Blue Carbon Financing of Mangrove Conservation in the Abidjan Convention Region: A Feasibility Study

Gabon

145,700

Mangrove area – year 0

368.30

C density top m of soil (Mg/ha)

87.80

C density of above + below ground biomass (Mg/ha)

$38

Above ground land value (US$/ha)

Years (end of)

Present value

1

2

3

20

144,680

143,660

142,655

126,597

Area of Blue Carbon (ha)

1,020

1,006

999

886

Area lost (ha) @0.7%/yr

375,629

370,370

367,778

326,379

Soil carbon exposed (Mg)

18,781

37,300

55,689

349,322

Soil carbon cumulative loss (Mg)

89,547

88,294

87,676

77,806

Biomass carbon lost (Mg)

108,329

125,594

143,364

427,128

Total C emitted (Mg)

110,256

127,494

145,252

428,803

Carbon benefit of conservation (Mg)

$33,717,149

$330,769

$382,482

$435,755

$1,286,409

C value at US$ 3/tCO 2 e, 5%

$56,195,248

$551,281

$637,471

$726,258

$2,144,016

C value at US$ 5/tCO 2 e, 5%

$24,983,267

$330,769

$382,482

$435,755

$1,286,409

C value at US$ 3/tCO 2 e, 8%

$41,638,779

$551,281

$637,471

$726,258

$2,144,016

C value at US$ 5/tCO 2 e, 8%

$406,953

$26,517

$27,166

$27,989

$41,124

Cost to conserve ($25/ha estab., US$ 1/yr), 5%

$3,530,115

$243,756

$247,483

$252,840

$338,379

Cost to conserve ($232/ha estab., US$ 7/yr), 5%

$313,988

$26,517

$27,166

$27,989

$41,124

Cost to conserve ($25/ha estab., US$ 1/yr), 8%

$2,738,104

$243,756

$247,483

$252,840

$338,379

Cost to conserve ($232/ha estab., US$ 7/yr), 8%

$4,106,740

$38,756

$76,970

$114,916

$720,838

Opportunity cost, 5%

$2,928,482

$38,756

$76,970

$114,916

$720,838

Opportunity cost, 8%

High carbon price

Low carbon price

Net Benefit of Conservation (million US$)

8%

8%

5%

5%

$38.4

$21.7

$51.7

$29.2

Low cost of conservation

$36.0

$19.3

$48.6

$26.1

High cost of conservation

52