Environmental DNA Sampling
A technique that detects and analyses DNA fragments from organisms present in environmental samples like water or soil without capturing the organisms directly.
Real World
Natural England used eDNA water sampling to confirm great crested newt presence in ponds across Lincolnshire, replacing labour-intensive torch surveys and reducing survey costs by over 80%.
Exam Focus
For 'evaluate' questions, always include a limitation of eDNA — e.g., DNA persistence in water means a species may no longer be present despite a positive detection.
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