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15 cards from this deck
Variety of living organisms in an ecosystem
Aquaculture
Waste, uneaten food, chemicals & antibiotics
High densities of fish promote spread
Depletes wild fish stocks used for fishmeal
Compete with indigenous species for food & breeding grounds
Species not naturally occurring in an area
No natural predators in new habitat
1930s
Toxic to animals that eat them
Excess nutrients (nitrates) from fertiliser runoff
Block sunlight, preventing plant photosynthesis
Makes water uninhabitable, kills aquatic animals
Sulfur-dioxide emissions from factories
Replanting hedgerows & woodlands or maintaining rainforests
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