The effectiveness of the Endangered Species Act: a quantitative analysis

  • Taylor M
  • Sucking K
  • Rachlinski J
  • 24

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Abstract

Population trends for 1095 species listed as threatened and endangered under the Endangered Species Act were correlated with the length of time the species were listed and the presence or absence of critical habitat and recovery plans. Species with critical habitat for two or more years were more than twice as likely to have an improving population trend in the late 1990s, and less than half as likely to be declining in the early 1990s, as species without. Species with dedicated recovery plans for two or more years were significantly more likely to be improving and less likely to be declining than species without. The proportion of species improving increased, and the proportion declining decreased, with increasing time listed throughout the 1990s, irrespective of critical habitat and recovery plans. On the basis of these results, we recommend increased funding for earlier listing of imperiled species and prompt provision of critical habitat and recovery plans.

Author-supplied keywords

  • biodiversity
  • endangered species
  • environmental policy
  • population biology

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Authors

  • Martin F. J. Taylor

  • Kieran F. Sucking

  • Jeffrey J. Rachlinski

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