Ecosystems and underlying biodiversity frequently ensure sustained welfare by reducing the risk associated with detrimental biological agents. This attribute is commonly termed biological control, but its valuation is usually underrepresented in the ecosystem services literature. In our study, a unique valuation method is applied, based on the natural insurance value of biological control and its contribution to expected welfare, evaluating its importance in mitigating ecosystem users’ welfare loss under uncertain conditions. The study tests the feasibility of a conceptual valuation model using the Mediterranean Sea as a case study by assessing the properties of indigenous species to mitigate the impact of invasive species. The results show that varying the levels of indigenous ecosystem components governs the probability of potential welfare loss and its associated value to ecosystem users. While an increase in indigenous biomass levels results in an increase in the total value of biological control, positive values of insurance are achieved only at a certain biomass level, from which the welfare uncertainty of ecosystem users is gradually reduced. Below such levels, the ecosystem component responsible for mitigating risk does not supply any insurance values, as it increases the certainty of low welfare for ecosystem users.

生态系统和潜在的生物多样性通常通过减少与有害生物制剂相关的风险来确保持续的福利。该属性通常被称为生物控制，但其价值在生态系统服务文献中通常不足。在我们的研究中，基于生物控制的自然保险价值及其对预期福利的贡献，应用了一种独特的评估方法，以评估其在不确定条件下缓解生态系统使用者的福利损失的重要性。这项研究通过评估土著物种的特性来减轻入侵物种的影响，以地中海为案例，测试了概念性估值模型的可行性。结果表明，改变土著生态系统组成部分的水平控制着潜在的福利损失及其对生态系统使用者的相关价值的可能性。虽然土著生物量水平的提高导致生物防治总价值的增加，但只有在一定生物量水平上才能实现保险的正值，由此逐步减少了生态系统使用者的福利不确定性。低于此级别，负责减轻风险的生态系统组件不会提供任何保险价值，因为它增加了生态系统用户低福利的确定性。从而逐渐减少了生态系统使用者的福利不确定性。低于此级别，负责减轻风险的生态系统组件不会提供任何保险价值，因为它增加了生态系统用户低福利的确定性。从而逐渐减少了生态系统使用者的福利不确定性。低于此级别，负责减轻风险的生态系统组件不会提供任何保险价值，因为它增加了生态系统用户低福利的确定性。