Coccolithophore dynamics in non-bloom conditions during late summer in the central Iceland Basin (July-August 2007)
Measurements of primary production (PP), calcification (CF), and coccolithophore abundance were made during late summer (July–August 2007) in the Iceland Basin. Low numbers of coccolithophore cells and detached coccoliths (, 1 3 103 cells mL21 and 1–15 3 103 coccoliths mL21, respectively) indicated...
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2010
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Online Access: | http://nora.nerc.ac.uk/id/eprint/261281/ https://nora.nerc.ac.uk/id/eprint/261281/1/Poulton_L%26O_Post-print_2010.pdf https://doi.org/10.4319/lo.2010.55.4.1601 |
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ftnerc:oai:nora.nerc.ac.uk:261281 2023-05-15T16:47:18+02:00 Coccolithophore dynamics in non-bloom conditions during late summer in the central Iceland Basin (July-August 2007) Poulton, Alex J. Charalampopoulou, Anastasia Young, Jeremy R. Tarran, Glen A. Lucas, Mike I. Quartly, Graham D. 2010-07 application/pdf http://nora.nerc.ac.uk/id/eprint/261281/ https://nora.nerc.ac.uk/id/eprint/261281/1/Poulton_L%26O_Post-print_2010.pdf https://doi.org/10.4319/lo.2010.55.4.1601 en eng https://nora.nerc.ac.uk/id/eprint/261281/1/Poulton_L%26O_Post-print_2010.pdf Poulton, Alex J.; Charalampopoulou, Anastasia; Young, Jeremy R.; Tarran, Glen A.; Lucas, Mike I.; Quartly, Graham D. 2010 Coccolithophore dynamics in non-bloom conditions during late summer in the central Iceland Basin (July-August 2007). Limnology and Oceanography, 55 (4). 1601-1613. https://doi.org/10.4319/lo.2010.55.4.1601 <https://doi.org/10.4319/lo.2010.55.4.1601> Publication - Article PeerReviewed 2010 ftnerc https://doi.org/10.4319/lo.2010.55.4.1601 2023-02-04T19:35:41Z Measurements of primary production (PP), calcification (CF), and coccolithophore abundance were made during late summer (July–August 2007) in the Iceland Basin. Low numbers of coccolithophore cells and detached coccoliths (, 1 3 103 cells mL21 and 1–15 3 103 coccoliths mL21, respectively) indicated a non-bloom community, with Emiliania huxleyi as the dominant coccolithophore in terms of abundance, coccolithophore organic biomass, and cell calcite. PP ranged from 0.1 to 2 mmol C m23 d21, while CF ranged from 10 to 250 mmol C m23 d21, with both typically decreasing with depth. Coccolithophores were estimated to contribute 10–20% toward total chlorophyll a, phytoplankton carbon, and PP within the euphotic zone. In these non-bloom conditions, , 30–60% of the total calcite in the water column was present as detached coccoliths rather than whole cells. Both cell numbers and variability in cell-normalized CF controlled the magnitude of total CF, and hence both physiological limits to cell CF and growth, as well as mortality factors, need to be taken into account when examining oceanic coccolithophore communities. Combining cell-normalized CF with an estimate of coccolith calcite gave coccolith production rates (0.4–1.8 h21) similar to those reported in the literature for laboratory cultures of E. huxleyi. None of the factors currently associated with coccolithophore blooms (irradiance, mixed-layer depth, nitrate, phosphate, or calcite saturation) showed a clear correlation with community or cellular CF. Hence, although mortality is likely to control cell numbers, other factors such as trace metal (iron) availability may influence coccolithophore physiology in the central Iceland Basin during late summer. Article in Journal/Newspaper Iceland Natural Environment Research Council: NERC Open Research Archive Limnology and Oceanography 55 4 1601 1613 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Measurements of primary production (PP), calcification (CF), and coccolithophore abundance were made during late summer (July–August 2007) in the Iceland Basin. Low numbers of coccolithophore cells and detached coccoliths (, 1 3 103 cells mL21 and 1–15 3 103 coccoliths mL21, respectively) indicated a non-bloom community, with Emiliania huxleyi as the dominant coccolithophore in terms of abundance, coccolithophore organic biomass, and cell calcite. PP ranged from 0.1 to 2 mmol C m23 d21, while CF ranged from 10 to 250 mmol C m23 d21, with both typically decreasing with depth. Coccolithophores were estimated to contribute 10–20% toward total chlorophyll a, phytoplankton carbon, and PP within the euphotic zone. In these non-bloom conditions, , 30–60% of the total calcite in the water column was present as detached coccoliths rather than whole cells. Both cell numbers and variability in cell-normalized CF controlled the magnitude of total CF, and hence both physiological limits to cell CF and growth, as well as mortality factors, need to be taken into account when examining oceanic coccolithophore communities. Combining cell-normalized CF with an estimate of coccolith calcite gave coccolith production rates (0.4–1.8 h21) similar to those reported in the literature for laboratory cultures of E. huxleyi. None of the factors currently associated with coccolithophore blooms (irradiance, mixed-layer depth, nitrate, phosphate, or calcite saturation) showed a clear correlation with community or cellular CF. Hence, although mortality is likely to control cell numbers, other factors such as trace metal (iron) availability may influence coccolithophore physiology in the central Iceland Basin during late summer. |
format |
Article in Journal/Newspaper |
author |
Poulton, Alex J. Charalampopoulou, Anastasia Young, Jeremy R. Tarran, Glen A. Lucas, Mike I. Quartly, Graham D. |
spellingShingle |
Poulton, Alex J. Charalampopoulou, Anastasia Young, Jeremy R. Tarran, Glen A. Lucas, Mike I. Quartly, Graham D. Coccolithophore dynamics in non-bloom conditions during late summer in the central Iceland Basin (July-August 2007) |
author_facet |
Poulton, Alex J. Charalampopoulou, Anastasia Young, Jeremy R. Tarran, Glen A. Lucas, Mike I. Quartly, Graham D. |
author_sort |
Poulton, Alex J. |
title |
Coccolithophore dynamics in non-bloom conditions during late summer in the central Iceland Basin (July-August 2007) |
title_short |
Coccolithophore dynamics in non-bloom conditions during late summer in the central Iceland Basin (July-August 2007) |
title_full |
Coccolithophore dynamics in non-bloom conditions during late summer in the central Iceland Basin (July-August 2007) |
title_fullStr |
Coccolithophore dynamics in non-bloom conditions during late summer in the central Iceland Basin (July-August 2007) |
title_full_unstemmed |
Coccolithophore dynamics in non-bloom conditions during late summer in the central Iceland Basin (July-August 2007) |
title_sort |
coccolithophore dynamics in non-bloom conditions during late summer in the central iceland basin (july-august 2007) |
publishDate |
2010 |
url |
http://nora.nerc.ac.uk/id/eprint/261281/ https://nora.nerc.ac.uk/id/eprint/261281/1/Poulton_L%26O_Post-print_2010.pdf https://doi.org/10.4319/lo.2010.55.4.1601 |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
https://nora.nerc.ac.uk/id/eprint/261281/1/Poulton_L%26O_Post-print_2010.pdf Poulton, Alex J.; Charalampopoulou, Anastasia; Young, Jeremy R.; Tarran, Glen A.; Lucas, Mike I.; Quartly, Graham D. 2010 Coccolithophore dynamics in non-bloom conditions during late summer in the central Iceland Basin (July-August 2007). Limnology and Oceanography, 55 (4). 1601-1613. https://doi.org/10.4319/lo.2010.55.4.1601 <https://doi.org/10.4319/lo.2010.55.4.1601> |
op_doi |
https://doi.org/10.4319/lo.2010.55.4.1601 |
container_title |
Limnology and Oceanography |
container_volume |
55 |
container_issue |
4 |
container_start_page |
1601 |
op_container_end_page |
1613 |
_version_ |
1766037385984868352 |