Ecological 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
• secondary succession
• initial 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

Succession that occurs in an area with no soil...

• primary succession 
• ecological succession 
• secondary succession
• pioneer speciles

Succession that occurs in an area where soil is already present...

• primary succession 
• secondary succession 
• secondary succession
• pioneer speciles

Starts with bare rock followed by lichen...

• primary succession 
• secondary succession
• both types of succession

This type of succession occurs after a forest fire...

• primary succession
• secondary succession
• both