Biotic Factors (OCR GCSE Biology A (Gateway Science Suite)): Flashcards
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Definition of biotic factors
Definition of biotic factors
Living components of ecosystem affecting survival, reproduction & distribution
What biotic factors influence
What biotic factors influence
Population sizes and community structure
Effect of plentiful food on population
Effect of plentiful food on population
Organisms breed more successfully, population increases
Effect of food shortage on population
Effect of food shortage on population
Population declines due to lack of resources
Impact of new predators on prey species
Impact of new predators on prey species
Reduce prey population, may cause decline or extinction
What are pathogens
What are pathogens
Disease-causing organisms like bacteria, viruses, or fungi
Why new pathogens are dangerous to communities
Why new pathogens are dangerous to communities
Population may have no immunity or resistance to them
Impact of new pathogen on population
Impact of new pathogen on population
Rapid disease spread, can wipe out large portions
What is competition (biotic factor)
What is competition (biotic factor)
Species/individuals vie for same resources (food, water, territory)
Resources competed for in ecosystems
Resources competed for in ecosystems
Food, water, and territory
Outcome when species is better adapted in competition
Outcome when species is better adapted in competition
Outcompetes less adapted species, causing their decline
Extreme result of being outcompeted
Extreme result of being outcompeted
Population decline, may lead to local extinction