Aichi Target 11 of the CBD Strategic Plan for Biodiversity commits countries to the effective conservation of areas of importance for biodiversity, through protected areas and “other effective area‐based conservation measures” (OECMs). However, the prevalence and characteristics of OECMs are poorly known, particularly in sites of importance for biodiversity. We assess the prevalence of potential OECMs in 740 terrestrial Key Biodiversity Areas (KBAs) outside known or mapped protected areas across ten countries. A majority of unprotected KBAs (76.5%) were at least partly covered by one or more potential OECMs. The conservation of ecosystem services or biodiversity was a stated management aim in 73% of these OECMs. Local or central government bodies managed the highest number of potential OECMs, followed by local and indigenous communities and private landowners. There was no difference between unprotected KBAs with or without OECMs in forest loss or in a number of state‐pressure‐response metrics.

中文翻译：

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主要生物多样性地区中爱知目标11的“其他有效的基于区域的保护措施”（OECM）的普遍性，特征和有效性

《生物多样性公约生物多样性战略计划》的爱知指标11要求各国通过保护区和“其他有效的基于区域的保护措施”（OECM）有效保护对生物多样性具有重要意义的地区。但是，OECM的流行和特征知之甚少，特别是在对生物多样性具有重要意义的地点。我们评估了在十个国家中已知或已划定的保护区之外的740个陆地关键生物多样性区（KBA）中潜在OECM的流行程度。大多数未受保护的KBA（76.5％）至少部分被一个或多个潜在OECM覆盖。在这些OECM中有73％的管理目标是生态系统服务或生物多样性的保护。地方或中央政府机构管理着数量最多的潜在OECM，其次是地方和土著社区以及私人土地所有者。在有或没有OECM的情况下，未受保护的KBA在森林损失或许多状态压力响应指标方面没有区别。