#### Phyto 1 - PI curve for phytoplankton

##### Joao G. Ferreira ★

Simple model to illustrate Steele's equation for primary production of phytoplankton.

The equation is:

Ppot = Pmax I/Iopt exp(1-I/Iopt)

Where:

Ppot: Potential production (e.g. d-1, or mg C m-2 d-1)

Pmax: Maximum production (same units as Ppot)

I: Light energy at depth of interest (e.g. uE m-2 s-1)

Iopt: Light energy at which Pmax occurs (same units as I)

The model contains no state variables, just illustrates the rate of production, by making the value of I equal to the timestep (in days). Move the slider to the left for more pronounced photoinhibition, to the right for photosaturation.

The equation is:

Ppot = Pmax I/Iopt exp(1-I/Iopt)

Where:

Ppot: Potential production (e.g. d-1, or mg C m-2 d-1)

Pmax: Maximum production (same units as Ppot)

I: Light energy at depth of interest (e.g. uE m-2 s-1)

Iopt: Light energy at which Pmax occurs (same units as I)

The model contains no state variables, just illustrates the rate of production, by making the value of I equal to the timestep (in days). Move the slider to the left for more pronounced photoinhibition, to the right for photosaturation.

- 3 weeks 1 day ago

#### Phytoplankton model URI

##### Joao G. Ferreira ★

Simple model to illustrate an annual cycle for phytoplankton biomass in temperate waters.

Potential primary production uses Steele's equation and a Michaelis-Menten (or Monod) function for nutrient limitation. Respiratory losses are only a function of biomass.

Potential primary production uses Steele's equation and a Michaelis-Menten (or Monod) function for nutrient limitation. Respiratory losses are only a function of biomass.

- 2 years 7 months ago

#### Forcing functions (tides and light)

##### Joao G. Ferreira ★

This very simple model generates a tidal curve and a light climate at the sea surface to illustrate the non-linearity of the diel and tidal cycles. This has repercussions on benthic primary (and therefore also secondary) production.

- 2 years 8 months ago

#### Clone of Phyto 1 - PI curve for phytoplankton

##### Francisco Xavier

Simple model to illustrate Steele's equation for primary production of phytoplankton.

The equation is:

Ppot = Pmax I/Iopt exp(1-I/Iopt)

Where:

Ppot: Potential production (e.g. d-1, or mg C m-2 d-1)

Pmax: Maximum production (same units as Ppot)

I: Light energy at depth of interest (e.g. uE m-2 s-1)

Iopt: Light energy at which Pmax occurs (same units as I)

The model contains no state variables, just illustrates the rate of production, by making the value of I equal to the timestep (in days). Move the slider to the left for more pronounced photoinhibition, to the right for photosaturation.

The equation is:

Ppot = Pmax I/Iopt exp(1-I/Iopt)

Where:

Ppot: Potential production (e.g. d-1, or mg C m-2 d-1)

Pmax: Maximum production (same units as Ppot)

I: Light energy at depth of interest (e.g. uE m-2 s-1)

Iopt: Light energy at which Pmax occurs (same units as I)

The model contains no state variables, just illustrates the rate of production, by making the value of I equal to the timestep (in days). Move the slider to the left for more pronounced photoinhibition, to the right for photosaturation.

- 4 years 9 months ago

#### Clone of Phyto 1 - PI curve for phytoplankton

##### Joaomz

Simple model to illustrate Steele's equation for primary production of phytoplankton.

The equation is:

Ppot = Pmax I/Iopt exp(1-I/Iopt)

Where:

Ppot: Potential production (e.g. d-1, or mg C m-2 d-1)

Pmax: Maximum production (same units as Ppot)

I: Light energy at depth of interest (e.g. uE m-2 s-1)

Iopt: Light energy at which Pmax occurs (same units as I)

The model contains no state variables, just illustrates the rate of production, by making the value of I equal to the timestep (in days). Move the slider to the left for more pronounced photoinhibition, to the right for photosaturation.

The equation is:

Ppot = Pmax I/Iopt exp(1-I/Iopt)

Where:

Ppot: Potential production (e.g. d-1, or mg C m-2 d-1)

Pmax: Maximum production (same units as Ppot)

I: Light energy at depth of interest (e.g. uE m-2 s-1)

Iopt: Light energy at which Pmax occurs (same units as I)

The model contains no state variables, just illustrates the rate of production, by making the value of I equal to the timestep (in days). Move the slider to the left for more pronounced photoinhibition, to the right for photosaturation.

- 4 years 2 weeks ago

#### Clone of Phytoplankton model URI

##### Sara Gomes

Simple model to illustrate an annual cycle for phytoplankton biomass in temperate waters.

Potential primary production uses Steele's equation and a Michaelis-Menten (or Monod) function for nutrient limitation. Respiratory losses are only a function of biomass.

Potential primary production uses Steele's equation and a Michaelis-Menten (or Monod) function for nutrient limitation. Respiratory losses are only a function of biomass.

- 3 years 2 weeks ago

#### Clone of Phyto 1 - PI curve for phytoplankton

##### Fábio Cardona

The equation is:

Ppot = Pmax I/Iopt exp(1-I/Iopt)

Where:

Ppot: Potential production (e.g. d-1, or mg C m-2 d-1)

Pmax: Maximum production (same units as Ppot)

I: Light energy at depth of interest (e.g. uE m-2 s-1)

Iopt: Light energy at which Pmax occurs (same units as I)

The model contains no state variables, just illustrates the rate of production, by making the value of I equal to the timestep (in days). Move the slider to the left for more pronounced photoinhibition, to the right for photosaturation.

- 4 years 1 week ago

#### Clone of Clone of Phyto 1 - PI curve for phytoplankton

##### Fábio Cardona

The equation is:

Ppot = Pmax I/Iopt exp(1-I/Iopt)

Where:

Ppot: Potential production (e.g. d-1, or mg C m-2 d-1)

Pmax: Maximum production (same units as Ppot)

I: Light energy at depth of interest (e.g. uE m-2 s-1)

Iopt: Light energy at which Pmax occurs (same units as I)

The model contains no state variables, just illustrates the rate of production, by making the value of I equal to the timestep (in days). Move the slider to the left for more pronounced photoinhibition, to the right for photosaturation.

- 4 years 1 week ago

#### Clone of Phytoplankton model URI

##### Pedro Pato

Simple model to illustrate an annual cycle for phytoplankton biomass in temperate waters.

Potential primary production uses Steele's equation and a Michaelis-Menten (or Monod) function for nutrient limitation. Respiratory losses are only a function of biomass.

Potential primary production uses Steele's equation and a Michaelis-Menten (or Monod) function for nutrient limitation. Respiratory losses are only a function of biomass.

- 3 years 2 weeks ago

#### Clone of Forcing functions (tides and light)

##### Alhambra

This very simple model generates a tidal curve and a light climate at the sea surface to illustrate the non-linearity of the diel and tidal cycles. This has repercussions on benthic primary (and therefore also secondary) production.

- 2 years 8 months ago