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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Table 1. Preliminary vegetation classification based on habitat and dominant species and sample numbers for each type

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Principal Habitat		Preliminary Community Name	Plots
Dry tundra
	South-facing slopes	Dryas octopetala - Selaginella sibirica	SWT-7, SWT-18, SWT-47*, SWT-60,
	Outwash terraces and till	Arctous alpina - Hierochloe alpina	SWT-5*, SWT-46^, SWT-71,
	Outwash terraces and till	Vaccinium vitis-idaea - Calamagrostis purpurascens	SWT-65*, SWT-69,
	Outwash terraces and till	Betula nana - Cladina arbuscula	SWT-3, SWT-6, SWT-66, SWT-70*,
	Outwash terraces and till	Salix phlebophylla - Vaccinium vitis-idaea	SWT-63,
	Ground squirrel mounds	Poa glauca - Ranunculus pedatifidus	SWT-17, SWT-31, SWT-48*, SWT-76,
	Sorted and nonsorted stripes	Dryas integrifolia - Dicranum sp.	SWT-40*, SWT-44*,
	Frost scars	Luzula arctica - Juncus biglumis	SWT-35*, SWT-64, SWT-74, SWT-80,
Snowbeds
	Upper snowbeds	Empetrum nigrum - Ledum decumbens	SWT-8^, SWT-19,
	Middle snowbeds	Cassiope tetragona - Carex microchaeta	SWT-49*,
	Middle snowbeds	Cassiope tetragona - Geum glaciale	SWT-9, SWT-20, SWT-50^,
	Lower deep snowbeds	Salix rotundifolia - Hylocomium splendens	SWT-51*,
Moist tundra
	Water track margins	Betula nana - Sphagnum rubellum	SWT-36, SWT-75*,
	Minerotrophic slopes	Carex bigelowii - Tomentypnum nitens	SWT-22, SWT-23, SWT-39*, SWT-42^, SWT-43^, SWT-53*, SWT-56*, SWT-77,
	Tussock tundra	Eriophorum vaginatum - Sphagnum rubellum	SWT-25, SWT-26*, SWT-32*, SWT-54*, SWT-73^, SWT-81,
	Lower minerotrophic slopes	Equisetum arvense - Carex bigelowii	SWT-10, SWT-21, SWT-24, SWT-41*, SWT-45*, SWT-52^,
	Fen hummocks	Trichophorum caespitosum - Tomentypnum nitens	SWT-14*, SWT-38*, SWT-58*,
	Stream banks, lake margins	Carex podocarpa - Dodocatheon frigidum	SWT-1, SWT-16, SWT-34*, SWT-62,
	Riparian willows	Salix lanata - Salix alaxensis	SWT-2*, SWT-28, SWT-33, SWT-67,
	Shrubby south-facing slopes	Salix glauca	SWT-59, SWT-61*,
	Stream margins	Salix pulchra - Dodecatheon frigidum	SWT-68*,
Wet tundra
	Fens, deeper water	Carex aquatilis - Eriophorum angustifolium	SWT-12, SWT-13*, SWT-29, SWT-72,
	Fens, shallow water	Carex chordorrhiza - Carex rariflora	SWT-11*, SWT-15, SWT-37*, SWT-55, SWT-57*,
	Water tracks	Salix pulchra - Sphagnum squarrosum	SWT-27*,
	Lake margins	Arctophila fulva - Hippuris vulgaris	SWT-4, SWT-30*,
	Water tracks	Salix pulchra - Sphagnum rubellum	SWT-78, SWT-79*,
* Plots with soil descriptions and soil analysis for most horizons. ^ Plots with soil analysis for most horizons. All other plots have soil analysis for horizon at 10-cm depth (rooting zone).