EcoService Models Library (ESML)

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Variables Details

: (EM-491)

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EM Identity and Description

EM ID variable.detail.emIdHelp ?	EM-491
Document Author variable.detail.emDocumentAuthorHelp ?	US EPA Office of Research and Development - National Exposure Research Laboratory
Document Year variable.detail.emDocumentYearHelp ?	2013

Variable General Info

Name variable.detail.varNameHelp ?	12-digit hydrological unit code (HUC12)	Cropland class ? Comment: USDA National Agricultural Statistics Service 2010 Cropland Data Layer (CDL).	Land use/land cover ? Comment: 2006 National Land Cover Dataset (NLCD).	Average bee species foraging distance from nest	Crop requires/benefits from pollination (y/n by pixel) ? Comment: Variable is a constant with respect to the driving class variable; Cropland class.	Pollinator habitat - tree class (y/n by pixel) ? Comment: Variable is a constant with respect to the driving class variables; Land use/land cover, and Cropland class.	Acres of pollinated crops with no nearby pollinator habitat (per HUC12)
Variable ID variable.detail.varIdHelp ?	10682	10679	10672	10681	10680	10678	10684
Symbol variable.detail.varSymbolHelp ?	HUC	CDL	LULC	Not reported	Not reported	Not reported	Not reported
Qualitative-Quantitative variable.detail.continuousCategoricalHelp ?	Qualitative (Class, Rating or Ranking)	Qualitative (Class, Rating or Ranking)	Qualitative (Class, Rating or Ranking)	Quantitative (Cardinal Only)	Qualitative (Class, Rating or Ranking)	Qualitative (Class, Rating or Ranking)	Quantitative (Cardinal Only)
Cardinal-Ordinal variable.detail.cardinalOrdinalHelp ?	Non-Ordinal	Non-Ordinal	Non-Ordinal	Cardinal	Non-Ordinal	Non-Ordinal	Cardinal
Units variable.detail.varUnitsHelp ?	Not applicable	Not applicable	Not applicable	km	Not applicable	Not applicable	acres

Variable Typology

Name variable.detail.varNameHelp ?	12-digit hydrological unit code (HUC12)	Cropland class ? Comment: USDA National Agricultural Statistics Service 2010 Cropland Data Layer (CDL).	Land use/land cover ? Comment: 2006 National Land Cover Dataset (NLCD).	Average bee species foraging distance from nest	Crop requires/benefits from pollination (y/n by pixel) ? Comment: Variable is a constant with respect to the driving class variable; Cropland class.	Pollinator habitat - tree class (y/n by pixel) ? Comment: Variable is a constant with respect to the driving class variables; Land use/land cover, and Cropland class.	Acres of pollinated crops with no nearby pollinator habitat (per HUC12)
Predictor-Intermediate-Response variable.detail.displayVariableTypeHelp ?	Predictor	Predictor	Predictor	Predictor	Predictor	Predictor	Response
Predictor Variable Type variable.detail.displayPredictorVariableTypeHelp ?	Time- or Space-varying Variable	Time- or Space-varying Variable	Time- or Space-varying Variable	Constant or Parameter	Constant or Parameter	Constant or Parameter	Not applicable
Response Variable Type variable.detail.resClassHelp ?	Not applicable	Not applicable	Not applicable	Not applicable	Not applicable	Not applicable	Computed Variable
Data Source/Type variable.detail.dataTypeHelp ?	Map or database (e.g., wide coverage, wide availability, measured or modeled) ? Comment: National Hydrography Dataset Plus (NHDPlus) V2 WBD Snapshot, EnviroAtlas version - which includes updated 12-digit HUC boundaries for the Conterminous United States.	Map or database (e.g., wide coverage, wide availability, measured or modeled) ? Comment: USDA National Agricultural Statistics Service 2010 Cropland Data Layer (CDL).	Map or database (e.g., wide coverage, wide availability, measured or modeled) ? Comment: 2006 National Land Cover Dataset (NLCD).	Transferred Values (e.g., from literature; transferred spatially, temporally or across scales) ? Comment: Cane, J.H. 2001. Habitat fragmentation and native bees: A premature verdict? Conservation Ecology 5(1):3.	Derived from a look-up table	Map or database (e.g., wide coverage, wide availability, measured or modeled)	Not applicable
Variable Classification Hierarchy variable.detail.vchLevel1Help ?	2. Land Surface (or Water Body) Cover, Use, Substrate, or Metric	2. Land Surface (or Water Body) Cover, Use, Substrate, or Metric	2. Land Surface (or Water Body) Cover, Use, Substrate, or Metric	5. Ecosystem Attributes and Potential Supply of Ecosystem Goods and Services	2. Land Surface (or Water Body) Cover, Use, Substrate, or Metric	2. Land Surface (or Water Body) Cover, Use, Substrate, or Metric	6. Non-monetary Indicators of Human Demand, Use or Benefit of Ecosystem Goods and Services
	--Demarcation of watershed, channel, floodplain, shore, coastline, flowline	--Land use/land cover type or dominant habitat type	--Land use/land cover type or dominant habitat type	--Biological characteristics, processes or requirements of living ecosystem components	--Land use/land cover type or dominant habitat type	--Land use/land cover type or dominant habitat type	--Demand for or use of regulation & maintenance services-Maintenance of conditions
	----Watershed demarcation or dimension	----Agroecosystems	----Other, multiple, unspecified or unclear	----Biological characteristics, processes or requirements of fauna	----Agroecosystems	----Habitat type designations	----Pollination and seed dispersal
		------Other, multiple, unspecified or unclear		------Pollinators (nonspecific)	------Other, multiple, unspecified or unclear	------Other, multiple, unspecified or unclear

Variable Spatial Characteristics

Name variable.detail.varNameHelp ?	12-digit hydrological unit code (HUC12)	Cropland class ? Comment: USDA National Agricultural Statistics Service 2010 Cropland Data Layer (CDL).	Land use/land cover ? Comment: 2006 National Land Cover Dataset (NLCD).	Average bee species foraging distance from nest	Crop requires/benefits from pollination (y/n by pixel) ? Comment: Variable is a constant with respect to the driving class variable; Cropland class.	Pollinator habitat - tree class (y/n by pixel) ? Comment: Variable is a constant with respect to the driving class variables; Land use/land cover, and Cropland class.	Acres of pollinated crops with no nearby pollinator habitat (per HUC12)
Spatial Extent Area variable.detail.spExtentHelp ?	>1,000,000 km^2	>1,000,000 km^2	>1,000,000 km^2	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	>1,000,000 km^2
Spatially Distributed? variable.detail.spDistributedHelp ?	Yes	Yes	Yes	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Yes
Observations Spatially Patterned? variable.detail.regularSpGrainHelp ?	Yes	Yes	Yes	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Yes
Spatial Grain Type variable.detail.spGrainTypeHelp ?	other (specify), for irregular (e.g., stream reach, lake basin) ? Comment: 12 digit HUC.	Area, for pixel or radial feature	Area, for pixel or radial feature	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	other (specify), for irregular (e.g., stream reach, lake basin) ? Comment: 12 digit HUC.
Spatial Grain Size variable.detail.spGrainSizeHelp ?	irregular	30 m x 30 m	30m x 30m	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	irregular
Spatial Density variable.detail.spDensityHelp ?	Not applicable	Not applicable	Not applicable	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not applicable
EnviroAtlas URL variable.detail.enviroAtlasURLHelp ?	The Watershed Boundary Dataset (WBD)	GAP Ecological Systems			GAP Ecological Systems

Variable Temporal Characteristics

Name variable.detail.varNameHelp ?	12-digit hydrological unit code (HUC12)	Cropland class ? Comment: USDA National Agricultural Statistics Service 2010 Cropland Data Layer (CDL).	Land use/land cover ? Comment: 2006 National Land Cover Dataset (NLCD).	Average bee species foraging distance from nest	Crop requires/benefits from pollination (y/n by pixel) ? Comment: Variable is a constant with respect to the driving class variable; Cropland class.	Pollinator habitat - tree class (y/n by pixel) ? Comment: Variable is a constant with respect to the driving class variables; Land use/land cover, and Cropland class.	Acres of pollinated crops with no nearby pollinator habitat (per HUC12)
Temporal Extent variable.detail.tempExtentHelp ?	2015	2010	2006	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	2001-2015
Temporally Distributed? variable.detail.tempDistributedHelp ?	Not applicable	Not applicable	No	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not applicable
Regular Temporal Grain? variable.detail.regularTempGrainHelp ?	Not applicable	Not applicable	Not applicable	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not applicable
Temporal Grain Size Value variable.detail.tempGrainSizeValHelp ?	Not applicable	Not applicable	Not applicable	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not applicable
Temporal Grain Size Units variable.detail.tempGrainSizeUnitHelp ?	Not applicable	Not applicable	Not applicable	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not applicable
Temporal Density variable.detail.tempDensityHelp ?	Not applicable	Not applicable	Not applicable	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not applicable

Variable Values

Name variable.detail.varNameHelp ?	12-digit hydrological unit code (HUC12)	Cropland class ? Comment: USDA National Agricultural Statistics Service 2010 Cropland Data Layer (CDL).	Land use/land cover ? Comment: 2006 National Land Cover Dataset (NLCD).	Average bee species foraging distance from nest	Crop requires/benefits from pollination (y/n by pixel) ? Comment: Variable is a constant with respect to the driving class variable; Cropland class.	Pollinator habitat - tree class (y/n by pixel) ? Comment: Variable is a constant with respect to the driving class variables; Land use/land cover, and Cropland class.	Acres of pollinated crops with no nearby pollinator habitat (per HUC12)
Units variable.detail.estUnitHelp ?	Not applicable	Not applicable	Not applicable	Not reported	Not applicable	Not applicable	acres
Min Value variable.detail.minEstHelp ?	Not applicable	Not applicable	Not applicable	Not reported	Not applicable	Not applicable	0.0
Max Value variable.detail.estHelp ?	Not applicable	Not applicable	Not applicable	Not reported	Not applicable	Not applicable	24,457.2
Other Value Type variable.detail.natureOtherEstHelp ?	Not applicable	Not applicable	Not applicable	Mean	Not applicable	Not applicable	Not applicable
Other Value variable.detail.otherEstHelp ?	Not applicable	Not applicable	Not applicable	2.8	Not applicable	Not applicable	Not reported

Variable Variability and Sensitivity

Name variable.detail.varNameHelp ?	12-digit hydrological unit code (HUC12)	Cropland class ? Comment: USDA National Agricultural Statistics Service 2010 Cropland Data Layer (CDL).	Land use/land cover ? Comment: 2006 National Land Cover Dataset (NLCD).	Average bee species foraging distance from nest	Crop requires/benefits from pollination (y/n by pixel) ? Comment: Variable is a constant with respect to the driving class variable; Cropland class.	Pollinator habitat - tree class (y/n by pixel) ? Comment: Variable is a constant with respect to the driving class variables; Land use/land cover, and Cropland class.	Acres of pollinated crops with no nearby pollinator habitat (per HUC12)
Variability Expression Given? variable.detail.variabilityExpHelp ?	Not applicable	Not applicable	No	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	No
Variability Metric variable.detail.variabilityMetricHelp ?	None	None	None	None	None	None	None
Variability Value variable.detail.variabilityValueHelp ?	None	None	None	None	None	None	None
Variability Units	None	None	None	None	None	None	None
Resampling Used? variable.detail.bootstrappingHelp ?	Not applicable	Not applicable	Not applicable	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not applicable
Variability Expression Used in Modeling? variable.detail.variabilityUsedHelp ?	Not applicable	Not applicable	Not applicable	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not applicable

Variable Operational Validation (Response Variables only)

Name variable.detail.varNameHelp ?	Acres of pollinated crops with no nearby pollinator habitat (per HUC12)
Variable ID variable.detail.varIdHelp ?	10684
Validated? variable.detail.resValidatedHelp ?	Not applicable
Validation Approach (within, between, etc.) variable.detail.validationApproachHelp ?	None
Validation Quality (Qual/Quant) variable.detail.validationQualityHelp ?	None
Validation Method (Stat/Deviance) variable.detail.validationMethodHelp ?	None
Validation Metric variable.detail.validationMetricHelp ?	None
Validation Value variable.detail.validationValHelp ?	None
Validation Units	None
Use of Measured Response Data variable.detail.measuredResponseDataHelp ?	None