Grand Canyon Monitoring and Research Center

Skip to content

Aquatic Ecology Group

Scud, or side swimmer. Gammarus lacustris.

A preserved scud or side-swimmer (Gammarus lacustris), which is consumed by humpback chub and rainbow trout. Live animals are more translucent.

 


The Aquatic Ecology Group studies links between hydrology and food webs to describe and predict ecological responses to river regulation.

Closure of Glen Canyon Dam in 1963 dramatically altered the Colorado River’s physical template including flow, temperature, and sediment regimes.  These alterations to the river’s physical template led to restructuring of the aquatic food webs that support both native fish populations in Grand Canyon and introduced rainbow trout populations in Glen Canyon.  The Aquatic Ecology Group studies links between the Colorado River's physical template and the food webs in Glen, Marble, and Grand Canyon to describe and predict ecological responses to flow management.

 

PROJECTS

Citizen Science Insect Monitoring

Citizen Science Insect Monitoring

Invertebrate Drift

Invertebrate Drift

Primary production modeling

Primary production modeling

Food web studies

Food web studies

 

For questions or comments about any of these projects, please send an email to citizen_science@usgs.gov

 

 

Photo credit: Freshwater Illustrated/ US Geological Survey

Style: Graphical Version | Text Version

Grand Canyon Monitoring & Research Center | 2255 North Gemini Drive Flagstaff, AZ 86001 | Phone: 928.556.7380 Fax: 928.556.7100

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey | Grand Canyon Monitoring and Research Center

Website Questions:
Maps, Imagery and Data Questions:
Last Update: November 3, 2011