Southwest Biological Science Center

Aquatic Ecosystems

Filter Total Items: 33
Date published: June 11, 2019
Status: Active

GCMRC Data Applications

The Grand Canyon Monitoring and Research Center develops and collaborates with other science centers to create online data applications that provide access to project data as it becomes available to the public.  Some of these applications provide data in near real-time, while other project data are updated at some regular interval (annually, quarterly).  

Content listed here include...

Date published: June 11, 2019
Status: Active

GCMRC Data Releases

Data releases made available by GCMRC can be found here as they are published via the USGS Fundamental Science Practices (FSPs).  Individual science product links will take users to the USGS ScienceBase website for each entry.

 

Click on Data and Tools Tab to see list of Data Releases.

Date published: April 29, 2019
Status: Active

GCMRC Data and Tools

The Grand Canyon Monitoring and  Research Center offers a collection of data resources and online tools -- including web maps, applications, and other content -- that convey scientific information related to on-going monitoring of the Colorado River.  Some applications are a culmination of long-term monitoring work, while others are developed around more a specific set of information usually...

Date published: April 24, 2019
Status: Active

Grand Canyon Monitoring and Research Projects

The Grand Canyon Monitoring and Research Center currently functions under a Triennial Work Plan (TWP) which is thoroughly reviewed and vetted both internally within the Center and through the GCDAMP Technical Work Group (TWG) and the Adaptive Management Work Group (AMWG).  These advisory panels have been a part of the Glen Canyon Dam...

Date published: September 30, 2018
Status: Active

Measuring Suspended-Sediment Concentrations, Grain Sizes, and Bedload using Multiple Single-Frequency Acoustic Doppler Profilers and Echologgers in the Lower Chippewa River, Wisconsin.

The Upper Mississippi River (UMR) provides critical habitat for hundreds of aquatic species and provides Minnesota with a transportation link to the rest of the world. Reliable measurements of sediment are important for making decisions as part of maintaining the channel. In 2014, sediment deposition in the navigation channel caused channel closures of the UMR delaying commercial navigation...

Contacts: David J Dean
Date published: May 14, 2017
Status: Active

Rainbow Trout Abundance and Movement in the Colorado River in Grand Canyon

Just below Glen Canyon Dam on the Colorado River is a very popular Blue Ribbon trout fishery known for its rainbow trout. However, approximately 78 miles downstream, near were the Little Colorado River flows into the Colorado River, is a population of endangered humpback chub. The introduced rainbow trout can negatively affect native humpback chub by competing with them for food (immature...

Contacts: Charles Yackulic, Josh Korman
Date published: February 28, 2017
Status: Active

Amazon Dams Network: Advancing Integrative Research and Adaptive Management of Social-Ecological Systems Transformed by Hydroelectric Dams

The overall goal of this project is to advance inter- and trans-disciplinary research coordination, focusing on the transformation of social-ecological systems by hydroelectric dam construction in the Amazon and the United States. The experience gained by Southwest Biological Science Center researchers working on the...

Contacts: Theodore Melis, Simone Athyade, Bette Loiselle, David Kaplan, Stephanie Bohlmann
Date published: February 9, 2017
Status: Active

Invertebrate Drift Downstream of Colorado River Basin Dams

Aquatic invertebrates are critical food for fish and other species that inhabit large rivers. In the Colorado River Basin, invertebrates that get transported down the river (“in the drift”) are particularly important to rainbow trout and other species of interest to recreational users. This research seeks to compare rivers downstream of large dams throughout the Colorado River Basin in order...

Date published: January 18, 2017
Status: Active

Citizen Science Light Trapping in Grand Canyon

Aquatic insects are commonly used to gauge the health of stream and river ecosystems, yet collecting enough samples to adequately characterize a river segment as long as the Colorado River through Grand Canyon (> 250 miles) would be essentially impossible using traditional sampling methods. Since 2012, our group has been collaborating with river guides, private boaters, and educational...

Date published: January 18, 2017
Status: Active

Uncovering the Base of the Food Web: Primary Production Dynamics in the Colorado River

Algae, phytoplankton, and rooted macrophytes represent the base of many aquatic food webs and are known as primary producers. Through photosynthesis, these organisms convert sunlight energy into chemical energy (i.e., carbon) that in turn fuels the growth of animals such as macroinvertebrates and fish. This project uses high frequency measurements of dissolved oxygen, which is a by-product of...

Date published: December 30, 2016
Status: Active

River Sediment Dynamics

Sediment controls the physical habitat of river ecosystems.  Changes in the amount and areal distribution of different sediment types cause changes in river-channel form and river habitat.  The amount and type of sediment suspended in the water column determines water clarity.  Understanding sediment transport and the conditions under which sediment is deposited or eroded from the various...

Date published: December 30, 2016

Southwestern Riparian Zones, Tamarisk Plants, and the Tamarisk Beetle

Introductions of bio-control beetles (genus Diorhabda) are causing defoliation and dieback of exotic Tamarix spp. in riparian zones across the western U.S., yet the factors that determine the plant communities that follow Tamarix decline are poorly understood. In particular, Tamarix-dominated soils are often higher in nutrients, organic matter, and salts than nearby soils, and these soil...