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: (EM-668)
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EM-668: Nutrient cycling by fish supports relatively more primary production as lake productivity increases
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EM Identity and Description
| EM-668 | |
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Document Author
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Vanni, M.J., Bowling, A.M., Dickman, E.M., Hale, R.S., Higgins, K.A., Horgan, M.J., Knoll, L.B., Renwick, W.H., and R.A. Stein |
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Document Year
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2006 |
Variable General Info
| Excretion rate per size class | P excretion rate (per size class) | Photosynthetically active radiation (PAR) | Primary production rate | Seston C:N | Seston C:P | |
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Variable ID
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15966 | 15967 | 15959 | 15963 | 15965 | 15964 |
| Not reported | Not reported | PAR | Not reported | Not reported | Not reported | |
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Qualitative-Quantitative
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Quantitative (Cardinal Only) | Quantitative (Cardinal Only) | Quantitative (Cardinal Only) | Quantitative (Cardinal Only) | Quantitative (Cardinal Only) | Quantitative (Cardinal Only) |
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Cardinal-Ordinal
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Cardinal | Cardinal | Cardinal | Cardinal | Cardinal | Cardinal |
| μg N/g fish | μg P/g fish | Not reported | mg C/m^2/day | molar | molar |
Variable Typology
| Excretion rate per size class | P excretion rate (per size class) | Photosynthetically active radiation (PAR) | Primary production rate | Seston C:N | Seston C:P | |
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Predictor-Intermediate-Response
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Intermediate (Computed) Variable |
Intermediate (Computed) Variable |
Intermediate (Computed) Variable |
Intermediate (Computed) Variable |
Intermediate (Computed) Variable |
Intermediate (Computed) Variable |
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Predictor Variable Type
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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Response Variable Type
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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Data Source/Type
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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Variable Classification Hierarchy
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5. Ecosystem Attributes and Potential Supply of Ecosystem Goods and Services |
5. Ecosystem Attributes and Potential Supply of Ecosystem Goods and Services |
5. Ecosystem Attributes and Potential Supply of Ecosystem Goods and Services |
5. Ecosystem Attributes and Potential Supply of Ecosystem Goods and Services |
5. Ecosystem Attributes and Potential Supply of Ecosystem Goods and Services |
5. Ecosystem Attributes and Potential Supply of Ecosystem Goods and Services |
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--Biological characteristics, processes or requirements of living ecosystem components |
--Biological characteristics, processes or requirements of living ecosystem components |
--Physical/chemical characteristics of nonliving ecosystem components |
--Biological characteristics, processes or requirements of living ecosystem components |
--Other, multiple, unspecified or unclear |
--Other, multiple, unspecified or unclear |
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----Biological characteristics, processes or requirements of fauna |
----Biological characteristics, processes or requirements of fauna |
----Physical/chemical characteristics of air, meteorology and precipitation |
----Biological characteristics, processes or requirements of flora and fungi |
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------Fish |
------Fish |
------Meteorology data and parameters (including precipitation) |
------Phytoplankton |
Variable Spatial Characteristics
| Excretion rate per size class | P excretion rate (per size class) | Photosynthetically active radiation (PAR) | Primary production rate | Seston C:N | Seston C:P | |
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Spatial Extent Area
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100,000-1,000,000 km^2 | 100,000-1,000,000 km^2 | 100,000-1,000,000 km^2 | 100,000-1,000,000 km^2 | 100,000-1,000,000 km^2 | 100,000-1,000,000 km^2 |
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Spatially Distributed?
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Yes | Yes | Yes | Yes | Yes | Yes |
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Observations Spatially Patterned?
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Yes | Yes | No | Not applicable | Yes | Yes |
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Spatial Grain Type
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Other (specify), for irregular (e.g., stream reach, lake basin) | Other (specify), for irregular (e.g., stream reach, lake basin) | Not applicable | Not applicable | Other (specify), for irregular (e.g., stream reach, lake basin) | Other (specify), for irregular (e.g., stream reach, lake basin) |
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Spatial Grain Size
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lake | lake | Not applicable | Not applicable | lake | lake |
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Spatial Density
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Not applicable | Not applicable | 7 | Not applicable | Not applicable | Not applicable |
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EnviroAtlas URL
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Average Annual Precipitation |
Variable Temporal Characteristics
| Excretion rate per size class | P excretion rate (per size class) | Photosynthetically active radiation (PAR) | Primary production rate | Seston C:N | Seston C:P | |
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Temporal Extent
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2000-2003 | 2000-2003 | 2000-2003 | 2000-2003 | 2000-2003 | 2000-2003 |
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Temporally Distributed?
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Not applicable | No | Yes | Yes | Yes | Yes |
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Regular Temporal Grain?
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Not applicable | No | No | No | No | No |
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Temporal Grain Size Value
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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Temporal Grain Size Units
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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Temporal Density
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Not applicable |
Not applicable ?Comment:per lake |
Not applicable ?Comment:Taken at each lake during each sampling event |
Not applicable ?Comment:per lake sampling event |
Not applicable ?Comment:per lake per sampling event |
Not applicable ?Comment:per lake sampling event. |
Variable Values
| Excretion rate per size class | P excretion rate (per size class) | Photosynthetically active radiation (PAR) | Primary production rate | Seston C:N | Seston C:P | |
| varies by run | varies by run | Not reported | varies by run | varies by run | varies by run | |
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Min Value
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varies by run | varies by run | Not reported | varies by run | varies by run | varies by run |
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Max Value
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varies by run | varies by run | Not reported | varies by run | varies by run | varies by run |
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Other Value Type
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Single Observation or Parameter Value | Single Observation or Parameter Value | Not applicable | Single Observation or Parameter Value | Single Observation or Parameter Value | Single Observation or Parameter Value |
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Other Value
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varies by run | varies by run | Not reported | varies by run | varies by run | varies by run |
Variable Variability and Sensitivity
| Excretion rate per size class | P excretion rate (per size class) | Photosynthetically active radiation (PAR) | Primary production rate | Seston C:N | Seston C:P | |||
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Variability Expression Given?
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No | No | No | No | Yes | Yes | ||
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Variability Metric
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None | None | None | None |
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Variability Value
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None | None | None | None |
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Variability Units
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None | None | None | None |
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Resampling Used?
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Not applicable | Not applicable | Not applicable | 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 | Not applicable | Yes | Yes |
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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