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Potential soil carbon sequestration (tonnes C) per hectare for Australian coastal wetland ecosystems (saltmarsh, mangrove, and seagrass) in Victoria was calculated from 2020 to 2050 and 2020 to 2100 using the InVEST Coastal Blue Carbon Model v3.7 (Natural Capital Project). Annual carbon sequestration rates for each ecosystem were extrapolated over time to estimate net carbon sequestration. Restored ecosystems had sequestration rates that were initially lower than undisturbed ecosystems but caught up over time. Loss of soil carbon from erosion took place within the first decade after erosion.
This layer represents potential carbon sequestration (tonnes C) per hectare by 2050 under the Erosion of the Top 20th Percentile Risk Area scenario. Coastal areas were ranked based on a relative risk index for erosion using the Victorian Coastal Climate Change Risk Assessment (DELWP 2015). Current coastal ecosystems falling with the areas in the top 20th percentile of risk index ranks were assumed to erode to either mudflat or open water, losing soil carbon. Coastal ecosystems outside of these areas. |