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-LS2-4

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

Tags

NGSS.MS-ESS2-2

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

Tags

NGSS.MS-LS2-4

NGSS.MS-LS1-5

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-LS2-3

What is a pioneer species?

• Pioneer means first- so it must be the first thing to grow where nothing has grown before.

• Pioneer means last -it's the last thing in an ecosystem

• Pioneer has to do with covered wagons and traveling west during the 1800s.