SBSC Fact Sheets
USGS Southwest Biological Science Center scientists produce fact sheets that summarize decades of research.
Related
Select the links below to access GCMRC Fact Sheets:
Filter Total Items: 27
A river of change—The Rio Grande in the Big Bend region A river of change—The Rio Grande in the Big Bend region
The Big Bend region is located within the heart of the Chihuahan Desert of North America. Within this region, the Rio Grande, referred to as the Rio Bravo in Mexico, is the international border between the United States and Mexico. The area known as the Big Bend is named after the large northerly bend that the river makes before flowing southeast to the Gulf of Mexico. This region is
Authors
David J. Dean
The transformation of dryland rivers: The future of introduced tamarisk in the U.S. The transformation of dryland rivers: The future of introduced tamarisk in the U.S.
Tamarix spp. (tamarisk or saltcedar), a shrub-like tree, was intentionally introduced to the U.S. from Asia in the mid-1800s. Tamarisk thrives in today’s human-altered streamside (riparian) habitats and can be found along wetlands, rivers, lakes, and streams across the western U.S. In 2001, a biological control agent, Diorhabda spp. (tamarisk leaf beetle), was released in six states, and...
Authors
Pamela L. Nagler, Julia B. Hull, Charles van Riper, Patrick B. Shafroth, Charles B. Yackulic
Managing sand along the Colorado River to protect cultural sites downstream of Glen Canyon Dam Managing sand along the Colorado River to protect cultural sites downstream of Glen Canyon Dam
The construction of Glen Canyon Dam in northern Arizona has greatly reduced the supply of sand to the Colorado River corridor through Glen Canyon National Recreation Area and Grand Canyon National Park, hereafter referred to as Glen Canyon and Grand Canyon, respectively. This deficit has strongly affected the natural sediment cycle in this iconic landscape and has lowered the...
Authors
Terri Cook, Amy E. East, Helen Fairley, Joel B. Sankey
Effects of water temperature, turbidity, and rainbow trout on humpback chub population dynamics Effects of water temperature, turbidity, and rainbow trout on humpback chub population dynamics
Humpback chub (Gila cypha Miller 1946), found only in the Colorado River Basin, was one of the first species to be given full protection under the Endangered Species Act of 1973. Habitat alterations, such as changes in flow and water temperature caused by dams, and the introduction of nonnative fish have contributed to population declines in humpback chub and other native fish. These...
Authors
Charles Yackulic, Julia B. Hull
Water clarity of the Colorado River—Implications for food webs and fish communities Water clarity of the Colorado River—Implications for food webs and fish communities
The closure of Glen Canyon Dam in 1963 resulted in drastic changes to water clarity, temperature, and flow of the Colorado River in Glen, Marble, and Grand Canyons. The Colorado River is now much clearer, water temperature is less variable throughout the year, and the river is much colder in the summer months. The flow—regulated by the dam—is now less variable annually, but has larger...
Authors
Nicholas Voichick, Theodore A. Kennedy, David J. Topping, Ronald E. Griffiths, Kyrie Fry
Nearshore temperature findings for the Colorado River in Grand Canyon, Arizona: possible implications for native fish Nearshore temperature findings for the Colorado River in Grand Canyon, Arizona: possible implications for native fish
Since the completion of Glen Canyon Dam, Arizona, in 1963, downstream water temperatures in the main channel of the Colorado River in Glen, Marble, and Grand Canyons are much colder in summer. This has negatively affected humpback chub (Gila cypha) and other native fish adapted to seasonally warm water, reducing main-channel spawning activity and impeding the growth and development of...
Authors
Robert P. Ross, William S. Vernieu
Related
Select the links below to access GCMRC Fact Sheets:
Filter Total Items: 27
A river of change—The Rio Grande in the Big Bend region A river of change—The Rio Grande in the Big Bend region
The Big Bend region is located within the heart of the Chihuahan Desert of North America. Within this region, the Rio Grande, referred to as the Rio Bravo in Mexico, is the international border between the United States and Mexico. The area known as the Big Bend is named after the large northerly bend that the river makes before flowing southeast to the Gulf of Mexico. This region is
Authors
David J. Dean
The transformation of dryland rivers: The future of introduced tamarisk in the U.S. The transformation of dryland rivers: The future of introduced tamarisk in the U.S.
Tamarix spp. (tamarisk or saltcedar), a shrub-like tree, was intentionally introduced to the U.S. from Asia in the mid-1800s. Tamarisk thrives in today’s human-altered streamside (riparian) habitats and can be found along wetlands, rivers, lakes, and streams across the western U.S. In 2001, a biological control agent, Diorhabda spp. (tamarisk leaf beetle), was released in six states, and...
Authors
Pamela L. Nagler, Julia B. Hull, Charles van Riper, Patrick B. Shafroth, Charles B. Yackulic
Managing sand along the Colorado River to protect cultural sites downstream of Glen Canyon Dam Managing sand along the Colorado River to protect cultural sites downstream of Glen Canyon Dam
The construction of Glen Canyon Dam in northern Arizona has greatly reduced the supply of sand to the Colorado River corridor through Glen Canyon National Recreation Area and Grand Canyon National Park, hereafter referred to as Glen Canyon and Grand Canyon, respectively. This deficit has strongly affected the natural sediment cycle in this iconic landscape and has lowered the...
Authors
Terri Cook, Amy E. East, Helen Fairley, Joel B. Sankey
Effects of water temperature, turbidity, and rainbow trout on humpback chub population dynamics Effects of water temperature, turbidity, and rainbow trout on humpback chub population dynamics
Humpback chub (Gila cypha Miller 1946), found only in the Colorado River Basin, was one of the first species to be given full protection under the Endangered Species Act of 1973. Habitat alterations, such as changes in flow and water temperature caused by dams, and the introduction of nonnative fish have contributed to population declines in humpback chub and other native fish. These...
Authors
Charles Yackulic, Julia B. Hull
Water clarity of the Colorado River—Implications for food webs and fish communities Water clarity of the Colorado River—Implications for food webs and fish communities
The closure of Glen Canyon Dam in 1963 resulted in drastic changes to water clarity, temperature, and flow of the Colorado River in Glen, Marble, and Grand Canyons. The Colorado River is now much clearer, water temperature is less variable throughout the year, and the river is much colder in the summer months. The flow—regulated by the dam—is now less variable annually, but has larger...
Authors
Nicholas Voichick, Theodore A. Kennedy, David J. Topping, Ronald E. Griffiths, Kyrie Fry
Nearshore temperature findings for the Colorado River in Grand Canyon, Arizona: possible implications for native fish Nearshore temperature findings for the Colorado River in Grand Canyon, Arizona: possible implications for native fish
Since the completion of Glen Canyon Dam, Arizona, in 1963, downstream water temperatures in the main channel of the Colorado River in Glen, Marble, and Grand Canyons are much colder in summer. This has negatively affected humpback chub (Gila cypha) and other native fish adapted to seasonally warm water, reducing main-channel spawning activity and impeding the growth and development of...
Authors
Robert P. Ross, William S. Vernieu