Intertidal geothermal hot springs as a source of trace elements to the coastal zone: A case study from Bahía Concepción, Gulf of California

María Luisa Leal-Acosta, Evgueni Shumilin, Nicolai Mirlean, Elena Lounejeva Baturina, Ignacio Sánchez-Rodríguez, Francisco Delgadillo-Hinojosa, José Borges-Souza

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Abstract

© 2018 Elsevier Ltd We investigated the influence of the intertidal geothermal hot spring (GHS) on the biogeochemistry of trace elements in Santispac Bight, Bahía Concepción (Gulf of California). The geothermal fluids were enriched in As and Hg mainly in ionic form. The suspended particulate matter of the GHS had elevated enrichment factor (EF) > 1 of As, Bi, Cd, Co, Cu, Mn, Mo, Sb, Sn, Sr, Ti, U and Zn. The sediment core from GHS1 had high concentration of As, Hg, Corg, S, V, Mo, and U and the extremely high EF of these elements at 8 cm of the core. The maximum bioaccumulation of As and Hg was in seaweeds Sargassum sinicola collected near the GHS2. The results confirm the input of trace elements to the coastal zone in Bahía Concepción from geothermal fluids and the evident modification of the chemical composition of the adjacent marine environment.
Original languageAmerican English
Pages (from-to)51-64
Number of pages44
JournalMarine Pollution Bulletin
DOIs
StatePublished - 1 Mar 2018
Externally publishedYes

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