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# Angela C Burnett Shawn P Serbin Julien Lamour Jeremiah Anderson
# Kenneth J Davidson Dedi Yang Alistair Rogers. 2020.
# Seasonal measurements of photosynthesis and leaf traits
# in scarlet oak
#
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Data Descriptions:
USDA Species Codes Species Name
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QUCO2 Quercus coccinea
Leaf Trait Units
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LMA (leaf mass per unit area) grams per m2
RWC (relative water content) Percent
Nmass (elemental N, mass basis) mg N per g leaf mass
Narea (elemental N, area basis) g N per m2 leaf area
Spectral Index Units
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ChlNDI (chlorophyll index) no units
PRI (photochemical reflectance index) no units
GasExchange Units Definition
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Asat micromol CO2 per m2 leaf area per s Light saturated net CO2 assimilation rate at ambient CO2 concentration, per unit leaf area (from first point of A/Ci curve)
gs mol H2O per m2 leaf area per s Stomatal conductance to water vapor (from first point of A/Ci curve)
WUEi umol CO2 per mol H20 Intrinsic water use efficiency of photosynthesis (from first point of A/Ci curve)
CiCa no units Ratio of CO2 inside the leaf to CO2 around the leaf in the leaf cuvette (from first point of A/Ci curve)
Tleaf degrees C Mean leaf temperature during A/Ci curve measurement
VcmaxT micromol CO2 per m2 leaf area per s Maximum carboxylation capacity of Rubisco at Tleaf
JmaxT micromol electrons per m2 leaf area per s Maximum electron transport rate of photosynthesis at Tleaf
Vcmax25 micromol CO2 per m2 leaf area per s Maximum carboxylation capacity of Rubisco normalized to 25 degrees C
Jmax25 micromol electrons per m2 leaf area per s Maximum electron transport rate of photosynthesis normalized to 25 degrees C
NUE micromol CO2 per g N per s Nitrogen use efficiency of photosynthesis (based on Vcmax and leaf mass)
Modelled_A micromol CO2 per m2 leaf area per s Modelled net CO2 assimilation at the top of the canopy
G1 stomatal slope (for the first date, the average of all dates except first and last is used; for all other dates the g1 was calculated for the individual date)
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A/Ci curves were fit according to the parameters defined by Bernacchi et al. (2001. Plant, Cell and Environment. 24, 253-259)
VcmaxT and JmaxT were normalized to give Vcmax25 and Jmax25 using an Arrhenius equation.
Raw gas exchange data include all parameters measured by the LI-6400XT or LI-6800 respectively