Nutrient Recycling by Fish and Zooplankton in Arctic Alaskan Lakes
Lakes in Arctic Alaska are typically ultra-oligotrophic, and as such quantifying sources of inorganic nutrients algal growth. Fish can impact internal nutrient cycles either directly, by translocating nutrients from benthic to pelagic habitats, or indirectly through predation control of nutrient rec...
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ftutahsudc:oai:digitalcommons.usu.edu:runoff-1214 2023-05-15T14:53:55+02:00 Nutrient Recycling by Fish and Zooplankton in Arctic Alaskan Lakes Johnson, Cody 2008-04-01T01:25:00Z https://digitalcommons.usu.edu/runoff/2008/Posters/12 unknown DigitalCommons@USU https://digitalcommons.usu.edu/runoff/2008/Posters/12 Spring Runoff Conference Life Sciences Physical Sciences and Mathematics text 2008 ftutahsudc 2022-03-07T21:20:01Z Lakes in Arctic Alaska are typically ultra-oligotrophic, and as such quantifying sources of inorganic nutrients algal growth. Fish can impact internal nutrient cycles either directly, by translocating nutrients from benthic to pelagic habitats, or indirectly through predation control of nutrient recycling by lower trophic levels. We looked at the direct and indirect effects of the presence of fish communities on lake consumer nutrient recycling. Fish populations were low in all of our lakes, and direct nutrient translocation was also found to be minimal. Fish had a much larger impact on consumer nutrient recycling by lower trophic levels. Zooplankton communities in lakes with fish were dominated by smaller individuals, which recycle nutrients at a higher mass specific rate. Consequently, zooplankton recycling rates were much higher in lakes with resident fish populations, and supplied a greater proportion of nutrients required for primary productivity compared to lakes without fish. Text Arctic Zooplankton Alaska Utah State University: DigitalCommons@USU Arctic |
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Utah State University: DigitalCommons@USU |
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Life Sciences Physical Sciences and Mathematics |
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Life Sciences Physical Sciences and Mathematics Johnson, Cody Nutrient Recycling by Fish and Zooplankton in Arctic Alaskan Lakes |
topic_facet |
Life Sciences Physical Sciences and Mathematics |
description |
Lakes in Arctic Alaska are typically ultra-oligotrophic, and as such quantifying sources of inorganic nutrients algal growth. Fish can impact internal nutrient cycles either directly, by translocating nutrients from benthic to pelagic habitats, or indirectly through predation control of nutrient recycling by lower trophic levels. We looked at the direct and indirect effects of the presence of fish communities on lake consumer nutrient recycling. Fish populations were low in all of our lakes, and direct nutrient translocation was also found to be minimal. Fish had a much larger impact on consumer nutrient recycling by lower trophic levels. Zooplankton communities in lakes with fish were dominated by smaller individuals, which recycle nutrients at a higher mass specific rate. Consequently, zooplankton recycling rates were much higher in lakes with resident fish populations, and supplied a greater proportion of nutrients required for primary productivity compared to lakes without fish. |
format |
Text |
author |
Johnson, Cody |
author_facet |
Johnson, Cody |
author_sort |
Johnson, Cody |
title |
Nutrient Recycling by Fish and Zooplankton in Arctic Alaskan Lakes |
title_short |
Nutrient Recycling by Fish and Zooplankton in Arctic Alaskan Lakes |
title_full |
Nutrient Recycling by Fish and Zooplankton in Arctic Alaskan Lakes |
title_fullStr |
Nutrient Recycling by Fish and Zooplankton in Arctic Alaskan Lakes |
title_full_unstemmed |
Nutrient Recycling by Fish and Zooplankton in Arctic Alaskan Lakes |
title_sort |
nutrient recycling by fish and zooplankton in arctic alaskan lakes |
publisher |
DigitalCommons@USU |
publishDate |
2008 |
url |
https://digitalcommons.usu.edu/runoff/2008/Posters/12 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Zooplankton Alaska |
genre_facet |
Arctic Zooplankton Alaska |
op_source |
Spring Runoff Conference |
op_relation |
https://digitalcommons.usu.edu/runoff/2008/Posters/12 |
_version_ |
1766325610696671232 |