Une décennie de travail aide la faune indigène de l'île éloignée à "retourner à 1616"

On Dirk Hartog Island, located approximately 850 kilometers north of Perth in Western Australia’s Shark Bay World Heritage Area, a remarkable milestone has been reached in the ongoing efforts to restore the island’s native ecosystems. For the first time in over a century, a small native marsupial known as the bettong, commonly referred to as the “rat kangaroo”, has returned to the island, marking a significant step toward the ambitious goal of restoring the area to its pre-colonial state, dubbed “Return to 1616.” This achievement comes after a decade of dedicated environmental restoration work aimed at eliminating invasive species and rehabilitating habitats. The bettong, a small, hopping marsupial, is among several native species being reintroduced to the island as part of this broader conservation initiative. The return of the bettong represents not only a success for wildlife recovery but also a testament to the meticulous scientific research and fieldwork undertaken by conservationists. The reintroduction of the bettong was made possible through the collaborative efforts of the Western Australian Department of Biodiversity, Conservation and Attractions (DBCA) and local researchers such as Dr. Rebecca Quah, a PhD student at Edith Cowan University. Dr. Quah played a crucial role in assessing whether the island’s environment was suitable for the bettong’s survival. Her work involved analyzing the dietary habits of the species by examining the fungal content in their fecal matter, which provided insights into what the bettongs consumed in their original habitat. Dr. Quah explained that the analysis of bettong scat revealed a rich diversity of fungi, many of which were present on Dirk Hartog Island. This discovery was vital in confirming that the island could support a new population of bettongs. She noted that the presence of these fungi indicated that the island’s ecosystem had the potential to sustain the species, even after decades of degradation caused by invasive animals such as feral cats and foxes. The bettong, originally widespread across Australia, was driven to near-extinction due to predation by introduced species. Feral goats further exacerbated the problem by destroying native vegetation, making it difficult to ensure sufficient food sources for the bettongs. However, the successful reintroduction marks a turning point in the island’s ecological rehabilitation. The Return to 1616 project aims to reverse the effects of colonization and restore Dirk Hartog Island to its condition during the time of the first recorded European visit by Dutch explorer Dirk Hartog in 1616. This initiative involves the careful removal of invasive species and the reintroduction of native flora and fauna. The bettong’s return adds to a growing list of species being brought back to the island, including other native mammals and birds. The work of researchers like Dr. Quah highlights the importance of detailed, sometimes unglamorous, scientific methods in conservation. By studying the microscopic components of animal waste, scientists can gain valuable information about diet, health, and even genetic makeup. These findings directly inform conservation strategies, ensuring that reintroduced species have the best chance of thriving in their restored habitats. As the DBCA continues its efforts to rehabilitate Dirk Hartog Island, the return of the bettong stands as a symbol of progress. It reflects the dedication of conservationists and the resilience of native wildlife. With continued monitoring and intervention, the island’s ecosystems may yet recover, offering a glimpse into what Australia’s wilderness once looked like before human impact reshaped it.