Sustained glider observations of acoustic scattering suggest zooplankton patches are driven by vertical migration and surface advective features in Palmer Canyon, Antarctica
Antarctic zooplankton and micronekton link the highly productive waters of the Southern Ocean to upper trophic levels. The distribution of zooplankton and micronekton is highly patchy both vertically and horizontally, suggesting that both behavior and oceanographic advection are important for unders...
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ftunivdelaware:oai:udspace.udel.edu:19716/23779 2023-06-11T04:06:49+02:00 Sustained glider observations of acoustic scattering suggest zooplankton patches are driven by vertical migration and surface advective features in Palmer Canyon, Antarctica Goodrich, Cordielyn S. 2018-07-24T19:08:00Z application/pdf http://udspace.udel.edu/handle/19716/23779 en eng University of Delaware https://search.proquest.com/docview/2088484930?accountid=10457 1051299915 http://udspace.udel.edu/handle/19716/23779 Biological sciences Earth sciences Acoustics Antarctica Autonomous underwater vehicle (AUV) High frequency radar Krill Zooplankton Thesis 2018 ftunivdelaware 2023-05-01T12:53:01Z Antarctic zooplankton and micronekton link the highly productive waters of the Southern Ocean to upper trophic levels. The distribution of zooplankton and micronekton is highly patchy both vertically and horizontally, suggesting that both behavior and oceanographic advection are important for understanding their distributions. A Slocum glider was deployed with an acoustic Doppler current profiler within a surface current field measured by HF-Radar in Palmer Canyon, Antarctica, during austral summer. I used this data to investigate the relative importance of surface currents and vertical migration behavior on the presence of zooplankton and micronekton in the mixed layer. I show that zooplankton and micronekton are more likely to be found shallower than the mixed layer during night-time hours, indicating diel vertical migration is a driver of their vertical distribution. I also found both Eulerian and Lagrangian characterizations of surface physical features to be important in predicting the presence of zooplankton and micronekton shallower than the mixed layer. While I found that both diel vertical migration (DVM) and surface currents were significant predictors of zooplankton and micronekton presence above the mixed layer, the strongest predictor of zooplankton and micronekton presence were surface currents represented as repelling Lagrangian Coherent Structures (LCS). This indicates that in this region during summer, horizontal advection and behavior plays a critical component in structuring zooplankton and micronekton distributions. Oliver, Matthew J. M.S. University of Delaware, School of Marine Science and Policy Thesis Antarc* Antarctic Antarctica Southern Ocean The University of Delaware Library Institutional Repository Antarctic Southern Ocean Austral |
institution |
Open Polar |
collection |
The University of Delaware Library Institutional Repository |
op_collection_id |
ftunivdelaware |
language |
English |
topic |
Biological sciences Earth sciences Acoustics Antarctica Autonomous underwater vehicle (AUV) High frequency radar Krill Zooplankton |
spellingShingle |
Biological sciences Earth sciences Acoustics Antarctica Autonomous underwater vehicle (AUV) High frequency radar Krill Zooplankton Goodrich, Cordielyn S. Sustained glider observations of acoustic scattering suggest zooplankton patches are driven by vertical migration and surface advective features in Palmer Canyon, Antarctica |
topic_facet |
Biological sciences Earth sciences Acoustics Antarctica Autonomous underwater vehicle (AUV) High frequency radar Krill Zooplankton |
description |
Antarctic zooplankton and micronekton link the highly productive waters of the Southern Ocean to upper trophic levels. The distribution of zooplankton and micronekton is highly patchy both vertically and horizontally, suggesting that both behavior and oceanographic advection are important for understanding their distributions. A Slocum glider was deployed with an acoustic Doppler current profiler within a surface current field measured by HF-Radar in Palmer Canyon, Antarctica, during austral summer. I used this data to investigate the relative importance of surface currents and vertical migration behavior on the presence of zooplankton and micronekton in the mixed layer. I show that zooplankton and micronekton are more likely to be found shallower than the mixed layer during night-time hours, indicating diel vertical migration is a driver of their vertical distribution. I also found both Eulerian and Lagrangian characterizations of surface physical features to be important in predicting the presence of zooplankton and micronekton shallower than the mixed layer. While I found that both diel vertical migration (DVM) and surface currents were significant predictors of zooplankton and micronekton presence above the mixed layer, the strongest predictor of zooplankton and micronekton presence were surface currents represented as repelling Lagrangian Coherent Structures (LCS). This indicates that in this region during summer, horizontal advection and behavior plays a critical component in structuring zooplankton and micronekton distributions. Oliver, Matthew J. M.S. University of Delaware, School of Marine Science and Policy |
format |
Thesis |
author |
Goodrich, Cordielyn S. |
author_facet |
Goodrich, Cordielyn S. |
author_sort |
Goodrich, Cordielyn S. |
title |
Sustained glider observations of acoustic scattering suggest zooplankton patches are driven by vertical migration and surface advective features in Palmer Canyon, Antarctica |
title_short |
Sustained glider observations of acoustic scattering suggest zooplankton patches are driven by vertical migration and surface advective features in Palmer Canyon, Antarctica |
title_full |
Sustained glider observations of acoustic scattering suggest zooplankton patches are driven by vertical migration and surface advective features in Palmer Canyon, Antarctica |
title_fullStr |
Sustained glider observations of acoustic scattering suggest zooplankton patches are driven by vertical migration and surface advective features in Palmer Canyon, Antarctica |
title_full_unstemmed |
Sustained glider observations of acoustic scattering suggest zooplankton patches are driven by vertical migration and surface advective features in Palmer Canyon, Antarctica |
title_sort |
sustained glider observations of acoustic scattering suggest zooplankton patches are driven by vertical migration and surface advective features in palmer canyon, antarctica |
publisher |
University of Delaware |
publishDate |
2018 |
url |
http://udspace.udel.edu/handle/19716/23779 |
geographic |
Antarctic Southern Ocean Austral |
geographic_facet |
Antarctic Southern Ocean Austral |
genre |
Antarc* Antarctic Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Southern Ocean |
op_relation |
https://search.proquest.com/docview/2088484930?accountid=10457 1051299915 http://udspace.udel.edu/handle/19716/23779 |
_version_ |
1768378994130944000 |