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 - 1991

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CLASS IV. DATA STRUCTURAL DESCRIPTORS

A. Data Set File

Identity: YNPgrid91_data.txt

Size: 16200 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

YEAR: Year sampling took place.  All sampling conducted in July of 1991.

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

TRANSECT: 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.

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

ASPECT: 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.

BURNSEV: 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 Despian 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.       

FORB, EPAN, LUAR, ARCO, OFORB Percent cover of various forb classifications. See table below.

GRASS, CAGE, CARO, CALA, OGRASS : Percent cover of various graminoids classifications. See table below.

SHRUB, VASC, and OSHRUB : Percent cover of various shrub classifications.  See table below.

BARE, MIN, CHARLIT, LITTER, LOG, ROOT, PEBB, COBB, BOULD, MOSS, and WATER: Percent cover of various cover type classifications. See table below.

PINE: Total number of postfire Pinus contorta seedlings per m2.

PICO1, PICO2,, PICO3, POTR1, POTR2, POTR3: Number of Pinus contorta (PICO) and Populus tremuloides (POTR) seedling with a given age class per m2

ARCOSPR, ARCOSDL, CAGESPR, CAROSPR, CARXSDL, COPASDL, EPANSPR, EPANSDL, LUARSPR, LUARSDL, VASCSP: Number of sprouts per m2and/or number of seedlings per m2or various species.  See table below.

GADI, HIAL, LETT: Number of Gayophytum diffusum, Hieracium albiflorum, and Lactuca serriola per m2

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

1-10

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

FORB

Total percent cover of forbs

Percent

Floating point

0-73

4383

EPAN

Percent cover of Epilobium angustifolium

Percent

Floating point

0-58

2391

LUAR

Percent cover of Lupinus argenteus

Percent

Floating point

0-22.5

308.5

ARCO

Percent cover of Arnica cordifolia

Percent

Floating point

0-18

229

OFORB

Percent cover of other forbs (except EPAN, ARCO and LUAR)

Percent

Floating point

0-48

1504

GRASS

Percent cover of graminoids

Percent

Floating point

0-83

3994.5

CAGE

Percent cover of Carex geyeri

Percent

Floating point

0-47.5

1378.5

CARO

Percent cover of Carex rossiix

Percent

Floating point

0-18

191.5

CALA

Percent cover of Calamagrostis spp.

Percent

Floating point

0-0

0

OGRASS

Percent cover of all other graminoids (all but CAGE, CARO, CALA)

Percent

Floating point

0-83

2424.5

SHRUB

Percent cover of all shrubs

Percent

Floating point

0-83.5

1259

VASC

Percent cover of Vaccinium scoparium

Percent

Floating point

0-80

1049

OSHRUB

Percent cover of all other shrubs (except VASC)

Percent

Floating point

0-25

210

BARE

Percent cover of bare ground

Percent

Floating point

0.5-95

13336

MIN

Percent cover of exposed mineral soil

Percent

Floating point

0-95.5

6167

CHARLIT

Percent cover of charred litter

Percent

Floating point

0-19.5

611

LITTER

Percent cover of unburned litter

Percent

Floating point

0-83.5

8083

LOG

Percent cover of logs

Percent

Floating point

0-52

2349

ROOT

Percent cover of roots

Percent

Floating point

0-20

308.5

PEBB

Percent cover of pebbles

Percent

Floating point

0-63

881.5

COBB

Percent cover of cobbles

Percent

Floating point

0-44.5

323

BOULD

Percent cover of boulders

Percent

Floating point

0-12.5

147.5

MOSS

Percent cover of moss

Percent

Floating point

0-35

621.5

WATER

Percent cover of water

Percent

Floating point

0-10.5

11

PINE

Total number of post-fire Pinus contorta seedlings per m2

No. / m2

Floating point

0-29

253

PICO1

Number of 1st year Pinus contorta per m2

No. / m2

Floating point

0-14

58

PICO2

Number of 2nd year Pinus contorta per m2

No. / m2

Floating point

0-18

87

PICO3

Number of 3rd year Pinus contorta per m2

No. / m2

Floating point

0-6

100.5

POTR1

Number of 1st year Populus tremuloides per m2

No. / m2

Floating point

0-.5

1

POTR2

Number of 2nd year Populus tremuloides per m2

No. / m2

Floating point

0-1.5

6.5

POTR3

Number of 3rd year Populus tremuloides per m2

No. / m2

Floating point

0-5

27.5

ARCOSPR

Number of Arnica cordifolia sprouts per m2

No. / m2

Floating point

0-36

587

ARCOSDL

Number of Arnica cordifolia seedlings per m2

No. / m2

Floating point

0-2

7.5

CAGESPR

Number of Carex geyeri sprouts per m2

No. / m2

Floating point

0-101

2195.5

CAROSPR

Number of Carex rossiix sprouts per m2

No. / m2

Floating point

0-22

196.5

CARXSDL

Number of Carex spp. seedlings per m2

No. / m2

Floating point

0-5.5

25

COPASDL

Number of Collinsia parviflora seedlings per m2

No. / m2

Floating point

0-2.5

2.5

EPANSPR

Number of Epilobium angustifolium sprouts per m2

No. / m2

Floating point

0-62

2469.5

EPANSDL

Number of Epilobium angustifolium seedlings per m2

No. / m2

Floating point

0-106

1052.5

LUARSPR

Number of Lupinus argenteus sprouts per m2

No. / m2

Floating point

0-14

161

LUARSDL

Number of Lupinus argenteus seedlings per m2

No. / m2

Floating point

0-44

345

VASCSPR

Number of Vaccinium scoparium sprouts per m2

No. / m2

Floating point

0-137

2941

CIARSPT

Number of Cirsium arvense sprouts per m2

No. / m2

Floating point

0-2

5

CIARSDL

Number of Cirsium arvense seedlings per m2

No. / m2

Floating point

0

0

GADI

Number of Gayophytum diffusum per m2

No. / m2

Floating point

0-122

1633

HIAL

Number of Hieracium albiflorum per m2

No. / m2

Floating point

0-5

8.5

LETT

Number of Lactuca serriola per m2

No. / m2

Floating point

0-2.5

6.5

 

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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