The Influences of Nutrients and Snow on the Spatial and Temporal Variability of Sea Ice Algae
Polar marine regions are dominated by sea ice, where large gradients in temperature, salinity, nutrients and light occur. Despite this, a rich community exists within the sea ice, consisting of prokaryotic organisms, several algal groups and small zooplankton. Prokaryotes are present in the largest...
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ftsmithonian:oai:figshare.com:article/17005474 2023-05-15T13:37:42+02:00 The Influences of Nutrients and Snow on the Spatial and Temporal Variability of Sea Ice Algae Vermeulen, Francisca A.H. (11693821) 2013-01-01T00:00:00Z https://doi.org/10.26686/wgtn.17005474.v1 unknown https://figshare.com/articles/thesis/The_Influences_of_Nutrients_and_Snow_on_the_Spatial_and_Temporal_Variability_of_Sea_Ice_Algae/17005474 doi:10.26686/wgtn.17005474.v1 Author Retains Copyright Biological Sciences not elsewhere classified Diatoms Antarctica Community structures School: School of Biological Sciences 069999 Biological Sciences not elsewhere classified 970106 Expanding Knowledge in the Biological Sciences Degree Discipline: Cell and Molecular Bioscience Degree Level: Doctoral Degree Name: Doctor of Philosophy Text Thesis 2013 ftsmithonian https://doi.org/10.26686/wgtn.17005474.v1 2021-12-19T21:55:40Z Polar marine regions are dominated by sea ice, where large gradients in temperature, salinity, nutrients and light occur. Despite this, a rich community exists within the sea ice, consisting of prokaryotic organisms, several algal groups and small zooplankton. Prokaryotes are present in the largest abundance in the sea ice; however, diatoms dominate in biomass. Diatoms are the main primary producers within the ice and they form a vital food source for many organisms. However, factors determining species composition, abundance, spatial and temporal variability and nutrient requirement are relatively poorly understood. In order to increase understanding of these processes, an integrated approach was used in this thesis to provide an insight into the potential changes to the ecology of the Southern Ocean in relation to predicted climate change. In this thesis, I studied ice algal community structure, diversity and nutrient requirements at several locations in the sea ice of the Ross Sea, Antarctica. Though many previous studies have focussed on these organisms, this is the first study to I) integrate recent and historical data collected over 30 years and to compare spatial and temporal differences in sea ice communities, II) use the near real time nutrient induced fluorescence transient (NIFT) method to study nutrient limitation in sea ice and further develop this method for use with the imaging pulse amplitude modulator (I-PAM), III) show that Antarctic diatoms may be more susceptible to silica limitation than previously thought, despite the fact that the silica concentration in the Southern Ocean are relatively high. Results from these studies provide important new information on community structure and how it is influenced by and responds to the environment . Thesis Antarc* Antarctic Antarctica ice algae Ross Sea Sea ice Southern Ocean Unknown Antarctic Southern Ocean Ross Sea |
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Open Polar |
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Unknown |
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ftsmithonian |
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unknown |
topic |
Biological Sciences not elsewhere classified Diatoms Antarctica Community structures School: School of Biological Sciences 069999 Biological Sciences not elsewhere classified 970106 Expanding Knowledge in the Biological Sciences Degree Discipline: Cell and Molecular Bioscience Degree Level: Doctoral Degree Name: Doctor of Philosophy |
spellingShingle |
Biological Sciences not elsewhere classified Diatoms Antarctica Community structures School: School of Biological Sciences 069999 Biological Sciences not elsewhere classified 970106 Expanding Knowledge in the Biological Sciences Degree Discipline: Cell and Molecular Bioscience Degree Level: Doctoral Degree Name: Doctor of Philosophy Vermeulen, Francisca A.H. (11693821) The Influences of Nutrients and Snow on the Spatial and Temporal Variability of Sea Ice Algae |
topic_facet |
Biological Sciences not elsewhere classified Diatoms Antarctica Community structures School: School of Biological Sciences 069999 Biological Sciences not elsewhere classified 970106 Expanding Knowledge in the Biological Sciences Degree Discipline: Cell and Molecular Bioscience Degree Level: Doctoral Degree Name: Doctor of Philosophy |
description |
Polar marine regions are dominated by sea ice, where large gradients in temperature, salinity, nutrients and light occur. Despite this, a rich community exists within the sea ice, consisting of prokaryotic organisms, several algal groups and small zooplankton. Prokaryotes are present in the largest abundance in the sea ice; however, diatoms dominate in biomass. Diatoms are the main primary producers within the ice and they form a vital food source for many organisms. However, factors determining species composition, abundance, spatial and temporal variability and nutrient requirement are relatively poorly understood. In order to increase understanding of these processes, an integrated approach was used in this thesis to provide an insight into the potential changes to the ecology of the Southern Ocean in relation to predicted climate change. In this thesis, I studied ice algal community structure, diversity and nutrient requirements at several locations in the sea ice of the Ross Sea, Antarctica. Though many previous studies have focussed on these organisms, this is the first study to I) integrate recent and historical data collected over 30 years and to compare spatial and temporal differences in sea ice communities, II) use the near real time nutrient induced fluorescence transient (NIFT) method to study nutrient limitation in sea ice and further develop this method for use with the imaging pulse amplitude modulator (I-PAM), III) show that Antarctic diatoms may be more susceptible to silica limitation than previously thought, despite the fact that the silica concentration in the Southern Ocean are relatively high. Results from these studies provide important new information on community structure and how it is influenced by and responds to the environment . |
format |
Thesis |
author |
Vermeulen, Francisca A.H. (11693821) |
author_facet |
Vermeulen, Francisca A.H. (11693821) |
author_sort |
Vermeulen, Francisca A.H. (11693821) |
title |
The Influences of Nutrients and Snow on the Spatial and Temporal Variability of Sea Ice Algae |
title_short |
The Influences of Nutrients and Snow on the Spatial and Temporal Variability of Sea Ice Algae |
title_full |
The Influences of Nutrients and Snow on the Spatial and Temporal Variability of Sea Ice Algae |
title_fullStr |
The Influences of Nutrients and Snow on the Spatial and Temporal Variability of Sea Ice Algae |
title_full_unstemmed |
The Influences of Nutrients and Snow on the Spatial and Temporal Variability of Sea Ice Algae |
title_sort |
influences of nutrients and snow on the spatial and temporal variability of sea ice algae |
publishDate |
2013 |
url |
https://doi.org/10.26686/wgtn.17005474.v1 |
geographic |
Antarctic Southern Ocean Ross Sea |
geographic_facet |
Antarctic Southern Ocean Ross Sea |
genre |
Antarc* Antarctic Antarctica ice algae Ross Sea Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica ice algae Ross Sea Sea ice Southern Ocean |
op_relation |
https://figshare.com/articles/thesis/The_Influences_of_Nutrients_and_Snow_on_the_Spatial_and_Temporal_Variability_of_Sea_Ice_Algae/17005474 doi:10.26686/wgtn.17005474.v1 |
op_rights |
Author Retains Copyright |
op_doi |
https://doi.org/10.26686/wgtn.17005474.v1 |
_version_ |
1766096843004968960 |