Succession

What is the role of the pioneer species in Primary Succession?

• To kill any remaining organisms from before the disturbance

• To break down rock and rebuild soil

• To provide food for large animals

• To put fresh oxygen into the air

The forest in panel #8 is a...

• pioneer species

• climax community

• tertiary community

• intermediate species

Succession type?

• primary succession

• secondary succession

• tertiary succession

• variable succession

Succession type?

• primary succession

• secondary succession

• tertiary succession

• variable succession

Natural disasters such as flooding and tornadoes are linked to ________________.

• primary
• secondary
• old field
• ecosystem

How do lichens contribute to primary succession?

• Lichens decompose organic matter from animals and plants
• Lichens begin to break down rock to form soil
• Lichens are nitrogen fixing bacteria
• Lichens convert carbohydrates into fossil fuels.

What is formed during primary succession that doesn't need to be formed during secondary succession?

• pioneer species
• soil
• climax community
• lichens

What type of succession is shown going from figure A to figure B?

• primary succession
• eutrophication
• secondary succession
• intermediate

After a forest fire, an ecosystem would start regrowth through -

• primary succession
• secondary succession
• climax community
• limiting factors

Which catastrophic event will most likely have the effect of returning an ecosystem to primary succession?

• A tornado
• A volcanic eruption
• A flood
• A drought