Home / Science / eDNA detects rare frogs, offering conservation hope
eDNA detects rare frogs, offering conservation hope
28 Aug
Summary
- Environmental DNA in water samples detects threatened frogs.
- Some frog populations are more widespread than thought.
- One critically endangered frog species has a single confirmed population.
In the rainforest streams of Queensland's Wet Tropics, an aquatic fungus significantly impacted frog populations in the late 20th century. Researchers have now employed environmental DNA (eDNA) analysis to detect threatened frog species by examining water samples. This method has shown that some species, including the Waterfall Frog and Lacelid Frog, are more widely distributed and are showing signs of recovery.
The study led by Dr. Cecilia Villacorta-Rath utilized eDNA to find genetic material shed by frogs into creek waters, even up to 22 km downstream. This technique has provided crucial data, confirming that populations, once thought to be on the brink of extinction, are present in numerous creeks. For the Critically Endangered Armoured Mistfrog, eDNA confirmed that only a single population has survived.
This groundbreaking use of eDNA simplifies surveying, making it accessible for citizen science groups and Indigenous rangers. It offers a powerful tool for conservationists to identify at-risk populations. By understanding where these species exist, targeted protection and restoration efforts can be prioritized. The research, supported by the Australian Government, demonstrates how eDNA analysis can reveal the hidden presence of species, offering a hopeful new avenue for biodiversity monitoring.
