A Temporal comparison of the eelgrass (Zostera marina L.) food web and community structure at Izembek Lagoon, Alaska from the mid-1970's to 2008
Thesis (M.S.) University of Alaska Fairbanks, 2013 This thesis investigates food web and community structure in Izembek Lagoon, Alaska, an ecologically important sub-arctic seagrass system. Unprecedented environmental changes in high latitudes, such as increased sea-surface temperatures and a shorte...
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ftunivalaska:oai:scholarworks.alaska.edu:11122/4514 2023-05-15T15:06:43+02:00 A Temporal comparison of the eelgrass (Zostera marina L.) food web and community structure at Izembek Lagoon, Alaska from the mid-1970's to 2008 Tippery, Amy C. Wooller, Matthew Konar, Brenda Iken, Katrin 2013-05 http://hdl.handle.net/11122/4514 unknown http://hdl.handle.net/11122/4514 Program in Marine Science and Limnology Thesis ms 2013 ftunivalaska 2023-02-23T21:36:15Z Thesis (M.S.) University of Alaska Fairbanks, 2013 This thesis investigates food web and community structure in Izembek Lagoon, Alaska, an ecologically important sub-arctic seagrass system. Unprecedented environmental changes in high latitudes, such as increased sea-surface temperatures and a shorter duration of shore-fast sea ice, may now favor seagrass over phytoplankton production as compared to forty years ago. Any resulting shifts in food web and community dynamics could have substantial consequences given the importance of seagrass habitat for Alaskan fisheries, global migratory bird populations and benthic energy transformation. Recent (2008) stable isotope (C and N) values and benthic community metrics were gathered and compared to results from a similar study from the mid-1970’s to gauge temporal food web and community structure differences. An increase in reliance on seagrass carbon was detected in organisms involved in detrital and sediment processing. An increase in abundance of certain benthic organisms and a decrease in overall community evenness were also seen. These findings suggest an escalation in delivery of seagrass carbon to the food web, possibly induced by changing seagrass morphology or bed density at this location. Thesis Arctic Phytoplankton Sea ice Alaska University of Alaska: ScholarWorks@UA Arctic Fairbanks |
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University of Alaska: ScholarWorks@UA |
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ftunivalaska |
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unknown |
description |
Thesis (M.S.) University of Alaska Fairbanks, 2013 This thesis investigates food web and community structure in Izembek Lagoon, Alaska, an ecologically important sub-arctic seagrass system. Unprecedented environmental changes in high latitudes, such as increased sea-surface temperatures and a shorter duration of shore-fast sea ice, may now favor seagrass over phytoplankton production as compared to forty years ago. Any resulting shifts in food web and community dynamics could have substantial consequences given the importance of seagrass habitat for Alaskan fisheries, global migratory bird populations and benthic energy transformation. Recent (2008) stable isotope (C and N) values and benthic community metrics were gathered and compared to results from a similar study from the mid-1970’s to gauge temporal food web and community structure differences. An increase in reliance on seagrass carbon was detected in organisms involved in detrital and sediment processing. An increase in abundance of certain benthic organisms and a decrease in overall community evenness were also seen. These findings suggest an escalation in delivery of seagrass carbon to the food web, possibly induced by changing seagrass morphology or bed density at this location. |
author2 |
Wooller, Matthew Konar, Brenda Iken, Katrin |
format |
Thesis |
author |
Tippery, Amy C. |
spellingShingle |
Tippery, Amy C. A Temporal comparison of the eelgrass (Zostera marina L.) food web and community structure at Izembek Lagoon, Alaska from the mid-1970's to 2008 |
author_facet |
Tippery, Amy C. |
author_sort |
Tippery, Amy C. |
title |
A Temporal comparison of the eelgrass (Zostera marina L.) food web and community structure at Izembek Lagoon, Alaska from the mid-1970's to 2008 |
title_short |
A Temporal comparison of the eelgrass (Zostera marina L.) food web and community structure at Izembek Lagoon, Alaska from the mid-1970's to 2008 |
title_full |
A Temporal comparison of the eelgrass (Zostera marina L.) food web and community structure at Izembek Lagoon, Alaska from the mid-1970's to 2008 |
title_fullStr |
A Temporal comparison of the eelgrass (Zostera marina L.) food web and community structure at Izembek Lagoon, Alaska from the mid-1970's to 2008 |
title_full_unstemmed |
A Temporal comparison of the eelgrass (Zostera marina L.) food web and community structure at Izembek Lagoon, Alaska from the mid-1970's to 2008 |
title_sort |
temporal comparison of the eelgrass (zostera marina l.) food web and community structure at izembek lagoon, alaska from the mid-1970's to 2008 |
publishDate |
2013 |
url |
http://hdl.handle.net/11122/4514 |
geographic |
Arctic Fairbanks |
geographic_facet |
Arctic Fairbanks |
genre |
Arctic Phytoplankton Sea ice Alaska |
genre_facet |
Arctic Phytoplankton Sea ice Alaska |
op_relation |
http://hdl.handle.net/11122/4514 Program in Marine Science and Limnology |
_version_ |
1766338266795081728 |