Adaptations, Interdependence & Competition (AQA GCSE Biology): Flashcards

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Ecosystems
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Define: Organism

A single living individual

Define: Population

All organisms of same species in one habitat

Define: Community

All populations of different species living together in a habitat

Define: Ecosystem

Community + non-living parts of environment interacting

Define: Abiotic factors

Non-living conditions/things

Define: Biotic factors

Living things

Define: Habitat

Where an organism lives

What 3 things do animals compete for?

Food, mates, territory

What do plants mainly compete for?

Light, water, space, nutrients

How does light intensity affect communities?

Affects how well plants can photosynthesise

How does temperature affect organisms?

Affects how active organisms are

How does food availability affect communities?

Determines how many organisms can survive

Effect of new predators arriving?

Can reduce prey populations

What happens when one species outcompetes another?

Can lead to local extinction of weaker competitor

List ecosystem levels (smallest to largest)

Organism → population → community → ecosystem

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