Overview

Distribution

National Distribution

Canada

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

United States

Origin: Native

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Global Range: AK to CA, west of the Cascades. Known east of the Cascades from only 2 sites (in BC and northern ID) (McCune & Geiser 1997). Jordan (1973) reported a restricted West Coast distribution, from northern CA to Cook Inlet, AK.

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Ecology

Population Biology

Number of Occurrences

Note: For many non-migratory species, occurrences are roughly equivalent to populations.

Estimated Number of Occurrences: > 300

Comments: Abundant in the Cascades of OR and southern WA. Close to 900 kg/ha standing crop in Douglas fir forest in OR (Pike et al. 1972 ). Also fairly common in the coastal forest zone of AK.

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Conservation

Conservation Status

National NatureServe Conservation Status

Canada

Rounded National Status Rank: NNR - Unranked

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: G4 - Apparently Secure

Reasons: This lichen species mostly occurs from Alaska to (northern?) California, west of the Cascades. Locally quite abundant in some areas but moderate threats may exist from forest fragmentation and harvest.

Environmental Specificity: Narrow to moderate.

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Global Short Term Trend: Relatively stable (=10% change)

Global Long Term Trend: Increase of 10-25% to decline of 30%

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Threats

Degree of Threat: Low

Comments: Fragmentation of old-growth is a threat; younger forests had a lower amount of Lobaria oregana (Sillett 1994). Sensitive to air pollution (McCune & Geiser 1997).

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Wikipedia

Lobaria oregana

Lobaria oregana, also known as lettuce lichen and as Oregon lungwort, is a species of foliose lichen occurring in North American old-growth forests, such as the Hoh Rainforest in Washington State. Taking its common name from its lettuce-like appearance, the lichen grows in the tree canopy but falls to the forest floor, where it is consumed by deer, elk, and other animals.[2] The species was first described by American botanist Edward Tuckerman in 1874 as Sticta oregana, and later (1889) transferred to the genus Lobaria by Swiss lichen specialist Johannes Müller Argoviensis.[1] Via cyanobacteria, it fixes nitrogen from the air, which then enters the local ecosystem when eaten or when absorbed by rootlets which the host trees extend from their own bark into the lichen.[3]

References [edit]

  1. ^ a b "Lobaria oregana (Tuck.) Müll. Arg. 1889". MycoBank. International Mycological Association. Retrieved 2001-08-03. 
  2. ^ Bolen, E.G. (1998). Ecology of North America. New York, NY: John Wiley & Sons. p. 346. ISBN 0-471-13156-3. 
  3. ^ Mathews, Daniel (1988). Cascade-Olympic Natural History: a Trailside Reference. Raven Editions. pp. 290–1. ISBN 0-9620782-1-2. 
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