Dataset

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

Leaf net photosynthesis in CO2 x N x water treatment combinations

Years Available: 2007 - 2010

Principle Investigators

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Environmental Data Initiative data package

EDI Package ID	DOI
knb-lter-cdr.613.8	doi:10.6073/pasta/004d9c870e11d4ca03fa1ac9c5fa5e05

ATTRIBUTES

Field	Name	Definition	Unit	Code
1	Date	Date of measurement
2	Time	Time of measurement
3	Ring	BioCON ring
4	Plot	BioCON plot
5	Species	Species used in photosynthetic measurement
6	fxgroup	Functional group of species measured		forb=non-leguminous forb, C3=C-3 grass, legume=leguminous forb, C4=C-4 grass
7	CO2 trt	CO2 Treatment		Cenriched=564ppm, Camb=ambient CO2
8	N trt	Nitrogen treatment		Nenrich=4g NH4NO3 per MeterSquared per year, Namb=Ambient Nitrogen
9	H2O trt	Water treatment		H2Oneg=rain removal treament via portable rain shelters, H2Oamb=natural rain fall
10	CountOfSpecies	Count Of Species planted in plot as assigned by e141 diversity treatment	number
11	rep	Replicate of photosynthetic measurement for each plot/species	number
12	atgrwth	CO2 concentration of measurement		atgrowth=CO2 concentration of measurement equivalent to the ring concentration, other=measurement taken at the CO2 concentration of the other treatment
13	TH2O	Volumetric soil water content (percent) 0-60 mm depth	dimensionless
14	Amax area (??mol CO2 m-2 s-1)	Assimilation rate on a leaf area basis	micromolesPerSquareMeterPerSecond
15	Amax mass (nmol CO2 g-1 s-1)	Assimilation rate on a leaf mass basis	nanomolsPerGramPerSecond
16	gs (mol m-2 s-1)	Stomatal conductance to water vapor	millimolesPerSquareMeterPerSecond
17	A/gs (mmol CO2/mol H2O)	Instantaneous water use efficiency (photosynthesis rate/stomatal conductance)	millimolesPerMole
18	Tleaf (oC)	Leaf temperature estimate, degrees Celsius	celsius
19	Tair (oC)	Air temperature in sample cell (oC)	celsius
20	CO2R (ppm)	Reference CO2 concentration for measurement (ppm)	micromolesPerMole
21	H2OR	Water concentration in reference air	millimolesPerMole
22	Sample cell H2O (mmol H2O mol-1)	Water concentration in sample air	millimolesPerMole
23	RH_S (percent)	Relative humidity of sample air coming off of leaf	dimensionless
24	PAR	Photosynthetically active radiation	micromolesPerSquareMeterPerSecond
25	VpdL (kPa)	Vapor pressure deficit based on leaf temp (kPa)	kilopascal
26	PS lfArea (cm2)	Leaf area used for gas exchange measurement	squareCentimeters
27	PS lfmass (g)	Leaf mass used for gas exchange measurement	gram
28	SLA (cm2/g)	Specific leaf area	cubicCentimetersPerGram
29	Portable gas exchange system used	Portable gas exchange system used		CIRAS1=PP Systems Hitchin UK, Licor 6400=Li-Cor Inc. Lincoln Nebraska
30	H2Oneg trt (cm) cumulative	Mean cummulative amount of rain (for season) received by the reduced water plots	centimeter
31	H2Oamb trt (cm) cumulative	Mean cummulative amount of rain (for season) received by the ambient plots	centimeter
32	3 day H2Oamb (cm)	Mean amount of rain received in prior 3 day period in ambient plots	centimeter
33	7 day H2Oamb (cm)	Mean amount of rain received in prior 7 day period in ambient plots	centimeter
34	percent H2Oneg trt (cumulative)	Mean percent of rain withheld to date within season	centimeter
35	H2Oamb day count	Number of days since rain in ambient plots	dimensionless
36	H2Oneg day count	Number of days since rain in reduced water plots	dimensionless
37	Day count spread	Number of days separating timing of rain events in reduced-water compared to ambient plots	dimensionless

SAMPLE DATASET

Date	Time	Ring	Plot	Species	fxgroup	CO2 trt	N trt	H2O trt	CountOfSpecies	rep	atgrwth	TH2O	Amax area (?mol CO2 m-2 s-1)	Amax mass (nmol CO2 g-1 s-1)	gs (mol m-2 s-1)	A/gs (mmol CO2/mol H2O)	Tleaf (oC)	Tair (oC)	CO2R (ppm)	H2OR	H2OS	RH_S (percent)	PAR	VpdL (kPa)	PS lfArea (cm2)	PS lfmass (g)	SLA (cm2/g)	Portable gas exchange system used	H2Oneg trt (cm) cumulative	H2Oamb trt (cm) cumulative	3 day H2Oamb (cm)	7 day H2Oamb (cm)	percent H2Oneg trt (cumulative)	H2Oamb day count	H2Oneg day count	Day count spread
06/12/07	9:03	4	233	Lupinus perennis	legume	Camb	Namb	H2Oamb	9	1	atgrwth	3	24.4	360.34	0.6313433	38.7	24.1	23.9	403	17.7	24.1	80.1	1176	0.60021477	2.67	0.0181	147.5	CIRAS1	1.7	6	0	0.13	28	9	9	0
06/12/07	9:15	4	233	Bromus inermis	C3	Camb	Namb	H2Oamb	9	1	atgrwth	3.3	21.7	424.36	0.4806162	45.2	23.3	23	396	17.7	20.8	72.4	1330	0.79312934	1.25	0.0064	195.3	CIRAS1	1.7	6	0	0.13	28	9	9	0
06/12/07	9:22	4	243	Bromus inermis	C3	Camb	Namb	H2Oneg	9	1	atgrwth	3.8	10.9	197.04	0.08227384	132.3	23.7	22.6	388	17.4	19.2	65.4	1248	1.01495757	6.12	0.0338	181.1	CIRAS1	1.7	6	0	0.13	28	9	9	0
06/12/07	9:25	4	186	Lupinus perennis	legume	Camb	Nenrich	H2Oamb	9	1	atgrwth	3.9	18	361.19	0.5039708	35.7	22.7	22.2	397	18.8	22.3	80.3	1271	0.5480064	1.95	0.0097	201	CIRAS1	1.7	6	0	0.13	28	9	9	0
06/12/07	9:30	4	186	Andropogon gerardi	C4	Camb	Nenrich	H2Oamb	9	1	atgrwth	2.9	31.2	608.27	0.149408	208.9	27.5	26.8	415	17.8	21.9	59.5	1289	1.49185069	5.3	0.0272	194.9	CIRAS1	1.7	6	0	0.13	28	9	9	0
06/12/07	9:30	4	186	Bromus inermis	C3	Camb	Nenrich	H2Oamb	9	1	atgrwth	3.8	14.5	249.53	0.2897736	50	23	22.3	383	19.1	20.1	71.1	1370	0.81723352	0.62	0.0036	172.2	CIRAS1	1.7	6	0	0.13	28	9	9	0
06/12/07	9:35	4	194	Bromus inermis	C3	Camb	Nenrich	H2Oamb	9	1	atgrwth	3.9	16.4	422.29	0.349177	47	22.7	22	386	20.8	21.8	78.5	1293	0.59792206	0.72	0.0028	257.1	CIRAS1	1.7	6	0	0.13	28	9	9	0
06/12/07	9:50	4	243	Lupinus perennis	legume	Camb	Namb	H2Oneg	9	1	atgrwth	4.2	36.1	466.76	0.6767963	53.3	23.3	22.8	396	19.9	23.4	81.4	1429	0.5329841	1.54	0.0119	129.4	CIRAS1	1.7	6	0	0.13	28	9	9	0
06/12/07	10:05	1	11	Lupinus perennis	legume	Cenrich	Nenrich	H2Oamb	9	1	atgrwth	3.5	4.1	73.78	0.2345956	17.4	24.4	23.4	595	22.5	24.2	79	1345	0.64224559	1.66	0.0092	180.4	CIRAS1	1.7	6	0	0.13	28	9	9	0
06/12/07	10:10	1	21	Bromus inermis	C3	Cenrich	Nenrich	H2Oamb	9	1	atgrwth	3.9	15.3	256.25	0.2009628	76	23	21.9	591	20.3	21.2	75.3	1414	0.69521892	0.94	0.0056	167.9	CIRAS1	1.7	6	0	0.13	28	9	9	0
06/12/07	10:18	1	17	Andropogon gerardi	C4	Cenrich	Namb	H2Oneg	9	1	atgrwth	3.4	18.3	323.76	0.1071907	170.6	29	28.4	609	17.8	21.2	52.8	1130	1.89484933	4.78	0.027	177	CIRAS1	1.7	6	0	0.13	28	9	9	0
06/12/07	10:25	1	21	Andropogon gerardi	C4	Cenrich	Nenrich	H2Oamb	9	1	atgrwth	2.7	22.2	384.87	0.08447776	263.3	26	25.2	592	19.2	20.9	61.8	1107	1.29120679	4.43	0.0256	173	CIRAS1	1.7	6	0	0.13	28	9	9	0

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