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Protecting endangered species: do the main legislative tools work?

Katherine E Gibbs1, David J Currie

  • 1Ottawa-Carleton Institute of Biology, University of Ottawa, Ottawa, Ontario, Canada. katiemgibbs@gmail.com

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Summary

Assessing endangered species recovery tools under the U.S. Endangered Species Act (ESA) reveals weak links between conservation actions like funding and recovery status. Poor data quality may hinder accurate effectiveness assessments.

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Area of Science:

  • Conservation Biology
  • Wildlife Management
  • Environmental Policy

Background:

  • The U.S. Endangered Species Act (ESA) utilizes tools such as funding, recovery plans, and critical habitat designation to aid species recovery.
  • Previous research indicated statistically significant but not necessarily biologically meaningful effects of these conservation tools.
  • A critical need exists to evaluate the actual impact and effectiveness of recovery tools on endangered species.

Purpose of the Study:

  • To quantify the relationship between the application of ESA recovery tools and the improvement in recovery status for listed species.
  • To determine if the effects of conservation tools are biologically significant for endangered species recovery.
  • To assess the adequacy of species recovery data for evaluating conservation tool effectiveness.

Main Methods:

  • Analysis of species status reports to Congress from 1988 to 2006 for 1179 listed species.
  • Quantification of two recovery measures for each species.
  • Correlation of recovery measures with federal funding, years with recovery plans, critical habitat designation, scientific information, and time listed.

Main Results:

  • The change in recovery status for listed species showed only a very weak relationship with the studied conservation tools.
  • Recovery showed a positive association with years listed, recovery plan presence, and funding, but these factors explained less than 13% of the variation in recovery status.
  • Effect sizes, when considered, were small, similar to findings in earlier studies that focused on statistical significance rather than biological meaningfulness.

Conclusions:

  • The analyzed conservation tools appear to have limited effectiveness in promoting species recovery.
  • The poor quality and inadequacy of species population status data likely prevent a reliable assessment of conservation tool effectiveness.
  • Improving data collection for population status is crucial for accurately evaluating and enhancing endangered species recovery efforts.