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Benefits of integrating complementarity into priority threat management

机译：将互补性纳入优先级威胁管理的好处

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Conservation decision tools based on cost-effectiveness analysis are used to assess threat management strategies for improving species persistence. These approaches rank alternative strategies by their benefit to cost ratio but may fail to identify the optimal sets of strategies to implement under limited budgets because they do not account for redundancies. We devised a multiobjective optimization approach in which the complementarity principle is applied to identify the sets of threat management strategies that protect the most species for any budget. We used our approach to prioritize threat management strategies for 53 species of conservation concern in the Pilbara, Australia. We followed a structured elicitation approach to collect information on the benefits and costs of implementing 17 different conservation strategies during a 3-day workshop with 49 stakeholders and experts in the biodiversity, conservation, and management of the Pilbara. We compared the performance of our complementarity priority threat management approach with a current cost-effectiveness ranking approach. A complementary set of 3 strategies: domestic herbivore management, fire management and research, and sanctuaries provided all species with >50% chance of persistence for $4.7 million/year over 20 years. Achieving the same result cost almost twice as much ($9.71 million/year) when strategies were selected by their cost-effectiveness ranks alone. Our results show that complementarity of management benefits has the potential to double the impact of priority threat management approaches.
机译：基于成本效益分析的保护决策工具用于评估威胁管理策略，以改善物种的持久性。这些方法按成本与成本之比对替代策略进行排名，但可能无法确定在有限预算下要实施的最佳策略集，因为它们没有考虑到冗余。我们设计了一种多目标优化方法，在该方法中，应用互补性原理来确定可在任何预算下保护最多物种的威胁管理策略集。我们使用我们的方法为澳大利亚Pilbara的53种保护性关注点确定了威胁管理策略的优先级。在为期3天的研讨会上，我们与49位利益相关者和皮尔巴拉（Pilbara）生物多样性，保护与管理专家合作，采用了结构化的启发方法来收集有关实施17种不同保护策略的收益和成本的信息。我们将互补优先威胁管理方法与当前成本效益排名方法的性能进行了比较。这三种策略的补充：国内食草动物管理，火灾管理和研究以及保护区为所有物种提供了50％的持久性机会，在20年中的年收益为470万美元。仅根据成本效益等级来选择战略，要达到相同的结果几乎要花费两倍的费用（每年971万美元）。我们的结果表明，管理优势的互补性有可能使优先威胁管理方法的影响加倍。

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