Southwest

Filter Total Items: 81
September 2002 stormwater flow; view oriented upstream at streamgage 08329870, Bear Arroyo at Jefferson Street site.
Date Published: September 20, 2017

The system of drainage channels and natural stream channels in the Albuquerque metropolitan area is a source of concern because of potential local flooding and water-quality problems. Rapid urbanization since 1970 has increased precipitation runoff to these channels, which in many instances return flow to the Rio Grande. As an important element of the City of Albuquerque’s water-resources...

The Little Missouri River, flood plain
Date Published: August 30, 2017

Aquatic Systems Branch scientists analyze rings of riparian trees relating tree growth and establishment to historical flow. We then use the tree rings to reconstruct the flow in past centuries. Flow reconstructions discover the frequency and magnitude of past droughts and floods—information that is essential for management of rivers and water supplies. We also use downscaled climate...

An image of an Ephemeroptera Heptageniidae Epeorus longimanuis.
Date Published: February 2, 2017

Aquatic invertebrates are a key component of freshwater ecosystems, and an understanding of aquatic invertebrate taxonomy is central to freshwater science. The U.S. Geological Survey Aquatic Experimental Lab (AXL) at the Fort Collins Science Center has developed the North American Aquatic Macroinvertebrate Digital Reference Collection (NAAMDRC) to provide users with a graphic tool to aid in...

Dead and dying cottonwoods along the Mojave River, California, following a decrease in the riparian water table
Date Published: January 17, 2017

Drought is killing riparian trees along many rivers in the western United States. The cause can be increasing temperature or decreasing precipitation, flow or water-table elevation. At multiple locations we are relating water availability to physiological measurements of tree survival and water stress, such as ring width, carbon stable isotope ratio and branch hydraulic conductivity. These...

Boulder glacier in 1913.
Date Published: December 12, 2016

Natural resource agencies are challenged not only by climate change impacts on terrestrial and marine resources, but also by related effects on human communities that depend on these lands and waters. These effects include changes in economic activity, subsistence practices, demographic trends, human health, recreation, infrastructure, and community resilience. While there are many policy...

Multi-colored flowers in the Great Basin.
Date Published: December 12, 2016

The Department of Interior (DOI) produces annual estimates of the economic contributions of DOI programs, activities, and services. USGS economists contribute to the annual analysis, and the USGS Information Science Branch has developed an interactive data visualization to display results: https://my.usgs.gov/doidv/.

Bee
Date Published: December 8, 2016

There is a lack of knowledge and understanding of how widespread use of pesticides may affect bees as they move across a diverse agricultural landscape. Studies have shown there are impacts to honey bees due to exposure to pesticides including neonicotinoid insecticides and fungicides, but the effects of these compounds on native pollinators are largely unknown.

A native Colorado bee on a yellow wildflower.
Date Published: December 8, 2016

Beginning in 2012, the USGS collaborated with the USDA to assess the effectiveness of pollinator plantings and how alteration of landscapes has affected native pollinators and potentially contributed to their decline. The 2008 Farm Bill recognized contributions made by pollinators and made conservation of pollinator habitat a priority. The USGS is assessing native bee habitat, diversity, and...

A hiker on the Lower White River Wilderness trail. BLM photo.
Date Published: December 7, 2016

The National Park Service (NPS) preserves and protects more than 84 million acres of important historic, cultural, and natural resources across 401 sites for the enjoyment of present and future generations. Protected resources and landscapes managed by the National Park Service contribute to the societal welfare of the American public, reflected by ecosystem service values derived from their...

Mountain goats in Glacier National Park, Montana
Date Published: December 7, 2016

There is a well-known bias in the location of protected areas both within the US and globally. Lands protected for conservation tend to be located on less productive soils at high elevations far from cities. USGS is exploring whether this ‘high and far’ paradigm applies within protected areas as well. That is, does human modification within lands that already have some degree of protection,...

A Burmese python coiled in the grass in the Everglades.
Date Published: December 4, 2016

Invasive species are considered to be second only to habitat degradation in terms of negative impacts on the Earth’s ecosystems, and our scientists make up a significant proportion of the global expertise in the rapidly-growing problem of invasive reptiles.

Invasive Tamarisk or saltcedar as it is known, growing on the side of a river.
Date Published: December 3, 2016

Due to high rates of disturbance and human activity, streamside or “riparian” areas are prone to colonization and spread of invasive plants. In the western United States, hundreds of thousands of riparian acres are occupied by the invasive shrubs/trees tamarisk and Russian olive, as well as numerous exotic herbaceous plants. Our work focuses on understanding the factors driving the...