Dr. Monica G.Turner
Department of Integrative Biology
University of Wisconsin
430 Lincoln Dr.
Madison, WI 53706
Ecosystem and
Landscape Ecology Lab
 

data

Yellowstone Grid data - 1989

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CLASS IV. DATA STRUCTURAL DESCRIPTORS

A. Data Set File

Identity: YNPgrid89_data.txt

Size: 7800 records, not including header row.

Format and storage mode: ASCII text, tab delimited. No compression scheme was used.

Header information: See variable names in Section B.

Alphanumeric attributes: Uppercase

Special characters/fields: Missing data denoted as “.”

Authentication procedures: Column sums, see table below.

B. Variable information

SITE: Name of sampling grid: MLRD=Mallard, MYST=Mystic and HART=Heart

TRANS: Letter identifying transect within sampling grid ranging from letters A through J oriented from west to east.

POINT: Number identifying sampling point within each transect.  Each transect contained sampling points numbered 1 through 10 oriented from south to north.

YEAR: Year sampling took place.  All sampling conducted in July of 1989.

SLOP: Topographic slope (degrees) at each sampling point.

ASP: Topographic aspect of sampling point.  Values can include N, S, E, W, NW, NE, SW, SE or X.  A value of X indicates a virtually flat topography.

BURN: Burn severity classes were defined as follows:

0=unburned, no sign of fire effects;
1=light surface burn. Low-intensity surface fire in which canopy trees retain green needles and generally did not die, although some stems scorched. Soil organic layer still largely intact, though burned in small patches. 
2=severe surface burn. High-intensity surface fire with extensive canopy tree mortality, but needles on canopy trees are not consumed by fire; pre-fire soil organic layer largely consumed, but soil covered by dead leaves fallen from the canopy after the fire.
3=crown fire. Needles of canopy trees completely consumed by fire; soil organic layer almost entirely consumed, and soil is bare with no litter.

SUCC: Prefire successional stage classes (as in Despain 1990) were derived from sampling a chronosequence of stands that originated following fires at various times in the last 400 years. The resulting classes are defined as follows:

LP0 (0-40 yrs) = Recently burned lodgepole pine stands in the grass to seedling/sapling stage before canopy closure; trees usually < 2 m in height.
LP1 (40-150 yrs) = Closed canopy of even-aged, often dense lodgepole pine; young pole stage.
LP2 (150-300 yrs) = Closed canopy dominated by lodgepole pine; overstory still largely intact; understory may contain small conifers, but is generally open and park like.
LP3 (>300 yrs)=Canopy quite irregular, predominantly of old lodgepole pine but containing some Engelman spruce, subalpine fir and whitebark pine in the pole-sized class; understory usually dense.

SF0, SF1, SF2, SF3 are pre-fire successional stages for spruce-fir forest.  Additional categories included SHR=shrub, BOG=bog, and WET=open water.    

BEETL: Pre-fire mountain pine beetle damage within the stand was visually estimated and categorized as follows: none (0%), light (1-10%), moderate (10-50%), or severe (>50%).

MISTL: Pre-fire mistletoe damage within the stand was visually estimated and categorized as follows: none (0%), light (1-10%), moderate (10-50%), or severe (>50%).

PICO, ABLA, PIEN, NUMPIAL: Number of prefire Pinus contorta, Abies lasiocarpa , Picea engelmannii, and Pinus albicaulis (respectively) taller than breast height within 50m² circular plot.

BPICO, BABLA, BPIAL: Number of prefire Pinus contorta, Abies lasiocarpa and Pinus albicaulis (respectively) smaller than breast height within 50m² circular plot.

FORB, GRASS, SHRUB, BARE, MIN: Estimated percent cover of forbs, graminoids, shrubs, litter, and exposed mineral soil respectively. Average of four measurements each within a 1m² circular plot.

NUMPICO1: Number of post-fire Pinus contorta seedlings per meter2

ASH: Depth of ash in mm as distinguished by texture and color. Average of four measurements each within a 1m² circular plot.

CHAR: Depth of charred soil in mm as distinguished by color. Average of 4 measurements each within a 1m² circular plot

Variable Name

Variable definition

Units

Storage Type

Range for Numeric Values

Column sum

OBS

Unique integer code for each observation

N/A

Integer

1-300

N/A

YEAR

Year sampled

N/A

Integer

N/A

N/A

SITE

Name of grid

N/A

Character

N/A

N/A

TRANS

Transect letter label

N/A

Character

N/A

N/A

POINT

Sampling point

N/A

Integer

N/A

N/A

SLOP

Slope

degrees

Integer

 

N/A

ASP

Aspect

N/A

Character

N/A

N/A

BURN

Burn severity class

N/A

Character

N/A

N/A

SUCC

Successional stage classification

N/A

Character

N/A

N/A

BEETL

Percent pre-fire beetle damage

N/A

Integer (categorical)

N/A

355

MISTL

Percent pre-fire mistletoe damage

N/A

Integer (categorical)

N/A

408

PICO

Number prefire Pinus contorta taller than breast height

No. / 50m2

Integer

0-62

2377

BPICO

Number prefire Pinus Contorta smaller than breast height

No. / 50m2

Integer

0-170

2004

ABLA

Number of prefire Abies lasiocarpa taller than breast height

No. / 50m2

Integer

0-28

344

BABLA

Number of prefire Abies lasiocarpa smaller than breast height

No. / 50m2

Integer

0-39

201

PIEN

Number prefire Picea engelmannii taller than breast height

No. / 50m2

Integer

0-13

87

PIAL

Number prefire Pinus albicaulis taller than breast height

No. / 50m2

Integer

0-11

102

BPIAL

Number prefire Pinus albicaulis smaller than breast height

No. / 50m2

Integer

0-14

78

FORB

Percent cover forbs

Percent

Floating point

0-36.25

1150.375

GRASS

Percent cover grasses

Percent

Floating point

0-85

2122.125

SHRUB

Percent cover of shrubs

Percent

Floating point

0-62.5

915.375

BARE

Percent cover bare ground with litter

Percent

Floating point

2.5-100

25415.625

MIN

Percent cover exposed mineral soil

Percent

Floating point

0-100

15085.5

PINE

Number of postfire Pinus contorta seedlings per m2

No. / m2

Floating point

0-9.5

81

ASH

Depth of ash

mm

Floating point

0-19.5

371.75

CHAR

Depth of charred soil

mm

Floating point

0-39.25

2760.4187

 

Publication(s): Turner, M. G., W. H. Romme, and R. H. Gardner.  1999.  Prefire heterogeneity, fire severity and plant reestablishment in subalpine forests of Yellowstone National Park, Wyoming. International Journal of Wildland Fire 9:21-36.

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