The term Blue Carbon (BC) was first coined a decade ago to describe the disproportionately large contribution of coastal vegetated ecosystems to global carbon sequestration. The role of BC in climate change mitigation and adaptation has now reached international prominence.
This review paper assembled leading experts in the field to help prioritise future research, agreeing upon the top-ten pending questions in BC science.
Understanding how climate change affects carbon accumulation in mature BC ecosystems and during their restoration was a high priority. Controversial questions included the role of carbonate and macroalgae in BC cycling, and the degree to which greenhouse gases are released following disturbance in BC ecosystems.
The review show that scientists seek improved precision of the extent of BC ecosystems, techniques to determine BC provenance; understanding of the factors that influence sequestration in BC ecosystems, with the corresponding value of BC; and the management actions that are effective in enhancing this value.
The authors conclude that this overview provides a comprehensive road map of the coming decades of future research in BC.
Macreadie et al. (2019) The future of Blue Carbon science. Nature Communications 10:3998