Decision support for the Ecosystem-Based Management of a Range-Extending Species in a Global Marine Hotspot Presents Eff
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Decision support for the EcosystemBased Management of a RangeExtending Species in a Global Marine Hotspot Presents Effective Strategies and Challenges Lucy M. Robinson,1,2,7* Martin P. Marzloff,1,6 Ingridvan Putten,3,4 Gretta Pecl,1,4 Sarah Jennings,4,8 Sam Nicol,5 Alistair J. Hobday,3,4 Sean Tracey,1,4 Klaas Hartmann,1 Marcus Haward,1,4 and Stewart Frusher4 1 Institute for Marine and Antarctic Studies, Hobart, TAS 7001, Australia; 2Oceans Institute and Oceans Graduate School, The University of Western Australia, Perth 6009, Australia; 3CSIRO Oceans and Atmosphere, Hobart, TAS 7000, Australia; 4Centre for Marine Socioecology, University of Tasmania, Hobart, TAS 7000, Australia; 5CSIRO Land and Water, Dutton Park, QLD 4102, Australia; 6DYNECO Benthic Ecology Laboratory (LEBCO), CS 10070, IFREMER Centre de Bretagne, 29280 Plouzane´, France; 7CSIRO Oceans and Atmosphere, Crawley, WA 6009, Australia; 8Tasmanian School of Business and Economics, University of Tasmania, Hobart, TAS 7000, Australia
ABSTRACT Climate-driven changes in ocean currents have facilitated the range extension of the long-spined sea urchin (Centrostephanus rodgersii) from Australia’s mainland to eastern Tasmania over recent decades. Since its arrival, the destructive grazing of the urchin has led to widespread formation of sea urchin ‘barrens’. The loss of habitat, biodiversity and productivity for important commercial reef species in conjunction with the development of an urchin fishery has led to conflicting objectives among some stakeholders that pose complex chal-
Received 7 August 2018; accepted 24 January 2019
Electronic supplementary material: The online version of this article (https://doi.org/10.1007/s10021-020-00560-1) contains supplementary material, which is available to authorised users. Author contributions: LR, GP and SF conceived and planned the study. LR, MM, IP, SJ, ST, KH, SN, AH and MH contributed to method development and/or implementation. LR and MM performed analyses and generated the results. LR prepared the figures and manuscript with substantive inputs from MM and edits from all other authors. *Corresponding author; e-mail: [email protected]
lenges for regional management. Stakeholders representatives and managers were engaged via a participatory workshop and subsequent one-onone surveys to trial a structured decision making process to identify effective ecosystem-based management strategies. We directly and indirectly elicited each preferences for nine alternative management strategies by presenting them with the 10-year consequences of each strategy estimated from an ecosystem model of Tasmanian reef communities. These preferences were included in cost-effectiveness scores that were averaged (across stakeholders) to enable strategy ranking from most to least cost-effective. Rankings revealed strategies that included sea urchin removal or translocation of predatory lobsters were the most cost-effective. However, assessment of stakeholders’ individual cost-effectiveness scores showed some disparity among prefe
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