Data supporting the Oregon Breeding Bird Atlas
(see data files for a short introduction.)
File: HAB_HEX.TXT
General Description: This summarizes data on land cover types in each hexagon, as represented by two separate sources of statewide land cover digital data previously derived from aerial imagery (TM and AVHRR imagery). One data set (ONHP) was provided by the Oregon Natural Heritage Program (Level 2 Gap Analysis) and includes 61 land cover types wherever they occurred in patches of at least 247 acres. See Methods section of this CD for further description of this data set. The other (AVHRR) data set was provided by the USEPA and USGS, and includes 14 land cover types based generally on their predominance within 1 x 1 km grid units. It also contains some indexes EPA computed to quantify the pattern of the land cover types within the hexagons.
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Although we have made the data from this project accessible to anyone,
all the time the authors spent administering this project, as well as time spent
computerizing, organizing, and documenting the data, was uncompensated.
Moreover, not every limitation of the data has been described.
For these reasons, we request that researchers who wish to publish
statistical analyses of these data please contact us first to discuss
the data and opportunities for joint authorship of resulting publications.
Furthermore, we again thank the Oregon Natural Heritage Program and the
USEPA for sharing with us some of the non-avian data sets.
Contact us at: |
Fields (82, comma-delimited):
HexagonID
ONHP land cover types (area in each type):
32= Sitka Spruce-W. Hemlock Maritime Forest
33= Mountain Hemlock Montane Forest
34= True Fir-Hemlock Montane Forest
37= Shasta Red Fir-Mountain Hemlock Forest
39= Whitebark-Lodgepole Pine Montane Forest
40= Ponderosa Pine-dominant Mixed Conifer Forest
41= Northeast Mixed Conifer Forest
42= Jeffery Pine Forest/Woodland
43= Conifer Woodland on Serpentine Bedrock
44= Lodgepole Pine Forest/Woodland
45= Subalpine Fir-Lodgepole Pine Montane Conifer
46= Coastal Lodgepole Forest
49= Douglas Fir-W. Hemlock-W. Red Cedar Forest
50= Douglas Fir-Port Orford Cedar Forest
51= Douglas Fir-Mixed Deciduous Forest
52= Douglas Fir-White Fir/Tanoak-Madrone Mixed Forest
53= Douglas Fir/White Oak Forest
54= Ponderosa Pine Forest/Woodland
56= Douglas Fir dominant - Mixed Conifer Forest
57= Ponderosa Pine/White Oak Forest & Woodland
58= Ponderosa Pine-W. Juniper Woodland
59= Ponderosa-Lodgepole Pine on Pumice
61= W. Juniper Woodland
6364= Red Alder-Big Leaf Maple Forest
66= Aspen Groves
67= Mixed Conifer/Mixed Deciduous Forest
72= Siskiyou Mtns Mixed Deciduous Forest
75= White Oak Forest
77= South Coast Mixed Forest
85= Siskiyou Mtns Shrubland on Serpentine Bedrock
87= Willow-Hawthorn Shrubland
89= Manzanita-dominant Shrubland
90= Mountain Mahogany Shrubland
91= Sagebrush Steppe
93= Low-Dwarf Sagebrush
95= Salt Desert Scrub Shrubland
96= Big Sagebrush Shrubland
97= Bitterbrush-Big Sagebrush Shrubland
103= Northeast Canyon Grass & Shrubland
105= Subalpine Grassland
106= Grassland & Conifers Interspersed
110= Subalpine Scattered Trees & Shrubs
112= Northeast Modified Grassland
113= Coastal Headland Grass & Shrubland
114= Wet Montane Meadow
121= Recently Cutover/Burnt Forest
122= Seasonally Wet Playa
124= Urban/Residential
125= Cropland/Pasture/Orchard
127= Lava/Pumice
128= Coastal Dunes & Ponds
129= Alpine Rock & Snowfield
130= Open Water
126201= Streamside/Wetland Shrubland
126202= Coastal Salt Marsh & Exposed Tidal Flat
128203= Freshwater Marsh
135200= Streamside Forest
136201= Streamside/Wetland Shrubland
138203= Freshwater Marsh
Number of land cover types (per hexagon)
AVHRR land cover types & computed variables:
Cropland/pasture mixture (proportion)
Grassland/cropland mixture (proportion)
Woodland/cropland mixture (proportion)
Grass dominated (proportion)
Shrub dominated rangeland (proportion)
Mixed (grass/shrub) rangeland (proportion)
Deciduous forest (proportion)
Conifer forest (proportion)
Mixed (deciduous/conifer) forest (proportion)
Water bodies (proportion)
Coastal wetlands (proportion)
Barren or sparsely vegetated (proportion)
Alpine tundra (proportion)
Urban area (proportion)
Number of detailed land cover classes (range 1-160) per hexagon
Number of different patches larger than about 4 sq. km.
Fractal metric based on patches larger than about 4 sq. km.
Dominance metric for hexagon based on patches larger than about 4 sq. km.
Contagion metric for hexagon based on patches larger than about 4 sq. km.
Other:
Cumulative linear distance of roads mapped in each hexagon (EPA calculation)
Cumulative linear distance of streams mapped in each hexagon (EPA calculation)
Elevation (mean) (EPA calculation)
Elevation standard deviation (EPA calculation)