Field‐based Forest Carbon Assessment Griffith University, Gold Coast Campus
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Leopold, Kate
Runkovski, Mark
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Abstract
The native forests of Griffith University contribute a range of ecosystem services and functions including sequestering carbon, and hence are an important component of Griffith University’s Sustainability Goals including United Nations Sustainable Development Goal (UNSDG) 13: Climate Action and UNSDG 15: Life on Land. To estimate the carbon currently stored within the native forests, and potential for future carbon sequestration, field estimation of the carbon sequestered in the forests on the Gold Coast campus of Griffith University was undertaken in 2023. Specifically, Above Ground Biomass was estimated by converting measurements of the height and width of all woody plants and standing dead trees with a Diameter at Breast Height of at least 5 cm along two randomly located 20 x 50 m transects in the dominant Blackbutt forest Regional Ecosystem (RE) using standard allometric calculations. These field values were then converted to tons of Above Ground Carbon per ha (126 t C ha‐1 ) which was then combined with the current area of intake for the forest on‐campus (29.2 ha) to give a final estimate of the amount of Above Ground Carbon (3,679 t carbon) as well as both Above and Below (in roots) Ground Carbon in woody plants (4,672 t carbon). Furthermore, these forests could be contributing to further carbon sequestration at an estimated rate of 85 t ha‐1 y‐1 . These results demonstrate the importance of the forests on the Gold Coast campus in their role as relatively high carbon stocks when compared to other sub‐tropical forest types in Queensland. It also emphasises their role as carbon sinks when they recover from past logging, and other types of disturbance, with an estimated sequestration of carbon at a rate of 85 t ha‐1 y‐1 . However, they could become a source of carbon (losing more than they sequester) if not appropriately managed, including damage to the few remaining large old trees, which are significant carbon stores, with less than 3% of the trees accounting for more than 52% of the carbon stock on the campus. Inappropriate bushfire management is another important risk that could reduce the sequestration potential of these forests.
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© Griffith University 2023.
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Ecology
Climate change impacts and adaptation
Environmental management
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Pickering, C; Leopold, K; Runkovski, M, Field‐based Forest Carbon Assessment Griffith University, Gold Coast Campus, 2023