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9 Cards in this Set
- Front
- Back
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1
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Soluble, often artificial, nitrogenous fertilisers applied to fields
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2
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Rainfall causes fertilisers to wash to rivers
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3
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Extra nitrates stimulates growth of suspended algae causing algal bloom
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4
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algae absorb the light, preventing it reaching aquatic plants at the bottom
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5
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aquatic plants are unable to photosynthesis and so die
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6
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bacterial decomposers multiply due to increase in dead plant material
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7
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bacteria respire aerobically, using up available oxygen in
the water |
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8
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lack of dissolved oxygen in the water causes the death of aquatic animals
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9
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This reduces biodiversity
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