is enough detritus, soil can be made.
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5
After a glacier that has been on the land for 10,000 years retreats, which type of ecological succession will most likely occur?
Primary Succession
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Why do ecosystems (or communities) change over time?
Because of disturbances. These could include fires, volcanoes, floods, landslides, mining, deforestation, meteors, ect.
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Will secondary succession take place in an area where all the life was completely destroyed?
No. Total destruction means primary succession will take place.
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banana
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magnet
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fairy
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lifesaver
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5
Can you define primary succession?
Succession that typically begins in an area with no remnants of a previous community. Example; A volcanic eruption that destroyed absolutely everything.
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5
What is this species?
This is Lichen. It is an example of a pioneer species.
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Describe this phenomena. What will happen next in terms of the ecology?
This is an underwater volcano breaking the surface of the ocean. After the lava has cooled a new island will form and primary succession will begin.
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5
After mosses break down soil even further and create more soil, what can grow there?
Grasses.
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Notice the barren landscape. How can lichens and plants get here?
Their seeds and spores are carried in by the wind.
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What are the two types of ecological succession?
Primary Succession and Secondary Succession
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What is a pioneer species?
The first species to colonize a barren area going through primary succession.
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Why are lichens such important species in primary succession?
