Nonnative and Invasive Species

The USGS and partners are conducting environmental DNA (eDNA) research in the Colorado River downstream from Glen Canyon Dam and in Lake Powell to detect invasive fish species and other aquatic threats before they become established. eDNA is a cutting-edge technology that makes it possible to identify invasive species before they are visible, even in vast or hard-to-survey environments like rivers...

The sagebrush biome is one of the largest ecosystems in North America. Encompassing nearly one-third of the continental U.S., it provides critical resources for millions of Americans and a home for hundreds of plants and animal species in the West. Natural resource management in sagebrush ecosystems can be complex, and science can support management decisions by providing knowledge and tools to...

Lake Powell is a large arid reservoir that represents about 70% of the water storage capacity for the Upper Colorado River Basin. It is the second largest reservoir in the United States by capacity (second only to Lake Mead). Lake Powell is an oligotrophic reservoir, which means that nutrient concentrations and algal production are generally low. This often results in very clear-water conditions...

The U.S. Geological Survey Southwest Biological Science Center (SBSC) is uniquely positioned in the Colorado River Basin to provide sound information, specialized expertise, and innovative tools to support the management and sustained use of natural resources on public and Tribal lands in the Southwest U.S.

As public, tribal, and military lands continue to experience rapid change brought on by fire, invasive species, and drought, there is a growing need for science-management partnerships to apply innovative research and technologies to support decision-making at an accelerated pace.

The goal of SBSC's Grand Canyon Monitoring and Research Center’s (GCMRC) riparian vegetation monitoring program is to assess changes and trends in plant species composition and cover and relate those changes to river hydrology, climate, geomorphology, and the operations of Glen Canyon Dam.

The USGS Southwest Biological Science Center is coordinating the Southwest Fire Innovation Landscape Network to prepare fire and natural resource managers for rapidly changing fire landscapes by conducting research and building science-management partnerships. The network develops advanced tools and technologies to assess fuel loads and the effectiveness of fuel treatments, understand wildfire...

Invasive species can harm ecosystems, increase wildfires, damage forests, and outcompete native species. The US Geological Survey's Southwest Biological Science Center conducts research that provides our federal and state partners, cooperators and land managers with the tools, data and strategies to enhance biosecurity management. Scroll through the information below to read about different SBSC...

The United States is developing renewable energy resources, especially solar, at a rapid rate. Although renewable energy development is widely perceived by the public as “green technology,” construction, operation, maintenance, and eventual decommissioning of facilities all have known and potential negative impacts to natural resources, including plant communities and wildlife. This is especially...

The Grand Canyon Monitoring and Research Center, a branch of the Southwest Biological Science Center, conducts scientific assessments of the Colorado River in Grand Canyon, focused primarily on Lake Powell and the river ecosystem downstream of Glen Canyon Dam. On this page, we'd like to share related interactive tools and projects by other USGS Centers that cover science across the upper and lower...

The Restoration Assessment and Monitoring Program for the Southwest (RAMPS) seeks to assist U.S. Department of the Interior (DOI) and other land management agencies in developing successful techniques for improving land condition in dryland ecosystems of the southwestern United States. Invasion by non-native species, wildfire, drought, and other disturbances are growing rapidly in extent and...

In the Upper Colorado River Basin, smallmouth bass ( Micropterus dolomieu) are considered the greatest threat to native fishes and have been linked to declines in federally protected humpback chub ( Gila cypha), including one population that was rapidly extirpated in the past. Long-term management efforts have been underway to remove smallmouth bass from rivers in the Upper Basin, but smallmouth...