Publications
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Geochemical evidence for a complex origin for the Kelso dunes, Mojave National Preserve, California USA
The Kelso Dune field in southern California is intriguing because although it is of limited areal extent (~ 100 km2), it has a wide variety of dune forms and contains many active dunes (~ 40 km2), which is unusual in the Mojave Desert. Studies over the past eight decades have concluded that the dunes are derived primarily from a single source, Mojave River alluvium, under a dominant...
Authors
Daniel R. Muhs, Nicholas Lancaster, Gary L. Skipp
Operationalizing the telecoupling framework for migratory species using the spatial subsidies approach to examine ecosystem services provided by Mexican free-tailed bats
Drivers of environmental change in one location can have profound effects on ecosystem services and human well-being in distant locations, often across international borders. The telecoupling provides a conceptual framework for describing these interactions—for example, locations can be defined as sending areas (sources of flows of ecosystem services, energy, or information) or receiving...
Authors
Laura Lopez Hoffman, James Diffendorfer, Ruscena Widerholt, Wayne E. Thogmartin, Gary McCraken, Rodrigo A. Medellín, Kenneth J. Bagstad, Amy M. Russell, Darius J. Semmens
A general modeling framework for describing spatially structured population dynamics
Variation in movement across time and space fundamentally shapes the abundance and distribution of populations. Although a variety of approaches model structured population dynamics, they are limited to specific types of spatially structured populations and lack a unifying framework. Here, we propose a unified network-based framework sufficiently novel in its flexibility to capture a...
Authors
Christine Sample, John Fryxell, Joanna A. Bieri, Paula Federico, Julia E. Earl, Ruscena Wiederholt, Brady J. Mattsson, Tyler Flockhart, Sam Nicol, James Diffendorfer, Wayne E. Thogmartin, Richard A. Erickson, D. Ryan Norris
Onshore industrial wind turbine locations for the United States
This dataset provides industrial-scale onshore wind turbine locations in the United States, corresponding facility information, and turbine technical specifications. The database has wind turbine records that have been collected, digitized, locationally verified, and internally quality controlled. Turbines from the Federal Aviation Administration Digital Obstacles File, through product...
Authors
James Diffendorfer, Roger W. Compton, Louisa Kramer, Zachary H. Ancona, Donna Norton
A trans-national monarch butterfly population model and implications for regional conservation priorities
1. The monarch has undergone considerable population declines over the past decade, and the governments of Mexico, Canada, and the United States have agreed to work together to conserve the species.2. Given limited resources, understanding where to focus conservation action is key for widespread species like monarchs. To support planning for continental-scale monarch habitat restoration...
Authors
Karen S. Oberhauser, Ruscena Wiederholt, James Diffendorfer, Darius J. Semmens, Leslie Ries, Wayne E. Thogmartin, Laura López-Hoffman, Brice X. Semmens
The Carolina Sandhills: Quaternary eolian sand sheets and dunes along the updip margin of the Atlantic Coastal Plain province, southeastern United States
The Carolina Sandhills is a physiographic region of the Atlantic Coastal Plain province in the southeastern United States. In Chesterfield County (South Carolina), the surficial sand of this region is the Pinehurst Formation, which is interpreted as eolian sand derived from the underlying Cretaceous Middendorf Formation. This sand has yielded three clusters of optically stimulated...
Authors
Christopher S. Swezey, Bradley A. Fitzwater, G. Richard Whittecar, Shannon A. Mahan, Christopher Garrity, Wilma B. Alemán‑González, Kerby M. Dobbs
Deglacial temperature history of West Antarctica
The most recent glacial to interglacial transition constitutes a remarkable natural experiment for learning how Earth’s climate responds to various forcings, including a rise in atmospheric CO2. This transition has left a direct thermal remnant in the polar ice sheets, where the exceptional purity and continual accumulation of ice permit analyses not possible in other settings. For...
Authors
Kurt M. Cuffey, Gary D. Clow, Eric J. Steig, Christo Buizert, T.J. Fudge, Michelle Koutnik, Edwin D. Waddington, Richard B. Alley, Jeffrey P. Severinghaus
Concentrations of mineral aerosol from desert to plains across the central Rocky Mountains, western United States
Mineral dusts can have profound effects on climate, clouds, ecosystem processes, and human health. Because regional dust emission and deposition in western North America are not well understood, measurements of total suspended particulate (TSP) from 2011 to 2013 were made along a 500-km transect of five remote sites in Utah and Colorado, USA. The TSP concentrations in μg m−3 adjusted to...
Authors
Richard L. Reynolds, Seth Munson, Daniel Fernandez, Harland L. Goldstein, Jason C. Neff
Patterns and drivers for wetland connections in the Prairie Pothole Region, United States
Ecosystem function in rivers, lakes and coastal waters depends on the functioning of upstream aquatic ecosystems, necessitating an improved understanding of watershed-scale interactions including variable surface-water flows between wetlands and streams. As surface water in the Prairie Pothole Region expands in wet years, surface-water connections occur between many depressional wetlands...
Authors
Melanie K. Vanderhoof, Jay R. Christensen, Laurie C. Alexander
Defining ecosystem assets for natural capital accounting
In natural capital accounting, ecosystems are assets that provide ecosystem services to people. Assets can be measured using both physical and monetary units. In the international System of Environmental-Economic Accounting, ecosystem assets are generally valued on the basis of the net present value of the expected flow of ecosystem services. In this paper we argue that several...
Authors
Lars Hein, Kenneth J. Bagstad, Bram Edens, Carl Obst, Rixt de Jong, Jan Peter Lesschen
Active faulting on the Wallula fault zone within the Olympic-Wallowa lineament, Washington State, USA
The Wallula fault zone is an integral feature of the Olympic-Wallowa lineament, an ∼500-km-long topographic lineament oblique to the Cascadia plate boundary, extending from Vancouver Island, British Columbia, to Walla Walla, Washington. The structure and past earthquake activity of the Wallula fault zone are important because of nearby infrastructure, and also because the fault zone...
Authors
Brian Sherrod, Richard J. Blakely, John P. Lasher, Andrew P. Lamb, Shannon A. Mahan, Franklin F. Foit, Elizabeth Barnett
Bedrock morphology and structure, upper Santa Cruz Basin, south-central Arizona, with transient electromagnetic survey data
The upper Santa Cruz Basin is an important groundwater basin containing the regional aquifer for the city of Nogales, Arizona. This report provides data and interpretations of data aimed at better understanding the bedrock morphology and structure of the upper Santa Cruz Basin study area which encompasses the Rio Rico and Nogales 1:24,000-scale U.S. Geological Survey quadrangles. Data...
Authors
Mark W. Bultman, William R. Page