Oxygen Regulation Flashcards
1
Q
What do Mesozoic sediments say about past oxygen levels
A
Charcoal shows that oxygen made up over 15% of atmosphere
2
Q
Impact of anoxic oceans on oxygen levels
A
Anoxia increases phosphorus production which means more primary production meaning more buried carbon = more oxygen in atmosphere
3
Q
Phosphorus is a ____ Nutrient
A
Limiting
4
Q
What 3 elements are found in proportion to each other in plants
A
Carbon, nitrogen and phosphorus
5
Q
What process increases fluxes of phosphorus to oceans
A
Forest fires
