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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