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Social-Ecological Systems Meta-Analysis Database: Component

SummaryGreen turtle (Chelonia mydas) used as a proxy for the impact of MPAs on migratory species
SubtypeNatural Resource Unit
SectorMarine protected areas
Commons AggregationPopulation
Commons BoundariesSomewhat unclear boundaries (2)
ExplanationGenerally have known foraging and nesting grounds (The islands of Nusambier, Iwari, Kuwom, Matas and Wairundi and several mainland beaches have been recorded as turtle nesting beaches). But green turtles are a migratory species and found in tropical and subtropical waters so coded as somewhat unclear.
Commons Indicator["Status of highly migratory species"]
Commons Unit SizeMedium (3)
ExplanationAverage weight of adult individual 68-190Kg
Environmental MediumOceanic
Inter Annual PredictabilityModerate (2)
ExplanationMigratory but likely to return to particular nesting beaches every couple of years. Long-living. But vulnerable to rapid declines year on year if threatened by human activity.
Intra Annual PredictabilityModerate (2)
ExplanationAvailability varies according to season, but these patterns can be predicted. Also population sizes don't fluctuate too much in relation environmental factors.
Commons RenewabilityRenewable (1)
ExplanationBut slow to reproduce - low regeneration rates
ProductivityPoorly productive (1)
ExplanationSlow maturing, high infant mortality
Commons AccessibilityVery accessible (3)
ExplanationTurtles are easy to catch - intentionally or as bycatch. They are predicable with their nesting season when they and their eggs are easy to harvest
Commons HeterogeneityModerate (2)
ExplanationDistributed in tropical and sub-tropical waters. Movements within the marine environment less well understood, but known to use a wide range of broadly separated localities and habitats during their lifetimes. But considered moderate as females return to same nesting beaches.
Commons MobilityHigh (3)
ExplanationMigratory species
Commons Spatial Extent13852
Explanation13852km2 - coded here are size of Cenderwasih NP. But found across the entire info-pacific ocean
Technical SubstituteNo