unit 7. concept 5.

What is ecological succession?

The process of ecological change in an ecosystem where one community is replaced by another community over time

Primary succession

Formation of a new ecosystem

Secondary succession

Recovery of an old ecosystem

Where does primary succession occur

In an area that has not been previously occupied

Pioneer species

The first organisms to grow in a new environment

Primary succession pioneers

Lichens and mosses,

What happens to pioneer species over time

Organisms decompose and release nutrients to form a layer of soil that larger complex plants can grow in

What happens once enough soil has been generated

It can retain nutrients, small plants, flowers, ferns, and shrubs

What is a climax community

A mature and stable community of plants and animals

what is secondary succession

When an area that was previously occupied by a living organism immunity was destroyed by a disturbance and begins to success

secondary succession cont

And establish community is destroyed by soil is still intact. Therefore, it takes less time than primary succession

What are the pioneer species for secondary succession?

Weed and grass

Why does secondary succession tend to occur more quickly than primary

Because you don’t have to make soil from scratch and secondary succession like in primary

Building a brand new ecosystem in scratch no soil

Primary succession definition

Baking cookies from scratch with flour, butter, sugar, etc.

Primary succession analogy

Volcano erupts or glacier melts

Primary succession example

Mosses and lichens because they can make soil

Primary succession pioneer species

Mature and stable climax community

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Primary succession results

Recovering a previously existing ecosystem after disturbance soil intact

Secondary succession, definition

Baking cookies with premade dough

Secondary succession analogy

Forest fire, hurricane farming

Secondary succession sample

Weeds and grasses maybe some awesome lichens but soil is there

Pioneer species secondary succession

Mature and stable, climax, community

Secondary succession results