Mangrove species' responses to winter air temperature extremes in China
Luzhen Chen, Wenqing Wang, Qingshun Q. Li, Yihui Zhang, Shengchang Yang, Michael J. Osland, Jinliang Huang, Congjiao Peng
2017, Ecosphere (8)
The global distribution and diversity of mangrove forests is greatly influenced by the frequency and intensity of winter air temperature extremes. However, our understanding of how different mangrove species respond to winter temperature extremes has been lacking because extreme freezing and chilling events are, by definition, relatively uncommon and also...
Finite‐fault Bayesian inversion of teleseismic body waves
Brandon Clayton, Stephen H. Hartzell, Morgan P. Moschetti, Sarah E. Minson
2017, Bulletin of the Seismological Society of America (107) 1526-1544
Inverting geophysical data has provided fundamental information about the behavior of earthquake rupture. However, inferring kinematic source model parameters for finite‐fault ruptures is an intrinsically underdetermined problem (the problem of nonuniqueness), because we are restricted to finite noisy observations. Although many studies use least‐squares techniques to make the finite‐fault problem...
Effects of temperature, total dissolved solids, and total suspended solids on survival and development rate of larval Arkansas River Shiner
Julia S. Mueller, Timothy B. Grabowski, Shannon K. Brewer, Thomas A. Worthington
2017, Journal of Fish and Wildlife Management (8) 79-88
Decreases in the abundance and diversity of stream fishes in the North American Great Plains have been attributed to habitat fragmentation, altered hydrological and temperature regimes, and elevated levels of total dissolved solids and total suspended solids. Pelagic-broadcast spawning cyprinids, such as the Arkansas River Shiner Notropis girardi, may be particularly vulnerable...
Water-level and recoverable water in storage changes, High Plains aquifer, predevelopment to 2015 and 2013–15
Virginia L. McGuire
2017, Scientific Investigations Report 2017-5040
The High Plains aquifer underlies 111.8 million acres (about 175,000 square miles) in parts of eight States—Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming. Water-level declines began in parts of the High Plains aquifer soon after the beginning of substantial irrigation with groundwater in the aquifer area...
Assessment of frequency and duration of point counts when surveying for golden eagle presence
Ben R. Skipper, Clint W. Boal, Jo-Szu Tsai, Mark R. Fuller
2017, Wildlife Society Bulletin (41) 212-223
We assessed the utility of the recommended golden eagle (Aquila chrysaetos) survey methodology in the U.S. Fish and Wildlife Service 2013 Eagle Conservation Plan Guidance. We conducted 800-m radius, 1-hr point-count surveys broken into 20-min segments, during 2 sampling periods in 3 areas within the Intermountain West of the United...
Benchmarking computational fluid dynamics models of lava flow simulation for hazard assessment, forecasting, and risk management
Hannah R. Dietterich, Einat Lev, Jiangzhi Chen, Jacob A. Richardson, Katharine V. Cashman
2017, Journal of Applied Volcanology (6)
Numerical simulations of lava flow emplacement are valuable for assessing lava flow hazards, forecasting active flows, designing flow mitigation measures, interpreting past eruptions, and understanding the controls on lava flow behavior. Existing lava flow models vary in simplifying assumptions, physics, dimensionality, and the degree to which they have been validated...
Nutrient and sediment concentrations and loads in the Steele Bayou Basin, northwestern Mississippi, 2010–14
Matthew B. Hicks, Jennifer C. Murphy, Shane J. Stocks
2017, Scientific Investigations Report 2017-5035
The U.S. Geological Survey, in cooperation with the U.S. Army Corps of Engineers-Vicksburg District, monitored streamflow, water quality, and sediment at two stations on the Steele Bayou in northwestern Mississippi from October 2010 through September 2014 to characterize nutrient and sediment concentrations and loads in areas where substantial implementation of...
Influence of genetic background, salinity, and inoculum size on growth of the ichthyotoxic golden alga (Prymnesium parvum)
Rakib H. Rashel, Reynaldo Patino
2017, Harmful Algae (66) 97-104
Salinity (5–30) effects on golden alga growth were determined at a standard laboratory temperature (22 °C) and one associated with natural blooms (13 °C). Inoculum-size effects were determined over a wide size range (100–100,000 cells ml−1). A strain widely distributed in the USA, UTEX-2797 was the primary study subject but another of limited distribution,...
Sources and ages of fine-grained sediment to streams using fallout radionuclides in the Midwestern United States
Allen C. Gellis, Christopher C. Fuller, Peter C. Van Metre
2017, Journal of Environmental Management (194) 73-85
Fallout radionuclides, 7Be and 210Pbex, sampled in bed sediment for 99 watersheds in the Midwestern region of the United States and in 15 samples of suspended sediment from 3 of these watersheds were used to partition upland from channel sources and to estimate the age or the time since the surface-derived portion...
Reexamining ultrafiltration and solute transport in groundwater
Christopher E. Neuzil, Mark Person
2017, Water Resources Research (53) 4922-4941
Geologic ultrafiltration—slowing of solutes with respect to flowing groundwater—poses a conundrum: it is consistently observed experimentally in clay-rich lithologies, but has been difficult to identify in subsurface data. Resolving this could be important for clarifying clay and shale transport properties at large scales as well as interpreting solute and isotope...
A decade of boreal rich fen greenhouse gas fluxes in response to natural and experimental water table variability
David Olefeldt, Eugénie S. Euskirchen, Jennifer W. Harden, Evan S. Kane, A. David McGuire, Mark P. Waldrop, Merritt R. Turetsky
2017, Global Change Biology (23) 2428-2440
Rich fens are common boreal ecosystems with distinct hydrology, biogeochemistry and ecology that influence their carbon (C) balance. We present growing season soil chamber methane emission (FCH4), ecosystem respiration (ER), net ecosystem exchange (NEE) and gross primary production (GPP) fluxes from a 9-years water table manipulation experiment in an Alaskan...
Behavioral responses of Pacific lamprey to alarm cues
Laurie L. Porter, Michael C. Hayes, Aaron D. Jackson, Brian J. Burke, Mary L. Moser, R. Steven Wagner
2017, Journal of Fish and Wildlife Management (8) 101-113
Pacific lamprey (Entosphenus tridentatus), an anadromous ectoparasite, faces several challenges during adult migration to spawning grounds. Developing methods to address these challenges is critical to the success of ongoing conservation efforts. The challenges are diverse, and include anthropogenic alterations to the ecosystem resulting in loss of habitat, impassable barriers such...
Erosion characteristics and horizontal variability for small erosion depths in the Sacramento-San Joaquin River Delta, California, USA
David H. Schoellhamer, Andrew J. Manning, Paul A. Work
2017, Ocean Dynamics (67) 799-811
Erodibility of cohesive sediment in the Sacramento-San Joaquin River Delta (Delta) was investigated with an erosion microcosm. Erosion depths in the Delta and in the microcosm were estimated to be about one floc diameter over a range of shear stresses and times comparable to half of a typical tidal cycle....
Temporal genetic population structure and interannual variation in migration behavior of Pacific Lamprey Entosphenus tridentatus
Benjamin J. Clemens, Lance A. Wyss, Rebecca McCoun, Ian Courter, Lawrence Schwabe, Christopher Peery, Carl B. Schreck, Erin K. Spice, Margaret F. Docker
2017, Hydrobiologia (794) 223-240
Studies using neutral loci suggest that Pacific lamprey, Entosphenus tridentatus, lack strong spatial genetic population structure. However, it is unknown whether temporal genetic population structure exists. We tested whether adult Pacific lamprey: (1) show temporal genetic population structure; and (2) migrate different distances between years. We non-lethally sampled lamprey...
Ecological change drives a decline in mercury concentrations in southern Beaufort Sea polar bears
Melissa A. McKinney, Todd C. Atwood, Sara Pedro, Elizabeth L. Peacock
2017, Environmental Science & Technology (51) 7814-7822
We evaluated total mercury (THg) concentrations and trends in polar bears from the southern Beaufort Sea subpopulation from 2004 to 2011. Hair THg concentrations ranged widely among individuals from 0.6 to 13.3 μg g–1 dry weight (mean: 3.5 ± 0.2 μg g–1). Concentrations differed among sex and age classes: solitary adult...
Habitat models to predict wetland bird occupancy influenced by scale, anthropogenic disturbance, and imperfect detection
Wesley J. Glisson, Courtney J. Conway, Christopher P. Nadeau, Kathi L. Borgmann
2017, Ecosphere (8) 1-20
Understanding species–habitat relationships for endangered species is critical for their conservation. However, many studies have limited value for conservation because they fail to account for habitat associations at multiple spatial scales, anthropogenic variables, and imperfect detection. We addressed these three limitations by developing models for an endangered wetland bird, Yuma...
Length limits fail to restructure a Largemouth Bass population: A 28‐year case history
Leandro E. Miranda, M.E. Colvin, A. C. Shamaskin, L. A. Bull, T. Holman, R. Jones
2017, North American Journal of Fisheries Management (37) 624-632
Length limits have been implemented by fisheries management agencies to achieve population density, size structure, and angler satisfaction objectives. By redirecting harvest towards or away from particular length‐ or age‐groups, length limits rely on harvest by anglers to maintain a population at or near a desired state. The fish population...
A new mechanistic approach for the further development of a population with established size bimodality
Lisa Heerman, Donald L. DeAngelis, Jost Borcherding
2017, PLoS ONE (12) 1-18
Usually, the origin of a within-cohort bimodal size distribution is assumed to be caused by initial size differences or by one discrete period of accelerated growth for one part of the population. The aim of this study was to determine if more continuous pathways exist allowing shifts from the small...
Natural infections with pigeon paramyxovirus serotype 1: Pathologic changes in Eurasian collared-doves (Streptopelia decaocto) and rock pigeons (Columba livia) in the United States
Marcos Isidoro Ayza, C.L. Afonso, J.B. Stanton, Susan Knowles, S. Ip, C. LeAnn White, Heather Fenton, M.G. Ruder, A. C. Dolinski, Julia S. Lankton
2017, Veterinary Pathology (54) 695-703
Pigeon paramyxovirus serotype 1 (PPMV-1) is a globally distributed, virulent member of the avian paramyxovirus serotype 1 serogroup that causes mortality in columbiformes and poultry. Following introduction into the United States in the mid-1980s, PPMV-1 rapidly spread causing numerous mortality events in Eurasian collared-doves (Streptopelia decaocto) (ECDOs) and rock pigeons...
Hydrogeologic framework and selected components of the groundwater budget for the upper Umatilla River Basin, Oregon
Nora B. Herrera, Kate Ely, Smita Mehta, Adam J. Stonewall, John C. Risley, Stephen R. Hinkle, Terrence D. Conlon
2017, Scientific Investigations Report 2017-5020
Executive SummaryThis report presents a summary of the hydrogeology of the upper Umatilla River Basin, Oregon, based on characterization of the hydrogeologic framework, horizontal and vertical directions of groundwater flow, trends in groundwater levels, and components of the groundwater budget. The conceptual model of the groundwater flow system integrates available...
Water temperature effects from simulated changes to dam operations and structures in the Middle and South Santiam Rivers, Oregon
Norman L. Buccola
2017, Open-File Report 2017-1063
Green Peter and Foster Dams on the Middle and South Santiam Rivers, Oregon, have altered the annual downstream water temperature profile (cycle). Operation of the dams has resulted in cooler summer releases and warmer autumn releases relative to pre-dam conditions, and that alteration can hinder recovery of various life...
Addressing wild turkey population declines using structured decision making
Kelly F. Robinson, Angela K. Fuller, Michael V. Schiavone, Bryan L. Swift, Duane R. Diefenbach, William F. Siemer, Daniel J. Decker
2017, Journal of Wildlife Management (81) 393-405
We present a case study from New York, USA, of the use of structured decision making (SDM) to identify fall turkey harvest regulations that best meet stakeholder objectives, in light of recent apparent declines in abundance of wild turkeys in the northeastern United States. We used the SDM framework to...
Seasonal and diel environmental conditions predict western pond turtle (Emys marmorata) behavior at a perennial and an ephemeral stream in Sequoia National Park, California
Gabrielle Ruso, Erik Meyer, Adrian J. Das
2017, Chelonian Conservation and Biology (16) 20-28
Managers making decisions may benefit from a well-informed understanding of a species' population size and trends. Given the cryptic nature and habitat characteristics of the western pond turtle (Emys marmorata), however, imperfect detection may be high and population estimates are frequently varied and unreliable. As a case study to investigate...
Conservation, biodiversity and infectious disease: scientific evidence and policy implications
Hillary S. Young, Chelsea L. Wood, A. Marm Kilpatrick, Kevin D. Lafferty, Charles L. Nunn, Jeffrey R. Vincent
2017, Philosophical Transactions of the Royal Society B: Biological Sciences (372) 1-4
Habitat destruction and infectious disease are dual threats to nature and people. The potential to simultaneously advance conservation and human health has attracted considerable scientific and popular interest; in particular, many authors have justified conservation action by pointing out potential public health benefits . One major focus of this...
Predation of freshwater fish in environments with elevated carbon dioxide
Stephen R. Midway, Caleb T. Hasler, Tyler Wagner, C. D. Suski
2017, Marine and Freshwater Research (68) 1585-1592
Carbon dioxide (CO2) in fresh-water environments is poorly understood, yet in marine environments CO2 can affect fish behaviour, including predator–prey relationships. To examine changes in predator success in elevated CO2, we experimented with predatory Micropterus salmoides and Pimephales promelas prey. We used a two-factor fully crossed experimental design; one factor...
