Journal
AFRICAN JOURNAL OF MARINE SCIENCE
Volume 42, Issue 2, Pages 199-207Publisher
NATL INQUIRY SERVICES CENTRE PTY LTD
DOI: 10.2989/1814232X.2020.1771415
Keywords
beach-user questionnaire; bioclastic sediment; biodiversity; coastal sand; economic valuation; iSimangaliso Wetland Park; replacement cost
Categories
Funding
- South African Association for Marine Biological Research
- National Research Foundation
- iSimangaliso Wetland Park
- Ezemvelo KwaZulu-Natal Wildlife
- Mazda Wildlife Fund
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Coral reefs provide a multitude of goods and services, some of which are difficult to value due to their intangible nature and the absence of markets to ascribe their relative worth. The coral reefs of Sodwana Bay on the northeast coast of South Africa provide several ecological goods and services, of which only two are considered here: namely, sediment generation and sediment entrapment. Both are deemed essential to the functioning of the Sodwana Bay economy. The replacement-cost method was used to estimate the annual financial cost of sediment provided to the study area if it were replaced by dredging. Sediment generation by the coral reefs was valued at R2.6-R4.8 million, and sediment entrapment valued at R71.8-R84.6 million, totalling between R74.4 million and R89.4 million (approximate to$5.6-$6.7 million, at R13.38/US$1) per year.
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