Edexcel IAL Biology 5.15 Succession and climax community

Identify the time-ordered species change, explain how pioneers alter soil or resources and connect improved conditions and competition to later community replacement.

Exam points

Define succession as changes in species composition within a habitat over time.
Explain how pioneer species alter bare substrate and enable later colonisation.
Interpret ordered changes in plants, microbes or animals from graphs and tables.

[Maximum number: 6]

Stages of succession can be seen on different parts of a sand dune system.
The greater the distance of the sand dune from the sea, the later the stage of succession.
The diagram shows a sand dune system and the table gives some information about the different types of sand dune in this system.

Figure for Question 5.15—Succession and climax community question 1 — Edexcel A-Level Biology A2

Table for Question 5.15—Succession and climax community question 1 — Edexcel A-Level Biology A2

*(iii) Explain the changes in these sand dunes with distance from the sea.
Use the information in the table to support your answer.

All question bank results loaded

5.15—Succession and climax community question 1