University of Minnesota
University of Minnesota
College of Biological Sciences
http://www.cbs.umn.edu/

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BioCON : Biodiversity, Elevated CO2, and N Enrichment - Experiment 141


Photosynthesis (A max, etc.)

Years Available: 1998 - 2013

Principle Investigators

Lee, Tali

View All Experiment and Dataset Methods

ATTRIBUTES

FieldNameDefinitionUnitCode
1yryear
2plotPlot
3RingRing
4CO2 TreatmentCedar Creek CO2 TreatmentCenriched = 564ppm, Camb = ambient Carbon
5Nitrogen TreatmentCedar Creek Nitrogen TreatmentNenrich= 4g NH4NO3 per MeterSquared per year, Namb = Ambient Nitrogen
6CountOfSpeciesCount Of Speciesdimensionless
7measured speciesspecies used in photosynthetic measurement
8measured groupfunctional group of species used in photosynthetic measurement
9photo repReplicate of photosythetic measurement for each plot/species in each campaignnumber
10dateDate of measurement
11timeTime of measurement
12measurement taken at growth [CO2]"atgrowth"=CO2 concentration of measurment equivalent to the ring concentration, "other"=measurement taken at the CO2 concentration of the other "atgrowth"=CO2 concentration of measurment equivalent to the ring concentration, "other"=measurement taken at the CO2 concentration of the other treatment
13PARphotosynthetically active radiation umol/m2/sec relating to light in the 400 to 700 nanometer wavelengthmicomolesPerSquareMeterPerSecond
14E (mmol H2O m-2 s-1)transpiration ratemillimolesPerSquareMeterPerSecond
15Amax area (??mol CO2 m-2 s-1)assimilation rate on a leaf area basis micromolesPerSquareMeterPerSecond
16tleafleaf temperature estimate, ??Ccelsius
17gs (mmol m-2 s-1)stomatal conductance to water vapormillimolesPerSquareMeterPerSecond
18A/gs (mmol CO2/mol H2O)instantaneous water use efficienty (photosynthesis rate/stomatal conductance)millimolesPerMole
19SLA (cm2/g)specific leaf areacentimetersSquaredPerGram
20Amax mass (nmol CO2 g-1 s-1)assimilation rate on a leaf mass basisnanomolesPerGramPerSecond
21portable gas exchange system usedportable gas exchange system used to take measurementCiras=PP Systems Ciras-1, Licor=Licor 6400
 

SAMPLE DATASET

YearPlotRingCO2 TreatmentNitrogen TreatmentCountOfSpeciesmeasured speciesmeasured groupphoto repdatetimemeasurement taken at growth [CO2]PARE (mmol H2O m-2 s-1)Amax area (?mol CO2 m-2 s-1)tleafgs (mmol m-2 s-1)A/gs (mmol CO2/mol H2O)SLA (cm2/g)Amax mass (nmol CO2 g-1 s-1)portable gas exchange system used
199881CenrichNenrich1Schizachyrium scopariumC417/17/19989:32 AMatgrwth21731.96916.829.068.70.24533249.0419.4Ciras-1
199881CenrichNenrich1Schizachyrium scopariumC417/17/19989:35 AMother21811.9699.427.180.40.11677249.0233.6Ciras-1
199881CenrichNenrich1Schizachyrium scopariumC427/21/199810:56 AMatgrwth12712.1512.625.9123.30.10211186.8235.2Ciras-1
199881CenrichNenrich1Schizachyrium scopariumC427/21/199811:00 AMother13412.5817.325.7152.50.04810186.8137.0Ciras-1
199881CenrichNenrich1Schizachyrium scopariumC437/23/19989:43 AMatgrwth18542.16513.628.679.30.17098213.5289.5Ciras-1
199881CenrichNenrich1Schizachyrium scopariumC437/23/19989:46 AMother15651.7819.225.186.20.10675213.5196.5Ciras-1
199881CenrichNenrich1Schizachyrium scopariumC447/24/199812:57 PMatgrwth24001.7414.825.386.00.17242209.7310.9Ciras-1
199881CenrichNenrich1Schizachyrium scopariumC447/24/199812:59 PMother22882.39310.725.8115.90.09261209.7225.1Ciras-1
1998131CenrichNenrich16Achillea millefoliumforb37/30/19983:14 PMatgrwth20961.5995.824.885.00.06855127.174.0Ciras-1
1998131CenrichNenrich16Achillea millefoliumforb37/30/19983:16 PMother21331.462.825.969.90.04055127.136.1Ciras-1
1998131CenrichNenrich16Andropogon gerardiC437/30/19983:12 PMatgrwth14072.324.827.793.30.05104310.8147.9Ciras-1
1998131CenrichNenrich16Andropogon gerardiC437/30/19983:14 PMother14291.9442.927.778.60.03742310.891.4Ciras-1
                     

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BioCON : Biodiversity, Elevated CO2, and N Enrichment : Photosynthesis (A max, etc.)

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