Factors That Influence Population Size (OCR A-Level Biology A): Flashcards
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Practise the cards
10 cards from this deck
Type of growth where population doubles at regular intervals
Type of growth where population doubles at regular intervals
Exponential growth
Shape of curve produced by logistic growth
Shape of curve produced by logistic growth
S-shaped curve
What organisms do during lag phase of logistic growth
What organisms do during lag phase of logistic growth
Adapt to new environment and prepare for reproduction
Why population stays constant in stationary phase
Why population stays constant in stationary phase
Birth rate equals death rate (equilibrium)
Competition between individuals of same species
Competition between individuals of same species
Intraspecific competition
Why intraspecific competition is more intense
Why intraspecific competition is more intense
Individuals have identical resource requirements
Type of limiting factors: competition, predation, disease
Type of limiting factors: competition, predation, disease
Density-dependent factors
Maximum population density an ecosystem can support
Maximum population density an ecosystem can support
Carrying capacity
Growth pattern: rapid increase then crash before capacity
Growth pattern: rapid increase then crash before capacity
J-shaped growth
Effect of emigration on original population size
Effect of emigration on original population size
Reduces population size