USP Electronic Research Repository

Evaluation of coral reef management effectiveness using conventional versus resilience-based metrics

Ford, Amanda K. and Eich, Andreas and McAndrews, Ryan S. and Mangubhai, Sangeeta and Nugues, Maggy M. and Bejarano, Sonia and Moore, Bradley R. and Rico, Ciro and Wild, Christian and Ferse, Sebastian C. A. (2017) Evaluation of coral reef management effectiveness using conventional versus resilience-based metrics. Ecological Indicators, 85 . pp. 308-317. ISSN 1470-160X

Full text not available from this repository.

Abstract

With increasing stressors to coral reefs, defining tools that evaluate their dynamics and resilience is important to interpret system trajectories and direct conservation efforts. In this context, surveys must go beyond conventional monitoring approaches that focus on abundance and biomass of key groups and quantify metrics that better assess ecological processes and ecosystem trajectories. By measuring a variety of conventional (e.g. proportional cover of broad benthic groups, biomass of herbivorous fish) and complementary resilience-based metrics (e.g. algal turf height, coral recruitment rates, juvenile coral densities, herbivorous fish grazing rates), this study evaluated the ecosystem responses to community-based management in Fiji. The study was conducted across three paired tabu areas (periodically closed to fishing) and adjacent fished sites. Conventional metrics reflected no management effect on benthic or herbivorous fish assemblages. In contrast, the complementary metrics generally indicated positive effects of management, particularly within the benthos. Significant differences were observed for turf height (33% lower), coral recruitment rate (159% higher) and juvenile coral density (42% higher) within areas closed to fishing compared to adjacent open reefs. In addition, turf height was inversely related to coral recruitment and juvenile coral density, and longer turfs (≥5 mm) were more competitive in interaction with corals. These results emphasise that conventional metrics may overlook benefits of local management to inshore reefs, and that incorporating complementary resilience-based metrics such as turf height into reef survey protocols will strengthen their capacity to predict the plausible future condition of reefs and their responses to disturbances.

Item Type: Journal Article
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Divisions: Faculty of Science, Technology and Environment (FSTE) > School of Marine Studies
Depositing User: Fulori Nainoca
Date Deposited: 20 Dec 2017 16:38
Last Modified: 30 May 2018 10:31
URI: http://repository.usp.ac.fj/id/eprint/10422
UNSPECIFIED

Actions (login required)

View Item