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:

HI

LOW



For TEMP treatment:

HI

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.