NOAA-TDC Dual-Flow Framework
NSW Oyster ESG
Asset Attribution
Quantifying the ecosystem service value of oyster aquaculture across New South Wales estuaries — nitrogen removal, carbon sequestration, and habitat provision.
36
Active production
2,718 ha
OISAS designated
15,444 kg
2022-23 statewide
A$4.7M
DAF-adjusted (Tier 1)
About the Model
Ecosystem Service Valuation for NSW Oyster Aquaculture
The ESG Asset Attribution Model (EAAM) adapts the NOAA-TDC Dual-Flow Framework for Australian oyster aquaculture. It quantifies the environmental value generated within Priority Oyster Aquaculture Areas (POAA) across five service vectors: nitrogen removal, phosphorus removal, carbon sequestration, and habitat provision (commercial and recreational).
Using data from the NSW DPI Fisheries Spatial Data Portal, FarmDecisionTECH environmental sensors, the Reef Credit Scheme, and peer-reviewed research, the model provides per-area ESV estimates with transparent data quality adjustments via the DAF/REDQS framework.
Five Service Vectors
What We Measure
Each vector is independently calculated, DAF-adjusted, and assigned a confidence level. Together they form the Total ESV for each lease area.
Nitrogen Removal
SRO: 5.58 kg/t
Reef Credit: A$100/kg
HighPhosphorus Removal
SRO: 0.69 kg/t
Reef Credit: A$100/kg
MediumCarbon (Shell)
0.4 kg CO₂/kg shell
ACCU: A$34/t CO₂e
MediumHabitat: Commercial
A$1,200/ha/yr
Midpoint estimate
MediumHabitat: Recreational
A$600/ha/yr
Midpoint estimate
Medium