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Southwest Exotic Plant Information Clearinghouse

The Internet Map Server (IMS) visually displays the non-native, invasive plants (weed) occurrences in the current (2003) SWEMP database. An IMS allows you to interactively draw, query, and print maps. The SWEMP IMS was developed from ESRI's ArcIMS presentation product.The Southwest Exotic Plant Information Clearinghouse is a cooperative effort More...

  • SWEMP IMS Screenshot, United States Map

Past, Recent, and 21st Century Vegetation Change in the Arid Southwest

The purpose of this research project is to document vegetation change in the arid lands of the southwestern United States. The project compiles data on past and present plant distributions. These plant distributions are combined with data on past, present, and future climates to predict future plant distributions. The project requires four major More...

  • Creosote Bush (Larrea tridentata)

Progress on the Across Trophic Level System Simulation (ATLSS) Program

This web resource describes the U.S. Geological Survey (USGS) Across Trophic Level System Simulation (ATLSS) Program, which has produced a set of models, including spatially explicit species index models, population demography models, and ecosystem process models that are designed to evaluate the ecological effects of hydrologic scenarios on More...

  • ATLSS High Resolution Multi-Source Topography (HMDT).