Table 2. Contents and format of ndp072.dat (File 2)

Variable Variable type Variable width Starting column Ending column Units Spreadsheet column Definition and comments

OBSNO Numeric 3 1 3 A Observation number

PAP_NO Numeric 4 4 7 See below B Cited paper numbers

PARAM Character 6 8 13 See below C Measured parameter

P_UNIT Character 15 14 28 D Unit for PARAM

GENUS Character 13 29 41 E Plant genus name

SPECIES Character 25 42 66 F Plant species name

DIV1 Character 5 67 71 See below G Functional division #1

DIV2 Character 5 72 76 See below H Functional division #2

AMB Character 4 77 80 See CO2_UNIT I Ambient CO₂ treatment level

ELEV Character 4 81 84 See CO2_UNIT J Elevated CO₂ treatment level

CO2_UNIT Character 8 85 92 See below K Units for CO₂ exposure concentration

TIME Numeric 4 93 96 Days L Maximum duration of CO₂ exposure

POT Character 6 97 102 See below M Growing method

METHOD Character 4 103 106 See below N CO₂-exposure facility

STOCK Character 8 107 114 See below O Planting stock

XTRT Character 6 115 120 See below P Interacting treatment

LEVEL Character 7 121 127 See below Q Interacting treatment level

QUANT Character 24 128 151 See below R Quantity and unit associated with LEVEL

SOURCE Character 6 152 157 See below S Figure, table, or page from which data were taken

X_AMB Numeric 10 158 167 See P_UNIT T Mean response of plants grown in ambient CO₂

SE_AMB Numeric 9 168 176 See P_UNIT U Standard error of X_AMB

SD_AMB Numeric 10 177 186 See P_UNIT V Standard deviation of responses of plants grown in ambient CO₂

CV*_AMB Numeric 9 187 195 % W Coefficient of variation of responses of plants grown in ambient CO₂

N_AMB Numeric 3 196 198 X Sample size of responses of plants grown in ambient CO₂

X_ELEV Numeric 10 199 208 See P_UNIT Y Mean response of plants grown in elevated CO₂

SE_ELEV Numeric 9 209 217 See P_UNIT Z Standard error of X_ELEV

SD_ELEV Numeric 10 218 227 See P_UNIT AA Standard deviation of responses of plants grown in elevated CO₂

CV*_ELEV Numeric 9 228 236 % AB Coefficient of variation of responses of plants grown in elevated CO₂

N_ELEV Numeric 3 237 239 AC Sample size of responses of plants grown in elevated CO₂

Where:

For PAP_NO, a value < 2000 indicates abstracts in Strain and Cure (1994), and a value >2000 indicates more recent literature.

For PARAM, the following define the possible measured parameters:

plant parts

AGWT: total aboveground weight

BD: basal diameter

BGWT: total belowground weight

CRWT: coarse root weight

FRWT: fine root weight

HT: height

LFWT: total leaf weight

RGR: relative growth rate

SEEDWT: reproductive biomass

STWT: stem weight

TOTWT: whole plant weight

leaf area components

INDLA: maximum individual leaf area

LAR: leaf area ratio (leaf area/unit mass of plant)

MAXLA: maximum canopy leaf area

SLA: specific leaf area (leaf area/unit mass of leaf)

SLW: specific leaf weight (leaf mass/unit area of leaf)

gas-exchange parameters

GS: stomatal conductance of ambient plants measured under ambient CO₂ (X_AMB) and elevated plants measured under elevated CO₂ levels (X_ELEV)

GS_AC: stomatal conductance of ambient plants measured at elevated CO₂ (X_AMB) and elevated plants measured at elevated CO₂ levels (X_ELEV)

JMAX: maximum rate of electron transport

PIRC: rate of phosphate regeneration

PN: net CO₂ assimilation of ambient plants measured under ambient CO₂ (X_AMB) and elevated plants measured under elevated CO₂ levels (X_ELEV)

PN_AC: net CO₂ assimilation of ambient plants measured at elevated CO₂ (X_AMB) and elevated plants measured at elevated CO₂ levels (X_ELEV)

RD: dark respiration of ambient plants measured under ambient CO₂ (X_AMB) and elevated plants measured under elevated CO₂ levels (X_ELEV)

RD_AC: dark respiration of ambient plants measured at elevated CO₂ (X_AMB) and elevated plants measured at elevated CO₂ levels (X_ELEV)

VCMAX: maximum carboxylation rate of Rubisco

WUE: water use efficiency of ambient plants measured under ambient CO₂ (X_AMB) and elevated plants measured under elevated CO₂ levels (X_ELEV)

WUE_AC: water use efficiency of ambient plants measured at elevated CO₂ (X_AMB) and elevated plants measured at elevated CO₂ levels (X_ELEV)

biochemical constituents

LFC: leaf total C (unit mass basis)

LFNA: leaf N (unit area basis)

LFNM: leaf N (unit mass basis)

LFTNC: leaf total non-structural carbohydrate

LFP: leaf P (unit mass basis)

LFSTAR: leaf starch (unit mass basis)

LFSUG: leaf sugar (unit mass basis)

TOTN: total N (concentration)

The value of PARAM is linked to that shown for P_UNIT (parameter units), X_AMB (parameter value for plants grown under ambient CO₂ exposure conditions), and X_ELEV (parameter value for plants grown under elevated CO₂ exposure conditions).

All entries for DIV1 are "WOODY" in this database.

Entries for DIV2 are:

ANGIO: angiosperms

GYMNO: gymnosperms

N2FIX: nitrogen fixation by species in experiment

The values of AMB and ELEV are linked to that shown for CO2_UNIT.

Entries for CO2_UNIT are:

Pa (Pascals)

ubar (1 bar = 0.1 Pa)

ppm

ul/l

cm³/m³

umol/mol

For POT, a numeric entry signifies pot size (in liters) used during the major part of the experiment; the other entries are:

GRND: plants rooted in the ground

HYDRO: solution or aeroponic culture

Entries for METHOD are:

BRANCH: branch chambers

GC: indoor, controlled environment: growth chambers

GH: sunlit greenhouses and chambers within greenhouses

OTC: field-based open-top chambers

SPAR: high-tech soil-plant-atmosphere chambers

Entries for STOCK are:

BRANCH: branches exposed

MATURE: mature plants exposed

SAP: plants started from cuttings

SEED: plants started from seeds

Entries for XTRT are:

NONE: no treatment

COMP: plant competition

FERT+L: soil fertility and light

FERT: soil fertility

H2O: well-watered vs drought

LIGHT: light treatment

TEMP: temperature treatment

OZONE: ozone exposure

UVB: ultraviolet-B radiation exposure

The entries for LEVEL (which qualitatively describes the treatment level) are treatment-dependent and cannot be further categorized; this field is linked with XTRT (which characterizes the treatment type) and QUANT (which quantifies the treatment level).

For XTRT = NONE, COMP, or FERT+L, LEVEL = . (missing value) (see entry for corresponding paper in comments.* file)

For soil fertility treatment:

FERT - HI

LOW

CONTROL

missing (.) when treatment can not be clearly described (see entry for corresponding paper in comments.* file).

For H2O treatment:

DRT: drought

WW: well-watered

For LIGHT treatment:

LOW

For TEMP treatment:

LOW

CONTROL

For stress interactions:

OZONE (HI, LOW)

UVB (HI, LOW)

Entries for QUANT, which quantify the interacting treatment level, are treatment-dependent. The combination of quantity and unit is reported in this one field (see also the corresponding entry in comments.* file). The missing-value indicator for QUANT is a period (.).

Possible entry formats for SOURCE are:

F1a (Fig. 1a)

T1 (Table 1)

P235 (Page 235 of text)

1emeta (personal communication with authors)

Entries for X_AMB, SE_AMB, SD_AMB, X_ELEV, SE_ELEV, and SD_ELEV are linked to the units given for P_UNIT. The suffix "AMB" refers to measurements of plants grown under ambient CO₂ exposure conditions, and the suffix "ELEV" refers to measurements of plants grown under elevated CO₂ exposure conditions.

For CV*_AMB and CV*_ELEV, corrected (for small sample size) coefficient of variation was calculated according to Sokal and Rohlf (1981) as follows:

CV* = (1 + 1/4N)(SD x 100)/X

where SD = standard deviation, X = mean, and N = sample size.

Variable	Variable type	Variable width	Starting column	Ending column	Units	Spreadsheet column	Definition and comments
OBSNO	Numeric	3	1	3		A	Observation number
PAP_NO	Numeric	4	4	7	See below	B	Cited paper numbers
PARAM	Character	6	8	13	See below	C	Measured parameter
P_UNIT	Character	15	14	28		D	Unit for PARAM
GENUS	Character	13	29	41		E	Plant genus name
SPECIES	Character	25	42	66		F	Plant species name
DIV1	Character	5	67	71	See below	G	Functional division #1
DIV2	Character	5	72	76	See below	H	Functional division #2
AMB	Character	4	77	80	See CO2_UNIT	I	Ambient CO₂ treatment level
ELEV	Character	4	81	84	See CO2_UNIT	J	Elevated CO₂ treatment level
CO2_UNIT	Character	8	85	92	See below	K	Units for CO₂ exposure concentration
TIME	Numeric	4	93	96	Days	L	Maximum duration of CO₂ exposure
POT	Character	6	97	102	See below	M	Growing method
METHOD	Character	4	103	106	See below	N	CO₂-exposure facility
STOCK	Character	8	107	114	See below	O	Planting stock
XTRT	Character	6	115	120	See below	P	Interacting treatment
LEVEL	Character	7	121	127	See below	Q	Interacting treatment level
QUANT	Character	24	128	151	See below	R	Quantity and unit associated with LEVEL
SOURCE	Character	6	152	157	See below	S	Figure, table, or page from which data were taken
X_AMB	Numeric	10	158	167	See P_UNIT	T	Mean response of plants grown in ambient CO₂
SE_AMB	Numeric	9	168	176	See P_UNIT	U	Standard error of X_AMB
SD_AMB	Numeric	10	177	186	See P_UNIT	V	Standard deviation of responses of plants grown in ambient CO₂
CV*_AMB	Numeric	9	187	195	%	W	Coefficient of variation of responses of plants grown in ambient CO₂
N_AMB	Numeric	3	196	198		X	Sample size of responses of plants grown in ambient CO₂
X_ELEV	Numeric	10	199	208	See P_UNIT	Y	Mean response of plants grown in elevated CO₂
SE_ELEV	Numeric	9	209	217	See P_UNIT	Z	Standard error of X_ELEV
SD_ELEV	Numeric	10	218	227	See P_UNIT	AA	Standard deviation of responses of plants grown in elevated CO₂
CV*_ELEV	Numeric	9	228	236	%	AB	Coefficient of variation of responses of plants grown in elevated CO₂
N_ELEV	Numeric	3	237	239		AC	Sample size of responses of plants grown in elevated CO₂