Energy flow in an arctic aquatic ecosystem
Natural isotope abundances to trace major pathways of energy flow to consumers in Imnavait Creek and the tundra ecosystem of the R4D watershed with comparative work in the coastal tundra. Our overall goals are to a determine if carbon is accumulating in upland and coastal tundra; determine the role...
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Alaska Univ., Fairbanks, AK (United States). Inst. of Northern Engineering
1988
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Online Access: | https://doi.org/10.2172/6887503 https://digital.library.unt.edu/ark:/67531/metadc1187024/ |
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ftunivnotexas:info:ark/67531/metadc1187024 2023-05-15T15:00:27+02:00 Energy flow in an arctic aquatic ecosystem Schell, D.M. United States. Department of Energy. 1988-01-01 9 pages Text https://doi.org/10.2172/6887503 https://digital.library.unt.edu/ark:/67531/metadc1187024/ English eng Alaska Univ., Fairbanks, AK (United States). Inst. of Northern Engineering other: DE93010983 rep-no: DOE/ER/60265-4 grantno: FG06-84ER60265 doi:10.2172/6887503 osti: 6887503 https://digital.library.unt.edu/ark:/67531/metadc1187024/ ark: ark:/67531/metadc1187024 Mammals Carbon Isotopes Tundra Polar Regions Ecosystems Vertebrates 540310* -- Environment Aquatic-- Basic Studies-- (1990-) Arctic Regions Radioactivity Isotopes Isotope Ratio Even-Odd Nuclei Labelled Compounds Animals Alaska Light Nuclei Stable Isotopes Carbon Compounds Nuclei Ruminants Coastal Regions Cryosphere Aquatic Ecosystems 540210 -- Environment Terrestrial-- Basic Studies-- (1990-) Plants Deer Mosses Natural Radioactivity Energy Budgets Bryophyta Usa Carbon 13 Carbon 14 Compounds North America 54 Environmental Sciences Developed Countries Report 1988 ftunivnotexas https://doi.org/10.2172/6887503 2019-05-25T22:08:34Z Natural isotope abundances to trace major pathways of energy flow to consumers in Imnavait Creek and the tundra ecosystem of the R4D watershed with comparative work in the coastal tundra. Our overall goals are to a determine if carbon is accumulating in upland and coastal tundra; determine the role of eroded peat carbon in the aquatic ecosystem; and to determine the distribution of carbon and nitrogen isotopes in the tundra-pond ecosystem to establish the feasibility of using natural differences as tracers. Past work on fishes, birds, and the prey species of insects and aquatic crustaceans has shown that peat carbon is very important in the energy supply supporting the food webs over the course of the year. Obligate freshwater fishes from the coastal lakes and Colville River have been shown to contain up to 60 percent peat carbon at the end of the winter season. In contrast, migratory shorebirds and passerines contained much smaller radiocarbon abundances in summer, indicating a major shift to recent in situ primary production in pond and stream ecosystems in summer months. For the past two years, we have narrowed our focus to the processes supplying carbon to the beaded stream system at MS-117 and have concentrated on determining the transfer and accumulation rates of carbon in the watershed. Report Arctic Tundra Alaska University of North Texas: UNT Digital Library Arctic |
institution |
Open Polar |
collection |
University of North Texas: UNT Digital Library |
op_collection_id |
ftunivnotexas |
language |
English |
topic |
Mammals Carbon Isotopes Tundra Polar Regions Ecosystems Vertebrates 540310* -- Environment Aquatic-- Basic Studies-- (1990-) Arctic Regions Radioactivity Isotopes Isotope Ratio Even-Odd Nuclei Labelled Compounds Animals Alaska Light Nuclei Stable Isotopes Carbon Compounds Nuclei Ruminants Coastal Regions Cryosphere Aquatic Ecosystems 540210 -- Environment Terrestrial-- Basic Studies-- (1990-) Plants Deer Mosses Natural Radioactivity Energy Budgets Bryophyta Usa Carbon 13 Carbon 14 Compounds North America 54 Environmental Sciences Developed Countries |
spellingShingle |
Mammals Carbon Isotopes Tundra Polar Regions Ecosystems Vertebrates 540310* -- Environment Aquatic-- Basic Studies-- (1990-) Arctic Regions Radioactivity Isotopes Isotope Ratio Even-Odd Nuclei Labelled Compounds Animals Alaska Light Nuclei Stable Isotopes Carbon Compounds Nuclei Ruminants Coastal Regions Cryosphere Aquatic Ecosystems 540210 -- Environment Terrestrial-- Basic Studies-- (1990-) Plants Deer Mosses Natural Radioactivity Energy Budgets Bryophyta Usa Carbon 13 Carbon 14 Compounds North America 54 Environmental Sciences Developed Countries Schell, D.M. Energy flow in an arctic aquatic ecosystem |
topic_facet |
Mammals Carbon Isotopes Tundra Polar Regions Ecosystems Vertebrates 540310* -- Environment Aquatic-- Basic Studies-- (1990-) Arctic Regions Radioactivity Isotopes Isotope Ratio Even-Odd Nuclei Labelled Compounds Animals Alaska Light Nuclei Stable Isotopes Carbon Compounds Nuclei Ruminants Coastal Regions Cryosphere Aquatic Ecosystems 540210 -- Environment Terrestrial-- Basic Studies-- (1990-) Plants Deer Mosses Natural Radioactivity Energy Budgets Bryophyta Usa Carbon 13 Carbon 14 Compounds North America 54 Environmental Sciences Developed Countries |
description |
Natural isotope abundances to trace major pathways of energy flow to consumers in Imnavait Creek and the tundra ecosystem of the R4D watershed with comparative work in the coastal tundra. Our overall goals are to a determine if carbon is accumulating in upland and coastal tundra; determine the role of eroded peat carbon in the aquatic ecosystem; and to determine the distribution of carbon and nitrogen isotopes in the tundra-pond ecosystem to establish the feasibility of using natural differences as tracers. Past work on fishes, birds, and the prey species of insects and aquatic crustaceans has shown that peat carbon is very important in the energy supply supporting the food webs over the course of the year. Obligate freshwater fishes from the coastal lakes and Colville River have been shown to contain up to 60 percent peat carbon at the end of the winter season. In contrast, migratory shorebirds and passerines contained much smaller radiocarbon abundances in summer, indicating a major shift to recent in situ primary production in pond and stream ecosystems in summer months. For the past two years, we have narrowed our focus to the processes supplying carbon to the beaded stream system at MS-117 and have concentrated on determining the transfer and accumulation rates of carbon in the watershed. |
author2 |
United States. Department of Energy. |
format |
Report |
author |
Schell, D.M. |
author_facet |
Schell, D.M. |
author_sort |
Schell, D.M. |
title |
Energy flow in an arctic aquatic ecosystem |
title_short |
Energy flow in an arctic aquatic ecosystem |
title_full |
Energy flow in an arctic aquatic ecosystem |
title_fullStr |
Energy flow in an arctic aquatic ecosystem |
title_full_unstemmed |
Energy flow in an arctic aquatic ecosystem |
title_sort |
energy flow in an arctic aquatic ecosystem |
publisher |
Alaska Univ., Fairbanks, AK (United States). Inst. of Northern Engineering |
publishDate |
1988 |
url |
https://doi.org/10.2172/6887503 https://digital.library.unt.edu/ark:/67531/metadc1187024/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Tundra Alaska |
genre_facet |
Arctic Tundra Alaska |
op_relation |
other: DE93010983 rep-no: DOE/ER/60265-4 grantno: FG06-84ER60265 doi:10.2172/6887503 osti: 6887503 https://digital.library.unt.edu/ark:/67531/metadc1187024/ ark: ark:/67531/metadc1187024 |
op_doi |
https://doi.org/10.2172/6887503 |
_version_ |
1766332550171590656 |