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Variables Details
: (EM-338)
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EM-338: Modelling pollination services across agricultural landscapes
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EM Identity and Description
| EM-338 | |
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Document Author
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Lonsdorf, E., Kremen, C., Ricketts, T., Winfree, R., Williams, N., and S. Greenleaf |
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Document Year
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2009 |
Variable General Info
Farm (y/n) ?Comment:Indexed by o. During the flowering season of 2001, bee visits were recorded at 12 watermelon sites and 11 sunflower sites. In 2002, bee visits were recorded at six additional sunflower sites. |
Land cover types ?Comment:Each indexed by j, Land cover type is a class driver variable determining Suitability for nesting type, Suitability for foraging, and proportion and distance variables. |
Pollinator species ?Comment:Indexed by s, Pollinator species is a class variable that determinines values for the variables; Nesting suitability of nesting types, Relative abundance of pollinator species in landscape, Crops pollinator species requirement, Expected pollinator species foraging distance, and Weight describing importance of floral season. |
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Variable ID
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6630 | 6625 | 6632 |
| O | J | S | |
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Qualitative-Quantitative
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Qualitative (Class, Rating or Ranking) | Qualitative (Class, Rating or Ranking) | Qualitative (Class, Rating or Ranking) |
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Cardinal-Ordinal
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Non-Ordinal | Non-Ordinal | Non-Ordinal |
| Not applicable | Not applicable | Not applicable |
Variable Typology
Farm (y/n) ?Comment:Indexed by o. During the flowering season of 2001, bee visits were recorded at 12 watermelon sites and 11 sunflower sites. In 2002, bee visits were recorded at six additional sunflower sites. |
Land cover types ?Comment:Each indexed by j, Land cover type is a class driver variable determining Suitability for nesting type, Suitability for foraging, and proportion and distance variables. |
Pollinator species ?Comment:Indexed by s, Pollinator species is a class variable that determinines values for the variables; Nesting suitability of nesting types, Relative abundance of pollinator species in landscape, Crops pollinator species requirement, Expected pollinator species foraging distance, and Weight describing importance of floral season. |
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Predictor-Intermediate-Response
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Predictor |
Predictor |
Predictor |
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Predictor Variable Type
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Time- or Space-varying Variable |
Time- or Space-varying Variable |
Time- or Space-varying Variable |
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Response Variable Type
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Not applicable | Not applicable | Not applicable |
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Data Source/Type
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Map or database (e.g., wide coverage, wide availability, measured or modeled) | Map or database (e.g., wide coverage, wide availability, measured or modeled) | Derived from meta-analysis (i.e., multi-study, multi-location) |
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Variable Classification Hierarchy
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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 |
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--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 |
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----Agroecosystems |
----Other, multiple, unspecified or unclear |
----Biological characteristics, processes or requirements of fauna |
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------Row crop |
------Pollinators (nonspecific) |
Variable Spatial Characteristics
Farm (y/n) ?Comment:Indexed by o. During the flowering season of 2001, bee visits were recorded at 12 watermelon sites and 11 sunflower sites. In 2002, bee visits were recorded at six additional sunflower sites. |
Land cover types ?Comment:Each indexed by j, Land cover type is a class driver variable determining Suitability for nesting type, Suitability for foraging, and proportion and distance variables. |
Pollinator species ?Comment:Indexed by s, Pollinator species is a class variable that determinines values for the variables; Nesting suitability of nesting types, Relative abundance of pollinator species in landscape, Crops pollinator species requirement, Expected pollinator species foraging distance, and Weight describing importance of floral season. |
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Spatial Extent Area
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1000-10,000 km^2. | 1000-10,000 km^2. | 1000-10,000 km^2. |
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Spatially Distributed?
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Yes | Yes | Yes |
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Observations Spatially Patterned?
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Yes | Yes | Yes |
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Spatial Grain Type
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area, for pixel or radial feature | area, for pixel or radial feature | area, for pixel or radial feature |
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Spatial Grain Size
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30 m x 30 m | 30 m x 30 m | 30 m x 30 m |
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Spatial Density
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Not applicable | Not applicable | Not applicable |
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EnviroAtlas URL
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GAP Ecological Systems |
Variable Temporal Characteristics
Farm (y/n) ?Comment:Indexed by o. During the flowering season of 2001, bee visits were recorded at 12 watermelon sites and 11 sunflower sites. In 2002, bee visits were recorded at six additional sunflower sites. |
Land cover types ?Comment:Each indexed by j, Land cover type is a class driver variable determining Suitability for nesting type, Suitability for foraging, and proportion and distance variables. |
Pollinator species ?Comment:Indexed by s, Pollinator species is a class variable that determinines values for the variables; Nesting suitability of nesting types, Relative abundance of pollinator species in landscape, Crops pollinator species requirement, Expected pollinator species foraging distance, and Weight describing importance of floral season. |
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Temporal Extent
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2001-2002 | 2001-2002 | 2001-2002 |
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Temporally Distributed?
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Not applicable | Not applicable | Not applicable |
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Regular Temporal Grain?
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Not applicable | Not applicable | Not applicable |
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Temporal Grain Size Value
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Not applicable | Not applicable | Not applicable |
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Temporal Grain Size Units
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Not applicable | Not applicable | Not applicable |
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Temporal Density
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Not applicable | Not applicable | Not applicable |
Variable Values
Farm (y/n) ?Comment:Indexed by o. During the flowering season of 2001, bee visits were recorded at 12 watermelon sites and 11 sunflower sites. In 2002, bee visits were recorded at six additional sunflower sites. |
Land cover types ?Comment:Each indexed by j, Land cover type is a class driver variable determining Suitability for nesting type, Suitability for foraging, and proportion and distance variables. |
Pollinator species ?Comment:Indexed by s, Pollinator species is a class variable that determinines values for the variables; Nesting suitability of nesting types, Relative abundance of pollinator species in landscape, Crops pollinator species requirement, Expected pollinator species foraging distance, and Weight describing importance of floral season. |
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| Not applicable | Not applicable | Not applicable | |
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Min Value
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Not applicable | Not applicable | Not applicable |
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Max Value
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Not applicable | Not applicable | Not applicable |
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Other Value Type
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Not applicable | Not applicable | Not applicable |
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Other Value
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Not applicable | Not reported | Not applicable |
Variable Variability and Sensitivity
Farm (y/n) ?Comment:Indexed by o. During the flowering season of 2001, bee visits were recorded at 12 watermelon sites and 11 sunflower sites. In 2002, bee visits were recorded at six additional sunflower sites. |
Land cover types ?Comment:Each indexed by j, Land cover type is a class driver variable determining Suitability for nesting type, Suitability for foraging, and proportion and distance variables. |
Pollinator species ?Comment:Indexed by s, Pollinator species is a class variable that determinines values for the variables; Nesting suitability of nesting types, Relative abundance of pollinator species in landscape, Crops pollinator species requirement, Expected pollinator species foraging distance, and Weight describing importance of floral season. |
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Variability Expression Given?
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Not applicable | Not applicable | Not applicable |
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Variability Metric
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None | None | None |
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Variability Value
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None | None | None |
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Variability Units
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None | None | None |
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Resampling Used?
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Not applicable | Not applicable | Not applicable |
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Variability Expression Used in Modeling?
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Not applicable | Not applicable | Not applicable |
Variable Operational Validation (Response Variables only)
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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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