Nitrogen And Phosphorus Cycling

Question 1

Inputs

Answer 1

From atmosphere or rocks/materials

Question 2

Outputs

Answer 2

Respiration, denitrification, assimilation/excretion

Question 3

Pool

Answer 3

Standing crop of biomass

Question 4

Flux

Answer 4

How fast material moves in and out

Question 5

Biogeochemical cycles

Answer 5

Describe the movement of water and other materials throughout the abiotic and biotic environment

Question 6

Nitrogen fixation

Answer 6

Occurs via abiotic or biological fixation

Question 7

Abiotic

Answer 7

High energy fixation in atmosphere

Question 8

Biological fixation

Answer 8

N2 is converted into ammonia NH3 by bacteria

Question 9

Ammonification

Answer 9

Organic N is converted to NH4+

Question 10

Nitrification

Answer 10

NH4 is oxidized to form nitrate and nitrite

Question 11

Denitrification

Answer 11

NO3- is reduced to N2O and N2, and returned to atmosphere

Question 12

The conversion of nitrates to nitrogen gas by bacteria is called?

Answer 12

Denitrification

Question 13

The conversion of nitrogen gas to nitrates by bacteria is
called?

Answer 13

Nitrogen fixation

Question 14

Phosphorus cycle

Answer 14

Cycles via water, soils, sediments, and organic tissue

Question 15

Primary production across biomes is dictated by ?

Answer 15

N and P levels