Invasive species

The recent Snow Gum Summit in Jindabyne has drawn attention to the health of this notable tree of the Australian alps. The causes or primary cause of widespread snow gum decline, with a particular focus on fire regimes, climate change and insects, and the appropriate response to this problem, are the subject of a considered exchange of differing views here between two experts from different generations but not entirely different schools or schools of thought.

They may look cute and cuddly, but these highly trained sniffer dogs mean business. Fire ant odour detection dogs and their handlers were mobilised in the Lockyer Valley last month to search for the highly invasive pest.

The controversial buffel grass permits announced by Environment Minister Joshua Burgoyne last week apply only to its importation from outside the NT. Once here, the use, propagation, selling and transport of the declared weed has blanket clearance on pastoral lease land, nearly half of the NT, as the Minister is due to approve.

Leading scientists have issued a dire warning that the widespread death of a key eucalypt species in Australian ecosystems could be imminent, due to global heating. Scientists from eminent institutions recently gathered at the Snow Gum Summit in Jindabyne to discuss combating the loss of an iconic tree of the Australian Alps, the Snow Gum.

After decades of government inaction, this is the tragic admission this week about Central Australia’s greatest environmental catastrophe: “Despite the very high risk rating of buffel grass it is considered that [it] cannot be feasibly eradicated from the NT at this time due to its widespread distribution and biological persistence.

The Finocchiaro CLP Government has finalised the Northern Territory Buffel Grass Weed Management Plan 2026-36, which provides certainty for pastoralists and outlines a strategic path forward to manage its impact on the environment into the future ... “Buffel grass creates significant challenges relating to fire and environmental management and is also an important feed source for pastoralists and their cattle,” said Mr Burgoyne.

Dr Brookhouse and the Snow Gum Summiteers (Snow gum dieback raises fears for largest river system) should look at the history and basic ecology of chronic eucalypt decline or so-called dieback ... Pests, parasites and diseases are symptoms and contributors, not causes of chronic eucalypt decline ... Chronic decline of eucalypts is not a consequence of climate change.

New research has revealed past land clearing is increasing the vulnerability of native Australian forests to the invasive myrtle rust disease — with regrowth forests emerging as hotspots for impact.

The Carp Herpes Virus (scientifically known as Cyprinid herpesvirus 3 or KHV) is a biological control agent proposed by the Australian government to combat the invasive common carp. Since its introduction in the 1800s, carp have decimated Australia's freshwater ecosystems, with experts estimating they make up 80 to 90 per cent of the fish biomass in the Murray-Darling Basin.

New data has revealed the NSW Government is contributing just ‘bits of bacon’ to the desperate effort to curb feral pigs, the state’s peak farm body says. Media reports of 53,000 feral pigs culled by authorities over the past year were dwarfed by the estimated tens of millions of the pests farmers were reporting in the paddock, NSW Farmers’ President Xavier Martin said.

Cane toads are predicted to invade Western Australia’s Pilbara region by 2041 if left unchecked, but the Northern Territory’s population of the pests hold key lessons that could save billions in eradication costs ... academics found the toxic creatures could colonise three quarters of the Pilbara, threatening 25 native species in the biodiversity hotspot.

Satellite imagery and artificial intelligence can detect with high accuracy two invasive weed species in Australia, posing a new opportunity for defense against these pervasive plants. Research conducted by Charles Darwin University (CDU) and Charles Sturt University (CSU) explored the potential for SkySat satellite imagery and AI algorithms to detect and map African lovegrass (Eragrostis curvula) and bitou bush (Chrysanthemoides monilifera ssp. rotundata).

The Territory’s 45 million hectares of cattle country is “some of the most intact” land in Australia, something that pastoral families, over more than a century, have achieved not “by locking the country away ... Romy Carey, CEO of the Northern Territory Cattlemen’s Association, is making a powerful point in her group’s current newsletter, as her $1.5 billion a year industry is facing Chinese trade restrictions and criticism over its position on buffel weed.

Colleen Krestensen. With the repeal of the Kosciuszko Wild Horse Heritage Act 2018 (NSW), the Australian Brumby Alliance and brumby rehoming organisations are deeply concerned that the NSW Government and NPWS will move to quickly slaughter the remaining brumbies by aerial culling or other lethal methods ... The ABA strongly believes that with the brumby population in Kosciuszko National Park now as low as 579 horses, and the perceived density problem addressed, there is time to review how the remaining horses are managed and to make animal welfare an imperative.

The debate about buffel needs to be broadened to take account of the weed's current and future commercial as well as social consequences. The pastoral industry, in love with the irresponsibly introduced plant, has leases over half of the NT, land that is owned by the people of the NT. From 31 December they will have just 43 days to comment on how the government should be dealing with the scourge, declared a weed in 2024, yet still expanding in the region's prime tourism areas.

Alex Nelson. When I moved to Pitchi Richi Sanctuary in October 2022, buffel grass smothered almost the entire site. Aside from a small area around the resident caretaker's cottage, I assessed that buffel grass comprised a minimum of 99.9 per cent of the groundcover across the entire property.

Adam Kerezsy ... the inland rivers of Australia's Murray-Darling Basin are already well-inhabited by invasive – or alien – species ... Unfortunately, in the Lachlan, there’s a new kid on the block. Oriental weatherloach is an eel-like animal from Asia that started off in Australia as an aquarium fish.

An invasive weed not seen in the Lockyer Valley for more than half a century has been detected at Forest Hill, prompting Council to issue an alert. A Lockyer Valley Regional Council contractor recently raised the alarm after stumbling upon an infestation of rubber vine in the rail reserve at Forest Hill.

Whether the risks posed by imports from Australia's trading partners are being sufficiently assessed and addressed, whether we really need to or should import certain products at all, and whether Australia is becoming complacent, resigned, or courting disaster for political Brownie points - such questions are being asked more often. ... This last week, Australia's biosecurity around beef and banana imports was called into question by David Littleproud, Leader of The Nationals and Shadow Agriculture Minister. ARR.News sought a response from Julie Collins, the Minister for Agriculture, Fisheries and Forestry ...