The CSIRO is urging Australians to take action against feral weeds and animals.

Like much of Australia, the Fleurieu has a wide-spread problem with rabbits, feral cats, deer and invasive weeds.

In a report released last week the CSIRO said the environment is facing a “sliding doors” moment, with two possible futures for Australia, depending on the decisions made today.

It highlights a looming wave of new extinctions and outlines two futures for Australia, one based on an unsustainable ‘business as usual’ approach and the other based on implementing targeted actions that will help save our unique biodiversity.

The report pegs the conservative cost of damage caused by invasive species in Australia – predominantly weeds, feral cats, rabbits and fire ants – at $390 billion over the past six decades and around $25 billion each year and growing.

Co-author and CISS chief executive, Mr Andreas Glanznig said invasive species have contributed to the extinction of 79 Australian native species.

The biggest menace to native animals is the European rabbit which ranges in large numbers across the Fleurieu.

As well as the destruction caused by introduced animals, invasive plants cause havoc in farmlands, forests and savannas. Australia now has more than 2,700 established weed species – which grew by 20 new species every year – or one new weed every 18 days.

Climate change, international trade and travel movements, and extreme weather events such as floods, fires and drought, drove the spread of invasive species. 

“The challenge is for all Australians to work together to stop the problem from getting worse,” Mr Glanznig said.

“Together we can work to drive down Australia’s native species extinction rate – currently over four species a decade- towards net zero extinctions.

“From suburban backyards to science labs, everyone can play a role in pest and weed prevention and control,” he said.

“Education and public awareness programs are needed so we can enlist millions of Australians to help find and eradicate invasive species before they get a foothold.

“The technology exists to establish a national, coordinated community surveillance network, making it possible for everyone to get involved, to help find new invaders early before they can become a problem.”

Over eight in 10 nationally-listed threatened species are endangered by invasive species. More than 70 percent of Australia’s native animals are found nowhere else on earth, so a loss to Australia is a loss to the world. Invasive species also undermine agriculture leading to increased food and fibre prices. 

Report co-author, CSIRO scientist Dr Andy Sheppard said while many Australians were aware of the havoc caused by the recent mouse plagues in New South Wales, Queensland and Victoria, they had no idea of the magnitude of the invasive species issue for Australia.

“Urgent, decisive, coordinated action is crucial to stopping the spread of invasive species and to protect our extraordinary, irreplaceable native animals and plants, and Australia has a great track record in this space,” Dr Sheppard said. 

“It is the only way to stop the spread of invasive species, protect native plants and animals and preserve many of our favourite Australian outdoor pastimes.”

Dr Sheppard said many more smart decisions and interventions were needed to ensure resources were invested where they were most effective. 

“Prevention will be much cheaper and more effective than trying to control the spread of pests and weeds once they are established.

“We need to safely harness emerging technologies, revitalise our biosecurity research and innovation (R&I) system and continue to invest in long term, strategic research and development,” he said.

Globally, invasive species are ranked as the 5th greatest issue facing the environment, but in Australia it’s the number one issue. Australia has the highest rate of vertebrate mammal extinctions in the world.

Download a copy of the report: Fighting Plagues and Predators: Australia’s path to a pest and weed-free future.  PDF (12 MB)

FAST FACTS

• There are up to 6 million feral cats and 23 million feral pigs in Australia.
• Cane toads have invaded more than 1 million square kilometres of Australia.
• From 1960 to 2017, invasive species cost Australia at least $390 billion.
• Grain growers spend more than $2.5 billion a year on weed control.

DID YOU KNOW?

• Feral cats and foxes have killed off 25 native mammal species.
• Just four pests - rabbits, feral pigs, cats, and a plant pathogen - endanger 800 threatened species.
• More than 2700 weed species make up 12 per cent of Australia's flora.
• European rabbits are the single biggest menace to threatened native species.
• Fire ants are one of the worst invasive species in Australia.
• Australia has the world's largest wild camel population.

WHAT CAN YOU DO?

• Follow the rules for biosecurity when returning home from interstate or overseas.
• Be a responsible pet owner. Keep cats indoors, register your animals and keep them out of wildlife areas.
• Grow native plants in your garden; remove weeds and look out for those that pose a biosecurity risk to Australia.
• Report feral animals' locations.
• Be alert for signs of disease in farm animals and stock.