Recycling in Ecosystems (OCR A-Level Biology A): Flashcards
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10 cards from this deck
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Practise the cards
10 cards from this deck
Six essential elements
Six essential elements
Carbon, hydrogen, oxygen, nitrogen, sulphur, phosphorus
Reservoir (nutrient cycling)
Reservoir (nutrient cycling)
Location where an element is stored
Sink (nutrient cycling)
Sink (nutrient cycling)
Long-term reservoir with slow element recycling
Carbon fixation
Carbon fixation
Autotrophs remove CO₂ from atmosphere via photosynthesis
Ammonification
Ammonification
Production of ammonia by microorganisms from organic N
Nitrosomonas function
Nitrosomonas function
Oxidises ammonia to nitrite ions
Nitrobacter function
Nitrobacter function
Oxidises nitrite ions to nitrate ions
Nitrogen fixation
Nitrogen fixation
Conversion of atmospheric N₂ to ammonium ions
Nitrogen-fixing bacteria examples
Nitrogen-fixing bacteria examples
Azotobacter and Rhizobium
Denitrification
Denitrification
Converts nitrate ions back to dinitrogen gas