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16-year trends in elements of lichens at Theodore Roosevelt National Park, ND

Science of the Total Environment

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Abstract

An epiphytic lichen and a soil lichen in two very closely related genera (Parmelia sulcata and Xanthoparmelia chlorochroa, respectively) were sampled 16 years apart at Theodore Roosevelt National Park in North Dakota and measured for their elemental content. Mercury and cadmium decreased approximately 30% over the time period in both species. Sulfur decreased 8% in the epiphytic species, but increased 20% in the soil lichen. Factor analysis revealed that soil elements were higher in the soil lichen, indicating there was some soil contamination in that species. A relationship between iron and titanium was found only in the soil lichen. Sulfur and mercury were highly enriched in both species relative to the soil, which suggests that the atmosphere is a contributing source of these elements. New baseline values were calculated, 22 elements for both species, although it is not recommended that the soil lichen be sampled in the future.

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Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
16-year trends in elements of lichens at Theodore Roosevelt National Park, ND
Series title:
Science of the Total Environment
Volume
263
Issue:
1-3
Year Published:
2000
Language:
English
Contributing office(s):
National Wildlife Health Center
Description:
p. 231-241
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Science of the Total Environment
First page:
231
Last page:
241
Country:
United States
State:
North Dakota
Other Geospatial:
Theodore Roosevelt National Park
Online Only (Y/N):
N
Additional Online Files(Y/N):
N