Primary and Secondary Succession

What is ecological succession?

• A series of predictable changes that occur in a community over time.

• It is the number of fish increasing.

• It is the seasons of the year.

• It is that rain follows cloud formation.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Primary succession begins where there was no ecosystem and no soil such as

• a severe storm

• a volcanic eruption

• an old farm is abandoned

• a forest fire

What is a pioneer organism? It is the ______ organism in _________ succession. 

• is the first , in primary succession
• is the last in secondary succession, 

Secondary succession (thnk soil) forms after a catastrophic event like a forest fire and has a ___________ growth rate than primary succession because soil already exists.

• extremely slower

• slower

• faster

So, how does an ecosystem start if there is no soil?

• Moss and lichen break down rock and lava and produce soil.

• Moss and lichen are air borne and they move by the wind to start in a secondary succession environment.

• Moss and lichen are simple living organism that can start growing almost anywhere.

• All answers

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-2

succession that occurs in an area where soil is already present

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

starts with bare rock followed by lichen

• primary succession 
• secondary succession
• both types of succession

The picture shows what type of succession?

• primary
• secondary
• tertiary
• quadanary

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

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

• primary
• secondary
• old field
• ecosystem

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS3-2