p2: succession

Question 1

succession

Answer 1

• series of changes within a community
• from baron rock to a climax community

Question 2

pioneer species

Answer 2

• organisms that first colonise an area

Question 3

sere

Answer 3

• complete succession from pioneer community to climax community

Question 4

climax community

Answer 4

• stable, changes very little

Question 5

describe the process of succession

Answer 5

• colonisation by pioneer species
• pioneers cause changes in environmental (a/biotic) factors
• pioneers make the enviornment less hostile for new species
• new species make conditions less suitable for previous species
• increase in biodiversity
• stability increases
• climax community represented by ___ species

FOR CHANGES: formation of soil, humus, organic matter, nutritents

Question 6

secondary successions

Answer 6

• after forest fire or clearance of agricultural land
• influx of animals and plants dispersed sand migrated

Question 7

explain how succession results in a variety of fish living on coral reefs

Answer 7

• increase in diversity of species
• increase in biodiversity
• provides different niches
• becomes less hostile