SORTIE-ND

Software for spatially-explicit simulation of forest dynamics

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Grid list

In this document:
Average Light grid
Basal Area Light grid
Carbon Value grid
Competition Harvest Results grid
Detailed Substrate grid
Detailed Substrate calcs grid
Dispersed Seeds grid
Gap Light grid
GLI Map grid
Harvest Results grid
Merchantable Timber Value grid
Mortality Episode Results grid
Partitioned Biomass grid
Planting Results grid
Quadrat GLI grid
Relative Neighborhood Density grid
Resource grid
Ripley's K grid
Seed Predators grid
Snag Decay Class Dynamics Basal Area grid
Storm Damage grid
Storm Killed Partitioned Biomass grid
Storm Light grid
Storm Susceptibility grid
Substrate grid
Substrate calcs grid
Substrate Favorability grid
Windstorm Results grid

For more on what grids are, see Grids.

Average Light

This grid is created by the Average Light behavior. It contains the averages of the values of the GLI Map grid. It is important to set the cell sizes of the two grids exactly as you want them. The default grid cell resolution is set to 8 m X 8 m.

Data in the grid

Data member name	Description
GLI	Average GLI value

Basal Area Light

This grid is created by the Basal Area Light behavior. Each grid cell holds tree basal area data and a light level. The grid cell resolution defaults to 8 m X 8 m. You can set whatever new resolution you wish.

Data in the grid

Data member name	Description
Light	The light level as calculated by the Basal Area Light behavior
Conifer Basal Area	The basal area, in square meters, of conifers that count towards the light calculation
Angiosperm Basal Area	The basal area, in square meters, of angiosperms that count towards the light calculation

Carbon Value

This grid is created by the Carbon Value behavior. It holds the amount of carbon and the value of that carbon for each species. This grid has one cell for the whole plot. It will ignore any changes you make to the resolution. If this grid's data is saved in a detailed output file, you can view the contents of this grid as a table using SORTIE's data visualization system.

Data in the grid

Data member name	Description
Mg of Carbon for Species X	The amount of carbon in the plot for Species X, in metric tons
Carbon Value for Species X	The value of the carbon for Species X

Competition Harvest Results

This grid is created by the Competition Harvest behavior. This is where data on competition harvest results is stored. The data is stored raw - no conversion to per-hectare amounts.

The default grid cell resolution is set to one grid cell for the entire plot. You can set whatever new resolution you wish.

Data in the grid

Data member name	Description
Cut Density, species x	Number of trees cut in the current timestep for the given species
Cut Basal Area, species x	Total basal area cut in the current timestep for the given species

DetailedSubstrate

This grid is created by the Detailed Substrate behavior. The grid holds the relative proportions of the various substrate types. If the Harvest behavior is present for the run, then this grid's resolution must match the Harvest Results grid. Otherwise, it defaults to a cell resolution of 8 m X 8 m, which you can change. This grid holds packages with a different data structure from the main grid to track Substrate cohorts.

Data in the grid

Data member name	Description
Proportion of scarified soil	The proportion of the grid cell area that is scarified soil
Proportion of forest floor	The proportion of the grid cell area that is forest floor
Proportion of tip-up mounds	The proportion of the grid cell area that is tip-up mounds
Total Log	Total logs, expressed as a proportion between 0 and 1. The sum of all log proportions
Total Log Volume	Total log volume, in m3 per ha. The sum of all log volumes
Prop Sp Group X Small Decay Y	Species group X, decay class Y small logs, as a proportion between 0 and 1
Prop Sp Group X Large Decay Y	Species group X, decay class Y large logs, as a proportion between 0 and 1
Vol Sp Group X Small Decay Y	Species group X, decay class Y small log volume in m3 per ha
Vol Sp Group X Large Decay Y	Species group X, decay class Y large log volume in m3 per ha

Packages:

Data member name	Description
Substrate cohort age	The age of the substrate cohort, in timesteps
Substrate cohort new scarified soil substrate	The proportion of cell area that is scarified soil added in this cohort
Substrate cohort new tip-up mounds substrate	The proportion of cell area that is tip-up mounds substrate added in this cohort

Detailed Substrate calcs

This grid is called "detailedsubstratecalcs" and is created by the Detailed Substrate behavior. This grid is used for intermediate calculations when calculating the values in the Detailed Substrate grid. The grid cell resolution must match Detailed Substrate's.

Data in the grid

Data member name	Description
Amount of new tip-up mounds	New tip-up mounds area by grid cell, in square meters
New Log Area Sp Group X Small Decay Y	Area of new small logs added this timestep for species group X, decay class Y, in square meters
New Log Area Sp Group X Large Decay Y	Area of new large logs added this timestep for species group X, decay class Y, in square meters
Prop Sp Group X Small Decay Y Timestep Z	Fresh small logs added Z timesteps ago for species group X, decay class Y, as a proportion of grid cell area
Prop Sp Group X Large Decay Y Timestep Z	Fresh large logs added Z timesteps ago for species group X, decay class Y, as a proportion of grid cell area

Dispersed Seeds

This grid is created by the Disperse behaviors. It holds the number of seeds of each species that have been created by dispersal. This grid defaults to a cell resolution of 8 m X 8 m, which you can change.

Data in the grid

Data member name	Description
Number of seeds for Species X	The number of seeds in each grid cell belonging to Species X
Gap status	Whether the cell is in gap (true) or under closed canopy (false). Only used if there are behaviors which use forest cover.
Adult tree count	The count of adult trees, for determining gap status. Only used if there are behaviors which use forest cover.

Gap Light

This grid is created by the Gap Light behavior. Each grid cell holds the cell's gap status, either TRUE or FALSE. The grid cell resolution defaults to 8 m X 8 m. You can set whatever new resolution you wish.

Data in the grid

Data member name	Description
Is Gap	Whether (TRUE) or not (FALSE) that grid cell has gap status

GLI Map

This grid is created by the GLI Map Creator behavior. The grid holds a GLI value in each cell. The grid cell resolution defaults to 8 m X 8 m. You can set whatever new resolution you wish.

Data in the grid

Data member name	Description
GLI	GLI value, as a percentage of full sun between 0 and 100

Harvest Results

This grid is created by the Harvest behavior. This is where data on harvest results is stored. The data is stored raw - no conversion to per-hectare amounts.

The grid cell resolution is set to 8 m X 8 m. You cannot change the grid cell resolution for this grid.

Data in the grid

Data member name	Description
Harvest Type	Type of harvest that occurred in the current timestep, or -1 if none has occurred
Cut Density, species x, cut range y	Number of trees cut in the current timestep for the given species and cut range
Cut Basal Area, species x, cut range y	Total basal area cut in the current timestep for the given species and cut range

Merchantable Timber Value

This grid is created by the Merchantable Timber Value behavior. It holds the merchantable timber value for each species. This grid has one cell for the whole plot. It will ignore any changes you make to the resolution. If this grid's data is saved in a detailed output file, you can view the contents of this grid as a table using SORTIE's data visualization system.

Data in the grid

Data member name	Description
Value for Species X	The merchantable timber value for Species X

Mortality Episode Results

This grid is created by the Episodic Mortality behavior. This is where data on planned mortality episode results is stored. The data is stored raw - no conversion to per-hectare amounts.

The grid cell resolution is set to 8 m X 8 m. You cannot change the grid cell resolution for this grid.

Data in the grid

Data member name	Description
Cut Density, species x, cut range y	Number of trees killed in the current timestep for the given species and cut range
Cut Basal Area, species x, cut range y	Total basal area killed in the current timestep for the given species and cut range

Partitioned Biomass

This grid is created by the Partitioned DBH Biomass and Partitioned Palm Biomass behaviors. This is where the amount of biomass is stored, partitioned into leaf, bole, and branch (if applicable) biomass. All data is stored raw, no conversion to per-hectare amounts.

The grid cell resolution is set to 8 m X 8 m. You can change this to whatever you wish. The grid is shared by the two behaviors mentioned above, so changing it for one changes it for both.

Data in the grid

Data member name	Description
Mg Leaf Biomass for [species X]	Amount of leaf biomass for species X, in Mg
Mg Bole Biomass for [species X]	Amount of bole biomass for species X, in Mg
Mg Branch Biomass for [species X]	Amount of branch biomass for species X, in Mg
Mg N for [species X]	Amount of N for species X, in Mg
Mg P for [species X]	Amount of P for species X, in Mg
Mg SLA for [species X]	Amount of SLA for species X, in Mg
Mg Lignin for [species X]	Amount of lignin for species X, in Mg
Mg Fiber for [species X]	Amount of fiber for species X, in Mg
Mg Cellulose for [species X]	Amount of cellulose for species X, in Mg
Mg Tannins for [species X]	Amount of tannins for species X, in Mg
Mg Phenolics for [species X]	Amount of phenolics for species X, in Mg
Mg Leaf Palm Biomass for [species X]	Amount of palm leaf biomass for species X, in Mg
Mg Bole Palm Biomass for [species X]	Amount of palm bole biomass for species X, in Mg

Planting Results

This grid is created by the Planting behavior. This is where data on planting results is stored. The data is stored raw - no conversion to per-hectare amounts.

The grid cell resolution is set to 8 m X 8 m. You cannot change the grid cell resolution for this grid.

Data in the grid

Data member name	Description
Planted Species X	Number of trees of Species X cut in the current timestep

Quadrat GLI

This grid is created by the Quadrat-based GLI Light behavior. The grid holds a GLI value in each cell ("quadrat" being a term previously used in SORTIE to describe small grid cells). The grid cell resolution defaults to 2 m X 2 m. You can set whatever new resolution you wish.

Data in the grid

Data member name	Description
GLI	GLI value, or -1 if there were no trees to which to assign a GLI value in that grid cell

Relative Neighborhood Density

This grid holds values for the Relative Neighborhood Density (Ω ) statistic as calculated by the Relative Neighborhood Density Calculator behavior. The grid holds an Ω value for each distance increment for each species. This can be a great many values. The grid cell resolution is always set to one cell covering the entire plot. You cannot change this.

Data in the grid

Data member name	Description
Max Distance	Maximum distance to which to calculate Ω , in meters. Including this in the output is not necessary but will improve the SORTIE graphing capability.
Distance Inc	How often to calculate Ω , in meters. Including this in the output is not necessary but will improve the SORTIE graphing capability.
Species X Dist Y Omega Value	The Ω value for Species X at the Yth distance increment. This is not necessarily the distance in meters.

Resource

This grid holds values for a second growth resource for use by the Double resource relative growth and Growth and Resource-Based Mortality behaviors. The actual identity of the resource is unknown and unimportant. The grid holds a value for resource level in each cell and it is assumed that the units scale appropriately to the parameters for the growth behavior. The grid cell resolution defaults to 8 m X 8 m. You can set whatever new resolution you wish.

Data in the grid

Data member name	Description
Resource	Resource amount, in whatever units are appropriate

Ripley's K

This grid holds values for the Ripley's K statistic as calculated by the Ripley's K Calculator behavior. The grid holds a K value for each distance increment for each species. This can be a great many values. The grid cell resolution is always set to one cell covering the entire plot. You cannot change this.

Data in the grid

Data member name	Description
Max Distance	Maximum distance to which to calculate K, in meters. Including this in the output is not necessary but will improve the SORTIE graphing capability.
Distance Inc	How often to calculate K, in meters. Including this in the output is not necessary but will improve the SORTIE graphing capability.
All Species Dist Y K Value	The K value for all plot trees at the Yth distance increment. This is not necessarily the distance in meters.
Species X Dist Y K Value	The K value for Species X at the Yth distance increment. This is not necessarily the distance in meters.

Seed Predators grid

This grid is created by the Functional response seed predation behavior. It holds the number of seed predators in each seed grid at the end of the predation model run. This grid's resolution must match that of "Dispersed Seeds".

Data in the grid

Data member name	Description
Number Predators	The number of predators in each grid cell.

Snag Decay Class Dynamics Basal Area grid

This grid is created by the Snag Decay Class Dynamics behavior. It holds the amount of basal area for live and cut trees. Maps and grid resolution changes for this grid are not honored.

Data in the grid

Data member name	Description
Live BA Per Ha	The amount of basal area, in square meters per hectare, of live adults.
Cut BA Per Ha	The amount of basal area, in square meters per hectare, of trees harvested this timestep.

Storm Damage

This grid is created by the Storm disturbance behavior. Each grid cell holds a storm damage index between 0 and 1. The grid resolution default is 8 m X 8 m. You can change this to whatever you wish, but if you are also using the grid Storm Susceptibility, the resolutions must match.

Data in the grid

Data member name	Description
Damage Index	The mean storm damage index for all storms occurring in the past timestep, from 0 (no damage) to 1 (total damage)
Time Since Last Storm	The number of years since the last storm occurred in this cell. The last storm is any storm at all of any strength.

Packages:

Data member name	Description
Single Storm Damage Index	Storm damage index for a single storm event

Storm Killed Partitioned Biomass

This grid is created by the Storm Killed Partitioned DBH Biomass and Storm Killed Partitioned Palm Biomass behaviors. This is where the amount of biomass is stored, partitioned into leaf, bole, and branch (if applicable) biomass. All data is stored raw, no conversion to per-hectare amounts.

The grid cell resolution is set to 8 m X 8 m. You can change this to whatever you wish. The grid is shared by the two behaviors mentioned above, so changing it for one changes it for both.

Data in the grid

Data member name	Description
Mg Leaf Biomass for [species X]	Amount of storm-killed leaf biomass for species X, in Mg
Mg Bole Biomass for [species X]	Amount of storm-killed bole biomass for species X, in Mg
Mg Branch Biomass for [species X]	Amount of storm-killed branch biomass for species X, in Mg
Mg Leaf Palm Biomass for [species X]	Amount of storm-killed palm leaf biomass for species X, in Mg
Mg Bole Palm Biomass for [species X]	Amount of storm-killed palm bole biomass for species X, in Mg

Storm Light

This grid is created by the Storm Light behavior. Each grid cell holds a light level value. The grid cell resolution defaults to 8 m X 8 m. You can set whatever new resolution you wish.

Data in the grid

Data member name	Description
Light	The light level as calculated by the Storm Light behavior

Storm Susceptibility

This grid is created by the Storm disturbance behavior. Each grid cell holds a storm susceptibility index between 0 and 1. The grid resolution default is 8 m X 8 m. You can change this to whatever you wish, but if you are also using the grid Storm Damage, the resolutions must match.

Data in the grid

Data member name	Description
Susceptibility	A storm damage susceptibility for each cell, from 0 (not susceptible to damage) to > 1 (very susceptible to damage)

Substrate

This grid is created by the Substrate behavior. The grid holds the relative proportions of the various substrate types. If the Harvest behavior is present for the run, then this grid's resolution must match the Harvest Results grid. Otherwise, it defaults to a cell resolution of 8 m X 8 m, which you can change. This grid holds packages with a different data structure from the main grid to track Substrate cohorts.

Data in the grid

Data member name	Description
Proportion of scarified soil	The proportion of the grid cell area that is scarified soil
Proportion of forest floor	The proportion of the grid cell area that is forest floor
Proportion of tip-up mounds	The proportion of the grid cell area that is tip-up mounds
Proportion of fresh logs	The proportion of the grid cell area that is fresh logs
Proportion of decayed logs	The proportion of the grid cell area that is decayed logs

Packages:

Data member name	Description
Substrate cohort age	The age of the substrate cohort, in timesteps
Substrate cohort new scarified soil substrate	The proportion of cell area that is scarified soil added in this cohort
Substrate cohort new tip-up mounds substrate	The proportion of cell area that is tip-up mounds substrate added in this cohort
Substrate cohort new fresh logs	The proportion of cell area that is fresh logs added in this cohort

Substrate calcs

This grid is called "substratecalcs" and is created by the Substrate behavior. This grid is used for intermediate calculations when calculating the values in the Substrate grid. The grid cell resolution must match Substrate's.

Data in the grid

Data member name	Description
Amount of new tip-up mounds	New tip-up mounds area by grid cell, in square meters
Fresh logs X timesteps ago	Fresh logs added X timesteps ago up to the value in the Substrate parameter "Maximum number of years that decay occurs" (converted to timesteps), as a proportion of grid cell area

Substrate favorability

This grid is created by either the Substrate Dependent Seed Survival No Gap Status or the Substrate Dependent Seed Survival With Gap Status behavior. It holds the proportion of seeds expected to germinate on the substrate composite of the grid cell. The cell resolution must match the "Substrate" grid, above.

Data in the grid

Data member name	Description
Favorability Index - Species X	The proportion of seeds of Species X expected to germinate in that cell

Windstorm Results

This grid is created by the Windstorm behavior. It holds information on what windstorms happened during each timestep. This grid has one cell for the whole plot. It will ignore any changes you make to the resolution.

The data is held in grid packages. There is one package for each storm event. No package means no storms. If this grid's data is saved in a detailed output file, you can view the contents of this grid as a table using SORTIE's data visualization system.

Data in the grid

There is one of these for each storm event.

Data member name	Description
Storm Severity	The severity of the storm that occurred, between 0 and 1
Basal Area Dead For Species X	The basal area killed in this storm for Species X
Density Dead For Species X	The number of stems killed in this storm for Species X

Last updated: 19-Sep-2007 06:54 AM