Ecosystem Changes (natural and unnatural)

Question 1

Define primary succession

Answer 1

When an ecosystem is developed over hundreds and hundreds of years from bare rock gradually growing

Question 2

Define secondary succession

Answer 2

when an ecosystems starts with soil (something was there before, but due to a natural or unnatural event, that previous ecosystem was destroyed)

Question 3

What are the three main areas of PRIMARY succession (in order)?

Answer 3

Pioneer species, intermediate species and climax community

Question 4

What are the three main areas of SECONDARY succession (in order)?

Answer 4

(same as the primary succession) pioneer species, intermediate species and climax community

Question 5

Give THREE examples of primary succession (doesn’t have to be specific)

Answer 5

volcano eruption, glacier outbursts, nuclear explosions (or was just bare in the first place)

Question 6

Give THREE examples of secondary succession (doesn’t have to be specific)

Answer 6

After a fire, harvesting (too much), deforesting, abandonment of land, renewal after disease or outbreak

Question 7

What is soil development?

Answer 7

When plants break down over time and gradually add more soil to the ecosystem (use in both primary and secondary succession)

Question 8

Why do shade intolerant trees grow first before the climax species (bigger trees)?

Answer 8

Because the smaller plants have more access to sunlight when they don’t have the larger trees blocking it out, giving the community a chance to thrive

Question 9

Give the five examples of unnatural change (human impact)

Answer 9

overharvesting of plants and animals, artificially produces species, destruction of habitat, isolation and fragmentation and pollucion