Table 1 Extrapolated results on quantities of carbon, nitrogen, and phosphorous removed annually per site from average annual production and estimated nutrient removal values

	Unit	Site 1	Site 2	Average	National extrapolation^a
Annual production	Tonne year⁻¹	75	196	n.a.	11,121
C sequestered	kg tonne⁻¹ fresh product	70.33	79.71	70.52	n.a.
C sequestered	kg year⁻¹	5296.86	15,622.36	10,459.11	834,275.24
N removed	kg tonne−1 fresh product	2.24	3.87	3.05	n.a.
N removed	kg year⁻¹	168.53	757.73	463.13	33,941.62
Value N removal^b	€ tonne⁻¹ fresh product	42.2	72.0	57.5	n.a.
Value N removal^b	€ year⁻¹	3176.9	14,283.9	8730.4	1,952,790.5
P removed	kg tonne−¹ fresh product	0.28	0.42	0.35	n.a.
P removed	kg year⁻¹	21.10	82.93	52.02	3910.98
Value P removal^b	€ tonne⁻¹ fresh product	9.51	14.40	11.93	n.a.
Value P removal^b	€ year⁻¹	716.0	2814.1	1798.5	46,669.5
Total value nutrient removal	€ year⁻¹	3892.9	17,098.0	10,495.5	1,999,460.0
Population equivalent (N)^c	individuals	51	230	140	10,285

C carbon, N nitrogen, P phosphorous, n.a. not applicable.
^aBased on BIM 2022 figures¹³, i.e., total Irish Pacific oyster production of 11,121 tonnes in 2022.
^bValue per tonne of N and P removed²⁹.
^cNitrogen population equivalent is based on a value of 3.3 kg N treated per person per year25.

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