Environmental DNA, or eDNA, refers to the genetic material that organisms leave behind in their environment —through skin cells, scales, feathers, mucus, feces, pollen, or decaying tissue. This DNA can be collected from water, soil, or even air samples without ever needing to directly observe or capture the species.
eDNA allows us to detect the presence of species in an environment simply by analyzing a sample of that environment. This is a game-changer for ecological monitoring because it provides a non-invasive, highly sensitive, and cost-effective way to survey biodiversity.
We collect a sample (usually soil or water) and extract DNA from it. That DNA is then screened for genetic markers that match known species. The result is a list of species (or higher-level taxa) that were present in the environment —often including those that are difficult to find with traditional survey methods.
Detect a wide range of species from microbes to mammals in a single sample.
Confirm the presence of rare or invasive species without disturbing habitats.
Understand species assemblages across different environments or restoration stages.
Track freshwater or marine biodiversity without the need for nets or traps.
Generate foundational biodiversity data to support environmental impact assessments.
eDNA offers a powerful complement (or alternative) to conventional field surveys. It can detect species even when they’re elusive, present at low abundance, or only leave behind microscopic traces. It’s especially valuable in sensitive ecosystems where minimal disturbance is crucial.
At Symbiosis Associates, we believe in working with nature, not against it. Our philosophy is rooted in deep ecology, which sees the natural world as interconnected and valuable in its own right.
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