Bennett, JP/ Wetmore, CM 1997: Chemical element concentrations in four lichens on a transect entering Voyageurs National Park. - Environmental and Experimental Botany37: 173-185. [RLL List # 170 / Rec.# 1787] Keywords: AIR POLLUTION/ ELEMENT ANALYSIS/ MINNESOTA/ VOYAGEURS NATIONAL PARK
Abstract: 8 fig. 5 tab. [Study in Minnesota of element concentrations in Cladina rangiferina, Evernia mesomorpha, Hypogymnia physodes, and Parmelia sulcata. "All 17 elements measured in the four lichens in this study followed curvilinear trends decreasing from International Falls and then increasing towards Voyageurs National Park, with Parmelia having the most quadratic distance regressions, followed by Evernia, Hypogymnia, and Cladina with the fewest."]