Geomorphic processes responsible for decadal-scale arroyo changes, Rio Puerco, New Mexico
Allen C. Gellis, John G. Elliott, Milan Pavich
2017, Geological Society of America Bulletin (129) 1660-1680
The channel and arroyo of the Rio Puerco have continued to evolve since incision in the late 1800s. Resurveys of channel cross sections and aerial imagery over time indicate that between the 1970s and 1990s, the upstream reaches (type 1 morphology) of the Rio Puerco have continued to undergo construction...
Understanding and finding solutions to the problem of sedimentation in the National Wildlife Refuge System
Max Post van der Burg, Karen Jenni, Timothy L. Nieman, Josh D. Eash, Gregory A. Knutsen
2017, Journal of Fish and Wildlife Management (8) 648-660
The National Wildlife Refuge System (Refuge System) is a collection of public lands maintained by the U.S. Fish and Wildlife Service for migratory birds and other wildlife. Wetlands on individual National Wildlife Refuges (Refuges) may be at risk of increased sedimentation because of land use...
Volcanic unrest and hazard communication in Long Valley Volcanic Region, California
David P. Hill, Margaret T. Mangan, Stephen R. McNutt
2017, Book chapter, Advances in volcanology
The onset of volcanic unrest in Long Valley Caldera, California, in 1980 and the subsequent fluctuations in unrest levels through May 2016 illustrate: (1) the evolving relations between scientists monitoring the unrest and studying the underlying tectonic/magmatic processes and their implications for geologic hazards, and (2) the challenges in communicating...
Landform features and seasonal precipitation predict shallow groundwater influence on temperature in headwater streams
Zachary C. Johnson, Craig D. Snyder, Nathaniel P. Hitt
2017, Water Resources Research (53) 5788-5812
Headwater stream responses to climate change will depend in part on groundwater‐surface water exchanges. We used linear modeling techniques to partition likely effects of shallow groundwater seepage and air temperature on stream temperatures for 79 sites in nine focal watersheds using hourly air and water temperature measurements collected during summer...
Evaluation of genetic population structure of smallmouth bass in the Susquehanna River basin, Pennsylvania
Megan K. Schall, Meredith L. Bartron, Timothy Wertz, Jonathan M. Niles, Cassidy H. Shaw, Tyler Wagner
2017, North American Journal of Fisheries Management (37) 850-861
The Smallmouth Bass Micropterus dolomieu was introduced into the Susquehanna River basin, Pennsylvania, nearly 150 years ago. Since introduction, it has become an economically and ecologically important species that supports popular recreational fisheries. It is also one of the most abundant top predators in the system. Currently, there is no...
Seasonal movements and multiscale habitat selection of Whooping Crane (Grus americana) in natural and agricultural wetlands
Bradley A. Pickens, Sammy L. King, Phillip L. Vasseur, Sara E. Zimorski, Will Selman
2017, Waterbirds (40) 322-333
Eleven of 15 species of cranes (family: Gruidae) are considered vulnerable or endangered, and the increase of agriculture and aquaculture at the expense of natural wetlands and grasslands is a threat to Gruidae worldwide. A reintroduced population of Whooping Crane (Grus americana) was studied in coastal and agricultural wetlands of...
10Be dating of late Pleistocene megafloods and Cordilleran Ice Sheet retreat in the northwestern United States
Andrea M. Balbas, Aaron M. Barth, Peter U. Clark, Jorie Clark, Marc A. Caffee, Jim E. O'Connor, Victor R. Baker, Kevin Konrad, Bruce Bjornstad
2017, Geology (45) 583-586
During the late Pleistocene, multiple floods from drainage of glacial Lake Missoula further eroded a vast anastomosing network of bedrock channels, coulees, and cataracts, forming the Channeled Scabland of eastern Washington State (United States). However, the timing and exact pathways of these Missoula floods remain poorly constrained, thereby limiting our...
A proposal for amending administrative law to facilitate adaptive management
Robin K. Craig, J.B. Ruhl, Ellie Brown, Byron K. Williams
2017, Environmental Research Letters (12) 1-17
In this article we examine how federal agencies use adaptive management. In order for federal agencies to implement adaptive management more successfully, administrative law must adapt to adaptive management, and we propose changes in administrative law that will help to steer the current process out of a dead end. Adaptive...
Decadal declines in avian herbivore reproduction: density-dependent nutrition and phenological mismatch in the Arctic
Megan V. Ross, Ray T. Alisaukas, David C. Douglas, Dana K. Kellett
2017, Ecology (98) 1869-1883
A full understanding of population dynamics depends not only on estimation of mechanistic contributions of recruitment and survival, but also knowledge about the ecological processes that drive each of these vital rates. The process of recruitment in particular may be protracted over several years, and can depend on numerous ecological...
Gradients in Catostomid assemblages along a reservoir cascade
Leandro E. Miranda, Kevin R. Keretz, Chelsea R. Gilliland
2017, River Research and Applications (33) 983-990
Serial impoundment of major rivers leads to alterations of natural flow dynamics and disrupts longitudinal connectivity. Catostomid fishes (suckers, family Catostomidae) are typically found in riverine or backwater habitats yet are able to persist in impounded river systems. To the detriment of conservation, there is limited information about distribution of...
Glacierized headwater streams as aquifer recharge corridors, subarctic Alaska
Anna K. Lilledahl, Anne Gadeke, Shad O’Neel, T. A. Gatesman, T. A. Douglas
2017, Geophysical Research Letters (44) 6876-6885
Arctic river discharge has increased in recent decades although sources and mechanisms remain debated. Abundant literature documents permafrost thaw and mountain glacier shrinkage over the past decades. Here we link glacier runoff to aquifer recharge via a losing headwater stream in subarctic Interior Alaska. Field measurements in Jarvis Creek (634 km2),...
Challenges to oil spill assessment for seabirds in the deep ocean
J. Christopher Haney, Patrick G.R. Jodice, William Montevecchi, David C. Evers
2017, Archives of Environmental Contamination and Toxicology (73) 33-39
We synthesize impediments for evaluating effects to seabirds from open ocean hydrocarbon releases. Effects on seabirds from ship discharges, spills, and well blowouts often are poorly detected and monitored far from land. Regulatory regimes for ocean spills can result in monitoring efforts that are not entirely transparent. We illustrate how...
Lake nutrient stoichiometry is less predictable than nutrient concentrations at regional and sub-continental scales
Sarah M. Collins, Samantha K. Oliver, Jean-Francois Lapierre, Emily H. Stanley, John R. Jones, Tyler Wagner, Patricia A. Soranno
2017, Ecological Applications (27) 1529-1540
Production in many ecosystems is co-limited by multiple elements. While a known suite of drivers associated with nutrient sources, nutrient transport, and internal processing controls concentrations of phosphorus (P) and nitrogen (N) in lakes, much less is known about whether the drivers of single nutrient concentrations can also explain spatial...
Integration of vegetation community spatial data into a prescribed fire planning process at Shenandoah National Park, Virginia (USA)
John A. Young, Carolyn G. Mahan, Melissa Forder
2017, Natural Areas Journal (37) 394-405
Many eastern forest communities depend on fire for regeneration or are enhanced by fire as a restoration practice. However, the use of prescribed fire in the mesic forested environments and the densely populated regions of the eastern United States has been limited. The objective of our research was to develop...
Necropsy
Thierry M. Work, Brian A Stacy, Mark Flint
Charles A. Manire, Terry M. Norton, Brian A. Stacy, Craig A. Harms, Charles J. Innis, editor(s)
2017, Book chapter, Sea turtle health and rehabilitation
No abstract available....
Intra-reach headwater fish assemblage structure
James E. McKenna Jr.
2017, The Open Ecology Journal (10) 1-12
Large-scale conservation efforts can take advantage of modern large databases and regional modeling and assessment methods. However, these broad-scale efforts often assume uniform average habitat conditions and/or species assemblages within stream reaches....
Use of eddy-covariance methods to "calibrate" simple estimators of evapotranspiration
David M. Sumner, Jeffrey S. Geurink, Amy Swancar
2017, Conference Paper, 2017 ASABE Annual International Meeting
Direct measurement of actual evapotranspiration (ET) provides quantification of this large component of the hydrologic budget, but typically requires long periods of record and large instrumentation and labor costs. Simple surrogate methods of estimating ET, if “calibrated†to direct measurements of ET, provide a reliable means to quantify ET. Eddy-covariance...
Numerical simulations of sand production in interbedded hydrate-bearing sediments during depressurization
Shun Uchida, Jeen-Shang Lin, Evgeniy Myshakin, Yongkoo Seol, Timothy S. Collett, Ray Boswell
2017, Conference Paper, Proceeding of the 9th International Conference on Gas Hydrates
Geomechanical behavior of hydrate-bearing sediments during gas production is complex, involving changes in hydrate-dependent mechanical properties. When interbedded clay layers are present, the complexity is more pronounced because hydrate dissociation tends to occur preferentially in the sediments adjacent to the clay layers due to clay layers acting as a heat...
Diet composition of age-0 fishes in created habitats of the Lower Missouri River
Trevor A. Starks, James M. Long
2017, The American Midland Naturalist (178) 112-122
Channelization of the Missouri River has greatly reduced the availability of shallow water habitats used by many larval and juvenile fishes and contributed to imperilment of floodplain-dependent biota. Creation of small side channels, or chutes, is being used to restore shallow water habitat and reverse negative environmental effects associated with...
The increasingly complex challenge of gas hydrate reservoir simulation
Ray Boswell, Timothy S. Collett, Evshakin Myshakin, Taiwo Ajayi, Yongkoo Seol
2017, Conference Paper, Proceeding of the 9th International Conference on Gas Hydrates
No abstract available....
Mortality investigation
Brian Stacy, Allen M. Foley, Thierry M. Work, Terry M. Norton
Charles A. Manire, Terry M. Norton, Brian A Stacy, Craig A. Harms, Charles J. Innis, editor(s)
2017, Book chapter, Sea turtle health and rehabilitation
No abstract available....
Numerical studies of depressurization-induced gas production from an interbedded marine turbidite gas hydrate reservoir model
Evgeniy Myshakin, Jeen-Shang Lin, Shun Uchida, Yongkoo Seol, Timothy S. Collett, Ray Boswell
2017, Conference Paper, Proceeding of the 9th International Conference on Gas Hydrates
The numerical simulation of thin hydrate-bearing sand layers interbedded with mud layers is investigated. In this model, the lowest hydrate layer occurs at the base of gas hydrate stability and overlies a thinly-interbedded saline aquifer. The predicted gas rates reach 6.25 MMscf/day (1.77 x 105 m3 /day) after 90 days...
Reproductive ecology, spawning behavior, and juvenile distribution of Mountain Whitefish in the Madison River, Montana
Jan K. Boyer, Christopher S. Guy, Molly A. H. Webb, Travis B. Horton, Thomas E. McMahon
2017, Transactions of the American Fisheries Society (146) 939-954
Mountain Whitefish Prosopium williamsoni were historically common throughout much of the U.S. Intermountain West. However, within the last decade Mountain Whitefish have exhibited population-level declines in some rivers. In the Madison River, Montana, anecdotal evidence indicates Mountain Whitefish abundance has declined and the population is skewed toward larger individuals, which is typically...
Species’ traits help predict small mammal responses to habitat homogenization by an invasive grass
Joseph P. Ceradini, Anna D. Chalfoun
2017, Ecological Applications (27) 1451-1465
Invasive plants can negatively affect native species, however, the strength, direction, and shape of responses may vary depending on the type of habitat alteration and the natural history of native species. To prioritize conservation of vulnerable species, it is therefore critical to effectively predict species’ responses to invasive plants, which...
Comparison of American Fisheries Society (AFS) standard fish sampling techniques and environmental DNA for characterizing fish communities in a large reservoir
Christina R. Perez, Scott A. Bonar, Jon J. Amberg, Bridget Ladell, Christopher B. Rees, William T. Stewart, Curtis J. Gill, Chris Cantrell, Anthony Robinson
2017, North American Journal of Fisheries Management (37) 1010-1027
Recently, methods involving examination of environmental DNA (eDNA) have shown promise for characterizing fish species presence and distribution in waterbodies. We evaluated the use of eDNA for standard fish monitoring surveys in a large reservoir. Specifically, we compared the presence, relative abundance, biomass, and relative percent composition of Largemouth Bass Micropterus...
