nutrient cycles

Nutrient clycles

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Biology unit 4 Page 7 of 10 - May 18, 2011
Nutrient cycles
Carbon cycle
Global warming / green house effect
Nitrogen cycle
Biotic part of nutrient cycle
Nutrients->producers->organic mols->eaten by consumers->nutrients move up
trophic levels->detrivores release nutrients
Nitrogen fertilisers
Soil stressed, crops removed :. linear not cyclic :. Nutrients need replacing.
Fertilisers do this. >productivity, give N for growth-> larger leaves :. More PS
-> more growth
Effects of fertilisers
Increase productivity
Decrease biodiversity


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