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United States annual state-level population estimates from colonization to 1999
The U.S. landscape has undergone substantial changes since Europeans first arrived. Many land use changes are attributable to human activity. Historical data concerning these... -
Invasive Species Areas of Extreme Concern: Streams
Streams where populations of New Zealand Mudsnails have been confirmed. Created as a featureclass and linear event table based on the current version of the National Hydrography... -
Invasive Species Areas of Extreme Concern: Waterbodies
Rivers and Lakes in Washington where known populations of New Zealand mudsnails (Potamopyrgus antipodarum) exist upstream or in the immediate watershed. Originally created from... -
Invasive Species Areas of Extreme Concern: Watersheds
Watersheds where populations of the New Zealand mudsnail (Potamopyrgus antipodarum) have been found or are likely to be found due to proximity to known populations. Based on...