Review
Environmental Sciences
Teresa Radziejewska, Magdalena Blazewicz, Maria Wlodarska-Kowalczuk, Piotr Jozwiak, Krzysztof Pabis, Jan Marcin Weslawski
Summary: In February 2018, the Government of Poland and the International Seabed Authority signed a 15-year contract for exploration of polymetallic sulfide deposits. The exploration will focus on benthic communities in the contract area, with special attention given to potential knowledge gaps and the unique Lost City hydrothermal field. Significant efforts will be needed to address these gaps during exploration surveys.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Multidisciplinary Sciences
Meng Ma, Li Zheng, Xiaofei Yin, Wei Gao, Bin Han, Qian Li, Aimei Zhu, Hao Chen, Huanghao Yang
Summary: Sediments from the deep-sea hydrothermal region of the South Atlantic Ocean were collected, from which microbial enrichment cultures capable of degrading petroleum hydrocarbons were identified. Dominant oil-degrading bacteria from this region belonged to genera Pseudomonas, Nitratireductor, Acinetobacter, and Brevundimonas. Consortium H, constructed from selected strains, demonstrated high oil-degrading efficiency and potential application prospects for oil pollution bioremediation.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Physical
Valentine Combaudon, Isabelle Moretti, Barbara I. Kleine, Andri Stefansson
Summary: Hydrogen emissions from geothermal fields in Iceland are comparable to those along the mid-Atlantic Ridge, with concentrations mainly influenced by rock type and source water composition. Geothermal power plants in Iceland emit approximately 1.2 kt H-2 per year, which could potentially be utilized given the implementation of necessary extraction technologies.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Geochemistry & Geophysics
Jihun Kim, Dhongil Lim, Dohyun Jeong, Zhaokai Xu, Haryun Kim, Jonguk Kim, Dongsung Kim
Summary: The study investigates the characterization of mercury in the deep-sea ridge environment, focusing on its concentration, chemical forms, and isotopic compositions in surface sediments from the Central Indian Ridge. The results show that hydrothermal activity driven by serpentinization is associated with highly elevated mercury concentrations in sediments near hydrothermal vents. The dominant sources of mercury are syngenetic magmatic or mantle-derived materials, with preferential precipitation of lighter isotopes during sulfide formation.
Article
Geosciences, Multidisciplinary
Chuanshun Li, Guohuai Wang, Shijuan Yan, Dewen Du
Summary: This study explores the spatial distribution characteristics of hydrothermal vents on the Mid-Atlantic Ridge by collecting geological and geochemical data. The research finds that basalts near known vents have a narrow range of analogy viscosity, which may favor the formation of hydrothermal vents. However, further verification is needed due to the complexity of magmatic activity and fault structures.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geochemistry & Geophysics
Alessio Sanfilippo, Vincent J. M. Salters, Sergey Y. Sokolov, Alexander A. Peyve, Andreas Stracke
Summary: The upper mantle is a mixture of refractory and recycled crustal domains, with the recycled portions dominating the composition of surface basalts. Hf isotope ratios may provide hints for melting of refractory source materials in basalts, allowing the identification of depleted mantle materials. Basalts from the Arctic Atlantic show high Hf isotope ratios, suggesting a highly depleted asthenospheric mantle source beneath this region.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Microbiology
Mustafa Yuecel, Serhat Sevgen, Nadine Le Bris
Summary: The study reveals the presence of different sizes of iron particles in the Mid-Atlantic Ridge hydrothermal system, where the nanoparticulate/colloidal phase changes with sample temperature and the distribution of iron particles of different sizes varies in the plume. The results support previous observations of dissolved iron in MAR vent plumes, suggesting that this recalcitrant iron pool contributes to maintaining high hydrothermal iron fluxes to the deep ocean. Unexpected findings in sample collection could have implications for further research.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Geochemistry & Geophysics
Yu-Te Hsieh, Luke Bridgestock, Peter P. Scheuermann, William E. Seyfried, Gideon M. Henderson
Summary: The study reveals that hydrothermal vent fluids contain a variety of barium forms, but their initial composition changes due to barite precipitation. Water-rock interaction in the deep oceanic crust appears to occur without barium isotope fractionation. During mixing with seawater, barite precipitation selectively removes isotopically light barium from the fluids.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Geochemistry & Geophysics
Luise J. Wagner, Ilka C. Kleinhanns, Maria I. Varas-Reus, Carolina Rosca, Stephan Konig, Wolfgang Bach, Ronny Schoenberg
Summary: Stable isotopes of chromium and iron are useful indicators of redox conditions in magmatic systems. Partial melting and fractional crystallization are dominant fractionation processes for these isotopes, but the source mineralogy also plays a significant role. This study analyzes MORB glasses to investigate the role of magmatic processes and source isotope signatures on the composition of chromium and iron isotopes.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Geography
Luis Somoza, Teresa Medialdea, Francisco J. Gonzalez, Sara Machancoses, Jose A. Candon, Constantino Cid, Antonio Calado, Andreia Afonso, Luisa Pinto Ribeiro, Iker Blasco, Monica Albuquerque, Maria Asensio-Ramos, Renato Bettencourt, Cristina De Ignacio, Enrique Lopez-Pamo, Bruno Ramos, Blanca Rincon-Tomas, Esther Santofimia, Miguel Souto, Ines Tojeira, Claudia Viegas, Pedro Madureira
Summary: This study presents a new high-resolution multibeam bathymetric map of a segment of active deep sea-floor spreading in the northern Mid-Atlantic Ridge at 45-46°N. The map reveals detailed submarine morphology, particularly of the Moytirra hydrothermal active field, offering insights into giant anhydrite-sulfide chimneys, active black smokers, and polymetallic massive sulfides discovered through ROV submarine observations.
Article
Fisheries
Jacob E. Lerner, Christian Marchese, Brian P. Hunt
Summary: In coastal marine food webs, food chain length and trophic level distribution are crucial elements of ecosystem-based management. This study evaluates the hypothesis that high primary production leads to lower trophic levels and shorter food chain length in British Columbia coast. The results support this hypothesis, showing a significant inverse relationship between primary production and food chain length as well as trophic level.
ICES JOURNAL OF MARINE SCIENCE
(2022)
Article
Geochemistry & Geophysics
Dennis Sanchez-Mora, John Jamieson, Mathilde Cannat, Javier Escartin, Thibaut Barreyre
Summary: In this study, the Lucky Strike vent field on the Mid-Atlantic Ridge is investigated using bulk rock geochemistry and in situ sulfur isotope analysis. The results show that the hydrothermal deposits in the vent field contain elevated concentrations of elements enriched in mid-ocean ridge basalt. The sulfur isotope compositions of hydrothermal marcasite and chalcopyrite are similar to other sediment-free basalt-hosted seafloor hydrothermal sites, but there are differences in sulfur isotopes between different vent sites. Furthermore, the geochemistry of the hydrothermal deposits at Lucky Strike can be distinguished from other types of deposits using the Ba/Co ratio.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2022)
Article
Oceanography
Unyime U. Umoh, Li Li, Juan He, Lingdi Chen, Liang Dong, Guodong Jia, Niko Lahajnar, Gary Massoth, Ulrich Schwarz-Schampera
Summary: Investigations on hydrocarbon distribution in deep seawaters of the Mid-Indian Basin and hydrothermal vent sites of the Central and Southeast Indian Ridges revealed a bimodal distribution of detected hydrocarbons, with a predominance of even-numbered n-alkenes and a series of n-alkane hydrocarbons. The presence of sulfate-reducing microorganisms and potential abiogenic sources may contribute to the distribution features. Additionally, the aliphatic profiles reflect bio-geochemical processes and minor impacts of hydrothermal activity on hydrocarbon distributions and deep water circulations in the Indian Ocean.
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
(2021)
Article
Environmental Sciences
Mariana Cruz, Nadine Le Bris, Ana Colaco
Summary: This study revealed the reproductive ecology characteristics of hydrothermal vent species S. mesatlantica, including the behavior of brooding female crabs, gametogenesis, fecundity, and embryonic and larvae development. The results showed that brooding crabs exhibit specific brooding behaviors and may provide oxygen to their embryos.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Geochemistry & Geophysics
Pengyuan Guo, Yaoling Niu, Pu Sun, Junjie Zhang, Shuo Chen, Meng Duan, Hongmei Gong, Xiaohong Wang
Summary: The study provides new Sr-Nd-Hf isotopic data on mid-ocean ridge basalts from the Oceanographer and Hayes fracture zones at the Mid-Atlantic Ridge to constrain the nature and origin of upper mantle heterogeneity. The data illustrate that the mantle sources of these lavas comprise three components, including ADM, E-type I, and E-type II components, which explain the contrast in crustal thickness, ridge morphology, and mantle Bouguer anomalies between the two ridge segments.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Ecology
Pierre Methou, Ivan Hernandez-Avila, Cecile Cathalot, Marie-Anne Cambon-Bonavita, Florence Pradillon
Summary: Rimicaris shrimps are important components of hydrothermal vent ecosystems, and two species, R. exoculata and R. chacei, cooccur on the Mid-Atlantic Ridge. They have different morphology, trophic regime, and abundance. A recent study revealed unexpectedly high abundance of R. chacei juvenile stages. This research describes and compares the population structure of R. exoculata and R. chacei, showing distinct demographics and spatial segregation patterns between the two species and their different life stages. Potential factors, such as predation and competitive interactions, may explain the differences observed.
MARINE ECOLOGY PROGRESS SERIES
(2022)
Article
Oceanography
A. Colaco, H. T. Rapp, N. Campanya-Llovet, C. K. Pham
Summary: This study investigated the effects of bottom trawling on Geodia sponges, including changes in abundance, size composition, and functional and species diversity of associated fauna. The results showed that bottom trawling significantly reduced the abundance and size of Geodia sponges, and caused a shift in functional diversity.
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2022)
Article
Environmental Sciences
Imants G. Priede, Frank E. Muller-Karger, Tomasz Niedzielski, Andrey V. Gebruk, Daniel O. B. Jones, Ana Colaco
Summary: This study examines the main drivers that may increase biomass and biodiversity of non-chemosynthetic benthic megafauna in the lower bathyal of the Mid-Atlantic Ridge. The findings suggest that primary production in surface waters is not significantly different between the MAR and abyssal regions, but the quantity of organic matter reaching the sea floor is higher on the MAR due to shorter vertical transport distance. Depth variation, substrate heterogeneity, and the presence of a biogeographic overlap zone also contribute to increased biodiversity. However, more intensive biological sampling is urgently needed in the proposed mining areas south of the Azores.
FRONTIERS IN MARINE SCIENCE
(2022)
Review
Environmental Sciences
Marjolaine Matabos, Thibaut Barreyre, S. Kim Juniper, Mathilde Cannat, Deborah Kelley, Joan M. Alfaro-Lucas, Valerie Chavagnac, Ana Colaco, Javier Escartin, Elva Escobar, Daniel Fornari, Jorg Hasenclever, Julie A. Huber, Agathe Laes-Huon, Nadine Lanteri, Lisa Ann Levin, Steve Mihaly, Eric Mittelstaedt, Florence Pradillon, Pierre-Marie Sarradin, Jozee Sarrazin, Beatrice Tomasi, Ramasamy Venkatesan, Clement Vic
Summary: This paper discusses the unique ecosystems and biodiversity of mid-ocean ridge hydrothermal vent systems and emphasizes the importance of observatories as valuable tools for environmental impact assessment. The article provides a synthesis of scientific advancements enabled by observatories and proposes recommendations for future studies through international collaboration and coordination.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Studies
P. P. E. Weaver, J. Aguzzi, R. E. Boschen-Rose, A. Colaco, H. de Stigter, S. Gollner, M. Haeckel, C. Hauton, R. Helmons, D. O. B. Jones, H. Lily, N. C. Mestre, C. Mohn, L. Thomsen
Summary: Deep-sea mining, particularly the mining of polymetallic nodules, is likely to have both positive aspects such as increasing metal supply for battery production, and negative aspects such as large-scale environmental impacts. This article discusses the potential impacts of sediment plumes generated by mining vehicles near the seabed, as well as methods for measuring and comparing different mining vehicles. The findings of this study will assist the International Seabed Authority in regulating deep-sea mining activities and promoting the use of best available technology and environmental practices.
Article
Ecology
Ulrike Hanz, Philip Riekenberg, Anna de Kluijver, Marcel van der Meer, Jack J. Middelburg, Jasper M. de Goeij, Martijn C. Bart, Erik Wurz, Ana Colaco, Gerard C. A. Duineveld, Gert-Jan Reichart, Hans-Tore Rapp, Furu Mienis
Summary: This study reveals how deep-sea sponge grounds survive in a food-limited environment through stable isotope analysis. Sponge with high microbial abundance utilize dissolved resources and efficient recycling pathways to sustain themselves and other organisms. Additionally, sponges provide organic material to support the otherwise food-limited associated fauna, contributing to the thriving deep-sea ecosystems.
FUNCTIONAL ECOLOGY
(2022)
Article
Environmental Sciences
Jozee Sarrazin, Cecile Cathalot, Agathe Laes, Julien Marticorena, Loic N. Michel, Marjolaine Matabos
Summary: This study describes the ecology of new types of assemblage dominated by gastropods found in several active sulfide edifices along the northern Mid-Atlantic Ridge. The composition, abundance, diversity, and trophic niche of these assemblages were assessed and compared, revealing different characteristics in different vent fields. These gastropods may play an important ecological role in the MAR vent communities.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Fisheries
Maria Pachiadaki, Felix Janssen, Marina Carreiro-Silva, Telmo Morato, Gilberto P. Carreira, Helena C. Frazao, Patrick Heimbach, Isabel Iglesias, Frank E. Muller-Karger, Miguel M. Santos, Leslie M. Smith, Michael F. Vardaro, Fleur Visser, Joanna J. Waniek, Ann-Christine Zinkann, Ana Colaco
ICES JOURNAL OF MARINE SCIENCE
(2023)
Article
Environmental Sciences
Daphne Cuvelier, Mathilde Vigneron, Ana Colaco, Jens Greinert
Summary: The deep Peru Basin has a unique abyssal scavenging community with a high number of hermit crabs, some of which carry anemones. Whether hermit crabs carry anemones or not is believed to be indicative of environmental changes. After more than two decades of a benthic impact experiment, a decrease in hermit crab densities and a loss of anemones on the Probeebei mirabilis' pleon were observed. It needs to be further investigated if this is a delayed response or a natural variation in the population. The study highlights the need for more research on abyssal community dynamics before deep-sea exploitation.
MARINE ENVIRONMENTAL RESEARCH
(2023)
Editorial Material
Multidisciplinary Sciences
Lisa A. Levin, Joan M. Alfaro-Lucas, Ana Colaco, Erik E. Cordes, Neil Craik, Roberto Danovaro, Henk-Jan Hoving, Jeroen Ingels, Nelia C. Mestre, Sarah Seabrook, Andrew R. Thurber, Chris Vivian, Moriaki Yasuhara
Article
Multidisciplinary Sciences
Amy R. Baco, Rebecca Ross, Franziska Althaus, Diva Amon, Amelia E. H. Bridges, Saskia Brix, Pal Buhl-Mortensen, Ana Colaco, Marina Carreiro-Silva, Malcolm R. Clark, Cherisse Du Preez, Mari-Lise Franken, Matthew Gianni, Genoveva Gonzalez-Mirelis, Thomas Hourigan, Kerry Howell, Lisa A. Levin, Dhugal J. Lindsay, Tina N. Molodtsova, Nicole Morgan, Telmo Morato, Beatriz E. Mejia-Mercado, David O'Sullivan, Tabitha Pearman, David Price, Katleen Robert, Laura Robson, Ashley A. Rowden, James Taylor, Michelle Taylor, Lissette Victorero, Les Watling, Alan Williams, Joana R. Xavier, Chris Yesson
Summary: Management of deep-sea fisheries in areas beyond national jurisdiction requires identification of areas with Vulnerable Marine Ecosystems (VMEs). Currently, fisheries data are used for VME identification, but there is a need for non-invasive data collection. This study aims to establish global consensus guidelines for identifying VMEs from images. The results show inconsistencies in VME indicators and definitions among different regions. The recommendations include establishing a global consensus on VME indicators, adopting imagery surveys as an alternative to traditional methods, and including imagery surveys in impact assessments.
Article
Environmental Sciences
Eudriano F. S. Costa, Neus Campanya-Llovet, Daphne Cuvelier, Gui M. Menezes, Ana Colaco
Summary: The study used a trait-based approach to investigate the functional diversity of landed fish species in the Azores archipelago from 1980 to 2021. Results showed significant variations in functional richness over time, with peaks in the 1980s and 2010s, indicating diversification in target species. The distribution of landings and trait combinations showed higher regularity in the functional space during the 1980s and 1990s.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Ecology
Neus Campanya-Llovet, Amanda E. Bates, Daphne Cuvelier, Eva Giacomello, Diana Catarino, Andrew J. Gooday, Bjorn Berning, Blanca Figuerola, Manuel A. E. Malaquias, Carlos J. Moura, Joana R. Xavier, Tracey T. Sutton, Laurence Fauconnet, Sofia P. Ramalho, Barbara De Moura Neves, Gui M. Machado, Tammy Horton, Andrey V. Gebruk, Kirill Minin, Joel Bried, Tina Molodtsova, Monica A. Silva, Anna Dilman, Antonina Kremenetskaia, Eudriano F. S. Costa, Jameson Clarke, Helen R. Martins, Christopher K. Pham, Marina Carreiro-Silva, Ana Colaco
Summary: Trait-based approaches have become increasingly popular in the scientific community, providing insights into species vulnerability and ecosystem functioning. The FUN Azores trait database, developed collaboratively by 30 researchers, represents a comprehensive assessment of diverse fauna in the Azores Marine Park. The database covers 14 traits for 1,210 species, highlighting gaps in knowledge related to species behavior and life history. The functional maps generated from the database reveal different distribution patterns among size classes and provide a basis for ecological understanding of the marine park.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2023)
Article
Geosciences, Multidisciplinary
Carole Berthod, Jean-Christophe Komorowski, Lucia Gurioli, Etienne Medard, Patrick Bachelery, Pascale Besson, Pauline Verdurme, Oryaelle Chevrel, Andrea Di Muro, Aline Peltier, Jean-Luc Devidal, Sophie Nowak, Isabelle Thinon, Pierre Burckel, Samia Hidalgo, Christine Deplus, Benoit Loubrieu, Delphine Pierre, Sylvain Bermell, Mathilde Pitel-Roudaut, Yvan Reaud, Sacha Fouchard, Manon Bickert, Anne Le Friant, Fabien Paquet, Nathalie Feuillet, Stephan L. Jorry, Yves Fouquet, Emmanuel Rinnert, Cecile Cathalot, Elodie Lebas
Summary: The Fani Maore eruption off the coasts of Mayotte has been intensively monitored using methods similar to those used for subaerial eruptions. The study found that high-flux eruption activities can interact with shallow inactive reservoirs, leading to their reactivation.
COMPTES RENDUS GEOSCIENCE
(2022)
Article
Environmental Sciences
Cedric Boulart, Olivier Rouxel, Carla Scalabrin, Pierre Le Meur, Ewan Pelleter, Camille Poitrimol, Eric Thiebaut, Marjolaine Matabos, Jade Castel, Adrien Tran Y. Lu, Loic N. Michel, Cecile Cathalot, Sandrine Cheron, Audrey Boissier, Yoan Germain, Vivien Guyader, Sophie Arnaud-Haond, Francois Bonhomme, Thomas Broquet, Valerie Cueff-Gauchard, Victor Le Layec, Stephane L'Haridon, Jean Mary, Anne-Sophie Le Port, Aurelie Tasiemski, Darren C. Kuama, Stephane Hourdez, Didier Jollivet
Summary: The discovery of a high-temperature hydrothermal vent field on the Woodlark Ridge is reported, showing evidence of an active and stable hydrothermal circulation for a long period of time. This vent field may act as a dispersing center for hydrothermal fauna in nearby basins.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)