Ancillary Data Inventory

In addition to data on root traits, we collected the ancillary data available from each data source. In FRED 1.0, these ancillary data fall under nine general categories: study location, climate, and soils, plant taxonomy, plant growth form and habit, plant growing conditions, and stand and vegetation characteristics, as well as standardized metadata on the study (e.g., data source references and Digital Object Identifiers (DOIs) for both data source and data set when available) and standardized metadata on the classification and sampling of roots. In total, there are 252 types of ancillary data available in FRED 1.0.

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CategoryTypeAncillary DataDescriptionSpecies ObservationsCommunity ObservationsTotal Observations
ClimateBiomeClimate_PFT_Biome equivalent_PoulterWhether the data collection location is tropical, arid, temperate, boreal, or polar, based on K?ppen-Geiger designation and Table 3 from the following paper: Poulter B, Ciais P, Hodson E., Lischke H., Maignan F., Plummer S, Zimmermann N.E. 2011. Plant functional type mapping for earth system models. Geoscientific Model Development 4: 993-1010. DOI: 10.5194/gmd-4-993-2011.164251066327088
ClimateClimateClimateClimate category of sample collection location as described in original data source.300516204625
ClimateClimate designationClimate_Koeppen-Geiger classificationThree-letter K?ppen-Geiger climate designation, according to the 1976-2000 data available from Rubel, F., and M. Kottek, 2010:ÿObserved and projected climate shifts 1901-2100 depicted by world maps of the K?ppen-Geiger climate classification.ÿMeteorol. Z.,ÿ19, 135-141.ÿDOI: 10.1127/0941-2948/2010/0430.164251066327088
ClimateElevationElevationElevation of data collection location.442432337657
ClimatePrecipitationMean annual precipitation (MAP)Mean annual precipitation of sample collection location.10048822118269
ClimateTemperatureAir temperature_Coldest monthMean monthly air temperature for coldest month of year at collection location.312814684596
ClimateTemperatureAir temperature_Warmest monthMean monthly air temperature for warmest month of year at collection location.312814734601
ClimateTemperatureMean annual air temperature (MAT)Mean annual air temperature of collection location.5307570311010
ClimateTopographySlopeSlope of data collection location.5354931028
ClimateWaterSoil water_Water table depthDepth of water table below soil surface at sampling time.272131403
Growth form and habitLeaf characteristicsGrowth form_Leaf compoundnessWhether plant leaves are simple or compound, according to the categorical traits data package from the TRY database: Kattge, J., B?nisch, G., Gnther, A., Wright, I., Zanne, A., Wirth, C., Reich, P.B. and the TRY Consortium (2012) TRY - Categorical Traits Dataset. Data from: TRY - a global database of plant traits. TRY File Archive https://www.try-db.org/TryWeb/Data.php#3146223114653
Growth form and habitLeaf characteristicsGrowth form_Leaf habitWhether plant is deciduous or evergreen. More categories may be added for a later iteration of FRED. Data are now from the categorical traits data package from the TRY database: Kattge, J., B?nisch, G., Gnther, A., Wright, I., Zanne, A., Wirth, C., Reich, P.B. and the TRY Consortium (2012) TRY - Categorical Traits Dataset. Data from: TRY - a global database of plant traits. TRY File Archive https://www.try-db.org/TryWeb/Data.php#31373244014172
Growth form and habitLeaf characteristicsGrowth form_Leaf typePlant leaf type, according to the categorical traits data package from the TRY database: Kattge, J., B?nisch, G., Gnther, A., Wright, I., Zanne, A., Wirth, C., Reich, P.B. and the TRY Consortium (2012) TRY - Categorical Traits Dataset. Data from: TRY - a global database of plant traits. TRY File Archive https://www.try-db.org/TryWeb/Data.php#3161234516168
Growth form and habitLeaf characteristicsGrowth form_Number of leafletsNumber of plant leaflets, according to the categorical traits data package from the TRY database: Kattge, J., B?nisch, G., Gnther, A., Wright, I., Zanne, A., Wirth, C., Reich, P.B. and the TRY Consortium (2012) TRY - Categorical Traits Dataset. Data from: TRY - a global database of plant traits. TRY File Archive https://www.try-db.org/TryWeb/Data.php#36560656
Growth form and habitLeaf characteristicsPlant photosynthetic pathwayPhotosynthesis strategy of plant, according to the categorical traits data package from the TRY database: Kattge, J., B?nisch, G., Gnther, A., Wright, I., Zanne, A., Wirth, C., Reich, P.B. and the TRY Consortium (2012) TRY - Categorical Traits Dataset. Data from: TRY - a global database of plant traits. TRY File Archive https://www.try-db.org/TryWeb/Data.php#315625815633
Growth form and habitPlant characteristicsPlant growth formGrowth form of plant, according to the categorical traits data package from the TRY database: Kattge, J., B?nisch, G., Gnther, A., Wright, I., Zanne, A., Wirth, C., Reich, P.B. and the TRY Consortium (2012) TRY - Categorical Traits Dataset. Data from: TRY - a global database of plant traits. TRY File Archive https://www.try-db.org/TryWeb/Data.php#3If growth form data are not available in TRY categorical traits database, the database from Engemann et al 2016 was used instead when applicable:Engemann K, Sandel B, Boyle BL, Enquist BJ, J?rgensen PM, Kattge J, McGill BJ, Morueta-Holme N, Peet RK, Spencer NJ, Violle C, Wiser SK, Svenning J-C. 2016. A plant growth form dataset for the New World. Ecology. DOI: 10.1002/ecy.15691599358716580
Growth form and habitPlant characteristicsPlant growth form_AquaticWhether plant is aquatic, according to the categorical traits data package from the TRY database: Kattge, J., B?nisch, G., Gnther, A., Wright, I., Zanne, A., Wirth, C., Reich, P.B. and the TRY Consortium (2012) TRY - Categorical Traits Dataset. Data from: TRY - a global database of plant traits. TRY File Archive https://www.try-db.org/TryWeb/Data.php#3000
Growth form and habitPlant characteristicsPlant growth form_ClimberWhether plant is a climber, according to the categorical traits data package from the TRY database: Kattge, J., B?nisch, G., Gnther, A., Wright, I., Zanne, A., Wirth, C., Reich, P.B. and the TRY Consortium (2012) TRY - Categorical Traits Dataset. Data from: TRY - a global database of plant traits. TRY File Archive https://www.try-db.org/TryWeb/Data.php#390090
Growth form and habitPlant characteristicsPlant growth form_CropWhether plant is a crop, according to the categorical traits data package from the TRY database: Kattge, J., B?nisch, G., Gnther, A., Wright, I., Zanne, A., Wirth, C., Reich, P.B. and the TRY Consortium (2012) TRY - Categorical Traits Dataset. Data from: TRY - a global database of plant traits. TRY File Archive https://www.try-db.org/TryWeb/Data.php#34440444
Growth form and habitPlant characteristicsPlant growth form_EpiphyteWhether plant is an epiphyte or a hemiepiphyte, according to the categorical traits data package from the TRY database: Kattge, J., B?nisch, G., Gnther, A., Wright, I., Zanne, A., Wirth, C., Reich, P.B. and the TRY Consortium (2012) TRY - Categorical Traits Dataset. Data from: TRY - a global database of plant traits. TRY File Archive https://www.try-db.org/TryWeb/Data.php#3000
Growth form and habitPlant characteristicsPlant growth form_GraminoidIf the plant has a graminoid growth form, this column denotes whether it is a grass, rush, sedge, or bamboo.70843751
Growth form and habitPlant characteristicsPlant growth form_PalmoidWhether plant is a palmoid, according to the categorical traits data package from the TRY database: Kattge, J., B?nisch, G., Gnther, A., Wright, I., Zanne, A., Wirth, C., Reich, P.B. and the TRY Consortium (2012) TRY - Categorical Traits Dataset. Data from: TRY - a global database of plant traits. TRY File Archive https://www.try-db.org/TryWeb/Data.php#322022
Growth form and habitPlant characteristicsPlant growth form_ParasiticWhether plant is parasitic or hemiparasitic, according to the categorical traits data package from the TRY database: Kattge, J., B?nisch, G., Gnther, A., Wright, I., Zanne, A., Wirth, C., Reich, P.B. and the TRY Consortium (2012) TRY - Categorical Traits Dataset. Data from: TRY - a global database of plant traits. TRY File Archive https://www.try-db.org/TryWeb/Data.php#3909
Growth form and habitPlant characteristicsPlant growth form_SucculentWhether plant is a succulent, stem succulent, or leaf succulent, according to the categorical traits data package from the TRY database: Kattge, J., B?nisch, G., Gnther, A., Wright, I., Zanne, A., Wirth, C., Reich, P.B. and the TRY Consortium (2012) TRY - Categorical Traits Dataset. Data from: TRY - a global database of plant traits. TRY File Archive https://www.try-db.org/TryWeb/Data.php#3505
Growth form and habitPlant characteristicsPlant growth form_WoodinessWhether plant is woody or non-woody, according to the categorical traits data package from the TRY database: Kattge, J., B?nisch, G., Gnther, A., Wright, I., Zanne, A., Wirth, C., Reich, P.B. and the TRY Consortium (2012) TRY - Categorical Traits Dataset. Data from: TRY - a global database of plant traits. TRY File Archive https://www.try-db.org/TryWeb/Data.php#3160077316080
Growth form and habitPlant characteristicsPlant growth form_Woodiness detailWhether plant is woody at base or rootstock, according to the categorical traits data package from the TRY database: Kattge, J., B?nisch, G., Gnther, A., Wright, I., Zanne, A., Wirth, C., Reich, P.B. and the TRY Consortium (2012) TRY - Categorical Traits Dataset. Data from: TRY - a global database of plant traits. TRY File Archive https://www.try-db.org/TryWeb/Data.php#333033
LocationLatitudeLatitudeDecimal degrees latitude of data collection location as reported in the original study.11232430015532
LocationLatitudeLatitude_EstimatedWhen original source does not specify coordinates, latitude estimated using available location description.264360448687
LocationLatitudeLatitude_mainThe single latitude value that best describes the data collection location. This is, in order of priority: a single latitude reported in the original study; the average of a minimum and maximum latitude reported in the original study; or an estimated latitude based on the study location.165151067527190
LocationLatitudeMax_LatitudeMaximum latitude of data collection location when a range of locations is listed in original source.22953542649
LocationLatitudeMin_LatitudeMinimum latitude of data collection location when a range of locations is listed in original source.22953542649
LocationLongitudeLongitudeDecimal degrees longitude of data collection location as reported in the original study.11232428415516
LocationLongitudeLongitude_EstimatedWhen original source does not specify coordinates, longitude estimated using available location description.264460448688
LocationLongitudeLongitude_MainThe single longitude value that best describes the collection location. This is, in order of priority: a single latitude reported in the original study; the average of a minimum and maximum latitude reported in the original study; or an estimated latitude based on the study location.165151067527190
LocationLongitudeMax_LongitudeMaximum longitude of data collection location when a range of locations is listed in original source.22953542649
LocationLongitudeMin_LongitudeMinimum longitude of data collection location when a range of locations is listed in original source.22953542649
LocationNotesNotes_LocationMiscellaneous information about data collection location, given in original data source.11624938521009
Plant growing conditionsGrowing conditionsNotes_In situ or potWhether plant was studied in field or grown under controlled conditions.166181077127389
Plant growing conditionsGrowing conditionsNotes_Indoor or outdoorWhether data were collected indoors or outdoors.166181077127389
Plant growing conditionsGrowing conditionsNotes_Level of artificialityLevel of artificiality, as in the Rhizopolis database. _Low_ = field. _Medium_ = common gardens and outdoor pots. _High_ = growth chambers and indoor pots. _Hydroponic_ = hydroponic.166181077127389
Plant growing conditionsSample timingNotes_Growing season (yes/no)Whether or not samples were collected during the growing season.8616471508
Plant growing conditionsSample timingSample collection_Day beginning collectionThe first day of sample collection for data collected over multiple days.50997606
Plant growing conditionsSample timingSample collection_Day ending collectionThe final day of sample collection for data collected over multiple days.51597612
Plant growing conditionsSample timingSample collection_Measurement dayDay of sample collection.201542046219
Plant growing conditionsSample timingSample collection_Measurement monthMonth of sample collection.5042671411756
Plant growing conditionsSample timingSample collection_Measurement yearYear of sample collection.9007752116528
Plant growing conditionsSample timingSample collection_Month beginning collectionThe first month of sample collection for data collected over multiple months.410812185326
Plant growing conditionsSample timingSample collection_Month ending collectionThe final month of sample collection for data collected over multiple months.401912185237
Plant growing conditionsSample timingSample collection_Year beginning collectionThe first year of sample collection for data collected over multiple years.685217898641
Plant growing conditionsSample timingSample collection_Year ending collectionThe final year of sample collection for data collected over multiple years.680617868592
Plant growing conditionsTreatmentNotes_Treatment extentAmount or extent of treatment applied183711192956
Plant growing conditionsTreatmentNotes_Treatment typesBroad description of the type of experimental manipulation involved. This column differs from F01160 in that the latter is a non-standardized description of the treatment in the original data source, whereas _treatment type_ attempts to group treatments together into standardized types.357118805451
Plant growing conditionsTreatmentNotes_TreatmentsExperimental treatment group of data in row.387419945868
Plant growing conditionsTreatmentNotes_Units for extent of treatmentUnit for value in _extent of treatment_.182511272952
Root sampling metadataClassificationBelowground partPlant parts included in row data. CR = coarse roots (roots with diameter exceeding 2 mm), FR = fine roots (roots with diameter less than 2 mm), R = rhizomes, BS = belowground stems, TR = total root system, and TB = total belowground system. For this column, fine roots are defined as roots less than 2 mm in diameterÿ. _TR_ is used when all plant roots are considered but the source does not specify whether or not coarse roots are present. _TB_ is used when all belowground plant mass is considered but the source does not name all the plant parts comprised therein.166481077127419
Root sampling metadataClassificationMax_Root orderFor an interval covering multiple root orders, the highest order in the interval.16081441752
Root sampling metadataClassificationMin_Root orderFor an interval covering a range of root orders, the lowest order in the interval.16121441756
Root sampling metadataClassificationNotes_Method of determining dead rootsBasis whereupon the authors determined whether roots were living or dead.205918383897
Root sampling metadataClassificationNotes_Root order classification schemeWhether order scheme was centrifugal or centripetal. A centrifugal scheme counts the basal root as first order, with the distal root tip counted as the highest order (coarsest to finest). This is also known as the developmental approach. A centripetal scheme counts the distal tip as the first order, with the basal root counted as the highest order (finest to coarsest). This is also known as the morphometric approach.44963964892
Root sampling metadataClassificationRoot ageAge from appearance of roots.28787374
Root sampling metadataClassificationRoot age_Lower boundMinimum age of roots for which data in row are measured.20020
Root sampling metadataClassificationRoot age_Upper boundMaximum age of roots for which data in row are measured.14014
Root sampling metadataClassificationRoot functional classWhether roots are absorptive (orders 1-3) or transport roots (>3).44223934815
Root sampling metadataClassificationRoot heterorhizy_Fibrous or pioneeringWhether observed roots are fibrous or pioneer (framework) roots.55055
Root sampling metadataClassificationRoot orderRoot branching order, with 1 being either the distal or basal root depending on the classification scheme. Refer to F00059 (Root order classification scheme) for further information regarding the classification of root order.28692513120
Root sampling metadataClassificationRoot vitality_Roots living or deadWhether roots are considered to be alive or dead.10739912119860
Root sampling metadataRooting depthNotes_Rooting depth measurementMeasurement used to determine 50_percent and 95_percent rooting depth (e.g., mass, number, length).4564568
Root sampling metadataRooting depthNotes_Sampled to maximum rooting depth (yes, no)Whether sampling depth exceeds maximum rooting depth.0564564
Root sampling metadataSample collectionChamber_PhotoperiodDaily number of hours of light in growth chamber.28210292
Root sampling metadataSample collectionChamber_Temperature_dayMaximum daytime temperature in controlled growing environment.75422776
Root sampling metadataSample collectionChamber_Temperature_nightMinimum nighttime temperature in controlled growing environment.40511084159
Root sampling metadataSample collectionNotes_Collection methodMethod used to collect data (e.g. minirhizotron, root excavation, sequential coring).13635913622771
Root sampling metadataSample collectionNotes_Minirhizotron depth of fieldDepth of field author used for biomass calculations from minirhizotron images.15040190
Root sampling metadataSample collectionNotes_Miscellaneous notesMiscellaneous information about data in row.8872813117003
Root sampling metadataSample collectionNotes_Root decomposition_Litterbag mesh sizeSize of mesh used for litterbags or in-growth coresÿ.8195351354
Root sampling metadataSample collectionNotes_Root dynamics calculation methodMethod used to calculate root dynamics data, such as production, mortality, or turnover.ÿ269266535
Root sampling metadataSample collectionNotes_Root turnover formulaFormula used to determine turnover.121141262
Root sampling metadataSample collectionNotes_Temperature of respiration chamberTemperature at which reported respiration rate occurs (i.e., temperature of respiration chamber during observation period).172124296
Root sampling metadataSample collectionRoot temperatureTemperature of roots at time of measurement.1720172
Root sampling metadataSample timingExposition period_MainIn-growth duration, production duration, or decomposition duration in days. If exposition period is presented in months, period in days is estimated.13707532123
Root sampling metadataSample timingNotes_Ingrowth duration_dNumber of days between installation and collection of in-growth core or mesh bag.389401790
Root sampling metadataSample timingNotes_Ingrowth duration_moNumber of months between installation and collection of in-growth core or mesh bag.220109329
Root sampling metadataSample timingNotes_Production duration_dNumber of days during which production has been observed.46652
Root sampling metadataSample timingNotes_Production duration_moNumber of months during which production has been observed.0127127
Root sampling metadataSample timingRoot decomposition duration_dNumber of days roots have been decomposing ÿat time of collection.588110698
Root sampling metadataSample timingRoot decomposition duration_moNumber of months roots have been decomposing at time of collection.1270127
Root sampling metadataSampling depthSoil depth_Lower sampling depthThe maximum (deeper) depth at which the measurement is taken if soil depth is presented as a categorical interval.6980941416394
Root sampling metadataSampling depthSoil depth_Sampling depthThe depth at which the measurement is taken.9984183
Root sampling metadataSampling depthSoil depth_Upper sampling depthThe minimum (shallower) depth at which the measurement is taken if soil depth is presented as a categorical interval. A negative number means the authors consider the interval to begin above the soil layer (typically a litter layer or organic layer).6957930516262
SoilsAggregatesSoil aggregate stability in sodium oxalate fractionAggregate in sodium oxalate stability determined by method described in: Strickland TC et al. 1988. Soil Sci. Soc. Am. J. 52: 829-833.02020
SoilsAggregatesSoil aggregate stability in water fractionAggregate stability in water in percent fine particles in aggregate, determined by method described in: Strickland TC et al. 1988. Soil Sci. Soc. Am. J. 52: 829-833.02020
SoilsAggregatesSoil bulk density_Isolated aggregatesBulk density of isolated soil aggregates (clods).02828
SoilsChemistryMax_Soil N_NH4 contentmicrograms of soil NH4+ per gram of soil, extracted by solution or method named in _Soil NH4 extraction method_ column.1496155
SoilsChemistryMin_Soil N_NH4 contentmicrograms of soil NH4+ per gram of soil, extracted by solution or method named in _Soil NH4 extraction method_ column.1496155
SoilsChemistrySoil acid-insoluble (lignin) fractionPercentage of soil that consists of acid-insoluble lignin.505
SoilsChemistrySoil acid-soluble cellulose and hemicellulose fractionPercentage of soil that consists of acid-soluble cellulose and hemicellulose.505
SoilsChemistrySoil Al contentConcentration of aluminum in soil10837323840
SoilsChemistrySoil Al/Ca ratioRatio of aluminum to calcium in soil.10837323840
SoilsChemistrySoil Al_Exchangeable Al3+ massConcentration of exchangeable Al3+ ions in soil.03232
SoilsChemistrySoil Al_Exchangeable chargeMillimoles of charge of exchangeable aluminum per kilogram of soil.6201207
SoilsChemistrySoil Al_saturationProportion of soil adsorption complex saturated with Al cations.0201201
SoilsChemistrySoil base cation saturationProportion of soil adsorption complex saturated with exchangeable cations.225249474
SoilsChemistrySoil base cation saturation_ECECBase cation saturation calculated based on effective cation exchange capacity (CEC).606
SoilsChemistrySoil C contentCarbon content of soil as determined by soil test or elemental analyzer.47243364808
SoilsChemistrySoil C content per ground areaMegagrams of carbon in soil per hectare.038063806
SoilsChemistrySoil C/N ratioCarbon-to-nitrogen ratio of soil.46942354704
SoilsChemistrySoil Ca contentConcentration of calcium in soil.10837373845
SoilsChemistrySoil Ca_Exchangeable Ca2+ massConcentration of exchangeable Ca2+ ions in soil.03232
SoilsChemistrySoil Ca_Exchangeable chargeMillimoles of charge of exchangeable calcium per kilogram of soil.24238262
SoilsChemistrySoil Ca2+ contentConcentration of calcium 2+ ion in soil.0154154
SoilsChemistrySoil cation exchange capacity (CEC)Exchangeable cations that can be absorbed by soil.10524129
SoilsChemistrySoil effective cation exchange capacity (ECEC)The total basic and acidic cations in the soil, extracted with an unbuffered salt.606
SoilsChemistrySoil Fe contentConcentration of iron in soil.037203720
SoilsChemistrySoil Fe_Exchangeable chargeMillimoles of charge of exchangeable iron per kilogram of soil.606
SoilsChemistrySoil K contentPotassium concentration of soil as determined by soil test.29137324023
SoilsChemistrySoil K_Exchangeable chargeMillimoles of charge of exchangeable potassium per kilogram of soil.24220244
SoilsChemistrySoil K_Exchangeable K+ massConcentration of exchangeable K+ ions in soil.03232
SoilsChemistrySoil K_Extractable KConcentration of potassium in soil extractable by method named in _Soil K extraction method_ column.6511
SoilsChemistrySoil Mg contentConcentration of magnesium in soil.10837373845
SoilsChemistrySoil Mg_Exchangeable chargeMillimoles of charge of exchangeable magnesium per kilogram of soil.24220244
SoilsChemistrySoil Mg_Exchangeable Mg2+ massConcentration of exchangeable Mg2+ ions in soil.03232
SoilsChemistrySoil Mg2+ contentConcentration of magnesium 2+ ion in soil.0154154
SoilsChemistrySoil Mn_Exchangeable chargeMillimoles of charge of exchangeable manganese per kilogram of soil.24024
SoilsChemistrySoil N contentNitrogen concentration in soil as determined by soil test.215645356691
SoilsChemistrySoil N content per ground areaMegagrams of nitrogen in soil per hectare.038023802
SoilsChemistrySoil N_Annual available N per ground areaAnnual amount of N available in soil per hectare.262854
SoilsChemistrySoil N_Available N contentConcentration of plant-available nitrogen in soil.5014505
SoilsChemistrySoil N_Daily net soil N mineralization_Lower boundLower net nitrogen mineralization per unit soil mass per day.1496155
SoilsChemistrySoil N_Daily net soil N mineralization_Upper boundUpper net nitrogen mineralization per unit soil mass per day.1496155
SoilsChemistrySoil N_Exchangeable NH4+ massConcentration of exchangeable NH4+ ions in soil.03232
SoilsChemistrySoil N_Exchangeable NO3- massConcentration of exchangeable NO3- ions in soil.03232
SoilsChemistrySoil N_Gross N mineralization rate per ground areaMilligrams of soil nitrogen mineralized per square meter of ground area per day.0138138
SoilsChemistrySoil N_Gross nitrification rate per ground areaMilligrams of soil mass nitrified per square meter of ground area per day.0138138
SoilsChemistrySoil N_Hydrolytic contentConcentration of hydrolytic nitrogen in soil.9615
SoilsChemistrySoil N_Mineral N contentMineral nitrogen concentration in soil.314
SoilsChemistrySoil N_NH4 contentmicrograms of soil NH4+ per gram of soil, extracted by solution or method named in _Soil NH4 extraction method_ column.30030
SoilsChemistrySoil Na_Exchangeable chargeMillimoles of charge of exchangeable sodium per kilogram of soil.24214238
SoilsChemistrySoil Na_Exchangeable Na+ massConcentration of exchangeable Na+ ions in soil.03232
SoilsChemistrySoil nonpolar extractable contentPercentage of soil that consists of fats, oils, and waxes.505
SoilsChemistrySoil organic C contentAmount of organic carbon per kg of soil.380124504
SoilsChemistrySoil organic matter contentPercentage of organic matter in the sampled soil.13625901952
SoilsChemistrySoil P contentPhosphorus concentration in soil as determined by soil test.144341395582
SoilsChemistrySoil P content per ground areaMegagrams of phosphorus in soil per hectare.037863786
SoilsChemistrySoil P_Al and Fe bound inorganic P contentConcentration of soil inorganic P loosely bound to aluminum and iron. See Ushio et al. 2015 (DOI: 10.1111/1365-2435.12424) for further information.022
SoilsChemistrySoil P_Available P contentConcentration of plant-available phosphorus in soil.28124305
SoilsChemistrySoil P_Available P per ground areaKilograms of plant-available phosphorus per hectare soil.808
SoilsChemistrySoil P_Exchangeable PO43- massConcentration of exchangeable PO43- ions in soil.03232
SoilsChemistrySoil P_Inorganic P content_HCl extractionConcentration of soil inorganic P extractable by diluted HCl. See Ushio et al. 2015 (DOI: 10.1111/1365-2435.12424) for further information.033
SoilsChemistrySoil P_Inorganic P content_NaHCO3 extractionConcentration of soil inorganic P extractable by NaHCO3.022
SoilsChemistrySoil P_Occluded inorganic P contentConcentration of occluded inorganic phosphorus in soil.033
SoilsChemistrySoil P_Organic P content_HCl extractionConcentration of soil organic phosphorus extractable by concentrated hot HCl. See Ushio et al. 2015 (DOI: 10.1111/1365-2435.12424) for further information.022
SoilsChemistrySoil P_Organic P content_NaHCO3 extractionConcentration of soil organic P extractable by NaHCO3.033
SoilsChemistrySoil P_Organic P content_NaOH extractionConcentration of organic phosphorus extractable by NaOH. See Ushio et al. 2015 (DOI: 10.1111/1365-2435.12424) for further information.033
SoilsChemistrySoil P_Resin-extractable PResin-extractable soil phosphorus per kg of soil.0201201
SoilsChemistrySoil P_Total extractable contentTotal concentration of soil phosphorus yielded by the extraction method named in _Soil P extraction method_ column.14201215
SoilsChemistrySoil pHMean pH of soil at data collection location.311959279046
SoilsChemistrySoil redox potentialRedox potential of soil.36036
SoilsChemistrySoil water-soluble phenol fractionPercentage of soil that consists of water-soluble phenols.505
SoilsChemistrySoil water-soluble sugar fractionPercentage of soil that consists of water-soluble sugars, as determined by a phenol-sulfuric acid assay.505
SoilsChemistrySoil Zn contentConcentration of zinc in soil.606
SoilsMethodologyNotes_Soil K extraction methodExtractive solution or method used to extract soil K.243458
SoilsMethodologyNotes_Soil NH4 extraction methodExtractive solution or method used to extract soil NH4.303464
SoilsMethodologyNotes_Soil NO3 extraction methodExtractive solution or method used to extract soil NO3.163450
SoilsMethodologyNotes_Soil P extraction methodExtractive solution or method used to extract soil P.0235235
SoilsMethodologyNotes_Soil PO4 extraction methodExtractive solution or method used to extract soil PO4.03434
SoilsMethodologyNotes_Soil solution P concentration for P uptakeMolar concentration of phosphorus in solution used for determining phosphorus uptake.12012
SoilsMethodologyNotes_Soil typeName of soil in sampling area, as described in original data source.6059429010349
SoilsMicrobesRhizosphere soil_Bacterial C contentConcentration of bacterial carbon in rhizosphere soil, estimated based on calculated mean conversion factor of muramic acid to fungal C.15116
SoilsMicrobesRhizosphere soil_Fungal C contentConcentration of fungal organic carbon in rhizosphere soil, estimated based on calculated mean conversion factor of glucosamine to fungal C.15116
SoilsMicrobesRhizosphere soil_Fungal C/bacterial C ratioRatio of rhizosphere soil fungal carbon to rhizosphere soil bacterial carbon.15116
SoilsMicrobesRhizosphere soil_Glucosamine contentConcentration of glucosamine measured in rhizosphere soil.15419
SoilsMicrobesRhizosphere soil_Muramic acid contentConcentration of muramic acid measured in rhizosphere soil.15419
SoilsMicrobesSoil egosterol contentConcentration of ergosterol in soil, measured with HPLC.18321
SoilsMicrobesSoil egosterol content_InitialErgosterol concentration of soil prior to the sowing of the studied plant.15116
SoilsMicrobesSoil ergosterol C/microbial biomass C ratioProportion of soil ergosterol carbon to soil microbial biomass carbon, expressed as a percentage.15116
SoilsMicrobesSoil ergosterol C/microbial biomass C ratio_Initial soilRatio of ergosterol to microbial biomass C in soil prior to the sowing of the studied plant.15419
SoilsMicrobesSoil microbes_Microbial biomass C contentMass of carbon from microbial biomass per gram of soil, measured by fumigation extraction.23427
SoilsMicrobesSoil microbes_Microbial biomass C content_InitialMicrobial biomass carbon concentration, measured by fumigation extraction, prior to the sowing of the studied plant.15116
SoilsMicrobesSoil microbes_Microbial biomass C/N ratioRatio of carbon to nitrogen in microbial biomass measured by fumigation extraction.23124
SoilsMicrobesSoil microbes_Microbial biomass C/N ratio_InitialMicrobial biomass carbon-to-nitrogen ratio, measured by fumigation extraction, prior to the sowing of the studied plant.15116
SoilsMicrobesSoil microbes_Microbial biomass N contentMass of nitrogen from microbial biomass per gram of soil, measured by fumigation extraction.23124
SoilsMicrobesSoil microbes_Microbial biomass N content_InitialMicrobial biomass nitrogen concentration, measured by fumigation extraction, prior to the sowing of the studied plant.15116
SoilsProfileSoil block_HeightHeight/depth of soil blocks if collected.977621039
SoilsProfileSoil block_LengthLength of soil blocks if collected.1036621098
SoilsProfileSoil block_VolumeVolume of soil blocks if collected.945621007
SoilsProfileSoil block_WidthWidth of soil blocks if collected.1036621098
SoilsProfileSoil depthDepth of soil profile.18924213
SoilsProfileSoil horizonSoil horizon from which sample is taken.174385559
SoilsStructureSoil bulk densityM/V where M is the mass of the soil sample under field conditions and V is the volume of the soil sample.106242655327
SoilsTemperatureSoil temperatureMean temperature of soil at data collection site.585343928
SoilsTextureSoil textureTextural class of soil in sampling area.235417124066
SoilsTextureSoil texture_Fraction clayMean percentage of clay (particles less than 0.002 mm) in the sampled soil.8139641777
SoilsTextureSoil texture_Fraction sandMean percentage of sand (particles 0.05-2 mm) in the sampled soil.15036282131
SoilsTextureSoil texture_Fraction siltMean percentage of silt (particles 0.002-0.05 mm) in the sampled soil.15346922226
SoilsWaterSoil water_Available soil water at field capacityPlant-available water in soil at field capacity.66255321
SoilsWaterSoil water_Gravimetric water contentPercentage of soil mass that consists of water at field moisture content.315303618
SoilsWaterSoil water_Matric potentialMatric potential of soil.52052
SoilsWaterSoil water_Potential (SWP)Soil water potential, measured with a tensiometer and/or psychrometer.1010101
SoilsWaterSoil water_Storage capacityWater storage capacity of soil in mm per 120 cm depth. Based on amount of water retained in the soil at matric potentials > -1.5 MPa and < -300 hPa.48048
SoilsWaterSoil water_Volumetric contentPercentage of soil volume that consists of water at field moisture content.435406841
Stand and vegetation characteristicsAboveground biomassAboveground annual C productionMean amount of aboveground plant carbon produced in one year.09898
Stand and vegetation characteristicsAboveground biomassAboveground biomass per ground areaTotal biomass of aboveground plant parts, not including inflorescences, per square meter of ground area.196657853
Stand and vegetation characteristicsAboveground biomassAboveground biomass per plantTotal aboveground mass of an individual plant.808
Stand and vegetation characteristicsAboveground biomassAboveground growth_Annual net primary production per ground areaAboveground plant biomass produced in one year, where NPP is net primary production.131747878
Stand and vegetation characteristicsAboveground biomassStand fertilizer use efficiency (FUE)Amount of nitrogen acquired by the plants per unit nitrogen available.20020
Stand and vegetation characteristicsAgePlant age interval_Lower bound_dThe minimum plant age when plant age is presented as an interval.18018
Stand and vegetation characteristicsAgePlant age interval_Upper bound_dThe maximum plant age when plant age is presented as an interval.18018
Stand and vegetation characteristicsAgePlant age_daysAge of plant in days.1090109
Stand and vegetation characteristicsAgePlant age_yearsAge of plant in years.202
Stand and vegetation characteristicsAgeStand ageTime since establishment of tree stand or plantation.360113544955
Stand and vegetation characteristicsLeaf characteristicsLeaf N retranslocationRate of retranslocation of nitrogen before abscission of leaves.202444
Stand and vegetation characteristicsLeaf characteristicsPhotosynthesis per leaf areaMean net photosynthetic rate at light saturation.404
Stand and vegetation characteristicsPlant characteristicsLeaf area index (LAI)_Fraction of peak LAI of a specific time divided by the maximum LAI observed during the entire observation period.1710171
Stand and vegetation characteristicsPlant characteristicsLeaf area index (LAI)_Per ground areaLeaf area per unit ground area.100146246
Stand and vegetation characteristicsPlant characteristicsLeaf mass per plantTotal mass of individual seedling leaves.4903864989
Stand and vegetation characteristicsPlant characteristicsLeaf weight ratio (LWR, LMR)Leaf weight divided by whole plant weight.1040104
Stand and vegetation characteristicsPlant characteristicsMax_Stand canopy heightMean height of canopy at measurement site.19184203
Stand and vegetation characteristicsPlant characteristicsMin_Stand canopy heightMean height of canopy at measurement site.191837
Stand and vegetation characteristicsPlant characteristicsStand canopy heightMean height of canopy at measurement site.17285842312
Stand and vegetation characteristicsStand diversityVegetation species richnessSpecies richness of vegetation in collection area.0201201
Stand and vegetation characteristicsStem characteristicsBasal area_Stem area per ground areaarea of plant stems per unit ground area.4125911003
Stand and vegetation characteristicsStem characteristicsBasal area_Stem area per species per ground areaArea of plant stems of a specific species per unit ground area.179231410
Stand and vegetation characteristicsStem characteristicsMax_Stem diameter at breast height (DBH)Mean diameter of plant at breast height.203163366
Stand and vegetation characteristicsStem characteristicsMax_Stem diameter at breast height (DBH)Mean diameter of plant at breast height.203153356
Stand and vegetation characteristicsStem characteristicsStand density_Stem number per ground areaProportion of sampling environment occupied by stems of a particular species of tree.3579301287
Stand and vegetation characteristicsStem characteristicsStand density_Stem number per species per ground areaNumber of stems per hectare of a specific species for a given stand of trees.556135691
Stand and vegetation characteristicsStem characteristicsStem diameter at breast height (DBH)Mean diameter of plant at breast height.24116963107
Stand and vegetation characteristicsStem characteristicsStem mass per plantTotal mass of individual seedling stem.75075
Study metadataData attributionAbbreviated article citationAbbreviated citation of contributing data source, e.g. _Doe et al 2015_166481077127419
Study metadataData attributionData set_CitationIf the data are from a dataset other than FRED, long-form citation of contributing dataset.738316289011
Study metadataData attributionData set_DOIIf the data are from a dataset other than FRED, DOI (digital object identifier) of contributing dataset.603014257455
Study metadataData attributionData source_CitationLong-form citation of contributing data source.166481077127419
Study metadataData attributionData source_DOIDOI (digital object identifier) of contributing data source.15007961224619
Study metadataData attributionVersion_FRED version numberVersion number of the specific FRED file being used.166481077127419
Study metadataDuplicate dataData_Duplicate data_x_ denotes that FRED includes both unpublished (or with additional individual replicates corresponding with previously published means) and published versions of data.59059
Study metadataIdentificationNotes_Row IDNumber to designate specific row.166481077127419
Study metadataIdentificationNotes_Site IDIdentifier used in data source to distinguish between multiple data collection sites.212265598681
Study metadataUnpublished dataData_Raw or unpublishedDenotes data in row are raw data (including individual replicates corresponding with previously published means) or unpublished. _Main article_ means raw data are from the primary published work, _supplement_ means data are from a published supplemental document to the article, and _contributed_ means the author directly contributed the data to FRED.565341969849
TaxonomyCommunity mixturesNotes_Mixed community_x_ in this column denotes the data in the row are community-level (i.e., if root samples were taken from a mixed community of species). Blank indicates the data are attributable to a single species.092039203
TaxonomyTaxonomyAccepted genus_CoLGenus of accepted scientific name of plant, according to Catalogue of Life Dynamic Checklist: Roskov Y., Kunze T., Orrell T., Abucay L., Paglinawan L., Culham A., Bailly N., Kirk P., Bourgoin T., Baillargeon G., Decock W., De Wever A., Did_iulis V., eds. (2014). Species 2000 & ITIS Catalogue of Life, 2014 Annual Checklist. Digital resource at www.catalogueoflife.org/annual-checklist/2014. Species 2000: Naturalis, Leiden, the Netherlands. 1664830516953
TaxonomyTaxonomyAccepted genus_TPLGenus of plant according to The Plant List: The Plant Listÿ(2013). Version 1.1. Published on the Internet; http://www.theplantlist.org/000
TaxonomyTaxonomyAccepted species_CoLSpecies epithet of accepted scientific name of plant, according to Catalogue of Life Dynamic Checklist: Roskov Y., Kunze T., Orrell T., Abucay L., Paglinawan L., Culham A., Bailly N., Kirk P., Bourgoin T., Baillargeon G., Decock W., De Wever A., Did_iulis V., eds. (2014). Species 2000 & ITIS Catalogue of Life, 2014 Annual Checklist. Digital resource at www.catalogueoflife.org/annual-checklist/2014. Species 2000: Naturalis, Leiden, the Netherlands. 166472216669
TaxonomyTaxonomyAccepted species_TPLSpecies epithet of plant according to The Plant List: The Plant Listÿ(2013). Version 1.1. Published on the Internet; http://www.theplantlist.org/000
TaxonomyTaxonomyAccepted subspecies_CoLSubspecies epithet of accepted scientific name of plant according to Catalogue of Life Dynamic Checklist: Roskov Y., Kunze T., Orrell T., Abucay L., Paglinawan L., Culham A., Bailly N., Kirk P., Bourgoin T., Baillargeon G., Decock W., De Wever A., Did_iulis V., eds. (2014). Species 2000 & ITIS Catalogue of Life, 2014 Annual Checklist. Digital resource at www.catalogueoflife.org/annual-checklist/2014. Species 2000: Naturalis, Leiden, the Netherlands. 2410241
TaxonomyTaxonomyPlant taxonomy_FamilyFamily of plant according to data source.62481226370
TaxonomyTaxonomyPlant taxonomy_Family_TPLFamily of plant according to The Plant List1653327916812
TaxonomyTaxonomyPlant taxonomy_GenusGenus of plant according to data source.1664830516953
TaxonomyTaxonomyPlant taxonomy_Group_TPLGroup of plant according to The Plant List1653327916812
TaxonomyTaxonomyPlant taxonomy_OrderOrder of plant: Taxonomic classification above Family according to data source.3300330
TaxonomyTaxonomyPlant taxonomy_Order_TPLOrder of plant according to The Plant List1653327916812
TaxonomyTaxonomyPlant taxonomy_SpeciesSpecies epithet of plant according to data source.16648016648
TaxonomyTaxonomyPlant taxonomy_SubspeciesVariety, cultivar, or subspecies of plant according to data source.97097