Effects of Iron, Silicate, and Light on Dimethylsulfoniopropionate Production in the Australian Subantarctic Zone
Shipboard bottle incubation experiments were performed to investigate the effects of iron, light, and silicate on algal production of particulate dimethylsulfoniopropionate (DMSPp) in the Subantarctic Zone (SAZ) south of Tasmania during March 1998. Iron enrichment resulted in threefold to ninefold i...
Published in: | Journal of Geophysical Research: Oceans |
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2001
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ftolddominionuni:oai:digitalcommons.odu.edu:oeas_fac_pubs-1105 2023-06-11T04:07:05+02:00 Effects of Iron, Silicate, and Light on Dimethylsulfoniopropionate Production in the Australian Subantarctic Zone DiTullio, G. R. Sedwick, P. N. Jones, D. R. Boyd, P. W. Crossley, A. C. Hutchins, D. A. 2001-01-01T08:00:00Z application/pdf https://digitalcommons.odu.edu/oeas_fac_pubs/90 https://doi.org/10.1029/2000jc000446 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1105/viewcontent/DiTullio_2001_Effects_of_iron__silicate__and_l.pdf unknown ODU Digital Commons https://digitalcommons.odu.edu/oeas_fac_pubs/90 doi:10.1029/2000jc000446 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1105/viewcontent/DiTullio_2001_Effects_of_iron__silicate__and_l.pdf OES Faculty Publications Southern Ocean Dimethyl sulfide Ross Sea Phytoplankton growth Phaeocystis antarctica Marine phytoplankton Atmospheric sulfur Cloud Albedo Carbon Bloom Biochemistry Biogeochemistry Marine Biology Oceanography article 2001 ftolddominionuni https://doi.org/10.1029/2000jc000446 2023-05-08T17:59:38Z Shipboard bottle incubation experiments were performed to investigate the effects of iron, light, and silicate on algal production of particulate dimethylsulfoniopropionate (DMSPp) in the Subantarctic Zone (SAZ) south of Tasmania during March 1998. Iron enrichment resulted in threefold to ninefold increases in DMSPp concentrations relative to control treatments, following 7 and 8-day incubation experiments. Additions of Fe and Si preferentially stimulated the growth of lightly-silicified pennate diatoms and siliceous haptophytes, respectively, to which we attribute the increased DMSPp production in the incubation bottles. Both of these algal groups were previously believed to be low DMSPp producers; however, our experimental data suggest that addition of iron and silicate to the low-silicate low-iron waters of the SAZ will result in increased production of DMSPp by lightly silicified diatoms and siliceous haptophytes, respectively. Increased irradiance enhanced DMSPp production in iron-amended treatments with both low (0.5 nM) and high (5 nM) concentrations of added iron. However, the role of light in stimulating DMSPp production was apparently of secondary importance compared to the effects of iron addition. The combination of high irradiance and high iron enrichment produced the highest DMSPp production in the experiments, suggesting that iron and light may have a synergistic effect in limiting algal DMSPp production in subantarctic waters. Article in Journal/Newspaper Antarc* Antarctica Ross Sea Southern Ocean Old Dominion University: ODU Digital Commons Southern Ocean Ross Sea Journal of Geophysical Research: Oceans 106 C12 31585 31595 |
institution |
Open Polar |
collection |
Old Dominion University: ODU Digital Commons |
op_collection_id |
ftolddominionuni |
language |
unknown |
topic |
Southern Ocean Dimethyl sulfide Ross Sea Phytoplankton growth Phaeocystis antarctica Marine phytoplankton Atmospheric sulfur Cloud Albedo Carbon Bloom Biochemistry Biogeochemistry Marine Biology Oceanography |
spellingShingle |
Southern Ocean Dimethyl sulfide Ross Sea Phytoplankton growth Phaeocystis antarctica Marine phytoplankton Atmospheric sulfur Cloud Albedo Carbon Bloom Biochemistry Biogeochemistry Marine Biology Oceanography DiTullio, G. R. Sedwick, P. N. Jones, D. R. Boyd, P. W. Crossley, A. C. Hutchins, D. A. Effects of Iron, Silicate, and Light on Dimethylsulfoniopropionate Production in the Australian Subantarctic Zone |
topic_facet |
Southern Ocean Dimethyl sulfide Ross Sea Phytoplankton growth Phaeocystis antarctica Marine phytoplankton Atmospheric sulfur Cloud Albedo Carbon Bloom Biochemistry Biogeochemistry Marine Biology Oceanography |
description |
Shipboard bottle incubation experiments were performed to investigate the effects of iron, light, and silicate on algal production of particulate dimethylsulfoniopropionate (DMSPp) in the Subantarctic Zone (SAZ) south of Tasmania during March 1998. Iron enrichment resulted in threefold to ninefold increases in DMSPp concentrations relative to control treatments, following 7 and 8-day incubation experiments. Additions of Fe and Si preferentially stimulated the growth of lightly-silicified pennate diatoms and siliceous haptophytes, respectively, to which we attribute the increased DMSPp production in the incubation bottles. Both of these algal groups were previously believed to be low DMSPp producers; however, our experimental data suggest that addition of iron and silicate to the low-silicate low-iron waters of the SAZ will result in increased production of DMSPp by lightly silicified diatoms and siliceous haptophytes, respectively. Increased irradiance enhanced DMSPp production in iron-amended treatments with both low (0.5 nM) and high (5 nM) concentrations of added iron. However, the role of light in stimulating DMSPp production was apparently of secondary importance compared to the effects of iron addition. The combination of high irradiance and high iron enrichment produced the highest DMSPp production in the experiments, suggesting that iron and light may have a synergistic effect in limiting algal DMSPp production in subantarctic waters. |
format |
Article in Journal/Newspaper |
author |
DiTullio, G. R. Sedwick, P. N. Jones, D. R. Boyd, P. W. Crossley, A. C. Hutchins, D. A. |
author_facet |
DiTullio, G. R. Sedwick, P. N. Jones, D. R. Boyd, P. W. Crossley, A. C. Hutchins, D. A. |
author_sort |
DiTullio, G. R. |
title |
Effects of Iron, Silicate, and Light on Dimethylsulfoniopropionate Production in the Australian Subantarctic Zone |
title_short |
Effects of Iron, Silicate, and Light on Dimethylsulfoniopropionate Production in the Australian Subantarctic Zone |
title_full |
Effects of Iron, Silicate, and Light on Dimethylsulfoniopropionate Production in the Australian Subantarctic Zone |
title_fullStr |
Effects of Iron, Silicate, and Light on Dimethylsulfoniopropionate Production in the Australian Subantarctic Zone |
title_full_unstemmed |
Effects of Iron, Silicate, and Light on Dimethylsulfoniopropionate Production in the Australian Subantarctic Zone |
title_sort |
effects of iron, silicate, and light on dimethylsulfoniopropionate production in the australian subantarctic zone |
publisher |
ODU Digital Commons |
publishDate |
2001 |
url |
https://digitalcommons.odu.edu/oeas_fac_pubs/90 https://doi.org/10.1029/2000jc000446 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1105/viewcontent/DiTullio_2001_Effects_of_iron__silicate__and_l.pdf |
geographic |
Southern Ocean Ross Sea |
geographic_facet |
Southern Ocean Ross Sea |
genre |
Antarc* Antarctica Ross Sea Southern Ocean |
genre_facet |
Antarc* Antarctica Ross Sea Southern Ocean |
op_source |
OES Faculty Publications |
op_relation |
https://digitalcommons.odu.edu/oeas_fac_pubs/90 doi:10.1029/2000jc000446 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1105/viewcontent/DiTullio_2001_Effects_of_iron__silicate__and_l.pdf |
op_doi |
https://doi.org/10.1029/2000jc000446 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
106 |
container_issue |
C12 |
container_start_page |
31585 |
op_container_end_page |
31595 |
_version_ |
1768379678574247936 |