Abstract Systematic conservation planning requires that quantitative targets be set for both biodiversity pattern and processes. While the challenge of setting quantitative representation targets has been well addressed in the literature, guidelines for conceptualising and setting process targets are lacking. Process targets can be defined as the minimum amount of natural habitat that must remain to ensure the long-term survival of the majority of species. While a representation target may represent the majority of species in a landscape, this target often falls far short of conserving processes necessary for the persistence of these species. This paper explores the potential for landscape ecology research to provide useful insights into developing process targets by relating critical thresholds in habitat amount to the probability of population persistence. It is proposed that these thresholds provide a basis for developing generic top-down ecological process targets in conservation planning. The percolation threshold, theoretically defined at 59%, is increasingly used to inform research into ecological state-shifts and ecosystem resilience. This threshold may provide a basis for developing top-down process targets in instances where comprehensive bottom-up spatial data on individual ecological processes is unavailable. In the context of ongoing global habitat loss, this approach provides a pragmatic, but also potentially biologically meaningful, way of incorporating defensible and quantitative ecological process targets or biodiversity persistence goals into conservation plans.

中文翻译：

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使用景观破碎化阈值确定系统保护计划中的生态过程目标

摘要 系统的保护规划要求为生物多样性格局和过程设定量化目标。虽然在文献中已经很好地解决了设定定量表示目标的挑战，但缺乏概念化和设定过程目标的指南。过程目标可以定义为为确保大多数物种的长期生存而必须保留的最少自然栖息地。虽然代表性目标可能代表景观中的大多数物种，但该目标通常远未达到这些物种持续存在所需的保护过程。本文探讨了景观生态学研究的潜力，通过将栖息地的临界阈值与种群持久性的概率相关联，为制定过程目标提供有用的见解。建议这些阈值为在保护规划中制定通用的自上而下的生态过程目标提供基础。理论上定义为 59% 的渗透阈值越来越多地用于为生态状态变化和生态系统恢复力的研究提供信息。在无法获得关于单个生态过程的自下而上的综合空间数据的情况下，该阈值可以为制定自上而下的过程目标提供基础。在全球栖息地持续丧失的背景下，这种方法提供了一种务实的，但也具有潜在的生物学意义，