Alaska Arctic Vegetation Unit P2.1

 

Hierarchy of Geobotanical Vegetation Map Units (Walker DA 2002)

Lush lichen growth on Hall Island, St. Matthews group. Dry tundra. 1985. Photo: D.R. Klein.

Lush lichen growth on Hall Island, St. Matthews group. Dry tundra. 1985. Photo: D.R. Klein.
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The thick mats of fruticose lichens that dominated much of the landscape in the southern portion of St. Matthew Island prior to the introduction of reindeer had been greatly depleted by reindeer grazing when vegetation plots were established there (Station # 2) in early August 1957. Only fragments of fractured lichens and moss remained on the ground surface in the depressions between the dark green willow hummocks.Photo: 1957. D.R. Klein.

The thick mats of fruticose lichens that dominated much of the landscape in the southern portion of St. Matthew Island prior to the introduction of reindeer had been greatly depleted by reindeer grazing when vegetation plots were established there (Station #2) in early August 1957. Only fragments of fractured lichens and moss remained on the ground surface in the depressions between the dark green willow hummocks. Photo: 1957. D.R. Klein.
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This lichen-dominated plant community with scattered hummocks of willow is on Hall Island that was never reached by the reindeer. It serves as a control for assessing the grazing impact of reindeer on similar communities on St. Matthew Island. Photo: D.R. Klein.

This lichen-dominated plant community with scattered hummocks of willow is on Hall Island that was never reached by the reindeer. It serves as a control for assessing the grazing impact of reindeer on similar communities on St. Matthew Island. Photo: D.R. Klein.
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map legend color for unit P2.1P2.1 Dry tundra (St Matthew Island)

Prostrate dwarf-shrub lichen communities (comm. 15) on dry flats, slopes and ridges, with large areas of sedge, prostrate dwarf-shrub tundra (comm. 19). St. Matthew Island, Subzone D.