Interactions Between Populations (OCR A-Level Biology A): Flashcards
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Practise the cards
10 cards from this deck
Interspecific competition
Interspecific competition
Different species compete for same limited resources
% of world's English bluebells in UK
% of world's English bluebells in UK
50%
Competitive exclusion principle
Competitive exclusion principle
One species outcompetes another, excluding it from the niche
Resource partitioning
Resource partitioning
Species occupy slightly different niches to avoid competition
Character displacement
Character displacement
Species differ in features where they coexist, not apart
Predator-prey cycle pattern
Predator-prey cycle pattern
Predator peaks lag behind prey peaks
Lynx-hare population cycle period
Lynx-hare population cycle period
Approximately 10 years
Bottom-up control
Bottom-up control
Food supply limiting population growth
Top-down control
Top-down control
Predation limiting population growth
Optimal prey size for predators
Optimal prey size for predators
Intermediate-sized prey (best energy cost vs gain balance)