26 The diagram below represents a process that occurs in nature.
1800
Mosses
Bedrock
1900
2000 Forest
Grassos Shrubs
Soll
Bedrock
SO
Bedrock
This diagram can be used to illustrate the
(1) effects of reduced competition between different types of plant life
(2) effect of human intervention on a stable ecosystem
(3) ecological succession from bare rock to stable ecosystem
(4) evolution of mosses to trees over 200 years
