Articles | Volume 44, issue 2
https://doi.org/10.5194/jm-44-275-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/jm-44-275-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
08 Sep 2025
Research article |
| 08 Sep 2025
| 08 Sep 2025
Analysis of a human-mediated microbioinvasion: the global spread of the benthic foraminifer Trochammina hadai Uchio, 1962
Mary McGann
CORRESPONDING AUTHOR
U.S. Geological Survey, Pacific Coastal and Marine Science Center, 350 North Akron Road, Moffett Field, California 94035, USA
Maria Holzmann
Department of Genetics and Evolution, The University of Geneva, 30 Quai Ernest Ansermet, 1211 Geneva, Switzerland
Vincent M. P. Bouchet
Univ. Lille, CNRS, ULCO, UMR8187, LOG, Laboratoire d'Océanologie et de Géosciences, Station Marine de Wimereux, 59000 Lille, France
Sibelle Trevisan Disaró
Laboratory of Foraminifera and Environmental Micropaleontology, Federal University of Paraná, Av. Cel. Francisco H. dos Santos, 100 – Jardim das Américas, CEP 81.530-000, Curitiba, PR, Brazil
Museum of Natural Sciences, Av. Cel. Francisco H. dos Santos, 100 – Jardim das Américas, CEP 81.530-000, Curitiba, PR, Brazil
Patrícia P. B. Eichler
Marine Geology and Geophysics and Environmental Monitoring, Federal University of Rio Grande do Norte (GGEMMA, CCET, UFRN), Campus Universitário, Lagoa Nova, Natal, RN, 59072-970, Brazil
David W. Haig
Oceans Institute, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
Stephen J. Himson
School of Geography, Geology and the Environment, University of Leicester, Leicester, LE1 7RH, UK
Hiroshi Kitazato
Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan
Jean-Charles Pavard
Univ. Lille, CNRS, ULCO, UMR8187, LOG, Laboratoire d'Océanologie et de Géosciences, Station Marine de Wimereux, 59000 Lille, France
Department of Marine Sciences, University of Gothenburg, Medicinaregatan 7B, 413 90 Göteborg, Sweden
Irina Polovodova Asteman
Department of Marine Sciences, University of Gothenburg, Medicinaregatan 7B, 413 90 Göteborg, Sweden
Gothenburg Global Biodiversity Centre, University of Gothenburg, Medicinaregatan 7B, 413 90 Göteborg, Sweden
André R. Rodrigues
Laboratório de Oceanografia Costeira, Universidade Federal de Santa Catarina (UFSC), Campus Universitário, Trindade, 88040-900, Florianópolis, SC, Brazil
Clément M. Tremblin
Oceans Institute, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
Centre for Marine Ecosystem Research, Edith Cowan University, 6027, Perth, Western Australia
Masashi Tsuchiya
Research Institute for Global Change (RIGC), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, Kanagawa, 237-0061, Japan
Faculty of Dinosaur Paleontology, Fukui Prefectural University, 4-1-1 Matsuoka-Kenjojima, Eiheiji-cho, Fukui 910-1195, Japan
Mark Williams
School of Geography, Geology and the Environment, University of Leicester, Leicester, LE1 7RH, UK
Phoebe O'Brien
Department of Marine Sciences, University of Gothenburg, Medicinaregatan 7B, 413 90 Göteborg, Sweden
Josefin Asplund
Department of Marine Sciences, University of Gothenburg, Medicinaregatan 7B, 413 90 Göteborg, Sweden
Malou Axelsson
Department of Marine Sciences, University of Gothenburg, Medicinaregatan 7B, 413 90 Göteborg, Sweden
Thomas D. Lorenson
U.S. Geological Survey, Pacific Coastal and Marine Science Center, 2885 Mission Street, Santa Cruz, California 95060, USA
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Vincent M. P. Bouchet, Silvia Helena de Mello e Sousa, Carla Bonetti, Leticia Burone, Pierre Belart, Wania Duleba, Fabio Francescangeli, Fabrizio Frontalini, Lazaro Laut, Débora S. Raposo, André R. Rodrigues, Sibelle Trevisan Disaró, Daniel Vicente Pupo, Fabrício Leandro Damasceno, Jean-Charles Pavard, and Maria Virgínia Alves Martins
J. Micropalaeontol., 44, 237–261, https://doi.org/10.5194/jm-44-237-2025, https://doi.org/10.5194/jm-44-237-2025, 2025
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This study evaluates benthic foraminifera as indicators of environmental health in Brazil’s coastal waters and tests Foram-AMBI using a regional species list and criteria for ecological quality status (EcoQS). A total of 95 species were classified into five groups based on their response to total organic carbon. Data from Sepetiba Bay and Guanabara Bay validated these groups, showing that Foram-AMBI accurately reflects ecological conditions. The study highlights the importance of regional species lists for biomonitoring.
Michael Lintner, Irina Polovodova Asteman, Wolfgang Wanek, Petra Heinz, Jan Goleń, and Jarosław Tyszka
J. Micropalaeontol., 44, 263–273, https://doi.org/10.5194/jm-44-263-2025, https://doi.org/10.5194/jm-44-263-2025, 2025
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Foraminifera are microorganisms which, due to their abundance and diversity, are often used as proxies to describe climatic changes in marine environments. For this purpose, experiments containing antibiotics that are intended to reduce the activity of other microorganisms are carried out with foraminifera. In our study, we examined the influence of antibiotics on foraminifera and tested whether these chemicals are really harmless for foraminifera or not.
Irina Polovodova Asteman, Emilie Jaffré, Agata Olejnik, Maria Holzmann, Mary McGann, Kjell Nordberg, Jean-Charles Pavard, Delia Rösel, and Magali Schweizer
J. Micropalaeontol., 44, 119–143, https://doi.org/10.5194/jm-44-119-2025, https://doi.org/10.5194/jm-44-119-2025, 2025
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Small boat harbours are suggested to cause pollution and alien species introductions. Here we analysed surface sediments in Hinsholmskilen harbour (Sweden) for benthic foraminifera and potentially toxic elements. Molecular and morphological analyses of foraminifera show the presence of two alien species, Trochammina hadai and Ammonia confertitesta, whilst pollution is mostly low for Cd, Co, Ni, and Pb. In contrast, As, Zn, Cu, Hg, and Cr have high levels due to the use of these elements in boat paints.
Julien Richirt, Satoshi Okada, Yoshiyuki Ishitani, Katsuyuki Uematsu, Akihiro Tame, Kaya Oda, Noriyuki Isobe, Toyoho Ishimura, Masashi Tsuchiya, and Hidetaka Nomaki
Biogeosciences, 21, 3271–3288, https://doi.org/10.5194/bg-21-3271-2024, https://doi.org/10.5194/bg-21-3271-2024, 2024
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We report the first benthic foraminifera with a composite test (i.e. shell) made of opal, which coats the inner part of the calcitic layer. Using comprehensive techniques, we describe the morphology and the composition of this novel opal layer and provide evidence that the opal is precipitated by the foraminifera itself. We explore the potential precipitation process and function(s) of this composite test and further discuss the possible implications for palaeoceanographic reconstructions.
Dewi Langlet, Florian Mermillod-Blondin, Noémie Deldicq, Arthur Bauville, Gwendoline Duong, Lara Konecny, Mylène Hugoni, Lionel Denis, and Vincent M. P. Bouchet
Biogeosciences, 20, 4875–4891, https://doi.org/10.5194/bg-20-4875-2023, https://doi.org/10.5194/bg-20-4875-2023, 2023
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Benthic foraminifera are single-cell marine organisms which can move in the sediment column. They were previously reported to horizontally and vertically transport sediment particles, yet the impact of their motion on the dissolved fluxes remains unknown. Using microprofiling, we show here that foraminiferal burrow formation increases the oxygen penetration depth in the sediment, leading to a change in the structure of the prokaryotic community.
Joachim Schönfeld, Nicolaas Glock, Irina Polovodova Asteman, Alexandra-Sophie Roy, Marié Warren, Julia Weissenbach, and Julia Wukovits
J. Micropalaeontol., 42, 171–192, https://doi.org/10.5194/jm-42-171-2023, https://doi.org/10.5194/jm-42-171-2023, 2023
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Benthic organisms show aggregated distributions due to the spatial heterogeneity of niches or food. We analysed the distribution of Globobulimina turgida in the Gullmar Fjord, Sweden, with a data–model approach. The population densities did not show any underlying spatial structure but a random log-normal distribution. A temporal data series from the same site depicted two cohorts of samples with high or low densities, which represent hypoxic or well-ventilated conditions in the fjord.
Julien Richirt, Magali Schweizer, Aurélia Mouret, Sophie Quinchard, Salha A. Saad, Vincent M. P. Bouchet, Christopher M. Wade, and Frans J. Jorissen
J. Micropalaeontol., 40, 61–74, https://doi.org/10.5194/jm-40-61-2021, https://doi.org/10.5194/jm-40-61-2021, 2021
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The study presents (1) a validation of a method which was previously published allowing us to recognize different Ammonia phylotypes (T1, T2 and T6) based only on their morphology and (2) a refined biogeographical distribution presented here supporting the putatively invasive character of phylotype T6. Results suggest that phylotype T6 is currently spreading out and supplanting autochthonous phylotypes T1 and T2 along the coastlines of the British Isles and northern France.
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Short summary
The foraminifer Trochammina hadai, native to Asia, has been found in the USA, Canada, Sweden, France, Brazil, and Australia coastal waters. The primary vectors of introduction include mariculture of oysters and the plant matter in which they were shipped, as well as the release of ballast water/sediment in receiving ports. Secondary introductions occur by mud attached to anchors of fishing and pleasure boats. Globally, the species has spread rapidly, impacting native species and local biodiversity.
The foraminifer Trochammina hadai, native to Asia, has been found in the USA, Canada, Sweden,...
