Safety in numbers: Cost-effective endangered species management for viable populations
Pierce Donovan, Lucas S. Bair, Charles B. Yackulic, Michael R. Springborn
2019, Land Economics (95) 435-453
We develop a bioeconomic model to identify the cost-effective control of an invasive species (rain-bow trout) to achieve a population viability goal for an endangered species (humpback chub) in the Grand Canyon of the U.S. southwest. The population viability optimization problem is no-toriously difficult to solve due to a probabilistic...
Predictive analysis using chemical-gene interaction networks consistent with observed endocrine activity and mutagenicity of U.S. streams
Jason P. Berninger, David M. DeMarini, Sarah H. Warren, Jane Ellen Simmons, Vickie S. Wilson, Justin M. Conley, Mikayla D. Armstrong, Dana W. Kolpin, Kathryn Kuivila, Timothy J. Reilly, Kristin M. Romanok, Daniel L. Villeneuve, Paul M. Bradley, Luke R. Iwanowicz
2019, Environmental Science & Technology (53) 8611-8620
In a recent U.S. Geological Survey/U.S. Environmental Protection Agency study assessing >700 organic compounds in 38 streams, in vitro assays indicated generally low estrogen, androgen, and glucocorticoid receptor activities, but identified 13 surface waters with 17β estradiol equivalent (E2Eq) activities greater than the 1 ng/L level of concern for feminization...
Landscape-scale greater prairie-chicken–habitat relations and the Conservation Reserve Program
Kalysta Adkins, Charlotte L. Roy, David E. Andersen, Robert G. Wright
2019, Journal of Wildlife Management (83) 1415-1426
Both the abundance of greater prairie-chickens (Tympanuchus cupido pinnatus) and the area of grassland enrolled in the Conservation Reserve Program (CRP) in northwestern Minnesota, USA, have recently declined. Although wildlife conservation is a stated objective of the CRP, the impact of the CRP on greater prairie-chicken populations has not been...
Timber harvest alters mercury bioaccumulation and food web structure in headwater streams
James Willacker, Collin A. Eagles-Smith, Brandon M Kowalski, Robert J Danehy, Allyson K. Jackson, Evan M. Adams, David C. Evers, Chris S. Eckley, Michael T. Tate, David P. Krabbenhoft
2019, Environmental Pollution (253) 636-645
Timber harvest has many effects on aquatic ecosystems, including changes in hydrological, biogeochemical, and ecological processes that can influence mercury (Hg) cycling. Although timber harvest’s influence on aqueous Hg transformation and transport are well studied, the effects on Hg bioaccumulation are not. We evaluated Hg bioaccumulation, biomagnification, and food web...
Replicated landscape genomics identifies evidence of local adaptation to urbanization in wood frogs
Cyndy Loftin, Jared J. Homola, Kristina M. Cammen, Caren C. Helbing, Inanc Birol, Thomas F. Schultz, Michael T. Kinnison
2019, Journal of Heredity (110) 707-719
Native species that persist in urban environments may benefit from local adaptation to novel selection factors. We used double-digest restriction-side associated DNA (RAD) sequencing to evaluate shifts in genome-wide genetic diversity and investigate the presence of parallel evolution associated with urban-specific selection factors in wood frogs (Lithobates sylvaticus). Our...
The influence of foreland structures on hinterland cooling: evaluating the drivers of exhumation in the eastern Bhutan Himalaya
Nadine McQuarrie, Paul R. Eizenhofer, Sean P. Long, Tobgay Tobgay, Todd A. Ehlers, Ann Blythe, Leah E. Morgan, Michelle Gilmore, Gregory M. Dering
2019, Tectonics (38) 3282-3310
Understanding, and ideally quantifying, the relative roles of climatic and tectonic processes during orogenic exhumation is critical to resolving the dynamics of mountain building. However, vastly differing opinions regarding proposed drivers often complicate how thermochronometric ages are interpreted, particularly from the hinterland portions of thrust belts. Here we integrate three...
Lidar-based approaches for estimating solar insolation in heavily forested streams
Jeffrey J Richardson, Christian E. Torgersen, L Monika Moskal
2019, Hydrology and Earth System Sciences (23) 2813-2822
Methods to quantify solar insolation in riparian landscapes are needed due to the importance of stream temperature to aquatic biota. We have tested three lidar predictors using two approaches developed for other applications of estimating solar insolation from airborne lidar using field data...
Are polar bear habitat resource selection functions developed from 1985-1996 data still useful?
George M. Durner, David C. Douglas, Todd C. Atwood
2019, Ecology and Evolution (9) 8625-8638
1. Greenhouse gas-induced warming in the Arctic has caused declines in sea ice extent and changed its composition, raising concerns by all circumpolar nations for polar bear conservation. 2. Negative impacts have been observed in three well-studied polar bear subpopulations. Most subpopulations, however, receive little or no direct monitoring, hence, resource selection...
Long-term (1986–2015) crop water use characterization over the Upper Rio Grande Basin of United States and Mexico using Landsat-based evapotranspiration
Gabriel Senay, Matthew Schauer, Naga Manohar Velpuri, Ramesh Singh, Stefanie Kagone, MacKenzie Friedrichs, Marcy Litvak, Kyle R. Douglas-Mankin
2019, Remote Sensing (11)
The evaluation of historical water use in the Upper Rio Grande Basin (URGB), United States and Mexico, using Landsat-derived actual evapotranspiration (ETa) from 1986 to 2015 is presented here as the first study of its kind to apply satellite observations to quantify long-term, basin-wide crop consumptive use in a large...
Corrigendum to “Intercomparison of surface energy fluxes, soil moisture, and evapotranspiration from eddy covariance, large-aperture scintillometer, and modeling across three ecosystems in a semiarid climate” [Agric. For. Meteorol. 248 (2018) 22–47]
Prasanth Valayamkunnath, Venkataramana Sridhar, Wenguang Zhao, Richard G Allen, Matthew J. Germino
2019, Agricultural and Forest Meteorology (278)
No abstract available....
Locating shallow seismic sources with waves scattered by surface topography: Validation of the method at the Nevada Test Site
Nian Wang, Yang Shen, Xueyang Bao, Ashton F. Flinders
2019, Journal of Geophysical Research B: Solid Earth (124) 7040-7051
Accurate and robust source location is fundamental in seismology. Previously, we proposed a new full waveform location method using waves scattered by topography near the source, and we demonstrated its potential in obtaining accurate source location using synthetic data. In the work presented here, we validate this method with observed...
Inorganic nitrogen wet deposition gradients in the Denver-Boulder metropolitan area and Colorado Front Range – Preliminary implications for Rocky Mountain National Park and interpolated deposition maps
Gregory A. Wetherbee, Katherine Benedict, Sheila F. Murphy, Emily Elliott
2019, Science of the Total Environment (691) 1027-1042
For the first time in the 40-year history of the National Atmospheric Deposition Program / National Trends Network (NADP/NTN), a unique urban-to-rural transect of wet deposition monitoring stations were operated as part of the NTN in 2017 to quantify reactive inorganic nitrogen wet deposition for adjacent urban and rural, montane...
Depth determination of the 2010 El Mayor‐Cucapah earthquake sequence (M ≥ 4.0)
C. Yu, E. Hauksson, Z. Zhan, Elizabeth S. Cochran, D. Helmberger
2019, Journal of Geophysical Research B: Solid Earth (124) 6801-6814
The 2010 MW 7.2 El Mayor‐Cucapah earthquake ruptured a zone of ~120 km in length in northern Baja California. The geographic distribution of this earthquake sequence was well constrained by waveform relocation. The depth distribution, however, was poorly determined as it is near the edge of, or outside, the Southern California Seismic...
Perspective: Developing flow policies to balance the water needs of humans and wetlands requires a landscape scale approach inclusive of future scenarios and multiple timescales
Brent Murry, Jared Bowden, Benjamin Branoff, Miguel Garcia-Bermudez, Beth A. Middleton, Jorge Ortiz-Zayas, Carla Restrepo, Adam J. Terando
2019, Wetlands 1-13
Maintenance of the natural flow regime is essential for continued wetland integrity; however, the flow regime is greatly influenced by both natural and anthropogenic forces. Wetlands may be particularly susceptible to altered flow regimes as they are directly impacted by water flows at a variety of time scales. In Puerto...
Late Miocene to Pleistocene source to sink record of exhumation and sediment routing in the Gulf of Alaska from detrital zircon fission-track and U-Pb double dating
Nathaniel Bootes, Eva Enkelmann, Richard O. Lease
2019, Tectonics (38) 2703-2726
We investigate the late Miocene‐Pleistocene offshore sedimentary record of the Yakutat microplate to evaluate the spatial and temporal variations in rock exhumation and sediment routing patterns at the heavily glaciated and actively converging plate boundary in southeast Alaska. We present 1,456 new fission track ages and 1,372...
Lithosphere and shallow asthenosphere rheology from observations of post-earthquake relaxation
Frederick Pollitz
2019, Physics of Earth and Planetary Interiors (293)
In tectonically active regions, post-earthquake motions are generally shaped by a combination of continued fault slippage (afterslip) on a timescale of days to months and viscoelastic relaxation of the lower crust and upper mantle on a timescale of days to years. Transient crustal motions have been observed following numerous magnitude >~7 earthquakes in various tectonic...
Modeling transient soil moisture limitations on microbial carbon respiration: A cost-performance comparison
Yuchen Liu, Corey R. Lawrence, Mathew Winnick, Hsiao-Tieh Hsu, Katherine Maher, Jennifer Druhan
2019, Biogeosciences (124) 2222-2247
Soil microorganisms are known to survive periods of aridity and to recover rapidly after wetting events, with the ability to transition between a dormant state in dry conditions and an active state in wet conditions. Though this dynamic behavior has been previously incorporated into soil carbon respiration modeling frameworks, a...
Sharp savanna-forest transitions in the Midwest followed environmental gradients but are absent from the modern landscape
Caitlin M. Broderick, Kelly A Heilman, Tamatha Patterson, Jody Peters, Jason S. McLachlan
2019, The American Midland Naturalist (180) 1-17
Historically, closed eastern forests transitioned into open savannas and prairies in the US Midwest, but this transition is poorly understood. To investigate the eastern boundary of the prairie-forest ecotone, we conducted a case study of historic and modern vegetation patterns of the Yellow River watershed in northwest Indiana. Historic vegetation...
The relationship of channel planform and point bar architecture on a reach of the Wabash River near Grayville, Illinois
Taylor Rowley, Kory Konsoer, Mick Ursic, Eddy J. Langendoen
2019, Conference Paper, Proceedings of SEDHYD 2019
The erosional and depositional characteristics of meandering rivers lead to the formation and maintenance of point bars along the inner banks of meander bends. Point bars are composed of sediment layers in patterns resulting from the rate and style of channel migration, hydrodynamics, and sediment transport and deposition within the...
Channel modification and evolution alter hydraulic connectivity in the Atchafalaya River basin increasing vulnerability to sea-level rise
Daniel Kroes, Richard H. Day, Charles R. Demas, Yvonne C. Allen, Steve Roberts
2019, Conference Paper, Proceedings of SEDHYD 2019
Channel dredging and erosion in the Atchafalaya River basin have resulted in changes to the hydraulic connectivity of this floodplain swamp that have not been previously quantified. In this study, analyses were conducted to determine hydraulic and geomorphic factors that have changed since channel closure in 1962. Results indicated changes...
Sediment monitoring to support modeling a reservoir sediment flush on a sand-bed river in Northern Nebraska
Nathaniel J. Schaepe, Paul M Boyd
2019, Conference Paper, Proceedings of SEDHYD 2019
The U.S. Geological Survey (USGS) in cooperation with the U.S. Army Corps of Engineers (USACE), monitored a sediment flush event from Spencer Dam located on the Niobrara River near Spencer, Nebraska, during the fall of 2014. Data collected during the flush was used to validate a one-dimensional sediment transport model...
Field-scale sediment feed flume: Upper Santa Ana River, California
Scott Wright, J. Toby Minear
2019, Conference Paper, Proceedings of SEDHYD 2019
Along the San Bernardino Valley, the Santa Ana River decreases in slope, increases in width, and deposits particles from boulders to sand as it loses transport capacity. Episodic rainfalls feed very large winter floods, but dry summer and fall periods lead to extensive dry alluvial reaches due to surface water...
Near-field remote sensing of Alaskan Rivers
Paul J. Kinzel, Carl J. Legleiter, Jonathan M. Nelson, Jeff Conaway, Adam LeWinter, Peter Gadomski, Dominic Filiano
2019, Conference Paper
The U.S. Geological Survey (USGS) Geomorphology and Sediment Transport Laboratory (GSTL), in collaboration with the U.S. Army Corps of Engineers Cold Regions Research and Engineering Laboratory (CRREL), acquired remotely sensed data from several Alaskan rivers in 2017 and 2018 with the goal of developing a methodology for measuring streamflow from...
Integrated hydrologic modeling of the Salinas River, California, for sustainable water management
Joseph A. Hevesi, Wesley R. Henson, Randall T. Hanson, Scott E. Boyce
2019, Conference Paper, Proceedings of SEDHYD 2019
The Salinas River is the largest river in California’s Central Coast region. Groundwater resources of the Salinas River basin are used to meet water supply needs, including crop irrigation and municipal water supply. Two large multipurpose reservoirs also supply irrigation and municipal water uses. Historical imbalances between supply and demand...
Measurement of sounds emitted by certain high-resolution geophysical survey systems
Steven E Crocker, Frank D Fratantonio, Patrick E. Hart, David S. Foster, Thomas F. O’Brien, Stanley Labak
2019, IEEE Journal of Oceanic Engineering (44) 796-813
Scientific questions regarding the impact of anthropomorphic noise in the marine environment have resulted in an increasing number of regulatory requirements and precautionary mitigation strategies to reduce the risks associated with high-resolution marine geophysical surveys performed in waters subjected to government jurisdiction. An example of regulatory frameworks includes the Marine...
