The Race Against Time: Saving the 'Zombie Tree' from Extinction
A mysterious phenomenon has scientists on edge as they race to save a unique species from disappearing forever. Meet the Rhodamnia zombi rainforest tree, a species named as it began its slow, eerie demise. This tree, once vibrant and thriving, has fallen victim to a fungal disease known as myrtle rust, which has stripped it of its ability to grow and reproduce.
The disease, first detected in Australia in 2010, has spread rapidly through native forests, infecting new growth and preventing shoots from maturing. As a result, some trees have already died, and none of the remaining wild population is producing flowers or fruit. It's a dire situation, and scientists are determined to act.
"If you can't grow or reproduce, you're pretty much doomed," says Professor Rod Fensham from the University of Queensland. "It's a race against time."
The Rhodamnia zombi tree, found in the rainforests of Queensland's Burnett region, is small to medium-sized with large dark green leaves, shaggy bark, and hairy white flowers. Its plight is a stark reminder of the devastating impact of myrtle rust.
"It was pretty sick across its range," Professor Fensham notes. "If you can't build up energy stores, eventually you just give up the ghost. If you can't produce seed, the next generation has no hope either."
This disease has already led to the extinction of 17 species, and without intervention, Professor Fensham warns that the Rhodamnia zombi could disappear within decades. It's a profound loss, as these species have taken millions of years to evolve.
"For something that's taken millions of years to evolve to vanish within a generation — it's profound," he says. "It stinks. But it's also extraordinary to witness."
The key to saving this species lies in resistance. Some close relatives of Rhodamnia zombi show natural tolerance to myrtle rust, offering hope that resistance may be hidden within their genomes. However, the problem is that this evolutionary process cannot occur in the wild due to the trees' inability to produce seeds.
To combat this, scientists are working with specialist nurseries to grow clean cuttings in protected conditions. The goal is to keep the plants disease-free long enough for them to flower and set seed, allowing the next generation to be tested for tolerance.
"It's a rare chance to watch evolution in real time," Professor Fensham says. "We're doing everything we can to give these trees a fighting chance."
On Queensland's Sunshine Coast, organizations like Barung Landcare are playing a crucial role in this effort. Horticulturist Alexandra Hayes-Hatten and conservation trainee Milo Wakeman-Bateman are collecting cuttings from wild populations and propagating them in controlled environments.
In the nursery, the shoots are carefully trimmed, treated with rooting hormones, and monitored for signs of infection. It's a delicate balance, but the team is making progress.
"It's a fine line to play," Ms. Hayes-Hatten says. "But there are a few that are doing pretty well."
The work is both challenging and inspiring. Ms. Hayes-Hatten admits, "Learning about something that might just go extinct in the blink of an eye is quite scary. But we've got the people and the resources, so we might as well step up and do something."
Nursery specialists in Lismore and Townsville have also joined the rescue mission. If resistant individuals can be identified, researchers hope to return them to forests where the species once thrived.
"It's ambitious," Professor Fensham acknowledges. "But these trees need time and space without constant exposure to myrtle rust to express any resistance."
The fate of the Rhodamnia zombi hangs in the balance. Left to their own devices, they will remain what scientists have aptly named them: the living dead. But with the dedication of scientists and conservationists, there is a glimmer of hope that this species can be saved from extinction.
