In the Russell–Mulgrave catchment south of Cairns, the results of two years of environmental investment can be seen in the landscape – and in the people now better equipped to care for it.

When the Reef Coastal Restoration Project (RCREST) concluded in April, thousands of native trees and shrubs were growing along waterways and new sediment-control infrastructure was in place. Madjaybana Rangers had gained new qualifications and practical experience, relationships had been strengthened with cane growers and landholders, and a new community nursery remained, with capacity to grow thousands of locally propagated native plants for future restoration.

These are some of the lasting outcomes of RCREST, which brought together Madjandji Traditional Owners, landholders, researchers and regional organisations to improve the health of waterways flowing through the Russell–Mulgrave catchment towards the Great Barrier Reef.

Rather than treating individual environmental problems in isolation, the project worked across the landscape – tackling invasive species, restoring riparian vegetation, reducing sediment and nutrient movement, monitoring biodiversity and water quality, and building local capability to continue that work.

The result demonstrates that successful environmental investment can do more than deliver outcomes during the life of a project. It can leave behind the skills, infrastructure, relationships and knowledge that make future environmental work possible.

Growing restoration locally

One of the most tangible examples is a new community nursery established with the Madjandji Aboriginal Corporation. Developed with capacity for up to 30,000 native seedlings, it provides local infrastructure to propagate plants for restoration on Madjandji Country and surrounding landscapes.

For restoration projects in the Wet Tropics, growing locally has practical advantages. Plants can be selected from species suited to the local environment and propagated closer to where they will eventually be planted.

It also reduces reliance on plants transported into the region from large external suppliers and creates opportunities for knowledge, skills and expenditure associated with restoration to remain locally.

That local approach was put into practice during RCREST. Around 4,000 native plants representing 40 species were established at project sites, with reported survival exceeding 99%. Species were selected for their ecological, cultural and wildlife values as well as their ability to stabilise banks and restore riparian habitat.

Along Nirringa Creek, revegetation is helping transform previously degraded areas into a more complex native riparian corridor. The creek connects with a major drain that ultimately enters the Russell River, linking local restoration work with the broader catchment.

For landholders, those revegetated areas can also become assets rather than ongoing weed and maintenance liabilities.

Building the people as well as the landscape

The project’s investment in people was equally deliberate.

Six Madjaybana Rangers completed Certificate III qualifications in Conservation and Ecosystem Management, alongside additional training in areas including pest management and crocodile safety. The Madjaybana Rangers work within the Madjandji Aboriginal Corporation and delivered many of RCREST’s on-ground activities on Country.

Those skills were put directly into practice, with Rangers undertaking invasive tilapia control, feral pig management, revegetation, ecological monitoring and other field activities throughout the project.

By its conclusion, project teams had removed more than 1,500 invasive spotted tilapia from agricultural drains and more than 230 feral pigs from the broader project area. Bird surveys conducted over 18 months recorded 37 species, providing a baseline for monitoring how wildlife responds as revegetated areas mature.

The significance of that training extends beyond the individual RCREST activities. Equipment can be purchased and plants can be put in the ground during a funding period, but building an experienced local workforce means the knowledge required to undertake future restoration, pest management and monitoring remains available after that period finishes.

Farmers as partners

RCREST also depended on something that cannot simply be purchased: the participation of the people who manage the land.

Five landholders collaborated with the project, alongside the Babinda Drainage Board, River Improvement Trust, Cairns Canegrowers and Madjandji Aboriginal Corporation. That cooperation gave researchers and Rangers access to working agricultural landscapes, brought landholder knowledge into the design and delivery of interventions, and generated substantial in-kind support from participating cane growers.

That matters because much of the land influencing water flowing towards the Great Barrier Reef is also productive land. Environmental interventions need to work within those landscapes rather than around them.

The project’s approach was therefore deliberately practical. Four sediment traps were installed to intercept material moving through agricultural drainage systems, revegetation targeted areas where native vegetation could stabilise banks and improve habitat, and drone technology allowed large areas to be surveyed rapidly and at very high resolution. Pest management was timed and targeted to make the best use of people and equipment.

In several cases, one intervention produced benefits beyond the problem it was originally designed to address. Sediment traps, for example, also created barriers that restricted invasive tilapia movement during low-water periods, helping Rangers concentrate fish for removal.

High-resolution drones used to map waterways and tilapia activity also reduced the amount of manual field searching required to locate fish aggregations, allowing control effort to be targeted more precisely.

Together, these approaches point to an important principle: cost-effectiveness is not necessarily about doing less. It can come from designing different activities to work together.

Making environmental investment work harder

That principle runs throughout RCREST.

Environmental investment can create value well beyond the individual activities it directly funds. When skills, infrastructure, knowledge and relationships are developed locally, they can continue supporting environmental work long after a particular activity has been completed.

A nursery doesn’t simply provide plants for one revegetation project; it creates infrastructure for future restoration.

Training doesn’t simply provide labour for one project; it increases the capability of a local Ranger workforce.

Working closely with cane growers doesn’t simply provide access to a project site; it builds relationships that can support future collaboration.

And technology such as drones can make monitoring faster and more targeted while generating information that improves subsequent management decisions.

The project also demonstrates the value of combining different kinds of expertise. Traditional Owners bring knowledge of Country and a long-term interest in its management. Cane growers understand their properties and drainage systems. Researchers bring scientific methods and monitoring. Regional organisations understand the relationships, constraints and opportunities that connect them.

RRRC Managing Director Sheriden Morris said the project’s achievements reflected the willingness of those partners to work across conventional boundaries between conservation, agriculture, science and land management.

Building on what RCREST started

There is still much to learn.

Newly revegetated waterways will take years to mature. Invasive tilapia require continued suppression. Restored habitat needs to be monitored, and the environmental benefits of individual interventions need to continue to be measured.

But RCREST has left the region better equipped to do that work.

Madjaybana Rangers have additional qualifications and practical experience. Nursery infrastructure is in place to support future restoration. Relationships have been established with cane growers and regional organisations, while restored sites, monitoring data and practical management techniques can inform what happens next.

RCREST was funded by the Australian Government and led by the Reef and Rainforest Research Centre, working in partnership with the Madjandji Aboriginal Corporation RNTBC, participating landholders and regional organisations.

The project demonstrates the lasting value that environmental investment can create when it builds local capability alongside environmental outcomes.

Perhaps the measure of a successful environmental investment is not only what it delivers today, but what it makes possible tomorrow.