What is biodiversity?
Reveal answer
The variety of species in an area.
Key words: variety
5(a) THE ORGANISM IN THE ENVIRONMENT · RECALL
5.3B Biodiversity
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Why is high biodiversity good?
Reveal answer
Many interactions → stable ecosystem.
Key words: stable
Which farming practice reduces biodiversity?
Reveal answer
Monoculture.
Key words: monoculture
What is species richness?
Reveal answer
The number of different species.
Key words: number
What is meant by the term biodiversity?
Reveal answer
The variety of living organisms in an area.
Key words: biodiversity
What is meant by the term species richness?
Reveal answer
The number of different species in an area.
Key words: species richness
What is meant by the term evenness?
Reveal answer
How equally individuals are distributed among the species present.
Key words: evenness
What is meant by the term resilience?
Reveal answer
The ability of an ecosystem to recover from disturbance.
Key words: resilience
Describing biodiversity, Species richness. What it describes? Example?
Reveal answer
What it describes: Number of different species present. Example: Meadow A has 12 plant species.
Key words: Species richness
Describing biodiversity, Evenness. What it describes? Example?
Reveal answer
What it describes: How equally individuals are spread among species. Example: One dominant grass gives low evenness.
Key words: Evenness
Describing biodiversity, Genetic diversity (wider meaning). What it describes? Example?
Reveal answer
What it describes: Variety of alleles within a species. Example: Many varieties of wild wheat.
Key words: Genetic diversity (wider meaning)
Describing biodiversity, Population size. What it describes? Example?
Reveal answer
What it describes: Number of one species (not a biodiversity measure alone). Example: 5000 daisies on a lawn.
Key words: Population size
True or false, and why? “More individuals means more biodiversity.”
Reveal answer
False. Biodiversity is about variety. Thousands of one species is low diversity.
True or false, and why? “Biodiversity only means animals.”
Reveal answer
False. It includes plants, fungi, microorganisms and all other living organisms.
True or false, and why? “High biodiversity guarantees an ecosystem cannot be damaged.”
Reveal answer
False. It often increases resilience, but losing key species or severe disturbance can still cause large changes.