EcoService Models Library (ESML)
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Variables Details
: (EM-887)
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EM Identity and Description
EM-887 | |
Document Author
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McKane, R. B., A. Brookes, K. Djang, M. Stieglitz, A. G. Abdelnour, F. Pan, J. J. Halama, P. B. Pettus and D. L. Phillips |
Document Year
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2014 |
Variable General Info
Disturbance type (for example, harvest, fire, grazing) ?Comment:Four disturbance types can be modeled in VELMA: BurnDisturbanceModel, effects of fire; GrazeDisturbanceModel, effects of grazing; FertilizeLsrDisturbanceModel, effects of fertilizer applications; HarvestLsrDisturbanceModel, effects of biomass harvest. Each of these disturbance models specifies where and when a disturbance event will occur. The Burn, Graze and Harvest models have options for specifying how much of each plant tissue and detritus pool (leaves, stems, roots) will be removed and where it goes (offsite and/or to a specified onsite C and N pools). The Fertilize model has options for applying nitrogen as ammonium, nitrate, urea and/or manure. Requirements for implementing a disturbance model include (1) a grid ASCII map of your watershed and associated parameter specifications that determine where and when a disturbance will occur, and (2) parameter specifications that determine which plant biomass and detritus pools will be affected, and the fraction of each pool burned, grazed or harvested and its destination. The user will specify land cover IDs, and one or more loops, years, and Julian days, or ranges of the same to be used for the modeled disturbance. Starting biomass is provided by the VELMA LSR model. |
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Variable ID
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21934 |
Not reported | |
Qualitative-Quantitative
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Qualitative (Class, Rating or Ranking) |
Cardinal-Ordinal
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Non-Ordinal |
Not applicable |
Variable Typology
Disturbance type (for example, harvest, fire, grazing) ?Comment:Four disturbance types can be modeled in VELMA: BurnDisturbanceModel, effects of fire; GrazeDisturbanceModel, effects of grazing; FertilizeLsrDisturbanceModel, effects of fertilizer applications; HarvestLsrDisturbanceModel, effects of biomass harvest. Each of these disturbance models specifies where and when a disturbance event will occur. The Burn, Graze and Harvest models have options for specifying how much of each plant tissue and detritus pool (leaves, stems, roots) will be removed and where it goes (offsite and/or to a specified onsite C and N pools). The Fertilize model has options for applying nitrogen as ammonium, nitrate, urea and/or manure. Requirements for implementing a disturbance model include (1) a grid ASCII map of your watershed and associated parameter specifications that determine where and when a disturbance will occur, and (2) parameter specifications that determine which plant biomass and detritus pools will be affected, and the fraction of each pool burned, grazed or harvested and its destination. The user will specify land cover IDs, and one or more loops, years, and Julian days, or ranges of the same to be used for the modeled disturbance. Starting biomass is provided by the VELMA LSR model. |
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Predictor-Intermediate-Response
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Predictor |
Predictor Variable Type
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Constant or Parameter |
Response Variable Type
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Not applicable |
Data Source/Type
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Not applicable |
Variable Classification Hierarchy
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4. Human-Produced Stressor or Enhancer of Ecosystem Goods and Services Production |
--Harvest activities and related ecological disturbance (except pollutant release) |
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----Other, multiple, unspecified or unclear |
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Variable Spatial Characteristics
Disturbance type (for example, harvest, fire, grazing) ?Comment:Four disturbance types can be modeled in VELMA: BurnDisturbanceModel, effects of fire; GrazeDisturbanceModel, effects of grazing; FertilizeLsrDisturbanceModel, effects of fertilizer applications; HarvestLsrDisturbanceModel, effects of biomass harvest. Each of these disturbance models specifies where and when a disturbance event will occur. The Burn, Graze and Harvest models have options for specifying how much of each plant tissue and detritus pool (leaves, stems, roots) will be removed and where it goes (offsite and/or to a specified onsite C and N pools). The Fertilize model has options for applying nitrogen as ammonium, nitrate, urea and/or manure. Requirements for implementing a disturbance model include (1) a grid ASCII map of your watershed and associated parameter specifications that determine where and when a disturbance will occur, and (2) parameter specifications that determine which plant biomass and detritus pools will be affected, and the fraction of each pool burned, grazed or harvested and its destination. The user will specify land cover IDs, and one or more loops, years, and Julian days, or ranges of the same to be used for the modeled disturbance. Starting biomass is provided by the VELMA LSR model. |
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Spatial Extent Area
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Not recorded for Constant or Parameter Variables |
Spatially Distributed?
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Not recorded for Constant or Parameter Variables |
Observations Spatially Patterned?
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Not recorded for Constant or Parameter Variables |
Spatial Grain Type
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Not recorded for Constant or Paarameter Variables |
Spatial Grain Size
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Not recorded for Constant or Parameter Variables |
Spatial Density
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Not recorded for Constant or Parameter Variables |
EnviroAtlas URL
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Variable Temporal Characteristics
Disturbance type (for example, harvest, fire, grazing) ?Comment:Four disturbance types can be modeled in VELMA: BurnDisturbanceModel, effects of fire; GrazeDisturbanceModel, effects of grazing; FertilizeLsrDisturbanceModel, effects of fertilizer applications; HarvestLsrDisturbanceModel, effects of biomass harvest. Each of these disturbance models specifies where and when a disturbance event will occur. The Burn, Graze and Harvest models have options for specifying how much of each plant tissue and detritus pool (leaves, stems, roots) will be removed and where it goes (offsite and/or to a specified onsite C and N pools). The Fertilize model has options for applying nitrogen as ammonium, nitrate, urea and/or manure. Requirements for implementing a disturbance model include (1) a grid ASCII map of your watershed and associated parameter specifications that determine where and when a disturbance will occur, and (2) parameter specifications that determine which plant biomass and detritus pools will be affected, and the fraction of each pool burned, grazed or harvested and its destination. The user will specify land cover IDs, and one or more loops, years, and Julian days, or ranges of the same to be used for the modeled disturbance. Starting biomass is provided by the VELMA LSR model. |
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Temporal Extent
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Not recorded for Constant or Parameter Variables |
Temporally Distributed?
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Not recorded for Constant or Parameter Variables |
Regular Temporal Grain?
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Not recorded for Constant or Parameter Variables |
Temporal Grain Size Value
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Not recorded for Constant or Parameter Variables |
Temporal Grain Size Units
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Not recorded for Constant or Parameter Variables |
Temporal Density
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Not recorded for Constant or Parameter Variables |
Variable Values
Disturbance type (for example, harvest, fire, grazing) ?Comment:Four disturbance types can be modeled in VELMA: BurnDisturbanceModel, effects of fire; GrazeDisturbanceModel, effects of grazing; FertilizeLsrDisturbanceModel, effects of fertilizer applications; HarvestLsrDisturbanceModel, effects of biomass harvest. Each of these disturbance models specifies where and when a disturbance event will occur. The Burn, Graze and Harvest models have options for specifying how much of each plant tissue and detritus pool (leaves, stems, roots) will be removed and where it goes (offsite and/or to a specified onsite C and N pools). The Fertilize model has options for applying nitrogen as ammonium, nitrate, urea and/or manure. Requirements for implementing a disturbance model include (1) a grid ASCII map of your watershed and associated parameter specifications that determine where and when a disturbance will occur, and (2) parameter specifications that determine which plant biomass and detritus pools will be affected, and the fraction of each pool burned, grazed or harvested and its destination. The user will specify land cover IDs, and one or more loops, years, and Julian days, or ranges of the same to be used for the modeled disturbance. Starting biomass is provided by the VELMA LSR model. |
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Not applicable | |
Min Value
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Not applicable |
Max Value
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Not applicable |
Other Value Type
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Not applicable |
Other Value
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Not applicable |
Variable Variability and Sensitivity
Disturbance type (for example, harvest, fire, grazing) ?Comment:Four disturbance types can be modeled in VELMA: BurnDisturbanceModel, effects of fire; GrazeDisturbanceModel, effects of grazing; FertilizeLsrDisturbanceModel, effects of fertilizer applications; HarvestLsrDisturbanceModel, effects of biomass harvest. Each of these disturbance models specifies where and when a disturbance event will occur. The Burn, Graze and Harvest models have options for specifying how much of each plant tissue and detritus pool (leaves, stems, roots) will be removed and where it goes (offsite and/or to a specified onsite C and N pools). The Fertilize model has options for applying nitrogen as ammonium, nitrate, urea and/or manure. Requirements for implementing a disturbance model include (1) a grid ASCII map of your watershed and associated parameter specifications that determine where and when a disturbance will occur, and (2) parameter specifications that determine which plant biomass and detritus pools will be affected, and the fraction of each pool burned, grazed or harvested and its destination. The user will specify land cover IDs, and one or more loops, years, and Julian days, or ranges of the same to be used for the modeled disturbance. Starting biomass is provided by the VELMA LSR model. |
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Variability Expression Given?
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Not recorded for Constant or Parameter Variables |
Variability Metric
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None |
Variability Value
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None |
Variability Units
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None |
Resampling Used?
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Not recorded for Constant or Parameter Variables |
Variability Expression Used in Modeling?
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Not recorded for Constant or Parameter Variables |
Variable Operational Validation (Response Variables only)
Variable ID
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Validated?
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Validation Approach (within, between, etc.)
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Validation Quality (Qual/Quant)
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Validation Method (Stat/Deviance)
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Validation Metric
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Validation Value
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Validation Units
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Use of Measured Response Data
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