{"id":23753,"date":"2025-11-03T16:00:04","date_gmt":"2025-11-03T15:00:04","guid":{"rendered":"https:\/\/www.mio.osupytheas.fr\/?p=23753"},"modified":"2025-11-03T16:19:13","modified_gmt":"2025-11-03T15:19:13","slug":"cpublie-natalia-torres-rodriguez-natural-iron-fertilization-moderates-hydrothermal","status":"publish","type":"post","link":"https:\/\/www.mio.osupytheas.fr\/en\/cpublie-natalia-torres-rodriguez-natural-iron-fertilization-moderates-hydrothermal\/","title":{"rendered":"Cpublished | Natalia Torres-Rodriguez: Natural Iron Fertilization Moderates Hydrothermal"},"content":{"rendered":"
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IMBE TV<\/strong><\/a> has created and recently posted, in the Cpubli\u00e9 serie<\/em>, two videos (one in French, the other in English), relating to the recent publication by Natalia Torres-Rodriguez (MIO) :\u00a0 Natural Iron Fertilization Moderates Hydrothermal Mercury Inputs<\/em>from Arc Volcanoes<\/em>.<\/p>

Methylmercury is a bioaccumulative neurotoxin that poses severe risks to marine ecosystems and human health worldwide. Hydrothermal systems and submarine volcanoes are natural sources of mercury, yet the magnitude of emissions, their transport, and their impact on marine ecosystems remain poorly understood. Quantifying natural mercury fluxes is essential to understanding anthropogenic perturbations and guiding effective reduction strategies. We investigate hydrothermal mercury inputs at the Tonga volcanic arc and their impact on the local ecosystem. Our results show that hydrothermal and volcanic activity in the Tonga Arc increases mercury concentrations in seawater. Comprehensive surveys identified mercury-rich plumes (up to 22.7 pmol L\u22121) associated with high mercury fluxes (4763 pmol m\u22122 day\u22121) reaching productive surface waters, resulting in an estimated total flux of 4.23 t y\u22121 for the entire Tonga Arc. Despite these significant inputs, mercury concentrations in phytoplankton remain unexpectedly low. We demonstrate that phytoplankton blooms, stimulated by natural iron fertilization from hydrothermal sources, dilute mercury at the cellular level, reducing the impact of hydrothermal mercury. Additionally, we provide a revised global estimate of hydrothermal mercury inputs with a maximum of 120 t y\u22121, which is considerably lower than atmospheric and riverine inputs to the ocean.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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IMBE TV a cr\u00e9\u00e9 et r\u00e9cemment mis en ligne, dans la s\u00e9rie Cpubli\u00e9, deux vid\u00e9os (l’une en fran\u00e7ais, l’autre en anglais) relatives \u00e0 la r\u00e9cente publication de Natalia Torres-Rodriguez (MIO) […]<\/p>\n","protected":false},"author":319,"featured_media":23754,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[17,1,27],"tags":[],"class_list":["post-23753","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-a-la-une","category-actualites","category-mediation-scientifique"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/posts\/23753","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/users\/319"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/comments?post=23753"}],"version-history":[{"count":7,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/posts\/23753\/revisions"}],"predecessor-version":[{"id":23762,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/posts\/23753\/revisions\/23762"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/media\/23754"}],"wp:attachment":[{"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/media?parent=23753"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/categories?post=23753"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/tags?post=23753"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}