Coccolithophores in high latitude and Polar regions: Relationships between community composition, calcification and environmental factors
Coccolithophores are a unique group of calcifying phytoplankton that dominate pelagic biogenic calcification and facilitate carbon export. Changes in coccolithophore calcite production through changes in their abundance, species distribution or cellular calcification could affect the oceanic carbon...
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ftsouthampton:oai:eprints.soton.ac.uk:209545 2023-07-30T04:01:22+02:00 Coccolithophores in high latitude and Polar regions: Relationships between community composition, calcification and environmental factors Charalampopoulou, Anastasia 2011-07 text https://eprints.soton.ac.uk/209545/ https://eprints.soton.ac.uk/209545/1/Charalampopoulou_PhD_2011.pdf en eng https://eprints.soton.ac.uk/209545/1/Charalampopoulou_PhD_2011.pdf Charalampopoulou, Anastasia (2011) Coccolithophores in high latitude and Polar regions: Relationships between community composition, calcification and environmental factors. University of Southampton, School of Ocean and Earth Science, Doctoral Thesis, 139pp. Thesis NonPeerReviewed 2011 ftsouthampton 2023-07-09T21:25:23Z Coccolithophores are a unique group of calcifying phytoplankton that dominate pelagic biogenic calcification and facilitate carbon export. Changes in coccolithophore calcite production through changes in their abundance, species distribution or cellular calcification could affect the oceanic carbon cycle. Ocean acidification, global warming and future changes in nutrient and light conditions might affect coccolithophore populations. This study investigated the relationships between coccolithophore distribution and calcification and environmental factors, between the North Sea and the Arctic Ocean and in the Southern Ocean. Large gradients in carbonate chemistry and other variables provided insights into coccolithophore response to concurrent changes in the future ocean. Freshwater inputs and biological processes were driving the carbonate chemistry changes in the surface waters of the North Sea, the Norwegian Sea and the Svalbard Arctic region. Even though biological processes seemed to play a major role in shaping the saturation state (calcite) and pH of these regions, the carbonate chemistry of the freshwater sources (Baltic Sea, sea-ice melt, riverine input/ terrestrial runoff) was also important and had accentuated the effects of biological activity. A multivariate approach showed that changes in pH and mixed layer irradiance explained most of the variation in coccolithophore distribution and community composition between the North Sea and Svalbard. Differences between the Svalbard population (dominated by the family Papposphaeraceae) and those from other regions were mostly explained by pH, whereas mixed layer irradiance explained most of the variation between the North Sea, Norwegian Sea and Arctic water assemblages. Estimates of cell specific calcification rates showed that species composition can considerably affect community calcification. At Drake Passage, the coccolithophore community was dominated by Emiliania huxleyi B/C. Diversity and abundance were highest in the Subantarctic and Polar Frontal ... Thesis Arctic Arctic Ocean Drake Passage Global warming Norwegian Sea Ocean acidification Phytoplankton Sea ice Southern Ocean Svalbard University of Southampton: e-Prints Soton Arctic Arctic Ocean Drake Passage Norwegian Sea Southern Ocean Svalbard |
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University of Southampton: e-Prints Soton |
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ftsouthampton |
language |
English |
description |
Coccolithophores are a unique group of calcifying phytoplankton that dominate pelagic biogenic calcification and facilitate carbon export. Changes in coccolithophore calcite production through changes in their abundance, species distribution or cellular calcification could affect the oceanic carbon cycle. Ocean acidification, global warming and future changes in nutrient and light conditions might affect coccolithophore populations. This study investigated the relationships between coccolithophore distribution and calcification and environmental factors, between the North Sea and the Arctic Ocean and in the Southern Ocean. Large gradients in carbonate chemistry and other variables provided insights into coccolithophore response to concurrent changes in the future ocean. Freshwater inputs and biological processes were driving the carbonate chemistry changes in the surface waters of the North Sea, the Norwegian Sea and the Svalbard Arctic region. Even though biological processes seemed to play a major role in shaping the saturation state (calcite) and pH of these regions, the carbonate chemistry of the freshwater sources (Baltic Sea, sea-ice melt, riverine input/ terrestrial runoff) was also important and had accentuated the effects of biological activity. A multivariate approach showed that changes in pH and mixed layer irradiance explained most of the variation in coccolithophore distribution and community composition between the North Sea and Svalbard. Differences between the Svalbard population (dominated by the family Papposphaeraceae) and those from other regions were mostly explained by pH, whereas mixed layer irradiance explained most of the variation between the North Sea, Norwegian Sea and Arctic water assemblages. Estimates of cell specific calcification rates showed that species composition can considerably affect community calcification. At Drake Passage, the coccolithophore community was dominated by Emiliania huxleyi B/C. Diversity and abundance were highest in the Subantarctic and Polar Frontal ... |
format |
Thesis |
author |
Charalampopoulou, Anastasia |
spellingShingle |
Charalampopoulou, Anastasia Coccolithophores in high latitude and Polar regions: Relationships between community composition, calcification and environmental factors |
author_facet |
Charalampopoulou, Anastasia |
author_sort |
Charalampopoulou, Anastasia |
title |
Coccolithophores in high latitude and Polar regions: Relationships between community composition, calcification and environmental factors |
title_short |
Coccolithophores in high latitude and Polar regions: Relationships between community composition, calcification and environmental factors |
title_full |
Coccolithophores in high latitude and Polar regions: Relationships between community composition, calcification and environmental factors |
title_fullStr |
Coccolithophores in high latitude and Polar regions: Relationships between community composition, calcification and environmental factors |
title_full_unstemmed |
Coccolithophores in high latitude and Polar regions: Relationships between community composition, calcification and environmental factors |
title_sort |
coccolithophores in high latitude and polar regions: relationships between community composition, calcification and environmental factors |
publishDate |
2011 |
url |
https://eprints.soton.ac.uk/209545/ https://eprints.soton.ac.uk/209545/1/Charalampopoulou_PhD_2011.pdf |
geographic |
Arctic Arctic Ocean Drake Passage Norwegian Sea Southern Ocean Svalbard |
geographic_facet |
Arctic Arctic Ocean Drake Passage Norwegian Sea Southern Ocean Svalbard |
genre |
Arctic Arctic Ocean Drake Passage Global warming Norwegian Sea Ocean acidification Phytoplankton Sea ice Southern Ocean Svalbard |
genre_facet |
Arctic Arctic Ocean Drake Passage Global warming Norwegian Sea Ocean acidification Phytoplankton Sea ice Southern Ocean Svalbard |
op_relation |
https://eprints.soton.ac.uk/209545/1/Charalampopoulou_PhD_2011.pdf Charalampopoulou, Anastasia (2011) Coccolithophores in high latitude and Polar regions: Relationships between community composition, calcification and environmental factors. University of Southampton, School of Ocean and Earth Science, Doctoral Thesis, 139pp. |
_version_ |
1772812105676750848 |