data

Yellowstone Grid data - 1992

CLASS IV. DATA STRUCTURAL DESCRIPTORS

A. Data Set File

Identity: YNPgrid92_data.txt

Size: 17700 entries, 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 1992.

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.

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: Pre-fire 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, PICO4, POTR1, POTR2, POTR3, POTR4: Number of Pinus contorta (PICO) and Populus tremuloides (POTR) seedling of a given age class per m²

ARCOSPR, ARCOSDL, CAGESPR, CAROSPR, CARXSDL, COPASDL, EPANSPR, EPANSDL, LUARSPR, LUARSDL, VASCSP, CIARSPT, CIARSDL: Number of sprouts per m² and/or number of seedlings per m² for 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	0-66.5	5039
EPAN	Percent cover of Epilobium angustifolium	Percent	Floating point	0-57	3308
LUAR	Percent cover of Lupinus argenteus	Percent	Floating point	0-13.5	261.5
ARCO	Percent cover of Arnica cordifolia	Percent	Floating point	0-8.5	128
OFORB	Percent cover of other forbs (except EPAN, ARCO and LUAR)	Percent	Floating point	0-47.5	1341.7
GRASS	Percent cover of graminoids	Percent	Floating point	0-85	4243.5
CAGE	Percent cover of Carex geyeri	Percent	Floating point	0-52.5	1733
CARO	Percent cover of Carex rossiix	Percent	Floating point	0-31	309
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	0-85	2201.5
SHRUB	Percent cover of all shrubs	Percent		0-82.5	1243.6
VASC	Percent cover of Vaccinium scoparium	Percent	Floating point	0-68	903.2
OSHRUB	Percent cover of all other shrubs (except VASC)	Percent	Floating point	0-59.5	340.4
BARE	Percent cover of bare ground	Percent	Floating point	11-98.5	13387
MIN	Percent cover of exposed mineral soil	Percent	Floating point	0-84.5	5393
CHARLIT	Percent cover of charred litter	Percent	Floating point	0-20.5	561
LITTER	Percent cover of unburned litter	Percent	Floating point	0-83.5	8080
LOG	Percent cover of logs	Percent	Floating point	0-51.5	2450
ROOT	Percent cover of roots	Percent	Floating point	0-19.5	188.5
PEBB	Percent cover of pebbles	Percent	Floating point	0-70.5	883.5
COBB	Percent cover of cobbles	Percent	Floating point	0-12.5	193
BOULD	Percent cover of boulders	Percent	Floating point	0-39	128.2
MOSS	Percent cover of moss	Percent	Floating point	0-39	894
WATER	Percent cover of water	Percent	Floating point	0-9	9.5
PINE	Total number of post-fire Pinus contorta seedlings per m²	No. / m²	Floating point	0-20	231
PICO 1	Number of 1st year Pinus contorta per m²	No. / m²	Floating point	0-11	35.5
PICO2	Number of 2nd year Pinus contorta per m m²	No. / m²	Floating point	0-11	48
PICO3	Number of 3rd year Pinus contorta per m²	No. / m²	Floating point	0-5	80.5
PICO4	Number of 4th year Pinus contorta per m²	No. / m²	Floating point	0-5.5	67
POTR1	Number of 1st year Populus tremuloides per m²	No. / m²	Floating point	0-1	1
POTR2	Number of 2nd year Populus tremuloides per m²	No. / m²	Floating point	0-2.5	4
POTR3	Number of 3rd year Populus tremuloides per m²	No. / m²	Floating point	0-1.5	5.5
POTR4	Number of 4th year Populus tremuloides per m²	No. / m²	Floating point	0-18	28.5
ARCOSPR	Number of Arnica cordifolia sprouts per m²	No. / m²	Floating point	0-35	524.5
ARCOSDL	Number of Arnica cordifolia seedlings per m²	No. / m²	Floating point	0-12	23.5
CAGESPR	Number of Carex geyeri sprouts per m²	No. / m²	Floating point	0-123	1666
CAROSPR	Number of Carex rossiix sprouts per m²	No. / m²	Floating point	0-18	185
CARXSDL	Number of Carex spp. seedlings per m²	No. / m²	Floating point	0-7	51
COPASDL	Number of Collinsia parviflora seedlings per m²	No. / m²	Floating point	0-25	52
EPANSPR	Number of Epilobium angustifolium sprouts per m²	No. / m²	Floating point	0-65	3599
EPANSDL	Number of Epilobium angustifolium seedlings per m²	No. / m²	Floating point	0-188	1108.5
LUARSPR	Number of Lupinus argenteus sprouts per m²	No. / m²	Floating point	0-27	314
LUARSDL	Number of Lupinus argenteus seedlings per m²	No. / m²	Floating point	0-35	140.5
VASCSPR	Number of Vaccinium scoparium sprouts per m²	No. / m²	Floating point	0-112	1656
VASCSDL	Number of Vaccinium scoparium seedlings per m²	No. / m²	Floating point		19.5
CIARSPT	Number of Cirsium arvense sprouts per m²	No. / m²	Floating point	0-7.5	13
CIARSDL	Number of Cirsium arvense seedlings per m²	No. / m²	Floating point	0-7.5	9
GADI	Number of Gayophytum diffusum per m²	No. / m²	Floating point	0-3955	14690.5
HIAL	Number of Hieracium albiflorum per m²	No. / m²	Floating point	0-0	0
LETT	Number of Lactuca serriola per m²	No. / m²	Floating point	0-2	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.

Download data.....

Home People Research Publications Abstracts Data Opportunities Teaching Links Photo Album Visitor Info