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GCSE Combined Science · key term
The variety of different species of organisms on Earth, or within an ecosystem.
Used by AQA and Edexcel
Specification 4.7.3.1, 4.7.3.2, 4.7.3.3, 4.7.3.4, 4.7.3.5, 4.7.3.6, 5.9.2.3 · Paper 2, Paper 4
Revise: Importance of BiodiversityBiodiversity is the variety of different species of organisms within an ecosystem, or across Earth. It includes all kinds of organisms, not just animals.
The variety of different species of living organisms in an area.
Define biodiversity using the variety of species, not the total number of organisms.
High biodiversity does not mean species are independent: they still depend on one another, but are less reliant on just one species.
Explain a human impact as a chain: activity → damage to habitats or organisms → loss of species → reduced biodiversity.
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The variety of different species of organisms in an ecosystem.
The variety of different living organisms in an area.
The variety of different species of organisms in an ecosystem or on Earth.
Paper 1, Paper 2
The variety of living organisms in an area.
Revise: Human Impact and BiodiversityAn ecosystem includes living organisms and the non-living environment with which they interact. Its biodiversity is the variety of organisms present. A habitat containing several different species has greater species diversity than one containing only a few, even if the total number of organisms is similar.