Phytoplanktonic response to simulated volcanic and desert dust deposition events in the South Indian and Southern Oceans
Contrasting concentrations of macronutrients and micronutrients induce different nutrient limitations of the oceanic productivity and shape the composition of the phytoplankton communities of the South Indian Ocean and Indian sector of the Southern Ocean. o assess the phytoplankton response to nutri...
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Online Access: | http://hdl.handle.net/2078.1/261071 https://doi.org/10.1002/lno.12100 |
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ftunivlouvain:oai:dial.uclouvain.be:boreal:261071 2024-05-12T08:11:28+00:00 Phytoplanktonic response to simulated volcanic and desert dust deposition events in the South Indian and Southern Oceans Geisen G, Ridame C, Journet E, Delmelle P, Marie D, Lo Monaco C, Metzl N, Ammar R, Komb J UCL - SST/ELI - Earth and Life Institute 2022 http://hdl.handle.net/2078.1/261071 https://doi.org/10.1002/lno.12100 eng eng Wiley periodicals boreal:261071 http://hdl.handle.net/2078.1/261071 doi:10.1002/lno.12100 info:eu-repo/semantics/openAccess Limnology and Oceanography, Vol. 9999, no.1, p. 1-17 (2022) phytoplankton volcanic ash ocean iron info:eu-repo/semantics/article 2022 ftunivlouvain https://doi.org/10.1002/lno.12100 2024-04-17T16:35:00Z Contrasting concentrations of macronutrients and micronutrients induce different nutrient limitations of the oceanic productivity and shape the composition of the phytoplankton communities of the South Indian Ocean and Indian sector of the Southern Ocean. o assess the phytoplankton response to nutrient release by desert dust and volcanic ash aerosols in these distinct biogeochemical regions, we conducted microcosm incubation experiments. A dry or wet deposition of either dust from Patagonia or ash from the Icelandic volcano Eyjafjallajökull or dissolved nutrients (Si, Fe, N and/or P) were added to trace metal clean incubations of surface seawater collected from five stations. These deposition experiments enabled the measurement of the biological response along with solubility calculations of nutrients. Both types of aerosols alleviated the iron deficiency occurring in the Southern Ocean during austral summer and resulted in a 24–110% enhancement of the primary production, depending on the station. The release of dissolved silicon may also have contributed to this response, although to a lesser extent, whereas neither the dust nor the ash relieved the nitrogen limitation in the low-nutrient and low-chlorophyll area. Diatom growth was responsible for 40% to 100% of the algal biomass increase within the responding stations, depending on the region and aerosol type. The high particle concentrations that are characteristic of ash deposition following volcanic eruptions may be of equal or higher importance to phytoplankton compared to desert dust, despite ashes' lower nutrient solubility to the ocean. Article in Journal/Newspaper Southern Ocean DIAL@UCLouvain (Université catholique de Louvain) Austral Indian Patagonia Southern Ocean Limnology and Oceanography |
institution |
Open Polar |
collection |
DIAL@UCLouvain (Université catholique de Louvain) |
op_collection_id |
ftunivlouvain |
language |
English |
topic |
phytoplankton volcanic ash ocean iron |
spellingShingle |
phytoplankton volcanic ash ocean iron Geisen G, Ridame C, Journet E, Delmelle P, Marie D, Lo Monaco C, Metzl N, Ammar R, Komb J Phytoplanktonic response to simulated volcanic and desert dust deposition events in the South Indian and Southern Oceans |
topic_facet |
phytoplankton volcanic ash ocean iron |
description |
Contrasting concentrations of macronutrients and micronutrients induce different nutrient limitations of the oceanic productivity and shape the composition of the phytoplankton communities of the South Indian Ocean and Indian sector of the Southern Ocean. o assess the phytoplankton response to nutrient release by desert dust and volcanic ash aerosols in these distinct biogeochemical regions, we conducted microcosm incubation experiments. A dry or wet deposition of either dust from Patagonia or ash from the Icelandic volcano Eyjafjallajökull or dissolved nutrients (Si, Fe, N and/or P) were added to trace metal clean incubations of surface seawater collected from five stations. These deposition experiments enabled the measurement of the biological response along with solubility calculations of nutrients. Both types of aerosols alleviated the iron deficiency occurring in the Southern Ocean during austral summer and resulted in a 24–110% enhancement of the primary production, depending on the station. The release of dissolved silicon may also have contributed to this response, although to a lesser extent, whereas neither the dust nor the ash relieved the nitrogen limitation in the low-nutrient and low-chlorophyll area. Diatom growth was responsible for 40% to 100% of the algal biomass increase within the responding stations, depending on the region and aerosol type. The high particle concentrations that are characteristic of ash deposition following volcanic eruptions may be of equal or higher importance to phytoplankton compared to desert dust, despite ashes' lower nutrient solubility to the ocean. |
author2 |
UCL - SST/ELI - Earth and Life Institute |
format |
Article in Journal/Newspaper |
author |
Geisen G, Ridame C, Journet E, Delmelle P, Marie D, Lo Monaco C, Metzl N, Ammar R, Komb J |
author_facet |
Geisen G, Ridame C, Journet E, Delmelle P, Marie D, Lo Monaco C, Metzl N, Ammar R, Komb J |
author_sort |
Geisen G, Ridame C, Journet E, Delmelle P, Marie D, Lo Monaco C, Metzl N, Ammar R, Komb J |
title |
Phytoplanktonic response to simulated volcanic and desert dust deposition events in the South Indian and Southern Oceans |
title_short |
Phytoplanktonic response to simulated volcanic and desert dust deposition events in the South Indian and Southern Oceans |
title_full |
Phytoplanktonic response to simulated volcanic and desert dust deposition events in the South Indian and Southern Oceans |
title_fullStr |
Phytoplanktonic response to simulated volcanic and desert dust deposition events in the South Indian and Southern Oceans |
title_full_unstemmed |
Phytoplanktonic response to simulated volcanic and desert dust deposition events in the South Indian and Southern Oceans |
title_sort |
phytoplanktonic response to simulated volcanic and desert dust deposition events in the south indian and southern oceans |
publisher |
Wiley periodicals |
publishDate |
2022 |
url |
http://hdl.handle.net/2078.1/261071 https://doi.org/10.1002/lno.12100 |
geographic |
Austral Indian Patagonia Southern Ocean |
geographic_facet |
Austral Indian Patagonia Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Limnology and Oceanography, Vol. 9999, no.1, p. 1-17 (2022) |
op_relation |
boreal:261071 http://hdl.handle.net/2078.1/261071 doi:10.1002/lno.12100 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/lno.12100 |
container_title |
Limnology and Oceanography |
_version_ |
1798855200735232000 |