# Small Phytoplankton N, Large Phytoplankton N, Microphytobenthos N, Trichodesmium Nitrogen

## Small Phytoplankton N

Total structural biomass of nitrogen of the Small (smaller than 2 micro metres) phytoplankton population. All microalgae have a C:N:P ratio of the structural material of 106:16:1. Thus the mass of phosphorus in the structural material of a population with a biomass B is given by: 1/16 31/14 B and the mass of carbon by: 106/16 12/14 B. The number of cells is given by B=mN.

## Large Phytoplankton N

Total structural biomass of nitrogen of the Large (larger than 2 micro metres) phytoplankton population. All microalgae have a C:N:P ratio of the structural material of 106:16:1. Thus the mass of phosphorus in the structural material of a population with a biomass B is given by: 1/16 31/14 B and the mass of carbon by: 106/16 12/14 B. The number of cells is given by B=mN.

## Microphytobenthos N

Total structural biomass of nitrogen of benthic microalgae: fast-sinking diatoms that are suspended primarily in the top layer of sediment porewaters. All microalgae have a C:N:P ratio of the structural material of 106:16:1. Thus the mass of phosphorus in the structural material of a population with a biomass B is given by: 1/16 31/14 B and the mass of carbon by: 106/16 12/14 B. The number of cells is given by B=mN.

## Trichodesmium Nitrogen

Total structural biomass of nitrogen of trichodesmium. All microalgae have a C:N:P ratio of the structural material of 106:16:1. Thus the mass of phosphorus in the structural material of a population with a biomass B is given by: 1/16 31/14 B and the mass of carbon by: 106/16 12/14 B. The number of cells is given by B=mN.