The DOI matches its Crossref record; 7 of the 7 references it cites were found in a registry or an index.
The worldwide costs of marine protected areas
Open accessAbstract
Declines in marine harvests, wildlife, and habitats have prompted calls at both the 2002 World Summit on Sustainable Development and the 2003 World Parks Congress for the establishment of a global system of marine protected areas (MPAs). MPAs that restrict fishing and other human activities conserve habitats and populations and, by exporting biomass, may sustain or increase yields of nearby fisheries. Here we provide an estimate of the costs of a global MPA network, based on a survey of the running costs of 83 MPAs worldwide. Annual running costs per unit area spanned six orders of magnitude, and were higher in MPAs that were smaller, closer to coasts, and in high-cost, developed countries. Models extrapolating these findings suggest that a global MPA network meeting the World Parks Congress target of conserving 20–30% of the world's seas might cost between $5 billion and $19 billion annually to run and would probably create around one million jobs. Although substantial, gross network costs are less than current government expenditures on harmful subsidies to industrial fisheries. They also ignore potential private gains from improved fisheries and tourism and are dwarfed by likely social gains from increasing the sustainability of fisheries and securing vital ecosystem services.
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The value of the world's ecosystem services and natural capital
Costanza, R., d'Arge, R., de Groot, R., Farber, S., Grasso, M., Hannon, B., Limburg, K., Naeem, S., O'Neill, R. V., Paruelo, J., et al. (1997) · Nature · doi:10.1038/387253a0 · Cited by 22,585
Pauly, D., Christensen, V., Dalsgaard, J., Froese, R., & Torres, F. (1998) · Science · doi:10.1126/science.279.5352.860 · Cited by 4,743
Towards sustainability in world fisheries.
Pauly, D., Christensen, V., Guénette, S., Pitcher, T. J., Sumaila, U. R., Walters, C. J., Watson, R., & Zeller, D. (2002) · Nature · doi:10.1038/nature01017 · Cited by 3,019
Rapid worldwide depletion of predatory fish communities
Myers, R. A., & Worm, B. (2003) · Nature · doi:10.1038/nature01610 · Cited by 2,969
Marine biodiversity hotspots and conservation priorities for tropical reefs
Roberts, C. M., McClean, C. J., Veron, J. E. N., Hawkins, J. P., Allen, G. R., McAllister, D. E., Mittermeier, C. G., Schueler, F. W., Spalding, M., Wells, F., et al. (2002) · Science · doi:10.1126/science.1067728 · Cited by 1,691
Collapse and conservation of shark populations in the Northwest Atlantic
Baum, J. K., Myers, R. A., Kehler, D. G., Worm, B., Harley, S. J., & Doherty, P. A. (2003) · Science · doi:10.1126/science.1079777 · Cited by 1,197
Collapse and recovery of marine fishes
Hutchings, J. A. (2000) · Nature · doi:10.1038/35022565 · Cited by 912
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Integrating economic costs into conservation planning
NAIDOO, R., BALMFORD, A., FERRARO, P., POLASKY, S., RICKETTS, T., & ROUGET, M. (2006) · Trends in Ecology & Evolution · doi:10.1016/j.tree.2006.10.003 · Cited by 892
Self-citationMcCarthy, D. P., Donald, P. F., Scharlemann, J. P. W., Buchanan, G. M., Balmford, A., Green, J. M. H., Bennun, L. A., Burgess, N. D., Fishpool, L. D. C., Garnett, S. T., et al. (2012) · Science · doi:10.1126/science.1229803 · Cited by 680
Self-citationTargeting global conservation funding to limit immediate biodiversity declines
Waldron, A., Mooers, A. O., Miller, D. C., Nibbelink, N., Redding, D., Kuhn, T. S., Roberts, J. T., & Gittleman, J. L. (2013) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.1221370110 · Cited by 625
Decadal trends in marine reserves reveal differential rates of change in direct and indirect effects
Babcock, R. C., Shears, N. T., Alcala, A. C., Barrett, N. S., Edgar, G. J., Lafferty, K. D., McClanahan, T. R., & Russ, G. R. (2010) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.0908012107 · Cited by 580
Metadata
- Authors
- Balmford, A., Gravestock, P., Hockley, N., McClean, C. J., & Roberts, C. M.
- Venue
- Proceedings of the National Academy of Sciences
- Published
- 2004-06-17
- Volume
- 101
- Issue
- 26
- Pages
- 9694-9697
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- OpenAlex
- W2122032662
- Cited by
- 328
- References
- 7
- FWCI
- 55.89
- Type
- journal article
- Language
- en
- Open access
- green
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- Balmford, A., Gravestock, P., Hockley, N., McClean, C. J., & Roberts, C. M. (2004). The worldwide costs of marine protected areas. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.0403239101
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