Developing Nature-Based Water Management Approaches Using Biological Functions of Brackish Bivalves
Human society depends on benefits provided by ecosystems, commonly referred to as ecosystem services. Sustaining these services requires environmentally conscious water management strategies that incorporate biodiversity conservation. Our research focuses on the brackish-water clam Corbicula japonica, a species inhabiting Lake Hinuma in eastern Japan. We investigate the physiological, biochemical, and ecological responses of C. japonica to environmental stressors, including climate change and anthropogenic impacts. To achieve this, we integrate biochemical biomarkers such as antioxidant responses with organism-level indicators including growth potential and valve-gaping activity to conduct multifaceted assessments of environmental stress. In parallel, we are developing nature-based water management approaches that utilize the high filtration and water purification capacity of C. japonica. Through these studies, we aim to contribute to the sustainable use of ecosystem services and the creation of environmental and societal value in aquatic systems.
Recent Publications:
- Hayakawa, K., Fujita, M. (2025) Responses of antioxidant markers and valve activity of the brackish water clam Corbicula japonica under single/combined exposures of polystyrene microplastics and thermal stress, Japanese Journal of JSCE, 81 (17), 25-17163 (in Japanese). doi: 10.2208/jscejj.25-17163.
- Sugawara, T., Fujita, M. (2025) Effects of granulated coal ash used for sediment improvement on the brackish water clam Corbicula japonica, Japanese Journal of JSCE, 81 (17), 25-17261 (in Japanese). doi: 10.2208/jscejj.25-17261.
- Saputra HK, Miura N, Pokhrel P, Zhao G, Fujita M (2024) Comprehensive assessment of multiple biomarker mechanisms in the brackish water clam Corbicula japonica exposed to polystyrene microplastics using structural equation modeling, Science of the Total Environment 949, 175089. doi: 10.1016/j.scitotenv.2024.175089.
- Pokhrel P, Mashiko S, Akther S, Suzuki J, Fujita M (2022) Antioxidant capacity and carbon-based scope for growth of brackish water clams Corbicula japonica under the combined effects of natural and anthropogenic factors, Environmental Pollution 308, 119676. doi: 10.1016/j.envpol.2022.119676.
- Pokhrel P, Suzuki J, Akther S, Fujita M (2021) Physiological and biochemical responses of brackish-water clam Corbicula japonica under global-warming conditions: Water temperature, salinity, and food availability, Ecological Indicators 129, 107866. doi: 10.1016/j.ecolind.2021.107866.
