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15 cards from this deck
Biogeochemical cycles
Energy flows one direction; nutrients cycle continuously
Fundamental building block of all organic molecules
Removes CO2_22 from atmosphere to make carbohydrates
Releases CO2_22 back to atmosphere
Absorb more carbon than they release (e.g. forests, oceans)
Fossil fuel combustion, deforestation, volcanic eruptions
From 0.028% to over 0.042%
Through burping
78%
Converts atmospheric N2_22 into usable nitrogen compounds
Root nodules
Nitrates (NO3−_3^-3−)
Converts nitrates back into nitrogen gas
Excess nutrients cause rapid algae growth (algal blooms)
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