Stable Carbon and Nitrogen Isotopic Analysis of the Plankton Food Web in a Subarctic Lake
Carbon and nitrogen stable isotopes (δ 13 C and δ 15 N) were used to track energy flow and nutrient cycling pathways in the plankton food web of a subarctic Alaskan lake. Results indicated that planktonic primary production was the major energy source fueling the zooplankton community. In spring, δ...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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1994
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crcansciencepubl:10.1139/f94-133 2024-06-23T07:50:26+00:00 Stable Carbon and Nitrogen Isotopic Analysis of the Plankton Food Web in a Subarctic Lake Gu, Binhe Schell, Donald M. Alexander, Vera 1994 http://dx.doi.org/10.1139/f94-133 http://www.nrcresearchpress.com/doi/pdf/10.1139/f94-133 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 51, issue 6, page 1338-1344 ISSN 0706-652X 1205-7533 journal-article 1994 crcansciencepubl https://doi.org/10.1139/f94-133 2024-06-13T04:10:52Z Carbon and nitrogen stable isotopes (δ 13 C and δ 15 N) were used to track energy flow and nutrient cycling pathways in the plankton food web of a subarctic Alaskan lake. Results indicated that planktonic primary production was the major energy source fueling the zooplankton community. In spring, δ 15 N of Daphnia was strongly influenced by atmospheric nitrogen derived from a N 2 -fixing blue-green algal bloom. In winter, δ 13 C evidence suggested that phytoplankton comprised a small fraction (~15%) of particulate organic matter (POM) in the water column, largely due to low primary productivity. The disparity between δ 13 C of POM and Daphnia in winter may result from preferential assimilation of isotopically light algal carbon from POM. Nitrogen isotope values showed that Heterocope, a presumed carnivore, probably relied heavily on POM as a nutrient source. In common with some arctic lakes, the δ 15 N data showed less than three trophic levels in this plankton food web. The energy transfer pathways and trophic levels revealed a simple plankton trophic structure in this subarctic lacustrine system. Article in Journal/Newspaper Arctic Phytoplankton Subarctic Zooplankton Canadian Science Publishing Arctic Canadian Journal of Fisheries and Aquatic Sciences 51 6 1338 1344 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Carbon and nitrogen stable isotopes (δ 13 C and δ 15 N) were used to track energy flow and nutrient cycling pathways in the plankton food web of a subarctic Alaskan lake. Results indicated that planktonic primary production was the major energy source fueling the zooplankton community. In spring, δ 15 N of Daphnia was strongly influenced by atmospheric nitrogen derived from a N 2 -fixing blue-green algal bloom. In winter, δ 13 C evidence suggested that phytoplankton comprised a small fraction (~15%) of particulate organic matter (POM) in the water column, largely due to low primary productivity. The disparity between δ 13 C of POM and Daphnia in winter may result from preferential assimilation of isotopically light algal carbon from POM. Nitrogen isotope values showed that Heterocope, a presumed carnivore, probably relied heavily on POM as a nutrient source. In common with some arctic lakes, the δ 15 N data showed less than three trophic levels in this plankton food web. The energy transfer pathways and trophic levels revealed a simple plankton trophic structure in this subarctic lacustrine system. |
format |
Article in Journal/Newspaper |
author |
Gu, Binhe Schell, Donald M. Alexander, Vera |
spellingShingle |
Gu, Binhe Schell, Donald M. Alexander, Vera Stable Carbon and Nitrogen Isotopic Analysis of the Plankton Food Web in a Subarctic Lake |
author_facet |
Gu, Binhe Schell, Donald M. Alexander, Vera |
author_sort |
Gu, Binhe |
title |
Stable Carbon and Nitrogen Isotopic Analysis of the Plankton Food Web in a Subarctic Lake |
title_short |
Stable Carbon and Nitrogen Isotopic Analysis of the Plankton Food Web in a Subarctic Lake |
title_full |
Stable Carbon and Nitrogen Isotopic Analysis of the Plankton Food Web in a Subarctic Lake |
title_fullStr |
Stable Carbon and Nitrogen Isotopic Analysis of the Plankton Food Web in a Subarctic Lake |
title_full_unstemmed |
Stable Carbon and Nitrogen Isotopic Analysis of the Plankton Food Web in a Subarctic Lake |
title_sort |
stable carbon and nitrogen isotopic analysis of the plankton food web in a subarctic lake |
publisher |
Canadian Science Publishing |
publishDate |
1994 |
url |
http://dx.doi.org/10.1139/f94-133 http://www.nrcresearchpress.com/doi/pdf/10.1139/f94-133 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Phytoplankton Subarctic Zooplankton |
genre_facet |
Arctic Phytoplankton Subarctic Zooplankton |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 51, issue 6, page 1338-1344 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f94-133 |
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Canadian Journal of Fisheries and Aquatic Sciences |
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51 |
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6 |
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1338 |
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1344 |
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1802641328621748224 |