Biochemical cycles

Question 1

What are Biogeochemical Cycles?

Answer 1

interactions
between organisms and their environments that
recycle chemical elements or molecules.

Question 3

What are 6 most import elements?

Answer 3

Caron, Hydrogen, Nitrogen, oxygen, Phosphorus, and sulfur

Question 4

What are Biogeochemical cycles?

Answer 4

interactions
between organisms and their environments that
recycle chemical elements or molecules.

Question 5

What are macro molecules

Answer 5

Carbohydrates, lipids, protein, nucleic acids

Question 6

What nitrogen from the nitrogen cycle can bacteria use?

Answer 6

Nitrogen gas

Question 7

What is considered fixed nitrogen and can be used by other organisms?

Answer 7

Ammonia NH4
Nitrites NO2-
Nitrates NO3-

Question 8

What does the redfield ratio measure?

Answer 8

Carbon: Silica: Nitrogen: Phosphorous
106:40:16:1

Question 9

What are Natural Sources of Nutrients in Estuaries?

Answer 9

water
sediments
river runoff

Question 10

What are Anthropogenic Sources of Nutrients in Estuaries?

Answer 10

urban runoff
residential runoff
agriculture and livestock runoff

Question 11

What controls the flow of nutrients through estuaries?

Answer 11

-Topographical and bathymetric features influence residence time and flushing rates
-Freshwater inputs with high concentrations of nutrients are usually more important than tidal inputs
-Heat input influences stratification and therefore biological processing
-Exchanges across the benthic/water interface
-Submarine groundwater discharge

Question 12

What are global flows of carbon?

Answer 12

fossil fuels
atnosphere
land
epipelagic
mesopelagic