Colonization and development of stream communities across a 200-year gradient in Glacier Bay National Park, Alaska, U.S.A.
In May 1997, physical and biological variables were studied in 16 streams of different ages and contrasting stages of development following glacial recession in Glacier Bay National Park, southeast Alaska. The number of microcrustacean and macroinvertebrate taxa and juvenile fish abundance and diver...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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2000
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Online Access: | http://dx.doi.org/10.1139/f00-212 http://www.nrcresearchpress.com/doi/pdf/10.1139/f00-212 |
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crcansciencepubl:10.1139/f00-212 2024-06-23T07:52:59+00:00 Colonization and development of stream communities across a 200-year gradient in Glacier Bay National Park, Alaska, U.S.A. Milner, Alexander M Knudsen, E Eric Soiseth, Chad Robertson, Anne L Schell, Don Phillips, Ian T Magnusson, Katrina 2000 http://dx.doi.org/10.1139/f00-212 http://www.nrcresearchpress.com/doi/pdf/10.1139/f00-212 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 57, issue 11, page 2319-2335 ISSN 0706-652X 1205-7533 journal-article 2000 crcansciencepubl https://doi.org/10.1139/f00-212 2024-06-13T04:10:51Z In May 1997, physical and biological variables were studied in 16 streams of different ages and contrasting stages of development following glacial recession in Glacier Bay National Park, southeast Alaska. The number of microcrustacean and macroinvertebrate taxa and juvenile fish abundance and diversity were significantly greater in older streams. Microcrustacean diversity was related to the amount of instream wood and percent pool habitat, while the number of macroinvertebrate taxa was related to bed stability, amount of instream wood, and percent pool habitat. The percent contribution of Ephemeroptera to stream benthic communities increased significantly with stream age and the amount of coarse benthic organic matter. Juvenile Dolly Varden (Salvelinus malma) were dominant in the younger streams, but juvenile coho salmon (Oncorhynchus kisutch) abundance was greater in older streams associated with increased pool habitat. Upstream lakes significantly influenced channel stability, percent Chironomidae, total macroinvertebrate and meiofaunal abundance, and percent fish cover. Stable isotope analyses indicated nitrogen enrichment from marine sources in macroinvertebrates and juvenile fish in older streams with established salmon runs. The findings are encapsulated in a conceptual summary of stream development that proposes stream assemblages to be determined by direct interactions with the terrestrial, marine, and lake ecosystems. Article in Journal/Newspaper glacier Alaska Canadian Science Publishing Glacier Bay Varden ENVELOPE(7.656,7.656,62.534,62.534) Canadian Journal of Fisheries and Aquatic Sciences 57 11 2319 2335 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
In May 1997, physical and biological variables were studied in 16 streams of different ages and contrasting stages of development following glacial recession in Glacier Bay National Park, southeast Alaska. The number of microcrustacean and macroinvertebrate taxa and juvenile fish abundance and diversity were significantly greater in older streams. Microcrustacean diversity was related to the amount of instream wood and percent pool habitat, while the number of macroinvertebrate taxa was related to bed stability, amount of instream wood, and percent pool habitat. The percent contribution of Ephemeroptera to stream benthic communities increased significantly with stream age and the amount of coarse benthic organic matter. Juvenile Dolly Varden (Salvelinus malma) were dominant in the younger streams, but juvenile coho salmon (Oncorhynchus kisutch) abundance was greater in older streams associated with increased pool habitat. Upstream lakes significantly influenced channel stability, percent Chironomidae, total macroinvertebrate and meiofaunal abundance, and percent fish cover. Stable isotope analyses indicated nitrogen enrichment from marine sources in macroinvertebrates and juvenile fish in older streams with established salmon runs. The findings are encapsulated in a conceptual summary of stream development that proposes stream assemblages to be determined by direct interactions with the terrestrial, marine, and lake ecosystems. |
format |
Article in Journal/Newspaper |
author |
Milner, Alexander M Knudsen, E Eric Soiseth, Chad Robertson, Anne L Schell, Don Phillips, Ian T Magnusson, Katrina |
spellingShingle |
Milner, Alexander M Knudsen, E Eric Soiseth, Chad Robertson, Anne L Schell, Don Phillips, Ian T Magnusson, Katrina Colonization and development of stream communities across a 200-year gradient in Glacier Bay National Park, Alaska, U.S.A. |
author_facet |
Milner, Alexander M Knudsen, E Eric Soiseth, Chad Robertson, Anne L Schell, Don Phillips, Ian T Magnusson, Katrina |
author_sort |
Milner, Alexander M |
title |
Colonization and development of stream communities across a 200-year gradient in Glacier Bay National Park, Alaska, U.S.A. |
title_short |
Colonization and development of stream communities across a 200-year gradient in Glacier Bay National Park, Alaska, U.S.A. |
title_full |
Colonization and development of stream communities across a 200-year gradient in Glacier Bay National Park, Alaska, U.S.A. |
title_fullStr |
Colonization and development of stream communities across a 200-year gradient in Glacier Bay National Park, Alaska, U.S.A. |
title_full_unstemmed |
Colonization and development of stream communities across a 200-year gradient in Glacier Bay National Park, Alaska, U.S.A. |
title_sort |
colonization and development of stream communities across a 200-year gradient in glacier bay national park, alaska, u.s.a. |
publisher |
Canadian Science Publishing |
publishDate |
2000 |
url |
http://dx.doi.org/10.1139/f00-212 http://www.nrcresearchpress.com/doi/pdf/10.1139/f00-212 |
long_lat |
ENVELOPE(7.656,7.656,62.534,62.534) |
geographic |
Glacier Bay Varden |
geographic_facet |
Glacier Bay Varden |
genre |
glacier Alaska |
genre_facet |
glacier Alaska |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 57, issue 11, page 2319-2335 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f00-212 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
57 |
container_issue |
11 |
container_start_page |
2319 |
op_container_end_page |
2335 |
_version_ |
1802644455728087040 |