Southwest Biological Science Center

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The Southwest Biological Science Center (SBSC) conducts quality, objective research on the lands and aquatic systems of the Southwest. This research can assist those who manage, conserve, and rehabilitate the arid regions of the nation. Click on SCIENCE in the sidebar to the left to explore SBSC science in more detail.

Terrestrial Dryland Ecology Branch

Terrestrial Dryland Ecology Branch

The Terrestrial Dryland Ecology (TDE) Branch of the SBSC studies the biology, ecology,and processes of semi-arid and arid lands (known as drylands). TDE researchers study plant-soil-water relationships and the wildlife found in drylands.

TDE Science

River Ecosystem Science Branch

River Ecosystem Science Branch

The River Ecosystem Science (RES) Branch of the SBSC, which includes the Grand Canyon Monitoring and Research Center (GCMRC), studies the biology, ecology, and processes of the rivers in the Southwest.

RES (GCMRC) Science

News

Small screens installed perpendicular to the soil surface and native plant seeds being raked into soil
December 28, 2016

A video put out by CBS discusses some of the ecological issues of Arches and Canyonlands National Parks in UT such as nonnative annual grasses, disturbance caused by cattle grazing, and the difficulty of getting native, perennial grasses established. The video focuses on the research of SBSC’s Rebecca Mann and Mike Duniway, who are studying the use connectivity modifiers (ConMods) in restoration.

Sticky Trap for Insects Located on the Banks of a River, at the Confluence of the Litter Colorado River and the Colorado River
December 16, 2016

National Geographic posted a video on their webpage titled, “At 17 Million Years Old, Grand Canyon Still Has Lessons to Teach”. The video focuses on the importance of the Colorado River, mostly from the perspective of participants in the Grand Canyon Youth program, a partner of the Grand Canyon Monitoring and Research Center (GCMRC) (part the Southwest Biological Science Center).

Satellite images showing the condition of vegetation after the 2014 Minute 319 pulse flow.
October 24, 2016

In 2014, a large pulse of water was released into the mostly dry delta of the Colorado River along the U.S.-Mexico border. U.S. Geological Survey scientists are studying the effects of the pulse on the environment as part of a historic, bi-national collaborative effort. The pulse flow and the need to study its effects were accepted as part of the Minute 319 of the 1944 U.S.-Mexico Water Treaty.

Publications

A detached eddy simulation model for the study of lateral separation zones along a large canyon-bound river
Year Published: 2017

A detached eddy simulation model for the study of lateral separation zones along a large canyon-bound river

Lateral flow separation occurs in rivers where banks exhibit strong curvature. In canyon-boundrivers, lateral recirculation zones are the principal storage of fine-sediment deposits. A parallelized,three-dimensional, turbulence-resolving model was developed to study the flow structures along lateralseparation zones located in two pools along the Colorado River in Marble Canyon. The model employs...

Scientific monitoring plan in support of the selected alternative of the Glen Canyon Dam Long-Term Experimental and Management Plan
Year Published: 2017

Scientific monitoring plan in support of the selected alternative of the Glen Canyon Dam Long-Term Experimental and Management Plan

IntroductionThe purpose of this document is to describe a strategy by which monitoring and research data in the natural and social sciences will be collected, analyzed, and provided to the U.S. Department of the Interior (DOI), its bureaus, and to the Glen Canyon Dam Adaptive Management Program (GCDAMP) in support of implementation of the Glen Canyon Dam Long-Term Experimental and Management Plan...

Estimating the settling velocity of bioclastic sediment using common grain-size analysis techniques
Year Published: 2017

Estimating the settling velocity of bioclastic sediment using common grain-size analysis techniques

Most techniques for estimating settling velocities of natural particles have been developed for siliciclastic sediments. Therefore, to understand how these techniques apply to bioclastic environments, measured settling velocities of bioclastic sedimentary deposits sampled from a nearshore fringing reef in Western Australia were compared with settling velocities calculated using results from...