Helmstedt Kate J, Possingham Hugh P, Brennan Karl E C, Rhodes Jonathan R, Bode Michael
Ecol Appl. 2014;24(7):1780-92. doi: 10.1890/13-1579.1.
Fences that exclude alien invasive species are used to reduce predation pressure on reintroduced threatened wildlife. Planning these continuously managed systems of reserves raises an important extension of the Single Large or Several Small (SLOSS) reserve planning framework: the added complexity of ongoing management. We investigate the long-term cost-efficiency of a single large or two small predator exclusion fences in the arid Australian context of reintroducing bilbies Macrotis lagotis, and we highlight the broader significance of our results with sensitivity analysis. A single fence more frequently results in a much larger net cost than two smaller fences. We find that the cost-efficiency of two fences is robust to strong demographic and environmental uncertainty, which can help managers to mitigate the risk of incurring high costs over the entire life of the project.
用于排除外来入侵物种的围栏被用于减轻对重新引入的濒危野生动物的捕食压力。规划这些持续管理的保护区系统引发了单一大型或多个小型（SLOSS）保护区规划框架的一个重要扩展：持续管理带来的额外复杂性。我们在澳大利亚干旱地区重新引入兔耳袋狸（Macrotis lagotis）的背景下，研究了一个大型或两个小型捕食者排除围栏的长期成本效益，并通过敏感性分析突出了我们结果的更广泛意义。单个围栏比两个较小的围栏更频繁地导致更高的净成本。我们发现，两个围栏的成本效益对于强烈的人口统计学和环境不确定性具有稳健性，这有助于管理者降低项目整个生命周期内产生高成本的风险。
