The cadmium-phosphate relationship in brine: biological versus physical control over micronutrients in sea ice environments
Despite supporting productive ecosystems in the high latitudes, the relationship between macro- and micronutrients in sea ice environments and their impact on surface productivity is poorly documented. In seawater, the macronutrient phosphate and the micronutrient cadmium follow similar distribution...
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Cambridge University Press
2010
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ftunivcardiff:oai:https://orca.cardiff.ac.uk:7522 2023-05-15T13:46:03+02:00 The cadmium-phosphate relationship in brine: biological versus physical control over micronutrients in sea ice environments Hendry, Katharine Rosemary Rickaby, Rosalind E. M. De Hoog, Jan C. M. Weston, Keith Rehkamper, Mark 2010-02 application/pdf https://orca.cardiff.ac.uk/id/eprint/7522/ https://doi.org/10.1017/S0954102009990381 https://orca.cardiff.ac.uk/id/eprint/7522/1/Hendry%202010.pdf en eng Cambridge University Press https://orca.cardiff.ac.uk/id/eprint/7522/1/Hendry%202010.pdf Hendry, Katharine Rosemary, Rickaby, Rosalind E. M., De Hoog, Jan C. M., Weston, Keith and Rehkamper, Mark 2010. The cadmium-phosphate relationship in brine: biological versus physical control over micronutrients in sea ice environments. Antarctic Science 22 (1) , pp. 11-18. 10.1017/S0954102009990381 https://doi.org/10.1017/S0954102009990381 file https://orca.cardiff.ac.uk/7522/1/Hendry%202010.pdf doi:10.1017/S0954102009990381 GC Oceanography Article PeerReviewed 2010 ftunivcardiff https://doi.org/10.1017/S0954102009990381 2022-09-25T20:16:07Z Despite supporting productive ecosystems in the high latitudes, the relationship between macro- and micronutrients in sea ice environments and their impact on surface productivity is poorly documented. In seawater, the macronutrient phosphate and the micronutrient cadmium follow similar distributions, which are controlled by biological processes in surface waters. We investigated cadmium and phosphate in sea ice brine, and the biological and physical processes controlling their distribution. Cadmium concentrations in sea ice brine ranged from 0.09–2.4 nmol kg-1, and correlated well with salinity. Our results show that micronutrients in sea ice are most probably sourced from the seawater from which it froze rather than external sources such as atmospheric deposition. The weak correlation between sea ice cadmium and phosphate, and the positive relationship between cadmium and biomass, suggests against biological uptake being a principal control over micronutrient distribution even in a highly productive setting. Instead, brine expulsion and dilution play a dominant role in cadmium distribution in sea ice. Nutrient dilution within brine channels during melting, and contrasting sea ice and open water phytoplankton populations, suggests that late spring sea ice is not a significant source of nutrients or biomass to seawater. We suggest that future changes in sea ice seasonality may impact nutrient distribution and Antarctic marine ecosystems. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Sea ice Cardiff University: ORCA (Online Research @ Cardiff) Antarctic Antarctic Science 22 01 11 |
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Open Polar |
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Cardiff University: ORCA (Online Research @ Cardiff) |
op_collection_id |
ftunivcardiff |
language |
English |
topic |
GC Oceanography |
spellingShingle |
GC Oceanography Hendry, Katharine Rosemary Rickaby, Rosalind E. M. De Hoog, Jan C. M. Weston, Keith Rehkamper, Mark The cadmium-phosphate relationship in brine: biological versus physical control over micronutrients in sea ice environments |
topic_facet |
GC Oceanography |
description |
Despite supporting productive ecosystems in the high latitudes, the relationship between macro- and micronutrients in sea ice environments and their impact on surface productivity is poorly documented. In seawater, the macronutrient phosphate and the micronutrient cadmium follow similar distributions, which are controlled by biological processes in surface waters. We investigated cadmium and phosphate in sea ice brine, and the biological and physical processes controlling their distribution. Cadmium concentrations in sea ice brine ranged from 0.09–2.4 nmol kg-1, and correlated well with salinity. Our results show that micronutrients in sea ice are most probably sourced from the seawater from which it froze rather than external sources such as atmospheric deposition. The weak correlation between sea ice cadmium and phosphate, and the positive relationship between cadmium and biomass, suggests against biological uptake being a principal control over micronutrient distribution even in a highly productive setting. Instead, brine expulsion and dilution play a dominant role in cadmium distribution in sea ice. Nutrient dilution within brine channels during melting, and contrasting sea ice and open water phytoplankton populations, suggests that late spring sea ice is not a significant source of nutrients or biomass to seawater. We suggest that future changes in sea ice seasonality may impact nutrient distribution and Antarctic marine ecosystems. |
format |
Article in Journal/Newspaper |
author |
Hendry, Katharine Rosemary Rickaby, Rosalind E. M. De Hoog, Jan C. M. Weston, Keith Rehkamper, Mark |
author_facet |
Hendry, Katharine Rosemary Rickaby, Rosalind E. M. De Hoog, Jan C. M. Weston, Keith Rehkamper, Mark |
author_sort |
Hendry, Katharine Rosemary |
title |
The cadmium-phosphate relationship in brine: biological versus physical control over micronutrients in sea ice environments |
title_short |
The cadmium-phosphate relationship in brine: biological versus physical control over micronutrients in sea ice environments |
title_full |
The cadmium-phosphate relationship in brine: biological versus physical control over micronutrients in sea ice environments |
title_fullStr |
The cadmium-phosphate relationship in brine: biological versus physical control over micronutrients in sea ice environments |
title_full_unstemmed |
The cadmium-phosphate relationship in brine: biological versus physical control over micronutrients in sea ice environments |
title_sort |
cadmium-phosphate relationship in brine: biological versus physical control over micronutrients in sea ice environments |
publisher |
Cambridge University Press |
publishDate |
2010 |
url |
https://orca.cardiff.ac.uk/id/eprint/7522/ https://doi.org/10.1017/S0954102009990381 https://orca.cardiff.ac.uk/id/eprint/7522/1/Hendry%202010.pdf |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctic Science Sea ice |
genre_facet |
Antarc* Antarctic Antarctic Science Sea ice |
op_relation |
https://orca.cardiff.ac.uk/id/eprint/7522/1/Hendry%202010.pdf Hendry, Katharine Rosemary, Rickaby, Rosalind E. M., De Hoog, Jan C. M., Weston, Keith and Rehkamper, Mark 2010. The cadmium-phosphate relationship in brine: biological versus physical control over micronutrients in sea ice environments. Antarctic Science 22 (1) , pp. 11-18. 10.1017/S0954102009990381 https://doi.org/10.1017/S0954102009990381 file https://orca.cardiff.ac.uk/7522/1/Hendry%202010.pdf doi:10.1017/S0954102009990381 |
op_doi |
https://doi.org/10.1017/S0954102009990381 |
container_title |
Antarctic Science |
container_volume |
22 |
container_issue |
01 |
container_start_page |
11 |
_version_ |
1766235421876944896 |