Tieskens, K.F.

This report will specifically focus on the spatial distribution of the ecosystem service values and will eventually visualize these values geographically in a total economic value map. The total economic value (TEV) of the ecosystems of St Eustatius is the sum of five different and mutually exclusive economic values. All these values have been previously studied and are published in different reports (Cado van der Lely et al. 2014; Fenkl et al. 2014; Van de Kerkhof et al. 2014). In this report we will merely visualize these values geographically and develop the TEV map. The TEV map will then be used to assess whether current spatial planning covers those ecosystems which are most valuable to the economy of St Eustatius.

When the spatial allocation of the economic value of ecosystems is compared to current spatial policies, the main conclusion is that existing boundaries for nature conservation appear to be on the right place. This however does not imply that policy is currently sufficient to conserve nature’s value since we have done no qualitative assessment of actual management. Moreover some very valuable areas of both terrestrial and marine environment are placed outside protective areas.

According to the spatial analyses of the values of St Eustatius’ ecosystems we have formulated the following three recommendations:

• Current protective zoning designations, both marine and terrestrial, are located in such a way that they protect the most valuable natural assets of St Eustatius. It is therefore vital that these zonings and regulations are strictly enforced to maintain the economic value of the ecosystems.

• One area along the slopes of the Quill Volcano could be reassessed for its zoning. According to our analysis this area encompasses some vital ecosystems and construction on this area could be further limited. We therefore recommend further research into this area and presumably a different zoning designation.

• The anchorage zone for NuStar could be reassessment reassessed since it is coinciding with a very valuable part of the coral reef. We recommend to investigate whether it would be possible to locate the anchorage zone further away from valuable coral.

This report will specifically focus on the spatial distribution of the ecosystem values and eventually visualize these values geographically in a total economic value map. The total economic value (TEV) of the ecosystems of Saba is the sum of several different and mutually exclusive economic values. All these values have been previously studied and are published in different reports (Cado van der Lely et al. 2014; Dekker et al. 2014; Van de Kerkhof et al. 2014). In this report we will merely visualize these values geographically and add up the values to create the TEV map. The TEV map will then be used to assess whether current spatial planning covers those ecosystems which are most valuable to the economy of Saba.

The TEV map has clearly demonstrated that for the marine and the terrestrial ecosystems of Saba, the economic value is highly concentrated on relatively small areas. On the island the economic value is mostly concentrated on the slopes of Mount Scenery. This value can for a large part be attributed to what tourist spend and are willing to pay for a vacation enjoying the natural beauty of trails around Mount Scenery. The marine value can almost solely be attributed to the coral reefs of the coastal waters of Saba.

Although, there are several policies in place to manage the areas with high economic value on the terrestrial grounds of Saba, there is no authority that is in charge and responsible for the conservation of certain economically valuable natural areas. To guarantee the sustainability of the concentrated economic value on Mount Scenery, the management of this area could be more sufficiently embedded within the institutional framework of local spatial policy.

The current zoning of the Saba marine park is concurrent with the spatial distribution of economic value. However, some reefs which add a significant value to the economy of Saba are located within the less protective zoning of ‘Multipurpose’. A light alteration to the zoning including this area in the ‘no take’ zoning could provide optimal protection of the coral reef and thus retain the economic value of the marine park. 

Map (GIS) showing the economic values of marine ecosystems on Saba for:

• Carbon sequestration
• Cultural and local recreational value
• Tourism

See this report for more information

For illustration, the excerpt below shows the carbon sequestration:

Map (GIS) showing the economic values of terrestrial ecosystems on Saba for:

• Carbon sequestration
• Cultural and local recreational value
• Archeology

See this report for more information

For illustration, the excerpt below shows the carbon sequestration:

Map (GIS) showing the economic values of marine ecosystems on St.Eustatius for:

• Carbon sequestration
• Cultural and local recreational value
• Fisheries
• Tourism

See this report for more information

For illustration, the excerpt below shows the total economic value:

Map (GIS) showing the economic values of terrestrial ecosystems on St. Eustatius for:

• Carbon sequestration
• Cultural and local recreational value
• Archeology

See this report for more info.

For illustration, the excerpt below shows the total economic value