Biogeochemical Cycles Flashcards
Name the 3 main biogeochemical cycles
Nitrogen
Carbon
Phosphorus
Name 5 reservoirs nutrients move between in biogeochemical cycles
Atmosphere
Sediments
Oceans
Terrestrial
What does DON stand for
Dissolved organic nitrogen
How does carbon dioxide enter the food web
Grazing
How does carbon dioxide move between the ocean and atmosphere
Solubility pump
How is carbon dioxide released to the atmosphere and ocean
Via respiration
How is carbon dioxide removed from the atmosphere and oceans
Via photosynthesis
What nutrients limit the biological pump
Nitrogen and phosphorus
What process returns nitrogen back to the atmosphere
Denitrification
What naturally fixes N2
Bacteria, Cyanobacteria and lightning
What is the main input of phosphorus into the oceans
Rivers and land runoff
How does carbon cycle from the atmosphere to biota
Photosynthesis or grazing
