environmental DNA

Environmental DNA (eDNA) refers to genetic material shed by organisms—such as skin cells, hair, scales, or waste—that can be found in natural environments like water, soil, or air. Scientists collect samples from these environments and analyze the DNA to identify which species are present without needing to see or catch the organisms themselves. This method is highly sensitive and non-invasive, making it valuable for monitoring biodiversity, tracking rare or invasive species, and studying ecosystems efficiently and accurately.