Invasive weeds are a serious threat to biodiversity in Victoria both on land and in aquatic environments.
Weeds compete with native plants for space, nutrients and sunlight. They change the natural diversity and balance of ecological communities. Weeds also affect the function native species have in providing nutrients and habitat for other species.
Weeds that have been introduced into the Australian environment have no natural controls from insects, grazing animals or fungi that feed on them to limit their spread.
There are over 1000 species of weeds occurring on public land in Victoria. A comprehensive list of weeds is available on the Department of Environment and Primary Industries website.
More about weeds
- Weeds often reproduce in a way that allows them to spread over large distances. For example, willows have winged seeds that are carried on the wind tens of kilometers from their source
- Woody weeds, such as blackberry and gorse, shade out native plants and create impenetrable thickets
- Scrambling weeds such as Bridal Creeper, smother native plants and create dense root mats that prevent other plants from accessing adequate moisture and nutrients
- Some exotic grasses out-compete native grasses and can create high fuel loads that can cause greater bushfire intensity
- Some weeds, like the Hawkweed, can produce biochemicals that inhibit the growth of other plants around them
Marine weeds can release large amounts of spores allowing them to reproduce quickly.
Parks Victoria works with the Department of Environment and Primary Industries, other land managers, land owners and community groups to manage weeds in parks.
The four objectives for weed management are to:
- Prevent their spread by making sure equipment and vehicles are clean of seeds and spores
- Eradicate small infestations that are unlikely to have spread beyond a definable boundary
- Contain infestations where they can be prevented from expanding beyond a defined containment line
- Protect assets (e.g. native plants and animals, neighbouring agricultural land) from the impacts of invasive weeds by reducing population densities.
Weed infestations are controlled mainly through the use of chemical sprays. However, in fragile environments such as the alpine peatlands and marine environments, weeds may be pulled manually by hand.
Biological control is another way weeds are controlled. This is when one living species (such as a plant, fungi or insect) is introduced to control an unwanted species. Biological control may be used when weeds are too widespread for chemicals to be used.
12 Nov 2013
Parks Victoria wishes to advise visitors that during the next six weeks there will be weekday access disruptions at the McKenzie River Rainforest Walk in the Bemm River Scenic Reserve, between Orbost and Cann River in East Gippsland. The walk is a popular stopping point for motorists on the Princes…
15 Nov 2013 7:00pm - 2 Mar 2014 9:00pm
Fun, low key club mountain bike racing held on Friday nights over the Summer
14 Dec 2013 9:00am - 15 Dec 2013 5:00pm
Escape to the mountains for a dose of sub-alpine walking before Christmas!! Help out with some track marking and once you reach the summit, relax and soak up wonderful wilderness views. For those who are happy to camp there will be a base-camp at Native Dog Flat for at least…
15 Dec 2013 2:30pm-4:30pm
The Melbourne Tramways Band will be holding their "Christmas Swingalong" recitial at the open air bandstand in Wattle Park in Burwood (weather permitting). Mel 60 J3. Bring your own rug or chair. If a concert is to be cancelled, we will advise Parks Victoria by midday and you may check…
1 Jan 2014 3:00pm-4:00pm
This historical tour provides a unique opportunity to view a cave that is rarely open to the public and is part of the same cave system as the Royal and the Fairy show caves. Lit only by solar-powered pathway lights, you are provided with a helmet and headlight to view…
Sunrise over Mount Buffalo National Park. Thanks to Ranger Andy Channon for get...Sunrise over Mount Buffalo National Park. Thanks to Ranger Andy Channon for getting up early to capture this inspiring view.View post | Fri, 13 Dec 2013 17.09
Ranger Jeremy Tscharke admits to having a passion for snakes and reptiles since...Ranger Jeremy Tscharke admits to having a passion for snakes and reptiles since he was a young boy. So leading the Herpetology Bioscan team in the Alpine NP recently was a dream come true. Although not everyone’s idea of fun, he was lucky enough to do quite a bit of reptile and snake handling during the two week period, like this rather feisty Alpine Copperhead.View post | Fri, 13 Dec 2013 11.38
Parks Victoria’s new crew of seasonal rangers is heading out to parks around the...Parks Victoria’s new crew of seasonal rangers is heading out to parks around the state to help out during its busiest season. The team of 38 rangers includes 11 marine specialists who will be based at various coastal parks and reserves to help with summer visitor programs. Pictured are a group in training at the Barwon Bluff Marine Sanctuary last week.View post | Thu, 12 Dec 2013 16.57
Escape to the mountains for a dose of sub-alpine walking with the Friends of Cob...Escape to the mountains for a dose of sub-alpine walking with the Friends of Cobberas this weekend 14-15 December. Help out with some track marking and once you reach the summit, relax and soak up wonderful wilderness views. Happy campers can stay at Native Dog Flat base-camp for at least one night. For non-campers, accommodation is available about an hour from the site. Visitors and new members most welcome. Email: email@example.com for more details.View post | Wed, 11 Dec 2013 15.52
It’s International Mountain Day today and there’s plenty of mountains, large and...It’s International Mountain Day today and there’s plenty of mountains, large and small, for you to enjoy in Victoria. Only 90 minutes from Melbourne, you’ll feel like you’re scaling to great heights at Cathedral Range State Park. While the park is a mecca for climbers there are tracks that anyone with moderate fitness can have a shot at climbing to the peak and enjoying the spectacular 360 degree views. http://bit.ly/1bun2RCView post | Wed, 11 Dec 2013 09.48