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Southwest

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Filter Total Items: 2,153
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Year Published: 2017

UAV lidar and hyperspectral fusion for forest monitoring in the southwestern USA

Forest vegetation classification and structure measurements are fundamental steps for planning, monitoring, and evaluating large-scale forest changes including restoration treatments. High spatial and spectral resolution remote sensing data are critically needed to classify vegetation and measure their 3-dimensional (3D) canopy structure at the...

Sankey, Temuulen T.; Donager, Jonathon; McVay, Jason L.; Sankey, Joel B.
Sankey, T., Donager, J., McVay, J., and Sankey, J.B., 2017, UAV lidar and hyperspectral fusion for forest monitoring in the southwestern USA: Remote Sensing of Environment, v. 195, p. 30-43, https://doi.org/10.1016/j.rse.2017.04.007.

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Year Published: 2017

The evolution of different maternal investment strategies in two closely related desert vertebrates

We compared egg size phenotypes and tested several predictions from the optimal egg size (OES) and bet-hedging theories in two North American desert-dwelling sister tortoise taxa, Gopherus agassizii and G. morafkai, that inhabit different climate spaces: relatively unpredictable and more predictable climate spaces, respectively. Observed...

Ennen, Joshua R.; Lovich, Jeffrey E.; Averill-Murray, Roy C.; Yackulic, Charles B.; Agha, Mickey; Loughran, Caleb; Tennant, Laura A.; Sinervo, Barry
Ennen, J.R., Lovich, J.E., Averill-Murray, R.C., Yackulic, C.B., Agha, M., Loughran, C., Tennant, L., Sinervo, B., 2017, The Evolution of Different Maternal Investment Strategies in Two Closely Related Desert Vertebrates: Ecology and Evolution, vol. 7, no. 9, p. 3177-3189, http://dx.doi.org/10.1002/ece3.2838.

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Year Published: 2017

Unusual population attributes of invasive red-eared slider turtles (Trachemys scripta elegans) in Japan: do they have a performance advantage?

The slider turtle (Trachemys scripta Thunberg in Schoepff, 1792) is native to the USA and Mexico. Due to the popularity of their colorful hatchlings as pets, they have been exported worldwide and are now present on all continents, except Antarctica. Slider turtles are well-established in Japan and occupy aquatic habitats in urban and agricultural...

Taniguchi, Mari; Lovich, Jeffrey E.; Mine, Kanako; Ueno, Shintaro; Kamezaki, Naoki

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Year Published: 2017

The morphology of transverse aeolian ridges on Mars

A preliminary survey of publicly released high resolution digital terrain models (DTMs) produced by the High Resolution Imaging Science Experiment (HiRISE) camera on Mars Reconnaissance Orbiter identified transverse aeolian ridges (TARs) in 154 DTMs in latitudes from 50°S to 40°N. Consistent with previous surveys, the TARs identified in HiRISE...

Geissler, Paul; Wilgus, Justin T.
Paul E. Geissler and Justin T. Wilgus, 2017, The morphology of transverse aeolian ridges on Mars, Aeolian Research, v. 26, p. 63-71, https://doi.org/10.1016/j.aeolia.2016.08.008.

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Year Published: 2017

Deleterious effects of net clogging on the quantification of stream drift

Drift studies are central to stream and river ecological research. However, a fundamental aspect of quantifying drift — how net clogging affects the accuracy of results — has been widely ignored. Utilizing approaches from plankton and suspended sediment studies in oceanography and hydrology, we examined the rate and dynamics of net clogging across...

Muehlbauer, Jeffrey D.; Kennedy, Theodore A.; Copp, Adam J.; Sabol, Thomas
Muehlbauer, J.D., Kennedy, T.A., Copp, A.J., and Sabol, T.A., 2016, Deleterious effects of net clogging on the quantification of stream drift: Canadian Journal of Fisheries and Aquatic Sciences, v. (online), http://dx.doi.org/10.1139/cjfas-2016-0365.

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Year Published: 2017

Trends in Rainbow Trout recruitment, abundance, survival, and growth during a boom-and-bust cycle in a tailwater fishery

Data from a large-scale mark-recapture study was used in an open population model to determine the cause for long-term trends in growth and abundance of a Rainbow Trout Oncorhynchus mykiss population in the tailwater of Glen Canyon Dam, AZ. Reduced growth affected multiple life stages and processes causing negative feedbacks that regulated the...

Korman, Josh; Yard, Micheal D.; Kennedy, Theodore A.
Korman, J., Yard, M.D., and Kennedy, T.A., 2017, Trends in Rainbow Trout recruitment, abundance, survival, and growth during a boom-and-bust cycle in a tailwater fishery: Transactions of the American Fisheries Society, v. (online), http://dx.doi.org/10.1080/00028487.2017.1317663.

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Year Published: 2017

Turbid releases from Glen Canyon Dam, Arizona, following rainfall-runoff events of September 2013

Glen Canyon Dam is a large dam on the Colorado River in Arizona. In September 2013, it released turbid water following intense thunderstorms in the surrounding area. Turbidity was >15 nephelometric turbidity units (NTU) for multiple days and >30 NTU at its peak. These unprecedented turbid releases impaired downstream fishing activity and...

Wildman, Richard A.; Vernieu, William
Wildman, R.A., and Vernieu, W.S., 2017, Turbid releases from Glen Canyon Dam, Arizona, following rainfall event of September 2013: Lake and Reservoir Management, v. (online), http://dx.doi.org/10.1080/10402381.2017.1293756.

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Year Published: 2017

Variation in species-level plant functional traits over wetland indicator status categories

Wetland indicator status (WIS) describes the habitat affinity of plant species and is used in wetland delineations and resource inventories. Understanding how species-level functional traits vary across WIS categories may improve designations, elucidate mechanisms of adaptation, and explain habitat optima and niche. We investigated differences in...

McCoy-Sulentic, Miles E.; Kolb, Thomas E.; Merritt, David M.; Palmquist, Emily C.; Ralston, Barbara E.; Sarr, Daniel A.
McCoy-Sulentic, M.E., Kolb, T.E., Merritt, D.M., Palmquist, E.C., Ralston, B.E., and Sarr, D.A., 2017, Variation in species-level plant functional traits over wetland indicator status categories: Ecology and Evolution, v. (online), http://dx.doi.org/10.1002/ece3.2975.

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Year Published: 2017

Geomorphological evidence for ground ice on dwarf planet Ceres

Five decades of observations of Ceres suggest that the dwarf planet has a composition similar to carbonaceous meteorites and may have an ice-rich outer shell protected by a silicate layer. NASA’s Dawn spacecraft has detected ubiquitous clays, carbonates and other products of aqueous alteration across the surface of Ceres, but surprisingly it has...

Schmidt, Britney E.; Hughson, Kynan H.G.; Chilton, Heather T.; Scully, Jennifer E. C.; Platz, Thomas; Nathues, Andreas; Sizemore, Hanna; Bland, Michael T.; Byrne, Shane; Marchi, Simone; O'Brien, David; Schorghofer, Norbert; Hiesinger, Harald; Jaumann, Ralf; Hendrick Pasckert, Jan; Lawrence, Justin D.; Buzckowski, Debra; Castillo-Rogez, Julie C.; Sykes, Mark V.; Schenk, Paul M.; DeSanctis, Maria-Cristina; Mitri, Giuseppe; Formisano, Michelangelo; Li, Jian-Yang; Reddy, Vishnu; Le Corre, Lucille; Russell, Christopher T.; Raymond, Carol A.

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Year Published: 2017

Is GPS telemetry location error screening beneficial?

The accuracy of global positioning system (GPS) locations obtained from study animals tagged with GPS monitoring devices has been a concern as to the degree it influences assessments of movement patterns, space use, and resource selection estimates. Many methods have been proposed for screening data to retain the most accurate positions for...

Ironside, Kirsten E.; Mattson, David J.; Arundel, Terence R.; Hansen, Jered R.
Ironside, K.E., Mattson, D.J., Arundel, T.R., and Hansen, J.R., 2017, Is GPS telemetry location error screening beneficial?: Wildlife Biology, v. (online), http://dx.doi.org/10.2981/wlb.00229.

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Year Published: 2017

Potential human impacts of overlapping land-use and climate in a sensitive dryland: a case study of the Colorado Plateau, USA

Climate and land-use interactions are likely to affect future environmental and socioeconomic conditions in drylands, which tend to be limited by water resources and prone to land degradation. We characterized the potential for interactions between land-use types and land-use and climate change in a model dryland system, the Colorado Plateau, a...

Copeland, Stella M.; Bradford, John B.; Duniway, Michael C.; Schuster, Rudy
Copeland, S.M., Bradford, J.B., Duniway, M.C., and Schuster, R.M., Potential human impacts of overlapping land-use and climate in a sensitive dryland: a case study of the Colorado Plateau, USA: Ecosphere, vol. 8, no. 5, http://dx.doi.org//10.1002/ecs2.1823.

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Year Published: 2017

Bedrock and structural geologic maps of eastern Candor Sulci, western Ceti Mensa, and southeastern Ceti Mensa, Candor Chasma, Valles Marineris region of Mars

This map product contains a set of three 1:18,000-scale maps showing the geology and structure of study areas in the western Candor Chasma region of Valles Marineris, Mars. These maps are part of an informal series of large-scale maps and map-based topical studies aimed at refining current understanding of the geologic history of western Candor...

Okubo, Chris H.; Gaither, Tenielle A.
Okubo, C.H., and Gaither, T.A., 2017, Bedrock and structural geologic maps of eastern Candor Sulci, western Ceti Mensa, and southeastern Ceti Mensa, Candor Chasma, Valles Marineris region of Mars: U.S. Geological Survey Scientific Investigations Map 3359, pamphlet 12 p., scale 1:18,000, https://doi.org/10.3133/sim3359.

Filter Total Items: 239
Image: Black Tern
May 2, 2007

Black Tern

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: Salton Sea Sunset
October 1, 2006

Salton Sea Sunset

Sunset on the southeast side of the Salton Sea, CA.

Image: Wilson's Phalarope
August 15, 2006

Wilson's Phalarope

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: Wilson's Phalarope
July 28, 2006

Wilson's Phalarope

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: Western Sandpiper
July 28, 2006

Western Sandpiper

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: Wood Stork
July 28, 2006

Wood Stork

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: Wood Storks
July 28, 2006

Wood Storks

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: Clarks Grebe
July 13, 2006

Clarks Grebe

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: Black-necked Stilt Chick
July 13, 2006

Black-necked Stilt Chick

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: American Avocet on Her Eggs
July 11, 2006

American Avocet on Her Eggs

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: American Avocet Nesting
July 11, 2006

American Avocet Nesting

Birds found in and around the Salton Sea, California.

Attribution: Southwest
Image: Salton Sea Birds
July 11, 2006

Salton Sea Birds

Birds found in and around the Salton Sea, California.

Attribution: Southwest

Nine USGS Science Centers are administered by the Pacific Regional office, which is headquartered in Sacramento, California.