14.5 bio

​V. Ecological Succession (14.5)

​A. Succession occurs following a disturbance in

in an ecosystem

(succession-sequence of biotic changes that

regenerate a damaged community or create

a community in a previously uninhabited area)​

Multiple Choice

What occurs after a disturbance in an ecosystem?

• Succession

• Unusual Weather

• Human activities

• Parasites

​1. Primary succession- development of ecosystem in areas that was previously uninhabited

​A. Pioneer Species- first organism to move into area like lichens and some mosses

​

B. Series of steps: bare rock -> pioneer species ->

small plants -> small animals -> larger animals and plants​

Multiple Choice

Which organism was the first to inhabit an area?

• Pioneer Species

• Second Species

• Habitats

• Ecosystems

​2. Secondary succession- reestablishment of a damaged ecosystem where soil was left intact (after fire, hurricane, etc.)

​

a. Plants and animals that remain start the process of regrowth​

​

Multiple Choice

Which of these forms from a damaged ecosystem?

• Primary Succession

• Secondary Succession

• Dynamic Process

• Ecological Succession

​b. dynamic process- are always changing the face of an ecosystem

Multiple Choice

What process is always changing the face of an ecosystem?

• Secondary succession

• Primary Succession

• Dynamic Process

• Ecological Succession