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
Data sets
Census counts of the non-indigenous benthic foraminifera Trochammina hadai Uchio obtained in 1983-2024 in San Francisco Bay M. McGann https://doi.org/10.5066/P13UOJDV
Survey of sites for the presence of the non-indigenous benthic foraminifera Trochammina hadai along the west coast of North America from 1930 to 2024 M. McGann et al. https://doi.org/10.5066/P13KSOAC
Radiochemistry (210Pb and 137Cs) of cores BC01 and BC02 obtained in 2024 off Alameda and Point Isabel in San Francisco Bay M. McGann and T. D. Lorenson https://doi.org/10.5066/P9QQT6KZ
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,...
