The Convention on Biological Diversity (https://www.cbd.int/) recommends globally protecting ≥ 17% of ecologically representative freshwaters by 2020 to sustain critical ecosystem services and rapidly declining freshwater biodiversity. We examined whether current conservation efforts meet this target for lakes (≥ 1 ha) across the continental U.S. and Environmental Protection Agency ecoregions using the U.S. Protected Areas Database. How one defines lake protection matters: 17.8% of lakes fell within multiuse or strictly protected areas, but only 7.5% of lakes had ≥ 80% of their catchments in strictly protected areas. Protected lakes occurred disproportionately in the lake‐poor western U.S. and most lake‐rich regions fell short of the 17% target. Lakes connected to streams and other lakes were disproportionately protected relative to headwater and isolated lakes, which are important for ecosystem services and biodiversity. Meeting conservation targets requires protecting thousands of additional U.S. lakes and catchments across more diverse ecological settings and explicitly considering connectivity.

中文翻译：

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没有遗留下来的湖泊：美国保护区达到湖泊保护目标的程度如何？

《生物多样性公约》（https://www.cbd.int/）建议到2020年全球保护≥17％的具有生态代表性的淡水，以维持关键的生态系统服务并迅速减少淡水生物多样性。我们使用“美国保护区数据库”检查了整个美国大陆和环境保护局生态区中湖泊（≥1公顷）的当前保护工作是否达到了这一目标。如何定义湖泊保护问题很重要：17.8％的湖泊属于多用途或严格保护区之内，但只有7.5％的湖泊集水量≥80％属于严格保护区。受保护的湖泊在美国西部贫瘠的湖泊中不成比例地出现，大多数湖泊丰富的地区都未达到17％的目标。与上游水域和孤立的湖泊相比，与溪流相连的湖泊和其他湖泊受到的保护比例过高，这对于生态系统服务和生物多样性至关重要。要达到保护目标，就需要在更多样化的生态环境中保护另外数千个美国湖泊和流域，并明确考虑连通性。