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GCSE Biology · key term
An effect that living organisms have on other organisms in an ecosystem.
Used by AQA, Edexcel and OCR
Specification 4.7.1.3 · Paper 2
A living factor that can affect organisms in an ecosystem, such as food availability, predators, pathogens or competition.
Revise: Biotic FactorsA community contains populations of different species living together. Its members affect one another: an animal may eat a plant, become prey for another animal or compete with others for food. These interactions are biotic factors because they involve living organisms.
Specification 9.2 · Paper 2
An effect of living organisms on other organisms in an environment.
Revise: Abiotic and Biotic FactorsAbiotic factors are non-living conditions or substances, whereas biotic factors arise from living organisms and their interactions. A factor may affect one species directly and then affect others that depend on it.
Specification B4.1f, PAG 3 · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
A living component of an environment, or an effect caused by living organisms, that affects other organisms, such as predation or food availability.
Revise: Abiotic and biotic factorsA biotic factor involves living organisms. Both can affect the survival, growth and reproduction of organisms. Over time, this can change a species’ population size or distribution and therefore alter the whole community.
A living influence on organisms in a habitat, such as competitors, predators or plants providing shade.
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
A living part of an ecosystem, such as a plant, animal, fungus or microorganism.
A living influence on organisms, such as competition, predation or disease.
Classify the factor itself: a pathogen is a biotic factor, but a toxic chemical is abiotic.
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