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Alert Risk Maps Released Across the United States Since June 2018

By Wetland and Aquatic Research Center
Map of the United States with red dots indicating the geographic position of all USGS Alert Risk Maps created
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Detailed Description

USGS Alert Risk Maps (ARMs) display lakes, river reaches, and other water bodies potentially at risk of invasion by a new non-native species. The ARMs span the conterminous U.S.

Sources/Usage

Public Domain.