A Hidden Threat to Brisbane's Lizards: Unveiling a Fungal Disaster
The eastern water dragons of Brisbane are facing an unseen enemy. A mysterious fungus, Nannizziopsis barbatae, is wreaking havoc on these iconic lizards, and researchers are concerned about its potential impact on Australia's reptile population.
This fungus, which feeds on the reptile's scales, has already caused skin lesions and lethargy, leading to starvation and death. The study, conducted over a decade, reveals a disturbing spread. In the Roma Street Parklands, a single case has now affected half of the population.
Sam Gallagher-Becker, a PhD candidate at the University of Queensland, describes the fungus's devastating effects. It can cause limbs to fall off and digits to be lost, and in severe cases, the flesh dies and rots, leading to the animal's demise.
The fungus is not confined to one area or species. It has been detected in various reptile populations across Brisbane, with some areas showing higher disease levels. Outbreaks have also been reported in distant locations like Dubbo and Perth, indicating a potential national crisis.
The origin of the fungus remains a mystery. Is it native to Australia or an introduced species? This question is crucial, as an introduced fungus could have more severe consequences. As Gallagher-Becker notes, it could be a new pathogen, leading to unknown and potentially devastating effects.
The concern is heightened by historical examples like the chytrid fungus and white-nose syndrome, which have caused the extinction of over 100 species worldwide. In Australia, the chytrid fungus has contributed to the decline of 43 frog species, including the presumed extinction of seven since its discovery near Brisbane in 1978.
The situation is dire, as Associate Professor Celine Frere highlights. With 90% of Australia's reptile species being endemic, the fungus poses a significant threat. It lacks treatment and can impact the majority of reptile species, making it a national emergency.
The lack of knowledge about the fungus is a major concern. As Jodi Rowley, curator of Amphibian and Reptile Conservation Biology at the Australian Museum, points out, wildlife diseases are often understudied, especially in reptiles. The more we learn, the more we realize the potential danger to Australia's biodiversity.
Climate change, extreme weather, and increased wildlife movement are contributing to the rise of fungal diseases globally. Rowley emphasizes the need for better surveillance to detect and respond to these threats, especially if they are introduced from overseas.
This hidden threat to Brisbane's lizards serves as a reminder of the delicate balance of nature and the urgent need for research and conservation efforts to protect Australia's unique wildlife.
