Community Change Over Time (Grade 11 NSC Matric Life Sciences): Flashcards
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Succession
Succession
Gradual ecosystem changes from simple to complex, stable community
Primary succession
Primary succession
Colonisation of new area with no soil, gradual species changes
Secondary succession
Secondary succession
Regrowth after existing habitat is disturbed or damaged
Pioneer species
Pioneer species
First organisms in new areas; break down rock, create soil
Climax community
Climax community
Final, stable community after succession completes
Primary succession location requirement
Primary succession location requirement
Areas with no soil (e.g., volcanic islands, glacier retreat)
Primary succession duration
Primary succession duration
Hundreds or thousands of years
Pioneer species in primary succession
Pioneer species in primary succession
Lichens
How lichens break down rock
How lichens break down rock
Weathering and release of acid-like substances
Primary vs secondary succession key difference
Primary vs secondary succession key difference
Soil absent in primary; soil present in secondary