The influence of environmental variability on the biogeography of coccolithophores and diatoms in the Great Calcite Belt
The Great Calcite Belt (GCB) of the Southern Ocean is a region of elevated summertime upper ocean calcite concentration derived from coccolithophores, despite the region being known for its diatom predominance. The overlap of two major phytoplankton groups, coccolithophores and diatoms, in the dynam...
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ftnerc:oai:nora.nerc.ac.uk:516683 2023-05-15T13:49:34+02:00 The influence of environmental variability on the biogeography of coccolithophores and diatoms in the Great Calcite Belt Smith, Helen E.K. Poulton, Alex J. Garley, Rebecca Hopkins, Jason Lubelczyk, Laura C. Drapeau, Dave T. Rauschenberg, Sara Twining, Ben S. Bates, Nicholas R. Balch, William M. 2017-11 text http://nora.nerc.ac.uk/id/eprint/516683/ https://nora.nerc.ac.uk/id/eprint/516683/19/bg-14-4905-2017.pdf https://nora.nerc.ac.uk/id/eprint/516683/7/bg-2017-110.pdf https://nora.nerc.ac.uk/id/eprint/516683/8/bg-2017-110-supplement.pdf https://nora.nerc.ac.uk/id/eprint/516683/1/Smith%20et%20al%202017%20GCB%20biogeography.pdf en eng https://nora.nerc.ac.uk/id/eprint/516683/19/bg-14-4905-2017.pdf https://nora.nerc.ac.uk/id/eprint/516683/7/bg-2017-110.pdf https://nora.nerc.ac.uk/id/eprint/516683/8/bg-2017-110-supplement.pdf https://nora.nerc.ac.uk/id/eprint/516683/1/Smith%20et%20al%202017%20GCB%20biogeography.pdf Smith, Helen E.K.; Poulton, Alex J.; Garley, Rebecca; Hopkins, Jason; Lubelczyk, Laura C.; Drapeau, Dave T.; Rauschenberg, Sara; Twining, Ben S.; Bates, Nicholas R.; Balch, William M. 2017 The influence of environmental variability on the biogeography of coccolithophores and diatoms in the Great Calcite Belt. Biogeosciences, 14. 4905-4925. https://doi.org/10.5194/bg-2017-110 <https://doi.org/10.5194/bg-2017-110> cc_by CC-BY Publication - Article PeerReviewed 2017 ftnerc https://doi.org/10.5194/bg-2017-110 2023-02-04T19:44:43Z The Great Calcite Belt (GCB) of the Southern Ocean is a region of elevated summertime upper ocean calcite concentration derived from coccolithophores, despite the region being known for its diatom predominance. The overlap of two major phytoplankton groups, coccolithophores and diatoms, in the dynamic frontal systems characteristic of this region, provides an ideal setting to study environmental influences on the distribution of different species within these taxonomic groups. Water samples for phytoplankton enumeration were collected from the upper 30 m during two cruises, the first to the South Atlantic sector (Jan–Feb 2011; 60 °W–15 °E and 36–60 °S) and the second in the South Indian sector (Feb–Mar 2012; 40–120 °E and 36–60 °S). The species composition of coccolithophores and diatoms was examined using scanning electron microscopy at 27 stations across the Sub-Tropical, Polar, and Sub-Antarctic Fronts. The influence of environmental parameters, such as sea-surface temperature (SST), salinity, carbonate chemistry (i.e., pH, partial pressure of CO2 (pCO2), alkalinity, dissolved inorganic carbon), macro-nutrients (i.e., nitrate + nitrite, phosphate, silicic acid, ammonia), and mixed layer average irradiance, on species composition across the GCB, was assessed statistically. Nanophytoplankton (cells 2–20 μm) were the numerically abundant size group of biomineralizing phytoplankton across the GCB, the coccolithophore Emiliania huxleyi and the diatoms Fragilariopsis nana, F. pseudonana and Pseudonitzschia sp. were the most dominant and widely distributed species. A combination of SST, macro-nutrient concentrations and pCO2 were the best statistical descriptors of biogeographic variability of biomineralizing species composition between stations. Emiliania huxleyi occurred in the silicic acid-depleted waters between the Sub-Antarctic Front and the Polar Front, indicating a favorable environment for this coccolithophore in the GCB after spring diatom blooms remove silicic acid to limiting levels. After full ... Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Natural Environment Research Council: NERC Open Research Archive Antarctic Southern Ocean Indian |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
The Great Calcite Belt (GCB) of the Southern Ocean is a region of elevated summertime upper ocean calcite concentration derived from coccolithophores, despite the region being known for its diatom predominance. The overlap of two major phytoplankton groups, coccolithophores and diatoms, in the dynamic frontal systems characteristic of this region, provides an ideal setting to study environmental influences on the distribution of different species within these taxonomic groups. Water samples for phytoplankton enumeration were collected from the upper 30 m during two cruises, the first to the South Atlantic sector (Jan–Feb 2011; 60 °W–15 °E and 36–60 °S) and the second in the South Indian sector (Feb–Mar 2012; 40–120 °E and 36–60 °S). The species composition of coccolithophores and diatoms was examined using scanning electron microscopy at 27 stations across the Sub-Tropical, Polar, and Sub-Antarctic Fronts. The influence of environmental parameters, such as sea-surface temperature (SST), salinity, carbonate chemistry (i.e., pH, partial pressure of CO2 (pCO2), alkalinity, dissolved inorganic carbon), macro-nutrients (i.e., nitrate + nitrite, phosphate, silicic acid, ammonia), and mixed layer average irradiance, on species composition across the GCB, was assessed statistically. Nanophytoplankton (cells 2–20 μm) were the numerically abundant size group of biomineralizing phytoplankton across the GCB, the coccolithophore Emiliania huxleyi and the diatoms Fragilariopsis nana, F. pseudonana and Pseudonitzschia sp. were the most dominant and widely distributed species. A combination of SST, macro-nutrient concentrations and pCO2 were the best statistical descriptors of biogeographic variability of biomineralizing species composition between stations. Emiliania huxleyi occurred in the silicic acid-depleted waters between the Sub-Antarctic Front and the Polar Front, indicating a favorable environment for this coccolithophore in the GCB after spring diatom blooms remove silicic acid to limiting levels. After full ... |
format |
Article in Journal/Newspaper |
author |
Smith, Helen E.K. Poulton, Alex J. Garley, Rebecca Hopkins, Jason Lubelczyk, Laura C. Drapeau, Dave T. Rauschenberg, Sara Twining, Ben S. Bates, Nicholas R. Balch, William M. |
spellingShingle |
Smith, Helen E.K. Poulton, Alex J. Garley, Rebecca Hopkins, Jason Lubelczyk, Laura C. Drapeau, Dave T. Rauschenberg, Sara Twining, Ben S. Bates, Nicholas R. Balch, William M. The influence of environmental variability on the biogeography of coccolithophores and diatoms in the Great Calcite Belt |
author_facet |
Smith, Helen E.K. Poulton, Alex J. Garley, Rebecca Hopkins, Jason Lubelczyk, Laura C. Drapeau, Dave T. Rauschenberg, Sara Twining, Ben S. Bates, Nicholas R. Balch, William M. |
author_sort |
Smith, Helen E.K. |
title |
The influence of environmental variability on the biogeography of coccolithophores and diatoms in the Great Calcite Belt |
title_short |
The influence of environmental variability on the biogeography of coccolithophores and diatoms in the Great Calcite Belt |
title_full |
The influence of environmental variability on the biogeography of coccolithophores and diatoms in the Great Calcite Belt |
title_fullStr |
The influence of environmental variability on the biogeography of coccolithophores and diatoms in the Great Calcite Belt |
title_full_unstemmed |
The influence of environmental variability on the biogeography of coccolithophores and diatoms in the Great Calcite Belt |
title_sort |
influence of environmental variability on the biogeography of coccolithophores and diatoms in the great calcite belt |
publishDate |
2017 |
url |
http://nora.nerc.ac.uk/id/eprint/516683/ https://nora.nerc.ac.uk/id/eprint/516683/19/bg-14-4905-2017.pdf https://nora.nerc.ac.uk/id/eprint/516683/7/bg-2017-110.pdf https://nora.nerc.ac.uk/id/eprint/516683/8/bg-2017-110-supplement.pdf https://nora.nerc.ac.uk/id/eprint/516683/1/Smith%20et%20al%202017%20GCB%20biogeography.pdf |
geographic |
Antarctic Southern Ocean Indian |
geographic_facet |
Antarctic Southern Ocean Indian |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
https://nora.nerc.ac.uk/id/eprint/516683/19/bg-14-4905-2017.pdf https://nora.nerc.ac.uk/id/eprint/516683/7/bg-2017-110.pdf https://nora.nerc.ac.uk/id/eprint/516683/8/bg-2017-110-supplement.pdf https://nora.nerc.ac.uk/id/eprint/516683/1/Smith%20et%20al%202017%20GCB%20biogeography.pdf Smith, Helen E.K.; Poulton, Alex J.; Garley, Rebecca; Hopkins, Jason; Lubelczyk, Laura C.; Drapeau, Dave T.; Rauschenberg, Sara; Twining, Ben S.; Bates, Nicholas R.; Balch, William M. 2017 The influence of environmental variability on the biogeography of coccolithophores and diatoms in the Great Calcite Belt. Biogeosciences, 14. 4905-4925. https://doi.org/10.5194/bg-2017-110 <https://doi.org/10.5194/bg-2017-110> |
op_rights |
cc_by |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/bg-2017-110 |
_version_ |
1766251655460814848 |