Mt St Helens Succession

The process of secondary succession can begin

• after an ecosystem disturbance
• before the soil has been established
• once new land has been created
• when plants begin reproducing

In 1980 the Mt. St. Helens volcano violently erupted and impacted thousands of square miles of forest. Some areas are still undergoing primary succession where

• thick sediment choked streams
• violent explosions removed soil
• light ash covered the ground
• high winds blew down trees

Tags

NGSS.MS-ESS2-2

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

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

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

What is the first species you will see after a primary succession? (in picture)

• lichens
• mosses
• small plants
• insects

Tags

NGSS.MS-LS2-3

What is the first species you will see after a secondary succession?

• lichens
• small plants
• insects
• birds

What is the name given to lichen or algae after a primary succession?

• pioneer species
• volunteer species
• founder species
• conqueror species

Which of the following would cause a secondary succession?

• volcanic eruption
• newly exposed bare rock
• retreating glacier
• forest fire

Tags

NGSS.MS-LS2-4

Which of the following would cause a primary succession?

• fire 
• flood 
• tornado
• volcanic island

Tags

NGSS.MS-ESS2-2

Succession that occurs after a fire in an ecosystem is called __________________________.

• primary successin
• flame succession
• secondary succession
• climax succession