EFFECTS OF PLACER GOLD MINING ON PRIMARY PRODUCTION IN SUBARCTIC STREAMS OF ALASKA 1
ABSTRACT: Turbidity, total residues, settleable solids, vertical light extinction, and primary production were measured in mined and unmined streams located in the interior highlands of Alaska. Undisturbed streams had low turbidities (< 1 NTU), total residue concentrations averaging 120 mg 1 −1 ,...
Published in: | Journal of the American Water Resources Association |
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crwiley:10.1111/j.1752-1688.1986.tb01864.x 2024-09-15T18:38:02+00:00 EFFECTS OF PLACER GOLD MINING ON PRIMARY PRODUCTION IN SUBARCTIC STREAMS OF ALASKA 1 Van Nieuwenhuyse, Erwin E. LaPerriere, Jacqueline D. 1986 http://dx.doi.org/10.1111/j.1752-1688.1986.tb01864.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1752-1688.1986.tb01864.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1752-1688.1986.tb01864.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor JAWRA Journal of the American Water Resources Association volume 22, issue 1, page 91-99 ISSN 1093-474X 1752-1688 journal-article 1986 crwiley https://doi.org/10.1111/j.1752-1688.1986.tb01864.x 2024-08-30T04:08:45Z ABSTRACT: Turbidity, total residues, settleable solids, vertical light extinction, and primary production were measured in mined and unmined streams located in the interior highlands of Alaska. Undisturbed streams had low turbidities (< 1 NTU), total residue concentrations averaging 120 mg 1 −1 , and undetectable settleable solids. During active mining, turbidity, total residues, and settleable solids levels in a moderately mined stream averaged 170 NTU, 201 mg 1 −1 , and < 0.1 ml 1 −1 , respectively. In a heavily mined stream, turbidity and total residues were two orders of magnitude higher than in unmined streams and settleable solids nearly always exceeded 0.2 ml 1 −1 . Vertical extinction coefficients and turbidity were positively correlated. In undisturbed streams gross primary productivity (g‐O 2 m −2 d −1 ) ranged from 0.20 shortly after spring breakup to a maximum of 1.20 in early fall. Productivity in the moderately mined stream was reduced by 50 percent while photosynthetic efficiency doubled. Primary production was undetectable in a heavily mined stream. Maximum standing crops of periphyton measured as chlorophyll a occurred in fall in an undisturbed stream after 13 weeks of exposure and ranged from 4.5 to 11.8 mg‐chl a m −2 . The highest chlorophyll a densities recorded in the moderately mined stream was 3.8 mg m −2 , and no chlorophyl a was detected in the heavily mined stream. Article in Journal/Newspaper Subarctic Alaska Wiley Online Library Journal of the American Water Resources Association 22 1 91 99 |
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English |
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ABSTRACT: Turbidity, total residues, settleable solids, vertical light extinction, and primary production were measured in mined and unmined streams located in the interior highlands of Alaska. Undisturbed streams had low turbidities (< 1 NTU), total residue concentrations averaging 120 mg 1 −1 , and undetectable settleable solids. During active mining, turbidity, total residues, and settleable solids levels in a moderately mined stream averaged 170 NTU, 201 mg 1 −1 , and < 0.1 ml 1 −1 , respectively. In a heavily mined stream, turbidity and total residues were two orders of magnitude higher than in unmined streams and settleable solids nearly always exceeded 0.2 ml 1 −1 . Vertical extinction coefficients and turbidity were positively correlated. In undisturbed streams gross primary productivity (g‐O 2 m −2 d −1 ) ranged from 0.20 shortly after spring breakup to a maximum of 1.20 in early fall. Productivity in the moderately mined stream was reduced by 50 percent while photosynthetic efficiency doubled. Primary production was undetectable in a heavily mined stream. Maximum standing crops of periphyton measured as chlorophyll a occurred in fall in an undisturbed stream after 13 weeks of exposure and ranged from 4.5 to 11.8 mg‐chl a m −2 . The highest chlorophyll a densities recorded in the moderately mined stream was 3.8 mg m −2 , and no chlorophyl a was detected in the heavily mined stream. |
format |
Article in Journal/Newspaper |
author |
Van Nieuwenhuyse, Erwin E. LaPerriere, Jacqueline D. |
spellingShingle |
Van Nieuwenhuyse, Erwin E. LaPerriere, Jacqueline D. EFFECTS OF PLACER GOLD MINING ON PRIMARY PRODUCTION IN SUBARCTIC STREAMS OF ALASKA 1 |
author_facet |
Van Nieuwenhuyse, Erwin E. LaPerriere, Jacqueline D. |
author_sort |
Van Nieuwenhuyse, Erwin E. |
title |
EFFECTS OF PLACER GOLD MINING ON PRIMARY PRODUCTION IN SUBARCTIC STREAMS OF ALASKA 1 |
title_short |
EFFECTS OF PLACER GOLD MINING ON PRIMARY PRODUCTION IN SUBARCTIC STREAMS OF ALASKA 1 |
title_full |
EFFECTS OF PLACER GOLD MINING ON PRIMARY PRODUCTION IN SUBARCTIC STREAMS OF ALASKA 1 |
title_fullStr |
EFFECTS OF PLACER GOLD MINING ON PRIMARY PRODUCTION IN SUBARCTIC STREAMS OF ALASKA 1 |
title_full_unstemmed |
EFFECTS OF PLACER GOLD MINING ON PRIMARY PRODUCTION IN SUBARCTIC STREAMS OF ALASKA 1 |
title_sort |
effects of placer gold mining on primary production in subarctic streams of alaska 1 |
publisher |
Wiley |
publishDate |
1986 |
url |
http://dx.doi.org/10.1111/j.1752-1688.1986.tb01864.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1752-1688.1986.tb01864.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1752-1688.1986.tb01864.x |
genre |
Subarctic Alaska |
genre_facet |
Subarctic Alaska |
op_source |
JAWRA Journal of the American Water Resources Association volume 22, issue 1, page 91-99 ISSN 1093-474X 1752-1688 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1752-1688.1986.tb01864.x |
container_title |
Journal of the American Water Resources Association |
container_volume |
22 |
container_issue |
1 |
container_start_page |
91 |
op_container_end_page |
99 |
_version_ |
1810482364617326592 |