Articles | Volume 18, issue 13
https://doi.org/10.5194/bg-18-4073-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-18-4073-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Atypical, high-diversity assemblages of foraminifera in a mangrove estuary in northern Brazil
Nisan Sariaslan
Institute für Geowissenschaften, Paläontologie, Universität
Bonn, Bonn 53115, Germany
Martin R. Langer
CORRESPONDING AUTHOR
Institute für Geowissenschaften, Paläontologie, Universität
Bonn, Bonn 53115, Germany
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Skye Yunshu Tian, Martin Langer, Chih-Lin Wei, and Moriaki Yasuhara
EGUsphere, https://doi.org/10.5194/egusphere-2026-775, https://doi.org/10.5194/egusphere-2026-775, 2026
This preprint is open for discussion and under review for Biogeosciences (BG).
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Oceanic islands hold great ecological importance as they support high endemic biodiversity and act as steppingstones of dispersal. We investigated benthic meiofaunas from two exotic tropical archipelagoes (São Tomé-Príncipe in western Africa and the Zanzibar in eastern Africa) and revealed remarkable heterogeneity in their diversity and biogeographic patterns, and more essentially in their environmental controls. High levels of endemicity urge conservation of these vulnerable reef ecosystems.
Skye Yunshu Tian, Martin Langer, Moriaki Yasuhara, and Chih-Lin Wei
Biogeosciences, 21, 3523–3536, https://doi.org/10.5194/bg-21-3523-2024, https://doi.org/10.5194/bg-21-3523-2024, 2024
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Through the first large-scale study of meiobenthic ostracods from the diverse and productive reef ecosystem in the Zanzibar Archipelago, Tanzania, we found that the diversity and composition of ostracod assemblages as controlled by benthic habitats and human impacts were indicative of overall reef health, and we highlighted the usefulness of ostracods as a model proxy to monitor and understand the degradation of reef ecosystems from the coral-dominated phase to the algae-dominated phase.
Anna E. Weinmann, Olga Koukousioura, Maria V. Triantaphyllou, and Martin R. Langer
Web Ecol., 23, 71–86, https://doi.org/10.5194/we-23-71-2023, https://doi.org/10.5194/we-23-71-2023, 2023
Short summary
Short summary
This study analyzes the diversity of benthic foraminifera at the range expansion front of the invasive species Amphistegina lobifera in Corfu (central Mediterranean). The species has been suggested to impact local diversity and community structures, and our results confirm these effects as soon as A. lobifera exceeds a specific abundance threshold (> 20 %). Nevertheless, we found that the study area reveals an overall high biodiversity that can be attributed to its unique location.
Mohamed Kamoun, Martin R. Langer, Chahira Zaibi, and Mohamed Ben Youssef
J. Micropalaeontol., 41, 129–147, https://doi.org/10.5194/jm-41-129-2022, https://doi.org/10.5194/jm-41-129-2022, 2022
Short summary
Short summary
Sedimentology and micropaleontology analyses provide the dynamic processes that shaped the environmental evolution of the Thapsus coastline (Tunisia) including its lagoon and Roman harbor. The highlights are paleoenvironmental change records from the coast of Thapsus for the last 4000 years, benthic foraminiferal biota recording the dynamic coastal processes, two transgressive events being recognized, and a presented model for the paleoenvironmental evolution.
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Short summary
Analyses of foraminiferal assemblages from the Mamanguape mangrove estuary (northern Brazil) revealed highly diverse, species-rich, and structurally complex biotas. The atypical fauna resembles shallow-water offshore assemblages and are interpreted to be the result of highly saline ocean waters penetrating deep into the estuary. The findings contrast with previous studies, have implications for the fossil record, and provide novel perspectives for reconstructing mangrove environments.
Analyses of foraminiferal assemblages from the Mamanguape mangrove estuary (northern Brazil)...
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