Threatened Amphibians, Global

Threatened amphibians measures the percentage of freshwater amphibian species classified by IUCN as threatened. Higher values indicate more fragile freshwater ecosystems and may be more likely to be subject to water withdrawal and discharge regulations.

The percentage of amphibian species classified by IUCN as threatened in a particular area. For each catchment, the total number of threatened freshwater amphibian species was counted and divided by the total number of freshwater amphibian species whose ranges overlap the catchment. Catchments with fewer than two amphibian species were excluded.

Awareness around the physical, regulatory, and reputational water risks to companies and their investors is on the rise and robust, comparable and comprehensive data is needed to help assess these water-related risks. In response to this demand, the World Resources Institute developed the Aqueduct Water Risk Atlas, including 12 global indicators and maps of water-related risk. Companies can use this information to prioritize actions, investors to leverage financial interest to improve water management, and governments to engage with the private sector to seek solutions for more equitable and sustainable water governance.

The Aqueduct Water Risk Atlas makes use of a framework of 12 global indicators grouped into three categories of risk and one overall score. Aqueduct Global Maps 2.1 include indicators of water quantity, water variability, water quality, public awareness of water issues, access to water, and ecosystem vulnerability. The data used for the study were developed in consultation with experts and are publicly available. The details of the data, sources, and methodology are provided in the Aqueduct Global Maps 2.1 metadata document available online at http://wri.org/publication/aqueduct-metadata-global-21 .