Geochemical evidence of oceanic iron fertilization by the kasatochi volcanic eruption in 2008 and the potential impacts on pacific sockeye salmon
The Kasatochi volcanic eruption that occurred in the central Aleutian Islands in Alaska, USA, in August 2008 is thought to have induced a massive diatom bloom in the iron-limited waters of the Gulf of Alaska, which potentially affected the oceanic food web by increasing the abundance of zooplankton...
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ftnuigalway:oai:https://researchrepository.universityofgalway.ie:10379/13344 2024-09-30T14:31:26+00:00 Geochemical evidence of oceanic iron fertilization by the kasatochi volcanic eruption in 2008 and the potential impacts on pacific sockeye salmon Olgun, N Duggen, S Langmann, B Hort, M Waythomas, CF Hoffmann, L Croot, P 2013-08-15 http://hdl.handle.net/10379/13344 https://doi.org/10.13025/26712 https://doi.org/10.3354/meps10403 unknown Inter-Research Science Center Marine Ecology Progress Series Olgun, N; Duggen, S; Langmann, B; Hort, M; Waythomas, CF; Hoffmann, L; Croot, P (2013). Geochemical evidence of oceanic iron fertilization by the kasatochi volcanic eruption in 2008 and the potential impacts on pacific sockeye salmon. Marine Ecology Progress Series 488 , 81-88 0171-8630,1616-1599 http://hdl.handle.net/10379/13344 https://doi.org/10.13025/26712 doi:10.3354/meps10403 Attribution-NonCommercial-NoDerivs 3.0 Ireland https://creativecommons.org/licenses/by-nc-nd/3.0/ie/ kasatochi eruption volcanic ash fe limitation diatom bloom gulf of alaska sockeye salmon sub-arctic pacific oncorhynchus-nerka fraser-river enrichment experiments primary productivity marine growth surface ocean hnlc waters ne pacific ash Article 2013 ftnuigalway https://doi.org/10.13025/2671210.3354/meps10403 2024-09-17T14:44:29Z The Kasatochi volcanic eruption that occurred in the central Aleutian Islands in Alaska, USA, in August 2008 is thought to have induced a massive diatom bloom in the iron-limited waters of the Gulf of Alaska, which potentially affected the oceanic food web by increasing the abundance of zooplankton and sockeye salmon Oncorhynchus nerka in the northeast Pacific Ocean. We report the first seawater experiments involving volcanic ash ejected from the Kasatochi eruption, showing that the ash released 61 to 83 nmol Fe, 374 to 410 nmol NO3-, 5 to 6 nmol PO43- and 170 to 585 nmol SiO2 when it contacted seawater. Our study suggests that the amount of iron released from Kasatochi ash (an increase of 2.0 to 2.8 nM Fe) was indeed sufficient to cause the observed phytoplankton bloom in the northeastern Pacific Gyre, while the impact of macronutrient release was minimal. We further evaluated the multiple, interdependent processes in the oceanic food web related to the diatom bloom, involving the ocean survival of juvenile salmon that entered the northeast Pacific Ocean in the summer of 2008. Article in Journal/Newspaper Arctic Phytoplankton Zooplankton Alaska Aleutian Islands National University of Ireland (NUI), Galway: ARAN Arctic Fraser River ENVELOPE(-62.243,-62.243,56.619,56.619) Gulf of Alaska Pacific Sockeye ENVELOPE(-130.143,-130.143,54.160,54.160) |
institution |
Open Polar |
collection |
National University of Ireland (NUI), Galway: ARAN |
op_collection_id |
ftnuigalway |
language |
unknown |
topic |
kasatochi eruption volcanic ash fe limitation diatom bloom gulf of alaska sockeye salmon sub-arctic pacific oncorhynchus-nerka fraser-river enrichment experiments primary productivity marine growth surface ocean hnlc waters ne pacific ash |
spellingShingle |
kasatochi eruption volcanic ash fe limitation diatom bloom gulf of alaska sockeye salmon sub-arctic pacific oncorhynchus-nerka fraser-river enrichment experiments primary productivity marine growth surface ocean hnlc waters ne pacific ash Olgun, N Duggen, S Langmann, B Hort, M Waythomas, CF Hoffmann, L Croot, P Geochemical evidence of oceanic iron fertilization by the kasatochi volcanic eruption in 2008 and the potential impacts on pacific sockeye salmon |
topic_facet |
kasatochi eruption volcanic ash fe limitation diatom bloom gulf of alaska sockeye salmon sub-arctic pacific oncorhynchus-nerka fraser-river enrichment experiments primary productivity marine growth surface ocean hnlc waters ne pacific ash |
description |
The Kasatochi volcanic eruption that occurred in the central Aleutian Islands in Alaska, USA, in August 2008 is thought to have induced a massive diatom bloom in the iron-limited waters of the Gulf of Alaska, which potentially affected the oceanic food web by increasing the abundance of zooplankton and sockeye salmon Oncorhynchus nerka in the northeast Pacific Ocean. We report the first seawater experiments involving volcanic ash ejected from the Kasatochi eruption, showing that the ash released 61 to 83 nmol Fe, 374 to 410 nmol NO3-, 5 to 6 nmol PO43- and 170 to 585 nmol SiO2 when it contacted seawater. Our study suggests that the amount of iron released from Kasatochi ash (an increase of 2.0 to 2.8 nM Fe) was indeed sufficient to cause the observed phytoplankton bloom in the northeastern Pacific Gyre, while the impact of macronutrient release was minimal. We further evaluated the multiple, interdependent processes in the oceanic food web related to the diatom bloom, involving the ocean survival of juvenile salmon that entered the northeast Pacific Ocean in the summer of 2008. |
format |
Article in Journal/Newspaper |
author |
Olgun, N Duggen, S Langmann, B Hort, M Waythomas, CF Hoffmann, L Croot, P |
author_facet |
Olgun, N Duggen, S Langmann, B Hort, M Waythomas, CF Hoffmann, L Croot, P |
author_sort |
Olgun, N |
title |
Geochemical evidence of oceanic iron fertilization by the kasatochi volcanic eruption in 2008 and the potential impacts on pacific sockeye salmon |
title_short |
Geochemical evidence of oceanic iron fertilization by the kasatochi volcanic eruption in 2008 and the potential impacts on pacific sockeye salmon |
title_full |
Geochemical evidence of oceanic iron fertilization by the kasatochi volcanic eruption in 2008 and the potential impacts on pacific sockeye salmon |
title_fullStr |
Geochemical evidence of oceanic iron fertilization by the kasatochi volcanic eruption in 2008 and the potential impacts on pacific sockeye salmon |
title_full_unstemmed |
Geochemical evidence of oceanic iron fertilization by the kasatochi volcanic eruption in 2008 and the potential impacts on pacific sockeye salmon |
title_sort |
geochemical evidence of oceanic iron fertilization by the kasatochi volcanic eruption in 2008 and the potential impacts on pacific sockeye salmon |
publisher |
Inter-Research Science Center |
publishDate |
2013 |
url |
http://hdl.handle.net/10379/13344 https://doi.org/10.13025/26712 https://doi.org/10.3354/meps10403 |
long_lat |
ENVELOPE(-62.243,-62.243,56.619,56.619) ENVELOPE(-130.143,-130.143,54.160,54.160) |
geographic |
Arctic Fraser River Gulf of Alaska Pacific Sockeye |
geographic_facet |
Arctic Fraser River Gulf of Alaska Pacific Sockeye |
genre |
Arctic Phytoplankton Zooplankton Alaska Aleutian Islands |
genre_facet |
Arctic Phytoplankton Zooplankton Alaska Aleutian Islands |
op_relation |
Marine Ecology Progress Series Olgun, N; Duggen, S; Langmann, B; Hort, M; Waythomas, CF; Hoffmann, L; Croot, P (2013). Geochemical evidence of oceanic iron fertilization by the kasatochi volcanic eruption in 2008 and the potential impacts on pacific sockeye salmon. Marine Ecology Progress Series 488 , 81-88 0171-8630,1616-1599 http://hdl.handle.net/10379/13344 https://doi.org/10.13025/26712 doi:10.3354/meps10403 |
op_rights |
Attribution-NonCommercial-NoDerivs 3.0 Ireland https://creativecommons.org/licenses/by-nc-nd/3.0/ie/ |
op_doi |
https://doi.org/10.13025/2671210.3354/meps10403 |
_version_ |
1811635986371706880 |