A recent study has confirmed what locals have long known: Graceville boasts some of the shadiest streets in the city, with Honour Avenue, Bell Terrace and Laurel Avenue ranking highly in research conducted by the University of Southern Queensland.
The study by radiation scientist Nathan Downs assessed footpath shade across ten Brisbane suburbs to determine ultraviolet radiation exposure. Downs, who has spent over two decades researching Queensland’s UV index, highlighted the importance of shade in a state with the world’s highest skin cancer rates.
The research identified 48 tree species across 210 sites, with camphor laurel, Indian beech and golden penda among those providing the most shade. While fig species offer excellent canopy cover, their invasive roots pose a risk to infrastructure. Downs emphasised the significance of mature trees in creating well-shaded streets, stating that the ideal time to plant a tree was “30 years ago, with today being the second-best option.”
Graceville’s abundance of established trees, particularly along Honour Avenue with its century-old camphor laurels, contributes significantly to its cool and inviting atmosphere. This green canopy provides respite from the Queensland sun and enhances the suburb’s aesthetic appeal, particularly during jacaranda season.
However, research from the University of Queensland has revealed a disparity in shade provision across Brisbane. A Dorina Pojani and Sean Patton study found that wealthier suburbs have more tree cover than lower-income areas. This trend, observed in urban environments globally, raises concerns about equity and accessibility. Pojani noted the irony of this situation, as residents in less affluent suburbs often rely more on public transport and, therefore, need greater access to shade.
The researchers stressed the multifaceted benefits of trees, including air purification, water circulation, and wildlife corridors. They also highlighted the role of street trees in providing shade for pedestrians and improving the accessibility of public transport, particularly bus stops, which can be highly uncomfortable in Brisbane’s summer heat.
Brisbane City Council’s research supports this finding, with residents calling for increased shade at bus stops. While the reasons behind the shade discrepancies are still being investigated, Pojani suggests that residents of wealthier suburbs may have more time and resources to advocate for tree planting.
Brisbane City Council reports that 79 percent of residents live in the suburbs with over 20 percent tree cover. The council planted over 11,000 street trees in the last financial year and plans to target areas with lower tree cover in future planting initiatives. Residents can also request trees to be planted on their verge through the council.
Ultimately, as Downs aptly summarises, a liveable city is a city with ample shade. With its lush tree canopy and commitment to preserving its green spaces, Graceville is a prime example for other suburbs to emulate.
Published Date 30-October-2024
