Competition (AQA A-Level Biology): Flashcards
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Competition definition
Competition definition
Two or more individuals sharing resources insufficient to meet their needs
Intraspecific competition
Intraspecific competition
Individuals of same species compete for limited resources
Interspecific competition
Interspecific competition
Individuals of different species compete for same resources
Competitive exclusion principle
Competitive exclusion principle
Two species cannot occupy same niche indefinitely when competing
Niche differentiation benefit
Niche differentiation benefit
Allows similar species to coexist by reducing direct competition
How competition affects population
How competition affects population
Through changes in birth and death rates
Resources organisms compete for
Resources organisms compete for
Food, light, space, oxygen, water, breeding sites
Grey squirrel population in Britain
Grey squirrel population in Britain
Approximately 2.5 million
Red squirrel population in Britain
Red squirrel population in Britain
Only 160,000
Paramecium competition result
Paramecium competition result
P. aurelia increased, P. caudatum declined to near zero