A global assessment of the direct and indirect benefits of marine protected areas for coral reef conservation

Strain, Elisabeth M.A., Edgar, Graham J., Ceccarelli, Daniela, Stuart-smith, Rick D., Hosack, Geoffrey R., and Thomson, Russell J. (2019) A global assessment of the direct and indirect benefits of marine protected areas for coral reef conservation. Diversity and Distributions, 25 (1). pp. 9-20.

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Abstract

Aim: Marine protected areas (MPAs) are increasingly implemented to conserve or restore coral reef biodiversity, yet evidence of their benefits for enhancing coral cover is limited and variable.

Location: 30 MPAs worldwide and nearby sites (within 10 km).

Taxa: Cover of key functional groups for coral (total, branching, massive and tabular), and algae (total, filamentous, foliose) and total biomass of reef fish trophic groups (excavator, scraper, browser, higher carnivore).

Methods: We used a global dataset obtained using standardized survey methods at 465 sites associated with 30 MPAs in 28 ecoregions to test the effects of five key MPA attributes (>10 years old, well‐enforced, no‐take, large and isolated) on coral cover, algal cover and reef fish biomass. We also tested the direct (reducing disturbance by human activities) versus indirect pathways (increasing grazing potential through recovering populations of herbivorous fishes) by which MPAs can influence coral and algal cover.

Results: Only well‐enforced, no‐take and old (>10 years) MPAs had higher total coral cover (response ratio 1.08–1.19×) than fished sites, mostly due to the increased cover of massive coral growth forms (1.34–2.06×). This effect arose through both the direct influence of protection and indirect benefits of depressed algal cover by recovering herbivorous fish biomass. Neither the direct (standardized coefficient = 0.06) nor indirect effects (standardized coefficient = 0.04) of no‐take protection on coral cover were particularly strong, likely reflecting regional differences in fishing gear, targeted species and trophic webs.

Conclusions: MPAs promote the persistence of some functional groups of corals, and thus represent an important management tool, globally.

Item ID: 57001
Item Type: Article (Research - C1)
ISSN: 1472-4642
Keywords: algal cover, fish biomass, herbivorous fishes, impacts of fishing, marine reserves, predatory fishes, Reef Life Survey, trophic interactions
Copyright Information: © 2018 John Wiley & Sons Ltd
Funders: Commonwealth Environment Research Facilities (CERF) program, Ian Potter Foundation (IPF), Australian Research Council (ARC), Institute for Marine and Antarctic Studies (IMAS), Marine Biodiversity Hub, National Environmental Research Council - Australian Government (NERC)
Date Deposited: 30 Jan 2019 07:38
FoR Codes: 05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050206 Environmental Monitoring @ 100%
SEO Codes: 96 ENVIRONMENT > 9605 Ecosystem Assessment and Management > 960507 Ecosystem Assessment and Management of Marine Environments @ 100%
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