Reviewing Ecological Cycles

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Makes up about 78% of the atmosphere

Bacteria found in legumes are an important part of the cylce.

burning of fossil fuels releases a large amount of this element back into the atmosphere

excess amounts of this nutrient cause algal blooms

Must be fixed by bacteri before it is available to other organisms

Rarely found in a gaseous from - not found in the atmosphere

available to producers by rock erosion and decomposition of organisms

can be found in soil