Lichens as indicators of fluoride emission from a phosphorus plant, Long Harbour, Newfoundland, Canada
Fluoride concentrations in the terrestrial lichens Cladina rangiferina (L.) Harm, and Cladina stellaris (Opiz.) Brodo. were correlated inversely with distance from an industrial plant producing elemental phosphorus at Long Harbour, Nfld., in the direction (NE) of the prevailing wind. The fluoride co...
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Canadian Science Publishing
1980
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crcansciencepubl:10.1139/b80-256 2024-04-28T08:28:55+00:00 Lichens as indicators of fluoride emission from a phosphorus plant, Long Harbour, Newfoundland, Canada Roberts, B. A. Thompson, L. K. 1980 http://dx.doi.org/10.1139/b80-256 http://www.nrcresearchpress.com/doi/pdf/10.1139/b80-256 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Botany volume 58, issue 20, page 2218-2228 ISSN 0008-4026 Plant Science journal-article 1980 crcansciencepubl https://doi.org/10.1139/b80-256 2024-04-09T06:56:25Z Fluoride concentrations in the terrestrial lichens Cladina rangiferina (L.) Harm, and Cladina stellaris (Opiz.) Brodo. were correlated inversely with distance from an industrial plant producing elemental phosphorus at Long Harbour, Nfld., in the direction (NE) of the prevailing wind. The fluoride concentrations ranged from 2830 ppm dry weight in a severely damaged area close to the emission source to 15.5 ppm (dry weight) 12 km NE of the industrial plant. Control samples from unpolluted areas had an average fluoride content of 6.4 ppm dry weight. The minimum observed damage symptoms occurred when these lichens had a fluoride content of 25 ppm dry weight. Damage symptoms included discolouration and structure loss. Discolouration effects were not as pronounced as observed on Abies balsamea (L.) Mill, or on Polytrichum commune (Hedw.) but combined with structure loss allowed the degree of damage to be readily identified in the field. Fluoride concentrations in these terrestrial lichens are compared with levels in soil humus, A. balsamea and some terrestrial bryophytes in four damage zones. The lichen tissue had, on average, twice as much fluoride as occurred in soil humus from the same site and about one half the amount of fluoride found in the terrestrial bryophyte P. commune. The effects of fluoride emissions on the epiphytic lichens Hypogymnia physodes (L.) W. Wats, and Alectoria sarmentosa (Ach.) Ach. in this area are also discussed. Article in Journal/Newspaper Newfoundland Canadian Science Publishing Canadian Journal of Botany 58 20 2218 2228 |
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Canadian Science Publishing |
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crcansciencepubl |
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English |
topic |
Plant Science |
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Plant Science Roberts, B. A. Thompson, L. K. Lichens as indicators of fluoride emission from a phosphorus plant, Long Harbour, Newfoundland, Canada |
topic_facet |
Plant Science |
description |
Fluoride concentrations in the terrestrial lichens Cladina rangiferina (L.) Harm, and Cladina stellaris (Opiz.) Brodo. were correlated inversely with distance from an industrial plant producing elemental phosphorus at Long Harbour, Nfld., in the direction (NE) of the prevailing wind. The fluoride concentrations ranged from 2830 ppm dry weight in a severely damaged area close to the emission source to 15.5 ppm (dry weight) 12 km NE of the industrial plant. Control samples from unpolluted areas had an average fluoride content of 6.4 ppm dry weight. The minimum observed damage symptoms occurred when these lichens had a fluoride content of 25 ppm dry weight. Damage symptoms included discolouration and structure loss. Discolouration effects were not as pronounced as observed on Abies balsamea (L.) Mill, or on Polytrichum commune (Hedw.) but combined with structure loss allowed the degree of damage to be readily identified in the field. Fluoride concentrations in these terrestrial lichens are compared with levels in soil humus, A. balsamea and some terrestrial bryophytes in four damage zones. The lichen tissue had, on average, twice as much fluoride as occurred in soil humus from the same site and about one half the amount of fluoride found in the terrestrial bryophyte P. commune. The effects of fluoride emissions on the epiphytic lichens Hypogymnia physodes (L.) W. Wats, and Alectoria sarmentosa (Ach.) Ach. in this area are also discussed. |
format |
Article in Journal/Newspaper |
author |
Roberts, B. A. Thompson, L. K. |
author_facet |
Roberts, B. A. Thompson, L. K. |
author_sort |
Roberts, B. A. |
title |
Lichens as indicators of fluoride emission from a phosphorus plant, Long Harbour, Newfoundland, Canada |
title_short |
Lichens as indicators of fluoride emission from a phosphorus plant, Long Harbour, Newfoundland, Canada |
title_full |
Lichens as indicators of fluoride emission from a phosphorus plant, Long Harbour, Newfoundland, Canada |
title_fullStr |
Lichens as indicators of fluoride emission from a phosphorus plant, Long Harbour, Newfoundland, Canada |
title_full_unstemmed |
Lichens as indicators of fluoride emission from a phosphorus plant, Long Harbour, Newfoundland, Canada |
title_sort |
lichens as indicators of fluoride emission from a phosphorus plant, long harbour, newfoundland, canada |
publisher |
Canadian Science Publishing |
publishDate |
1980 |
url |
http://dx.doi.org/10.1139/b80-256 http://www.nrcresearchpress.com/doi/pdf/10.1139/b80-256 |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Canadian Journal of Botany volume 58, issue 20, page 2218-2228 ISSN 0008-4026 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/b80-256 |
container_title |
Canadian Journal of Botany |
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58 |
container_issue |
20 |
container_start_page |
2218 |
op_container_end_page |
2228 |
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1797587293308977152 |