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Lack of impact of the El Hierro (Canary Islands) submarine volcanic eruption on the local phytoplankton community
Gómez-Letona, M.; Arístegui, J.; Ramos, A.G.; Montero, M.F.; Coca, J. (2018). Lack of impact of the El Hierro (Canary Islands) submarine volcanic eruption on the local phytoplankton community. NPG Scientific Reports 8(1): 12 pp. https://dx.doi.org/10.1038/s41598-018-22967-6
In: Scientific Reports (Nature Publishing Group). Nature Publishing Group: London. ISSN 2045-2322; e-ISSN 2045-2322
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| Auteurs | | Top |
- Gómez-Letona, M.
- Arístegui, J.
- Ramos, A.G.
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| Abstract |
The eruption of a submarine volcano south of El Hierro Island (Canary Islands) in October 2011 led to major physical and chemical changes in the local environment. Large amounts of nutrients were found at specific depths in the water column above the volcano associated with suboxic layers resulting from the oxidation of reduced chemical species expelled during the eruptive phase. It has been suggested that the fertilization with these compounds enabled the rapid restoration of the ecosystem in the marine reserve south of the island once the volcanic activity ceased, although no biological evidence for this has been provided yet. To test the biological fertilization hypothesis on the pelagic ecosystem, we studied the evolution and variability in chlorophyll a, from in situ and remote sensing data, combined with information on phytoplankton and bacterial community structure during and after the eruptive episode. Remote sensing and in situ data revealed that no phytoplankton bloom took place neither during nor after the eruptive episode. We hypothesize that the fertilization by the volcano did not have an effect in the phytoplankton community due to the strong dilution of macro- and micronutrients caused by the efficient renewal of ambient waters in the zone. |
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