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Southwest Biological Science Center

Welcome to the Southwest Biological Science Center (SBSC)! We conduct quality, objective research on the terrestrial and aquatic systems of the Colorado Plateau, Colorado River and its tributaries, drylands across the larger Southwest US, and beyond.

News

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The Drought Data Explorer - Coming Soon

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Incorporating Genetic Diversity into Restoration and Conservation Decision-making

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JOB ALERT! Chief, SBSC's Grand Canyon Monitoring and Research Center

Publications

Field investigation of sub-isokinetic sampling by the US D-96-type suspended-sediment sampler and its effect on suspended-sediment measurements

Collection of accurate suspended-sediment data using depth-integrating samplers requires that they operate isokinetically, that is, that they sample at the local stream velocity unaffected by the presence of the suspended-sediment sampler. Sub-isokinetic suspended-sediment sampling causes grain-size dependent positive biases in the suspended-sediment concentration measured by the suspended-sedimen

Multi-decadal sandbar response to flow management downstream from a large dam—The Glen Canyon Dam on the Colorado River in Marble and Grand Canyons, Arizona

Sandbars are an important resource in the Colorado River corridor in Marble and Grand Canyons, Arizona, downstream from Glen Canyon Dam. Sandbars provide aquatic and riparian habitat and are used as campsites by river runners and hikers. The study area is the Colorado River between Glen Canyon Dam and Diamond Creek, which is about 388 kilometers (241 miles) downstream from the dam. Closure of Glen

Quantifying flow and nonflow management impacts on an endangered fish by integrating data, research, and expert opinion

Managers charged with recovering endangered species in regulated river segments often have limited flexibility to alter flow regimes and want estimates of the expected population benefits associated with both flow and nonflow management actions. Disentangling impacts on different life stages from concurrently applied actions is essential for determining the effectiveness of each action, but diffic

Science

Actionable Science

The Colorado River Basin Pilot Project is exploring new approaches for the USGS to answer complex earth systems questions identified in partnership with stakeholders, which cannot be answered through a single discipline approach. Science coproduction is a method where scientists, managers, policy makers, and other stakeholders first identify specific decisions to be informed by science, and then...
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Actionable Science

The Colorado River Basin Pilot Project is exploring new approaches for the USGS to answer complex earth systems questions identified in partnership with stakeholders, which cannot be answered through a single discipline approach. Science coproduction is a method where scientists, managers, policy makers, and other stakeholders first identify specific decisions to be informed by science, and then...
Learn More

Integrated Science Approach

The USGS has a long history of delivering science and tools to help decision-makers manage and mitigate effects of drought. The timing is critical for the USGS to consolidate its diverse expertise into a single landscape-scale effort to rapidly provide integrated transdisciplinary, targeted data, tools, and models required by decision makers in the Basin. This initiative unifies USGS expertise...
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Integrated Science Approach

The USGS has a long history of delivering science and tools to help decision-makers manage and mitigate effects of drought. The timing is critical for the USGS to consolidate its diverse expertise into a single landscape-scale effort to rapidly provide integrated transdisciplinary, targeted data, tools, and models required by decision makers in the Basin. This initiative unifies USGS expertise...
Learn More

Repeat Photography Archives at the Southwest Biological Science Center

The USGS Southwest Repeat Photography Collection contains repeat imagery taken for a variety of research purposes over the last 100+ years. Repeat photographs are taken at precisely the same location at later times in order to document landscape and other change. To download individual images, click on 'View and Download' on each image within a slideshow. To view the geographic location of images...
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Repeat Photography Archives at the Southwest Biological Science Center

The USGS Southwest Repeat Photography Collection contains repeat imagery taken for a variety of research purposes over the last 100+ years. Repeat photographs are taken at precisely the same location at later times in order to document landscape and other change. To download individual images, click on 'View and Download' on each image within a slideshow. To view the geographic location of images...
Learn More