To combat biodiversity loss in the United States, imperiled species are protected under the federal Endangered Species Act (ESA), which is currently threatened by political initiatives seeking to weaken it and potentially transfer substantial authority to the states. To assess the conservation capacity of current state laws, we conducted a quantitative analysis of imperiled species protection within all 50 states by compiling data on all state‐listed species, ESA‐listed species, and IUCN Red List species in each state. We found that currently 16% of ESA‐listed species and 52% of IUCN imperiled species are not protected by any state law, and if the ESA were repealed these numbers could increase to 73% of ESA‐listed species and 81% of IUCN imperiled species unprotected. Although protection varies widely among states, our results suggest that revoking the ESA would be highly detrimental to imperiled species conservation and recovery in the United States.

中文翻译：

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保护或灭亡：对国家级物种保护的定量分析支持保存《濒危物种法》

为了与美国的生物多样性丧失作斗争，受联邦保护的濒危物种法（ESA）保护了受威胁的物种，目前该法案受到旨在削弱生物多样性并可能将实质性权力转移给各州的政治倡议的威胁。为了评估当前州法律的保护能力，我们通过汇总每个州的所有国家列名物种，ESA列名物种和IUCN红色名录物种的数据，对所有50个州的濒危物种保护进行了定量分析。我们发现，目前有16％的ESA所列物种和52％的IUCN濒危物种不受任何州法律的保护，如果废除ESA，这些数字可能会增加到ESA所列物种的73％和IUCN受威胁的81％未受保护的物种。尽管各州之间的保护差异很大，