Scientists are using DNA from poop to save the world's rarest marsupial, the Gilbert's potoroo. This critically endangered species, found only in Western Australia, has fewer than 150 animals left in the wild. Researchers from Edith Cowan University (ECU) and the Department of Biodiversity, Conservation and Attractions (DBCA) are working together to understand the potoroo's diet, which is crucial for identifying suitable habitats and securing the species' future. By using environmental DNA (eDNA) metabarcoding on scat samples, scientists can study the potoroo's diet without disturbing them. This technique is particularly useful for studying fungi-eating mammals, as fungi remain a challenge to identify through traditional methods.
The study found that the potoroo's diet overlaps with other fungi-eating mammals, such as quokka, quenda, and bush rat. This overlap in diet and habitat use suggests that focusing on areas where these species coexist could be an indicator of suitable food and habitat for future potoroo translocation sites. The research also highlights the importance of wild-to-wild translocations, as breeding in captivity has not been successful due to the potoroo's picky eating habits.
The Gilbert's potoroo was once believed to be extinct before being rediscovered in 1994. Since then, conservation efforts have focused on increasing the population through translocations. In 2015, a bushfire destroyed a significant portion of the potoroo's habitat, but insurance populations had been established on Bald Island and in a fenced enclosure at Waychinicup National Park. Researchers are now searching for another suitable mainland site to establish an additional population.
Fungi-eating mammals, such as the Gilbert's potoroo, play a crucial role in maintaining healthy ecosystems. They act as ecosystem engineers, digging for fungi and dispersing fungal spores. However, many Australian mammals are threatened by predation from introduced cats and foxes. Protecting native wildlife through translocations is essential to preserving these vulnerable species and maintaining the balance of ecosystems.
In conclusion, the use of DNA from poop to study the diet of the Gilbert's potoroo is a fascinating and innovative approach to conservation. By understanding the potoroo's dietary needs, scientists can better protect and restore this rare marsupial's population. This research highlights the importance of non-invasive methods in wildlife conservation and the role of fungi-eating mammals in maintaining ecosystem health.
