Biotic Factors (AQA GCSE Biology Combined Science): Flashcards
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Biotic factors
Biotic factors
Living components of ecosystem that affect organisms
Effect of plentiful food on population
Effect of plentiful food on population
Increases population; organisms breed more successfully
Effect of food shortage on population
Effect of food shortage on population
Causes population decline
Impact of new predators on prey
Impact of new predators on prey
Reduce prey population; can lead to extinction
Pathogens
Pathogens
Disease-causing organisms (bacteria, viruses, fungi)
Effect of new pathogen on community
Effect of new pathogen on community
Rapid disease spread; no immunity/resistance in population
Competition (biotic factor)
Competition (biotic factor)
Species vie for same resources (food, water, territory)
Resources competed for in ecosystems
Resources competed for in ecosystems
Food, water, territory
Outcome when species is better adapted
Outcome when species is better adapted
Outcompetes less adapted species
Competition effect on less adapted species
Competition effect on less adapted species
Population decline, possibly local extinction