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Social-Ecological Systems Meta-Analysis Database: Component

Summarydensity per trophic group is used as a proxy for ecosystem health. The reefs in the NWHI are among the few remaining large-scale, intact, predator-dominated reef ecosystems left in the world, with 54% of the total fish biomass in the NWHI consisting of apex predators (Friedlander & DeMartini 2002)
SubtypeNatural Resource System
SectorMarine protected areas
Commons BoundariesSomewhat unclear boundaries (2)
ExplanationSome species are habitat-associated species and tend to mirror patterns in habitat cover. However, the resource is mobile horizontally and vertically and often crosses administrative boundaries (e.g., zoning) so is considered to have somewhat unclear boundaries.
Environmental MediumOceanic
Inter Annual PredictabilityModerate (2)
Intra Annual PredictabilityModerate (2)
Commons RenewabilityRenewable (1)
ExplanationSome high trophic species are slow to reproduce
ProductivityModerately Productive (2)
ExplanationMost fish species would be moderate to highly productive. However, some can be very slow growing taking years to mature and reproduce hence the evaluation here that the resource is moderately productive.
Commons AccessibilitySomewhat accessible (2)
ExplanationBy boat and plane only, with permission.
Commons HeterogeneityModerate (2)
Commons Spatial Extent362601
Explanationarea of NWHI
Technical SubstituteNo
ExplanationThere is no technical substitute or manmade technology that can take the place of the different trophic densities within the NWHI.