Amarachi Paschaline Onyena | Biodiversity And Conservation | Best Researcher Award

Published on by Zoology Honour

Dr. Amarachi Paschaline Onyena | Biodiversity And Conservation | Best Researcher Award

Lecturer | Nigeria Maritime University | Nigeria

Dr. Amarachi Paschaline Onyena’s research spans marine biology and aquatic environmental science, with a core focus on water sediment quality assessment, benthic macroinvertebrate ecology, ecotoxicology, molecular characterization, and environmental risk evaluation. Her work examines how pollutants such as heavy metals, hydrocarbons, and microplastics influence aquatic ecosystems, using integrated approaches that combine biomonitoring tools, molecular techniques, and analytical assessments to understand contamination pathways, ecological stress responses, and indicators of ecosystem degradation. She contributes extensive research on mangrove ecosystem dynamics, sediment biogeochemistry, and the role of macrobenthic communities as sensitive bioindicators of environmental change. Through field investigations, experimental analyses, and systematic reviews across diverse Nigerian aquatic environments, she provides evidence-based insights for pollution mitigation, microplastic monitoring, and sustainable aquatic resource governance. Her involvement in environmental risk assessments, consultancy-based evaluations, and collaborative marine studies supports policy development for coastal sustainability and blue-economy advancement. Contributions to global platforms, including work for the United Nations World Ocean Assessment, reflect her commitment to translating scientific findings into practical frameworks for ocean governance. With 590 citations, 29 indexed documents, and an h-index of 12, her growing research impact highlights her role in advancing marine pollution science, improving environmental monitoring frameworks, and promoting evidence-based strategies for resilient coastal and marine ecosystems.

Profiles : Google Scholar | Scopus

Featured Publication

Onyena, A. P., & Sam, K. (2020). A review of the threat of oil exploitation to mangrove ecosystem: Insights from Niger Delta, Nigeria. Global Ecology and Conservation, 22, e00961.

Onyena, A. P., Aniche, D. C., Ogbolu, B. O., Rakib, M. R. J., Uddin, J., & Walker, T. R. (2021). Governance strategies for mitigating microplastic pollution in the marine environment: A review. Microplastics, 1(1), 15–46.

Rakib, M. R. J., Rahman, M. A., Onyena, A. P., Kumar, R., Sarker, A., Hossain, M. B., … (2022). A comprehensive review of heavy metal pollution in the coastal areas of Bangladesh: Abundance, bioaccumulation, health implications, and challenges. Environmental Science and Pollution Research, 29(45), 67532–67558.

Chris, D. I., Onyena, A. P., & Sam, K. (2023). Evaluation of human health and ecological risk of heavy metals in water, sediment and shellfishes in typical artisanal oil mining areas of Nigeria. Environmental Science and Pollution Research, 30(33), 80055–80069.

Sam, K., Onyena, A. P., Zabbey, N., Odoh, C. K., Nwipie, G. N., Nkeeh, D. K., Osuji, L. C., … (2023). Prospects of emerging PAH sources and remediation technologies: Insights from Africa. Environmental Science and Pollution Research, 30(14), 39451–39473.

The nominee’s work advances environmental sustainability by providing evidence-based insights into pollution risks affecting coastal and marine ecosystems. Their research supports stronger policies, healthier communities, and long-term ecosystem resilience.

Estelle Crochelet | Biodiversity and conservation | Best Researcher Award

Published on by Zoology Honour

Dr. Estelle Crochelet | Biodiversity and conservation | Best Researcher Award 

Scientific Director | University of Reunion Island | Reunion 

Dr. Estelle Crochelet’s research focuses on marine ecology, biodiversity conservation, and sustainable management of tropical and island ecosystems in the Western Indian Ocean. As a Marine Ecologist at the Biodiversity Research Agency of Réunion Island (ARBRE), she integrates field ecology, molecular analysis, and spatial modeling to study coral reef systems, mesophotic ecosystems, and species connectivity. Her pioneering application of environmental DNA (eDNA) techniques has transformed biodiversity monitoring by enabling the detection of rare and cryptic species such as sharks and rays, advancing ecosystem-based management and conservation planning. Through leadership roles in major initiatives including the IRRAE, MAEO, and CONCILIER programs, Dr. Crochelet has contributed to integrated coral reef management, linking ecological research with territorial planning and policy implementation. Her interdisciplinary work, combining marine biology, remote sensing, and ecological modeling, has generated valuable insights into habitat connectivity, reef resilience, and marine spatial planning. Collaborating with organizations such as IUCN, IRD, and the French Biodiversity Office, she has played a vital role in shaping regional conservation strategies and advancing scientific understanding of marine ecosystems. Widely published in prestigious journals such as Nature, Science, Environmental DNA, and Deep Sea Research, Dr. Crochelet’s work has global relevance, addressing the challenges of biodiversity loss and climate impacts on marine environments. Alongside her scientific achievements, she mentors emerging researchers, leads citizen science initiatives, and promotes public awareness of ocean conservation. A certified professional diver, rebreather user, and drone pilot, she combines technical field expertise with innovative research approaches, making significant contributions to sustainable marine governance and biodiversity preservation in the Southwestern Indian Ocean.

Profiles : Scopus | ORCID

Featured Publications

Crochelet, E., Desbonnes, O., Inçaby, L., Nazurally, N., Stevens, G., van Beuningen, D., Gadenne, J., Morand, G., Bertrand, G., & Nikolic, N. (2025). Biodiversity and conservation of elasmobranchs in the Mascarene Islands: Policy implementation and protection strategies. Ocean & Coastal Management, 262, 107921.

Crochelet, E., Barrier, N., Andrello, M., Marsac, F., Spadone, A., & Lett, C. (2020). Connectivity between seamounts and coastal ecosystems in the Southwestern Indian Ocean. Deep-Sea Research Part II: Topical Studies in Oceanography, 180, 104774.

Bourjon, P., Crochelet, E., & Fricke, R. (2019). First record of the large caerulean damselfish, Pomacentrus caeruleopunctatus (Actinopterygii: Perciformes: Pomacentridae), from Réunion Island, southwest Indian Ocean. Acta Ichthyologica et Piscatoria, 49(3), 293–297.

Queiroz, N., Humphries, N. E., Couto, A., Vedor, M., da Costa, I., Sequeira, A. M. M., Mucientes, G., Santos, A. M., Abascal, F. J., Abercrombie, D. L., et al. (2019). Global spatial risk assessment of sharks under the footprint of fisheries. Nature, 572(7770), 461–466.

Soria, M., Heithaus, M. R., Blaison, A., Crochelet, E., Forget, F., & Chabanet, P. (2019). Residency and spatial distribution of bull sharks Carcharhinus leucas in and around Réunion Island marine protected area. Marine Ecology Progress Series, 626, 85–97.

Dr. Estelle Crochelet’s research advances global marine conservation through innovative studies on elasmobranch ecology, connectivity, and policy implementation across the Mascarene and Western Indian Ocean. Her work bridges ecological modeling, spatial management, and biodiversity protection—informing sustainable fisheries, strengthening marine protected areas, and shaping evidence-based conservation strategies that safeguard ocean ecosystems and coastal livelihoods worldwide.