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23/01/10 New review paper: Temperate marine reserves: global ecological effects and guidelines for future networks

Extract: Available evidence indicates that temperate no-take marine reserves have higher densities, biomass, and species richness of marine biota within their boundaries compared to areas outside reserves. Fish density and biomass in particular are higher in no-take than in adjacent areas, which is consistent with previous analyses (Mosqueira et al. 2000; Côtéet al. 2001; Halpern 2003; Micheli et al. 2004; Claudet et al. 2008). We also found that algal densities are higher inside reserves, which may indicate a trophic effect. In temperate systems, the common grazers such as sea urchins often reach high densities in the presence of fishing because their predators are removed from the system, and thus this result suggests a return to a more intact ecosystem state inside reserves (Behrens & Lafferty 2004).

 

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