Decade-Long Project: Restoring Grand Ridge Post-Fire

Project Completion and Background

Recently, our group celebrated the completion of a major project that required over a decade of dedication. The project focused on a site on Grand Ridge Road. This site suffered the most severe impact within the park during the 2009 Black Saturday Churchill fire. As a north-facing slope, it absorbed the full force of the blaze. The fire was subdued by the moister vegetation higher up in the National Park. In other areas of the park, where Mountain Ash forests were burned, the fire’s intensity killed the trees. Yet, tens of thousands of seedlings quickly regenerated. They carpeted the ash bed. Unfortunately, this natural regeneration did not occur at our site. The Mountain Ash trees, planted in the early 1990’s, had grown tall. Still, they had not yet matured enough to flower and set seed. This left the area barren after the fire.

Early Recovery Efforts and Challenges

Once the immediate chaos of the fire subsided, the need for site recovery became clear. Fire recovery authorities responded by planting up to 10,000 seedlings across the site. Yet, this effort faced an unexpected challenge. A large population of hungry Swamp Wallabies consumed all the newly planted seedlings. In hindsight, the best approach would have been to aerially seed the site with overstorey species soon after the fire. This method would better mimic natural regeneration.

Launching Our Project

Four years after the fire, our group took on the challenge directly. We successfully applied for a “Communities for Nature” grant to purchase essential materials. Our previous experience taught us that the only way to protect seedlings until maturity was to use 1.2-meter-tall wire mesh tree guards, supported by star pickets. While effective, these guards were costly and labour-intensive to make, transport, install, and eventually remove.

With the grant, we acquired enough materials to construct 336 tree guards and purchase tube-stock. Additional funding allowed us to trial hand direct seeding at the site. The first plantings, carried out by contractors in 2013, were funded through a previous project. In 2014, after receiving our new grant, we began our on-ground efforts. That year, a crew from Conservation Volunteers Australia helped us construct the tree guards. In 2015, we organized our own working bees to build guards and complete the planting and installation.

Ongoing Maintenance and Outcomes

As time passed, undergrowth at the site increased. This made movement and planting more difficult. It also intensified competition for light and space. By the end of 2015, most planting was finished, and our focus shifted to site maintenance. From 2016 onward, we began removing guards from trees that had grown tall enough to survive unaided. In cases where seedlings died, we replanted as needed.

While most aspects of the project went according to plan, we did face setbacks. The site was initially littered with dead stags of immature Mountain Ash, which sometimes fell and damaged our tree guards. Additionally, the site was exposed, causing some newly planted trees to be blown over by strong winds. This happened despite the trees growing impressively tall. Fortunately, these losses were limited, and overall, our efforts have been a success

Fire Recovery Project Site 27th July 2024

Sycamore Maple Pull Site 2013 and Tutsan Rust

Last Saturday we held a working bee, weeding at a site (which we do annually) where an invasion of Sycamore Maple seedlings entered the Park from a surrounding property. Initially we were pulling out hundreds of new seedling and now the ongoing effort to remove newly detected seedlings is working well. Like last year there was not a lot of Maple to remove and a lot of the time was spent moving through the site to ensure that the area was clean of weeds, (although we did not get cross to the other side of the gully where there are some more Maples growing). The main area where Maple was found was an open disturbed area that also has a very bad Tutsan infestation.

It was interesting to discover that much of the Tustsan in the area was covered by rust with some foliage looking quite heavily impacted. We didn’t notice the rust last year but when I looked back at some photos I took then, I did see that some Tutsan leaves had tell tale rust spots present. Tutsan Rust (Melampsora hypericorum) is a fungus that was found to be very successful in the Otway Ranges in the 1990’s where it had a significant impact on reducing the cover of this shade tolerant invasive weed.

Our site (or somewhere in a close vicinity) had Tutsan Rust artificially introduced a couple of years back and after some follow up inspections It was thought that it had not taken. After a bit of research I found a document that suggested that Tutsan Rust was already present at Tarra Bulga, A report from 1999 describes rust taken from Tarra Bulga (as well as some from the Morwell River area) being used as part of research project. The Tarra Bulga rust was found to impact the plants in the trial to an intermediate level (i.e. OK but not great). Whether or not the rust is from the attempted introduction a couple of years ago (of which I assume was a more virulent strain) or whether it is the same rust that has been around for longer, can probably not be known without complex Laboratory analysis. But we will continue to monitor the site with interest given the threat that Tutsan presents to the park.

As well as the Maple and Tutsan there were new Blackberry seedlings that we carefully hand pulled as well as a few new outbreaks of English Ivy which we need to remain vigilant for. There were some larger clumps of Blackberry that will need to be sprayed.

Reference: Casonato, S, Lawrie, A. and McLaren, D. Biological control of Hypercium androsaemum with Melampsora hypercorum  In ’12th Australian Weeds Conference’. Hobart, Tasmania. (Eds AC Bishop, M Boersma, CD Barnes) pp. 339-342. (CAWSS).

Are you up for the challenge?

Friends of Tarra Bulga have a big new project and we are looking for some enthusiastic helpers to get things off to a great start. A couple of years back a huge infestation of Sycamore Maple trees, which can grow up to 30m tall, was discovered in the park. These trees produce winged seeds which can spread in the wind, so the plant has the potential to invade further into the surrounding Mountain Ash forests.

Contractors were used to cut down the Maples and poison the stumps, and the result so far has been a big success. The canopy has opened up and native understorey plants are taking advantage of the light and space and popping up everywhere. To be a complete success however and to help prevent re-growth of the Maple, canopy species such as Mountain Ash need to be re-established. The friends group has secured funding from the Victorian Government’s, Communities for Nature Grants to do this and are holding a planting day on Saturday August the 11th.

The friends are keen for as many helpers are possible on the day but please note the task is a bit of a challenge. Access to the site is 2.5km along a walking track from the nearest road. The planting site itself is covered in logs and branches of what remains of the dead Sycamore Maple trees. While these branches are an obstacle we also plan to use them to our advantage, by planting amongst them we hope they will act as natural tree guards, keeping the new seedlings out of reach of hungry Swamp Wallabies that are notorious for eating newly planted trees. So if you are ready willing and able please come along. The meeting spot will be at the Tarra Bulga Visitors Centre Carpark at 9am on Saturday August the 11th. Please RSVP to Friends of Tarra Bulga – Activities Co-ordinator David Akers at dakers@activ8.net.au or by phoning 5189 1330. (BYO lunch)

Rough terrain at Planting Site
Rough terrain at Planting Site

Wet Forest
This is what we hope the planting site will eventually look like.