Toolik Lake Permanent Vegetation Plots
Walker D.A. and Barry N. 1991. Toolik Lake permanent vegetation plots: site factors, soil physical and chemical properties, plant species cover, photographs, and soil descriptions. Data Report 48, Department of Energy R4D Program, Institute of Arctic and Alpine Research, University of Colorado, Boulder, CO.
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Plot location map //
Preliminary vegetation classification //
Communities and microsites //
Environmental variables //
Environmental information: Abiotic data,
Biotic data //
Soils Characteristics //
Species Composition //
Selected Soil Descriptions //
Plot Photos
Soil Description, Plot SWT-70
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 | | | Classification: | Pergelic Cryochrept, sandy-skeletal, mixed. |
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| Location: | North side of Toolik Lake, east of outlet stream, west of runway. 68°38' N, 149°36' W. |
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| Physiographic position: | Glaciofluvial outwash. |
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| Topography: | Featureless ground. |
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| Microrelief Height: | 10 cm. |
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| Drainage: | Moderately well drained. |
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| Vegetation: | Dry Betula nana s.l., Hierochloe alpina, Cladonia arbuscula, low-shrub, fruticose-lichen tundra |
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| Parent material: | Itkillik II glaciofluvial outwash. |
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| Sampled by: | D.A. Walker and C. Westberg, August 12, 1989. |
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| Remarks: | Deep active layer in rocky soils. Shrub height 25 - 30 cm. |
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| Weather: | Partly cloudy, light wind. |
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| Horizons: | Colors are for the damp soil. |
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| Oi | 0-2 cm. Birch leaves and moss bases (mostly Dicranum spp. and Aulacomnium turgidum); wavy abrupt boundary. |
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| Oa1 | 2-7 cm. Very dark brown (7.5YR 2/3) highly organic loam; loose structure; dry; wavy abrupt boundary. |
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| Oa2 | 7-11 cm. Dark brown (7.5YR 4/3) gravelly sandy loam; weak medium subangular blocky, breaking to a weak fine granular structure; damp; friable (moist), smooth, sticky, plastic (wet); pH = 3.8; est. 20 percent fine gravel; (Sample T-167). |
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| Bw | 11-21 cm. Strong brown (7.5YR 4/5) very gravelly sandy clay loam; loose single grain structure; damp; gritty (wet); pH = 4.3; est. 75 percent gravel; roots penetrate to 20 cm; wavy abrupt boundary. (Sample T-168). |
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| C | 21-30+ cm. Very dark gray (10YR 3.5/1.5) very gravelly loamy sand; loose single grain structure; damp; gritty (wet); pH = 5.1; est. 80 percent gravel. (Sample T-169). |
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