Table 2. Contents and format of ndp073.dat (File 2)



Variable Variable type Variable width Starting column Ending column Units Spreadsheet column Definition and comments
PAP_NO Numeric 6 1 6 A Cited paper number
PARAM Character 7 7 13 B Measured parameter
P_UNIT Character 14 14 27 C Unit for PARAM
GENUS Character 13 28 40 D Plant genus name
SPECIES Character 13 41 53 E Plant species name
DIV1 Character 6 54 59 F Functional division #1
DIV2 Character 7 60 66 G Functional division #2
DIV3 Character 5 67 71 H Functional division #3
DIV4 Character 6 72 77 I Functional division #4
AMB Character 3 78 80 See CO2_UNIT J Ambient CO2 treatment level
ELEV Character 4 81 84 See CO2_UNIT K Elevated CO2 treatment level
CO2_UNIT Character 10 85 94 See text following table L Units for CO2 exposure concentration
TIME Character 5 95 99 Days M Maximum duration of CO2 exposure
POT Character 13 100 112 N Growing method
MTHD Character 4 113 116 O CO2-exposure facility
STOCK Character 9 117 125 P Planting stock
XTRT Character 6 126 131 Q Interacting treatment
LEVEL Character 7 132 138 R Interacting treatment level
QUANT Character 17 139 155 S Quantity and unit associated with LEVEL
SOURCE Character 6 156 161 T Figure, table, or page from which data taken
X_AMB Numeric 8 162 169 See P_UNIT U Mean response of plants grown in ambient CO2
SE_AMB Numeric 8 170 177 See P_UNIT V Standard error of X_AMB
SD_AMB Numeric 8 178 185 See P_UNIT W Standard deviation of responses of plants grown in ambient CO2
CV*_AMB Numeric 7 186 192 % X Coefficient of variation of responses of plants grown in ambient CO2
N_AMB Numeric 5 193 197 Y Sample size of responses of plants grown in ambient CO2
X_ELEV Numeric 9 198 206 See P_UNIT Z Mean response of plants grown in elevated CO2
SE_ELEV Numeric 7 207 213 See P_UNIT AA Standard error of X_ELEV
SD_ELEV Numeric 8 214 221 See P_UNIT AB Standard deviation of responses of plants grown in elevated CO2
CV*_ELEV Numeric 8 222 229 % AC Coefficient of variation of responses of plants grown in elevated CO2
N_ELEV Numeric 6 230 235 AD Sample size of responses of plants grown in elevated CO2
SDC Character 3 236 238 AE Calculated versus reported standard deviation


Where:



For PARAM, the following list defines the possible measured parameters:



plant parts

AGPROD: aboveground productivity (= AGWT + clippings)

AGWT: total aboveground weight

BGWT: total belowground weight

LFWT: total leaf weight

RGR: relative growth rate

ROOTWT: root weight

SHTWT: shoot weight

STWT: stem weight

TILLERS: number of tillers

TOTWT: whole plant weight



leaf area components

INDLA: maximum individual leaf area

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

GR: stomatal resistance of ambient-grown plants measured at ambient CO2 levels (X_AMB) and of elevated-grown plants measured at elevated CO2 levels (X_ELEV)

GR_AC: stomatal resistance of ambient-grown plants measured at elevated CO2 levels (X_AMB) and of elevated-grown plants measured at elevated CO2 levels (X_ELEV)

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

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

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

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

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

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



biochemical constituents

AGN: aboveground N

BGN: belowground N

LFN: leaf N

STEMN: stem total N

TOTN: total N



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).



The only entry for DIV1 (functional division #1) is ANGIO (angiosperms)



Entries for DIV2 (functional division #2) are

GRASS

GRASS_C: typically monotypic crop; generally does not include pasture species

SEDGE



Entries for DIV3 (functional division #3), if known, are

C3

C4

C3/C4: C3/C4 intermediate, as reported by the authors of the cited paper



Entries for DIV4 (functional division #4) are general habitat or location:

ALPINE

BOREAL

GRASS (grassland)

MEAD (meadow)

WETL (wetland)

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



Entries for CO2_UNIT are

Pa (Pascals)

ubar (1 ubar = 0.1 Pa)

ppm

ul/l

cm3/m3

umol/mol

umol/l

ml/l



TIME represents the maximum duration (days) of the CO2 exposure.



For POT (growing method), 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 MTHD (CO2-exposure facility) are

FACE: Free-Air CO2 Enrichment

GC: indoor, controlled environment: growth chambers

GH: sunlit greenhouses and chambers within greenhouses; also includes closed-top chambers in the field, covering ecosystems

OTC: field-based open-top chambers

SACC: screen-aided CO2 control



Entries for STOCK (planting stock codes) are

CLONE: experimental plants started from cuttings (graminoids); published paper refers to specific genotype

ECOSYS: entire ecosystem exposed

MATURE: mature plants exposed

MIXED: typically ecosystems where species are propagated from multiple sources

RAMETS: small plants (with 2 to 3 tillers) propagated from cuttings, rather than grown from seed

SEED: plants started from seeds

SEEDLINGS: young plants grown from seed

TILLERS: equivalent to rhizomes or stolons, depending upon species; that is, more-or-less horizontal stems or culms



Entries for XTRT (codes for interacting treatment, used together with CO2) are

COMP: plant competition

DEFOL: defoliation (clipping by any means)

FERT: soil fertility

FLD: flooding treatment

F+O3: fertility plus ozone

H2O: well-watered versus drought

LIGHT: light treatment

NONE: no additional treatment beyond CO2 enrichment; usually optimal growth conditions

O3: ozone exposure

SALT:

TEMP: temperature treatment

The entries for LEVEL (which qualitatively describes the treatment level) are treatment-dependent; this field is linked with XTRT (which characterizes the treatment type) and QUANT (which quantifies the treatment level).



For XTRT = COMP, FERT+L, NATIVE, NONE, or SALT, LEVEL = . (missing value) (see entry for corresponding paper in comments.dat and comments.wk1 files)



For soil fertility treatment:

CONTROL

HI

LOW

MED

TRT-1

TRT-2

TRT-3

missing (.) when treatment cannot be clearly described (see entry for corresponding paper in comments.dat and comments.wk1 files).



For H2O treatment:

DRT: drought

FLD: flooding

PRECIP: natural levels of precipitation

WW: well-watered



For LIGHT, TEMP, OZONE, and UVB treatments:

CONTROL

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.dat and comments.wk1 file). If QUANT data are not available or inappropriate, a missing value (.) is present.



Possible entry formats for SOURCE (figure, table, or page from which data were extracted) are:

F1a (Fig. 1a)

T1 (Table 1)



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.



SDC indicates whether the tabulated values for standard deviation (used to calculate coefficient of variation) were extracted directly from the cited publications or calculated from reported values for standard error. The tabulated values of SDC are either Y (yes) or N (no).