The Socio-Economics of the West, Central and Southern African Coastal Communities

3.6 Understanding the Relative Shares of Coastal Ecosystem Services

concluding that [no quotation] one hectare of destroyed GCLME mangroves accounts for at least US$ 32,000 (4 per cent discount rate) considering the estimated TEV of mangroves for the next 50 years. 197 Likewise, for the CCLME, the destruction of one hectare of mangroves costs roughly US$ 2,235/ha per year. 198

According to the GCLME and CCLME studies, coastal ecosystems from these regions provide an estimated economic impact of US$ 4.2 billion, excluding the approximations of the coastal tourism impact of US$ 720.8 million for the GCLME and the “coastal and ocean opportunities for tourism” impact of US$ 4.68 billion for the CCLME. 192 Fish nurseries, with an estimated impact of US$ 1.8 billion, and coastal protection, with an estimated value of US$ 1.7 billion, are the most significant coastal ecosystem services for west and central African coastal populations (Figure 22 and appendix G). 193 The GCLME use values of timber and non-timber products, sewage treatment, drinking water, coastal protection and carbon sequestration, combined with the economic impacts of fish nurseries, biodiversity and cultural services, total US$ 2.7 billion. 194 The CCLME use values of timber and non- timber products, sewage treatment, coastal protection and carbon sequestration, combined with the economic impacts of mangrove and seagrass fish nurseries, biodiversity and cultural services, total US$ 1.5 billion. 195 When examined separately, for each of the GCLME and CCLME, coastal protection, fish nurseries and carbon sequestration have the greatest monetary impact (excluding tourism) (Figure 23 and 24 and appendix G). 196 Interwies (2011) approximates the value of mangroves for 50 years,

Sewage Treatment, $43

Non-Timber Products, $99

Timber Products, $18

Cultural Services, $19

Drinking Water, $10

Biodiversity, $19

Costal Protection, $851

Fish Nursery, $1,513

Carbon Sequestration, $153

Figure 23: Economic Shares of the GCLME Coastal Ecosystems (US$ millions per year). Source: Interwies (2011).

Mangrove Biodiversity & Cultural Services, $15 Mangrove Biodiversity & $15

Seagrass Biodiversity & Cultural Services, $2 Seagrass Biodiversity & l $2

Non-Timber Products, $143 1

Timber Products, $26 Timber $

Sewage Treatment, $63

Sewage Treatment, $20 a Non-Timber Products, $45

Timber Products, $8

Seagrass Fish Nurseries, $43 Nurseries, Mangrove Fish Nurseries, $281 Fish $281

Biodiversity & Cultural Services, $55

DrinkingWater, $10

Costal Protection, $1,735 l

Fish Nursery, $1,836 e ,

Costal Protection, $884

Carbon Sequestration, $221

Carbon Sequestration, $374

Figure 22: Economic Shares of the GCLME and CCLME Coastal Ecosystems (US$ millions per year). Source: Interwies (2011) and Interwies and Görlitz (2013).

Figure 24: Economic Shares of the CCLME Coastal Ecosystems (US$ millions per year). Source: Interwies and Görlitz (2013).

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