5.1.5 - Stages Of Succession

Question 1

What Is Succession?

Answer 1

Process, of an ecosystem changing over time.

Question 2

What Changes During Succession?

Answer 2

The biotic and abiotic conditions.

Question 3

What Is Primary Succession?
(2 Points)

Answer 3

~ Occurs when, newly formed or exposed land, is formed.

~ There is no soil, just bare rock.

Question 4

What Is Meant By ‘Colonisation’?

Answer 4

Arrival of new organisms, on bare land.

Question 5

What Is Secondary Succession?
(2 Points)

Answer 5

~ Takes place, on previously occupied land.

~ Soil is already present.

Question 6

Describe How Primary Succession, Occurs In A Series Of Stages
(7 Points)

Answer 6

~ Starts via colonisation, by pioneer species.

~ Seeds are blown by the wind, and begin to grow.

~ Pioneer species die and decompose, the dead organic matter forms soil.

~ Seeds, land on this soil and begin to grow, with the roots holding the soil in place.

~ These plants die and decompose, the soil becomes deeper and more nutrient rich.

~ Trees and shrubs can now grow.

~ This ecosystem becomes complex and stable, and is known as the climax community.

Question 7

What Is Meant By ‘Pioneer Species’?

Answer 7

First species to colonise, bare land.

Question 8

Describe How Humans Can Prevent Succession
(3 Points)

Answer 8

~ Stops climax community from developing.

~ E.g. Regular mowing.

~ Species developed as a result of human activities, are known as plagioclimax species.