CityUHK team invents novel eDNA membrane to advance understanding of inshore fish diversity
Researchers at City University of Hong Kong have developed a new membrane coated with molybdenum disulphide to improve the detection of environmental DNA (eDNA) in seawater. This innovation allows for more sensitive monitoring of marine biodiversity without the need to capture physical specimens.
Why it matters
Enhanced eDNA detection tools are critical for tracking ecosystem health and managing marine conservation efforts in the face of climate change.
HONG KONG , Sept. 14, 2026 /PRNewswire/ -- Monitoring marine life helps scientists track ecosystem health, improve conservation, and manage fisheries. A promising approach is environmental DNA (eDNA), which refers to trace genetic material naturally released into the water by organisms, such as skin cells, mucus and excreta. By analysing eDNA in water samples, scientists can determine which species are present in a given body of water without the need to physically capture or observe the organisms. This method is of great significance for monitoring marine ecosystems and conserving biodiversity. In practical applications, however, DNA concentrations in seawater are extremely low, making it difficult for traditional membranes to capture it effectively.
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