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USGS · 70180943

Lichens from St. Matthew and St. Paul Islands, Bering Sea, Alaska

Stephen S. Talbot·Sandra Looman Talbot·John W. Thomson·Wilfred B. Schofield
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Abstract

One hundred thirty-nine taxa of lichens including two lichen parasites are reported from St. Matthew and St. Paul Islands in the Bering Sea. Caloplaca lithophila is new to Alaska. Wide-ranging arctic-alpine and boreal species dominate the lichens; a coastal element is moderately represented, while amphi-Beringian species form a minor element. In comparison with St. Paul Island, St. Matthew Island is richer in arctic-alpine species.

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90° N90° S · 180° W ← longitude → 180° E
Source-reported bounding extent: 57.10716482887585° to 60.607193781777255° latitude; -173.07586669921875° to -170.0958251953125° longitude. This indicates report coverage, not an exact sampling location. View area on OpenStreetMap.

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Stephen S. Talbot, Sandra Looman Talbot, John W. Thomson, Wilfred B. Schofield. 2001. Lichens from St. Matthew and St. Paul Islands, Bering Sea, Alaska. https://doi.org/10.1639/0007-2745(2001)104%5B0047%3Alfsmas%5D2.0.co%3B2

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Effects of a coal-fired power plant on the rock lichen Rhizoplaca melanophthalma : chlorophyll degradation and electrolyte leakage

Chlorophyll degradation and electrolyte leakage were measured for the umbilicate desert lichen Rhizoplaca melanophthalma (Ram.) Leuck. & Poelt in the vicinity of a coal-fired power plant near Page, Arizona. Patterns of lichen damage indicated by chlorophyll degradation were similar to those indicated by electrolyte leakage. Regression analyses of chlorophyll degradation as well as electrolyte leakage on distance from the power plant were significant (p < 0.001), suggesting that lichen damage decreased with increasing distance from the power plant. Mean values for both variables at the two sites closest to the power plant (7 and 12 km) differed significantly from values for the two sites farthest from the plant (21 and 42 km; p < 0.001). Mean values within each group (7 and 12 km; 21 and 42 km) do not differ significantly for either parameter. It is suggested that effluents from the power plant combine with local weather factors to produce the observed levels of damage.

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