Investigations for utilizing pteropods as bioindicators of environmental change along the western Antarctic Peninsula
Pteropods are holoplanktonic gastropod molluscs found globally. Although species diversity is greater at lower latitudes, species abundance is greater at temperate and polar latitudes. Declines in pteropod populations have not only been correlated to declines of their major predators, but pteropods...
Main Author: | |
---|---|
Format: | Doctoral or Postdoctoral Thesis |
Language: | unknown |
Published: |
Digital Commons @ University of South Florida
2013
|
Subjects: | |
Online Access: | https://digitalcommons.usf.edu/etd/4588 https://digitalcommons.usf.edu/context/etd/article/5785/viewcontent/Suprenand_usf_0206D_11669.pdf |
id |
ftunisfloridatam:oai:digitalcommons.usf.edu:etd-5785 |
---|---|
record_format |
openpolar |
spelling |
ftunisfloridatam:oai:digitalcommons.usf.edu:etd-5785 2023-06-11T04:04:53+02:00 Investigations for utilizing pteropods as bioindicators of environmental change along the western Antarctic Peninsula Suprenand, Paul Mark 2013-01-01T08:00:00Z application/pdf https://digitalcommons.usf.edu/etd/4588 https://digitalcommons.usf.edu/context/etd/article/5785/viewcontent/Suprenand_usf_0206D_11669.pdf unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/etd/4588 https://digitalcommons.usf.edu/context/etd/article/5785/viewcontent/Suprenand_usf_0206D_11669.pdf default USF Tampa Graduate Theses and Dissertations Climate Change Ecology Marine Modelling Ocean Acidification Physiology Other Oceanography and Atmospheric Sciences and Meteorology dissertation 2013 ftunisfloridatam 2023-05-04T18:03:48Z Pteropods are holoplanktonic gastropod molluscs found globally. Although species diversity is greater at lower latitudes, species abundance is greater at temperate and polar latitudes. Declines in pteropod populations have not only been correlated to declines of their major predators, but pteropods have also been used as bioindicators of global environmental changes such as ocean acidification. With high latitude abundances, pteropods provide significant sustenance for species such as the Atlantic salmon in the Atlantic Ocean and Pleuragramma antarcticum in the Southern Ocean. Because pteropods eat phytoplankton and other pteropods, factors that affect pteropod abundance influence many trophic levels. This dissertation explores ecological, physiological and trophodynamic relationships of pteropods when considering the influences of environmental factors observed to be altering the western Antarctic Peninsula's marine ecosystem. Over the last few decades very few studies have reported the distributions of pteropods along the western Antarctic Peninsula, in particular south of the Gerlache Strait. The ecological study provided the first detailed report of the pteropods Spongiobranchaea australis and Clione antarctica along the western Antarctic Peninsula south of the Gerlache Strait, and their local distribution was correlated to the region's major water masses and mesoscale water mass circulation. The physiological study of S. australis and C. antarctica yielded the first account of their metabolism, ratios of oxygen consumed to nitrogen excreted, proximate body composition, primary substrates oxidized, and enzymatic activities along the study's latitudinal gradient; the first report of S. australis' physiology anywhere around Antarctica. The final chapter utilized a comprehensive Ecopath with Ecosim model of the western Antarctic Peninsula's marine ecosystem. The model was used to explore the trophodynamic significance of pteropods within their polar marine ecosystem as well as changes in whole ecosystem ... Doctoral or Postdoctoral Thesis Antarc* Antarctic Antarctic Peninsula Antarctica Atlantic salmon Ocean acidification Southern Ocean Digital Commons University of South Florida (USF) Antarctic Southern Ocean Antarctic Peninsula Gerlache ENVELOPE(99.033,99.033,-66.500,-66.500) Gerlache Strait ENVELOPE(-62.333,-62.333,-64.500,-64.500) |
institution |
Open Polar |
collection |
Digital Commons University of South Florida (USF) |
op_collection_id |
ftunisfloridatam |
language |
unknown |
topic |
Climate Change Ecology Marine Modelling Ocean Acidification Physiology Other Oceanography and Atmospheric Sciences and Meteorology |
spellingShingle |
Climate Change Ecology Marine Modelling Ocean Acidification Physiology Other Oceanography and Atmospheric Sciences and Meteorology Suprenand, Paul Mark Investigations for utilizing pteropods as bioindicators of environmental change along the western Antarctic Peninsula |
topic_facet |
Climate Change Ecology Marine Modelling Ocean Acidification Physiology Other Oceanography and Atmospheric Sciences and Meteorology |
description |
Pteropods are holoplanktonic gastropod molluscs found globally. Although species diversity is greater at lower latitudes, species abundance is greater at temperate and polar latitudes. Declines in pteropod populations have not only been correlated to declines of their major predators, but pteropods have also been used as bioindicators of global environmental changes such as ocean acidification. With high latitude abundances, pteropods provide significant sustenance for species such as the Atlantic salmon in the Atlantic Ocean and Pleuragramma antarcticum in the Southern Ocean. Because pteropods eat phytoplankton and other pteropods, factors that affect pteropod abundance influence many trophic levels. This dissertation explores ecological, physiological and trophodynamic relationships of pteropods when considering the influences of environmental factors observed to be altering the western Antarctic Peninsula's marine ecosystem. Over the last few decades very few studies have reported the distributions of pteropods along the western Antarctic Peninsula, in particular south of the Gerlache Strait. The ecological study provided the first detailed report of the pteropods Spongiobranchaea australis and Clione antarctica along the western Antarctic Peninsula south of the Gerlache Strait, and their local distribution was correlated to the region's major water masses and mesoscale water mass circulation. The physiological study of S. australis and C. antarctica yielded the first account of their metabolism, ratios of oxygen consumed to nitrogen excreted, proximate body composition, primary substrates oxidized, and enzymatic activities along the study's latitudinal gradient; the first report of S. australis' physiology anywhere around Antarctica. The final chapter utilized a comprehensive Ecopath with Ecosim model of the western Antarctic Peninsula's marine ecosystem. The model was used to explore the trophodynamic significance of pteropods within their polar marine ecosystem as well as changes in whole ecosystem ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Suprenand, Paul Mark |
author_facet |
Suprenand, Paul Mark |
author_sort |
Suprenand, Paul Mark |
title |
Investigations for utilizing pteropods as bioindicators of environmental change along the western Antarctic Peninsula |
title_short |
Investigations for utilizing pteropods as bioindicators of environmental change along the western Antarctic Peninsula |
title_full |
Investigations for utilizing pteropods as bioindicators of environmental change along the western Antarctic Peninsula |
title_fullStr |
Investigations for utilizing pteropods as bioindicators of environmental change along the western Antarctic Peninsula |
title_full_unstemmed |
Investigations for utilizing pteropods as bioindicators of environmental change along the western Antarctic Peninsula |
title_sort |
investigations for utilizing pteropods as bioindicators of environmental change along the western antarctic peninsula |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2013 |
url |
https://digitalcommons.usf.edu/etd/4588 https://digitalcommons.usf.edu/context/etd/article/5785/viewcontent/Suprenand_usf_0206D_11669.pdf |
long_lat |
ENVELOPE(99.033,99.033,-66.500,-66.500) ENVELOPE(-62.333,-62.333,-64.500,-64.500) |
geographic |
Antarctic Southern Ocean Antarctic Peninsula Gerlache Gerlache Strait |
geographic_facet |
Antarctic Southern Ocean Antarctic Peninsula Gerlache Gerlache Strait |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Atlantic salmon Ocean acidification Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Atlantic salmon Ocean acidification Southern Ocean |
op_source |
USF Tampa Graduate Theses and Dissertations |
op_relation |
https://digitalcommons.usf.edu/etd/4588 https://digitalcommons.usf.edu/context/etd/article/5785/viewcontent/Suprenand_usf_0206D_11669.pdf |
op_rights |
default |
_version_ |
1768391563024531456 |