11.1

Question 1

Ecological succession is the:

Answer 1

gradual process by which ecosystems change and develop over time

Question 2

2 types of succession:

Answer 2

primary

secondary

Question 3

primary succession is the series of community changes that occur:

Answer 3

in an entirely new habitat that has never been colonised before, e.g. a newly quarried rock face

Question 4

secondary succession is the series of community changes that takes place:

Answer 4

in a habitat that has been previously colonised but has been disturbed, e.g. an area of trees cleared by fire or felling

Question 5

During succession, an area is initially colonised by certain organisms:

Answer 5

that are replaced over time by other organisms

Question 6

Succession is an:

Answer 6

orderly sequence of events

Question 7

At each stage of succession, certain species can be recognised that change the environment so that it becomes…

Answer 7

more suitable for other species

Question 8

The biomass that accumulates throughout the process of succession can…

Answer 8

increase the number of niches available for plants and animals and can increase the depth and nutrient content of the soil

Question 9

Succession continues until a relatively stable community develops that is in…

Answer 9

equilibrium with the existing environment - climax community

Question 10

The communities change with time because of the interaction between

Answer 10

species and their environment

Question 11

During succession…

Answer 11

one community is generally replaced by another