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A coherent, representative, and bioregional marine reserve network shows consistent change in rocky reef fish assemblages


Knott, NA and Williams, J and Harasti, D and Malcolm, HA and Coleman, MA and Kelaher, BP and Rees, MJ and Schultz, A and Jordan, A, A coherent, representative, and bioregional marine reserve network shows consistent change in rocky reef fish assemblages, Ecosphere, 12, (4) Article e03447. ISSN 2150-8925 (2021) [Refereed Article]

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Copyright Statement

2021 The Authors. Ecosphere published by Wiley Periodicals LLC on behalf of Ecological Society of America. This is an open access article under the terms of the Creative Commons Attribution 3.0 Unported (CC BY 3.0) License, ( permits use, distribution and reproduction in any medium, provided the original work is properly cited.

DOI: doi:10.1002/ecs2.3447


Worldwide, several countries have established coherent, representative, and large-scale networks of marine reserves to conserve biodiversity. Very few have, however, published systematic assessments of the ecological responses to this network protection, hindering broad understanding of their generality, utility, and efficacy. We present data collected from systematic sampling of rocky reef fish assemblages at sites across a network of 27 no-take marine reserve areas (NTMR) and 27 partially protected areas (PPA) nested within multiple marine parks (regional networks) across three Australian bioregions spanning >1000km of coastline (7 latitude) to test the generality of ecological change across this network. We also sampled 18 reference areas (outside of the marine parks) to provide an independent assessment of potential NTMR effects and also to assess whole marine park effects. Baited remote underwater video (BRUV) was used to sample fishes between depths of 2040m over austral winters in four years (2010, 2011, 2015, and 2016). Despite substantial bioregional differences in fish assemblages, large and consistent effects of NTMR protection were detected across all bioregions for a key commercially and recreationally harvested species, Chrysophrys auratus (pink snapper). There were substantial increases in relative abundance of C. auratus in NTMR compared with fished zones through time (effect sizes >150%). The wider assemblage of targeted fish (excluding C. auratus) only showed relatively small effects of protection (~11%) with trends observed for site-attached wrasses (labrids) and planktivores (e.g., commercially fished Scorpis lineolata) that are recreationally and commercially harvested. Furthermore, the relative abundance of non-target or by-catch species generally did not differ among management zones across the bioregional network. These results highlight how NTMR can be used to assess the ecological effects of fishing and wider environmental management, and can be incorporated into ecosystem-based management for reef species more generally. Importantly, the provision of robust evidence of the performance and generality of NTMR over large-spatial scales (e.g., bioregions) provides greater confidence in the expected outcomes from marine reserve networks as a conservation management approach.

Item Details

Item Type:Refereed Article
Keywords:biological diversity, great southern reef, marine protected area, temperate reefs
Research Division:Environmental Sciences
Research Group:Environmental management
Research Field:Conservation and biodiversity
Objective Division:Environmental Management
Objective Group:Coastal and estuarine systems and management
Objective Field:Coastal or estuarine biodiversity
UTAS Author:Williams, J (Dr Joel Williams)
ID Code:146308
Year Published:2021
Web of Science® Times Cited:14
Deposited By:Ecology and Biodiversity
Deposited On:2021-08-30
Last Modified:2021-09-30
Downloads:19 View Download Statistics

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