Body size and condition influence migration timing of juvenile Arctic grayling
Kurt C. Heim, Mark S. Wipfli, Matthew S. Whitman, Andrew C. Seitz
2016, Ecology of Freshwater Fish (25) 156-166
Freshwater fishes utilising seasonally available habitats within annual migratory circuits time movements out of such habitats with changing hydrology, although individual attributes of fish may also mediate the behavioural response to environmental conditions. We tagged juvenile Arctic grayling in a seasonally flowing stream on the Arctic Coastal Plain in Alaska...
Mercury remediation in wetland sediment using zero-valent iron and granular activated carbon
Ariel S. Lewis, Thomas G. Huntington, Mark C. Marvin-DiPasquale, Aria Amirbahman
2016, Environmental Pollution (212) 366-373
Wetlands are hotspots for production of toxic methylmercury (MeHg) that can bioaccumulate in the food web. The objective of this study was to determine whether the application of zero-valent iron (ZVI) or granular activated carbon (GAC) to wetland sediment could reduce MeHg production and bioavailability to benthic organisms. Field mesocosms...
Wetland tree transpiration modified by river-floodplain connectivity
Scott T. Allen, Ken W. Krauss, J. Wesley Cochran, Sammy L. King, Richard F. Keim
2016, Journal of Geophysical Research G: Biogeosciences (121) 753-766
Hydrologic connectivity provisions water and nutrient subsidies to floodplain wetlands and may be particularly important in floodplains with seasonal water deficits through its effects on soil moisture. In this study, we measured sapflow in 26 trees of two dominant floodplain forest species (Celtis laevigata and Quercus lyrata) at two hydrologically distinct sites...
Seasonal flows of international British Columbia-Alaska rivers: The nonlinear influence of ocean-atmosphere circulation patterns
Sean W. Fleming, Eran Hood, Helen Dalhke, Shad O’Neel
2016, Advances in Water Resources (87) 42-55
The northern portion of the Pacific coastal temperate rainforest (PCTR) is one of the least anthropogenically modified regions on earth and remains in many respects a frontier area to science. Rivers crossing the northern PCTR, which is also an international boundary region between British Columbia, Canada and Alaska, USA, deliver...
Wide-area estimates of evapotranspiration by red gum (Eucalyptus camaldulensis) and associated vegetation in the Murray-Darling River Basin, Australia
Pamela L. Nagler, Tanya M. Doody, Edward P. Glenn, Christopher J. Jarchow, Armando Barreto-Munoz, Kamel Didan
2016, Hydrological Processes (30) 1376-1387
Floodplain red gum forests (Eucalyptus camaldulensis plus associated grasses, reeds and sedges) are sites of high biodiversity in otherwise arid regions of southeastern Australia. They depend on periodic floods from rivers, but dams and diversions have reduced flood frequencies and volumes, leading to deterioration of trees and associated biota. There is...
An empirical assessment of which inland floods can be managed
Beatriz Mogollon, Emmanuel A. Frimpong, Andrew B. Hoegh, Paul L. Angermeier
2016, Journal of Environmental Management (167) 38-48
Riverine flooding is a significant global issue. Although it is well documented that the influence of landscape structure on floods decreases as flood size increases, studies that define a threshold flood-return period, above which landscape features such as topography, land cover and impoundments can curtail floods, are lacking. Further, the...
An index of floodplain surface complexity
Murray W. Scown, Martin C. Thoms, Nathan R. De Jager
2016, Hydrology and Earth System Sciences (20) 431-441
Floodplain surface topography is an important component of floodplain ecosystems. It is the primary physical template upon which ecosystem processes are acted out, and complexity in this template can contribute to the high biodiversity and productivity of floodplain ecosystems. There has been a limited appreciation of floodplain surface complexity because...
Spatial and temporal variation in microcystins occurrence in wadeable streams in the southeastern USA
Keith A. Loftin, Jimmy M. Clark, Celeste A. Journey, Dana W. Kolpin, Peter C. Van Metre, Paul M. Bradley
2016, Environmental Toxicology and Chemistry (35) 2281-2287
Despite historical observations of potential microcystin-producing cyanobacteria (including Leptolyngbya,Phormidium, Pseudoanabaena, and Anabaena species) in 74% of headwater streams in Alabama, Georgia, South Carolina, and North Carolina (USA) from 1993 to 2011, fluvial cyanotoxin occurrence has not been systematically assessed in the southeastern United States. To begin to address this data...
Invertebrates in managed waterfowl marshes
Joshua D. Stafford, Adam K. Janke, Elisabeth B. Webb, Steven R. Chipps
2016, Book chapter, Invertebrates in freshwater wetlands: an international perspective on their ecology
Invertebrates are an important food for breeding, migrating, and wintering waterfowl. Sparse study has been devoted to understanding the influence of waterfowl and wetland management on production of invertebrates for waterfowl foods; however, manipulation of hydrology and soils may change or enhance production. Fish can compete with waterfowl for invertebrate...
Water balance monitoring for two bioretention gardens in Omaha, Nebraska, 2011–14
Kellan R. Strauch, David L. Rus, Kent E. Holm
2016, Scientific Investigations Report 2015-5188
Bioretention gardens are used to help mitigate stormwater runoff in urban settings in an attempt to restore the hydrologic response of the developed land to a natural predevelopment response in which more water is infiltrated rather than routed directly to urban drainage networks. To better understand the performance of bioretention...
Dietary uptake of Cu sorbed to hydrous iron oxide is linked to cellular toxicity and feeding inhibition in a benthic grazer
Daniel J. Cain, Marie Noele Croteau, Christopher C. Fuller, Amy H. Ringwood
2016, Environmental Science & Technology (50) 1552-1560
Whereas feeding inhibition caused by exposure to contaminants has been extensively documented, the underlying mechanism(s) are less well understood. For this study, the behavior of several key feeding processes, including ingestion rate and assimilation efficiency, that affect the dietary uptake of Cu were evaluated in the benthic grazer Lymnaea stagnalis following 4–5...
PHT3D-UZF: A reactive transport model for variably-saturated porous media
Ming Zhi Wu, Vincent E. A. Post, S. Ursula Salmon, Eric D. Morway, H. Prommer
2016, Ground Water (54) 23-34
A modified version of the MODFLOW/MT3DMS-based reactive transport model PHT3D was developed to extend current reactive transport capabilities to the variably-saturated component of the subsurface system and incorporate diffusive reactive transport of gaseous species. Referred to as PHT3D-UZF, this code incorporates flux terms calculated by MODFLOW's unsaturated-zone flow (UZF1) package....
Endangered species management and ecosystem restoration: Finding the common ground
Michael L. Casazza, Cory T. Overton, Thuy-Vy D. Bui, Joshua M. Hull, Joy D. Albertson, Valary K. Bloom, Steven Bobzien, Jennifer McBroom, Marilyn Latta, Peggy Olofson, Tobias M. Rohmer, Steven E. Schwarzbach, Donald R. Strong, Erik Grijalva, Julian K. Wood, Shannon Skalos, John Y. Takekawa
2016, Ecology and Society (21)
Management actions to protect endangered species and conserve ecosystem function may not always be in precise alignment. Efforts to recover the California Ridgway’s Rail (Rallus obsoletus obsoletus; hereafter, California rail), a federally and state-listed species, and restoration of tidal marsh ecosystems in the San Francisco Bay estuary provide a prime...
Lithospheric rheology constrained from twenty-five years of postseismic deformation following the 1989 Mw 6.9 Loma Prieta earthquake
Mong-Han Huang, Roland Burgmann, Frederick Pollitz
2016, Earth and Planetary Science Letters (435) 147-158
The October 17, 1989 Mw 6.9 Loma Prieta earthquake provides the first opportunity of probing the crustal and upper mantle rheology in the San Francisco Bay Area since the 1906 Mw 7.9 San Francisco earthquake. Here we use geodetic observations including GPS and InSAR to characterize...
Water quality and hydrology of Silver Lake, Oceana County, Michigan, with emphasis on lake response to nutrient loading
Angela K. Brennan, Christopher J. Hoard, Joseph W. Duris, Mary E. Ogdahl, Alan D. Steinman
2016, Scientific Investigations Report 2015-5158
Executive Summary Silver Lake is a 672-acre inland lake located in Oceana County, Michigan, and is a major tourist destination due to its proximity to Lake Michigan and the surrounding outdoor recreational opportunities. In recent years, Silver Lake exhibited patterns of high phosphorus concentrations, elevated chlorophyll a concentrations, and nuisance algal...
The Lassen hydrothermal system
Steven E. Ingebritsen, Deborah Bergfeld, Laura Clor, William C. Evans
2016, American Mineralogist (101) 343-354
The active Lassen hydrothermal system includes a central vapor-dominated zone or zones beneath the Lassen highlands underlain by ~240 °C high-chloride waters that discharge at lower elevations. It is the best-exposed and largest hydrothermal system in the Cascade Range, discharging 41 ± 10 kg/s of steam (~115 MW) and 23...
Will it rise or will it fall? Managing the complex effects of urbanization on base flow
Aditi Bhaskar, Leah Beesley, Matthew J. Burns, T. D. Fletcher, Perrine Hamel, Carolyn Oldham, Allison H. Roy
2016, Freshwater Science (35) 293-310
Sustaining natural levels of base flow is critical to maintaining ecological function as stream catchments are urbanized. Research shows a variable response of stream base flow to urbanization, with base flow or water tables rising in some locations, falling in others, or elsewhere remaining constant. The variable baseflow response is...
Surface-water quality and suspended-sediment quantity and quality within the Big River Basin, southeastern Missouri, 2011-13
Miya N. Barr
2016, Scientific Investigations Report 2015-5171
Missouri was the leading producer of lead in the United States—as well as the world—for more than a century. One of the lead sources is known as the Old Lead Belt, located in southeast Missouri. The primary ore mineral in the region is galena, which can be found both in...
Ecological requirements for pallid sturgeon reproduction and recruitment in the Missouri River—Annual report 2013
Aaron J. Delonay, Robert B. Jacobson, Kimberly A. Chojnacki, Patrick J. Braaten, Kevin J. Buhl, Brandon L Eder, Caroline M. Elliott, Susannah O. Erwin, David B. Fuller, Tyler M. Haddix, Hallie L.A. Ladd, Gerald E. Mestl, Diana M. Papoulias, Jason C. Rhoten, Christopher J. Wesolek, Mark L. Wildhaber
2016, Open-File Report 2015-1197
The Comprehensive Sturgeon Research Project is a multiyear, multiagency collaborative research framework developed to provide information to support pallid sturgeon recovery and Missouri River management decisions. The project strategy integrates field and laboratory studies of pallid sturgeon reproductive ecology, early life history, habitat requirements, and physiology. The project scope of...
Modeled streamflow metrics on small, ungaged stream reaches in the Upper Colorado River Basin
Lindsay V. Reynolds, Patrick B. Shafroth
2016, Data Series 974
Modeling streamflow is an important approach for understanding landscape-scale drivers of flow and estimating flows where there are no streamgage records. In this study conducted by the U.S. Geological Survey in cooperation with Colorado State University, the objectives were to model streamflow metrics on small, ungaged streams in the Upper...
Can pore-clogging by ash explain post-fire runoff?
Cathelijne R. Stoof, Anouk I. Gevaert, Christine Baver, Bahareh Hassanpour, Veronica L. Morales, Wei Zhang, Deborah A. Martin, Shree K. Giri, Tammo S. Steenhuis
2016, International Journal of Wildland Fire (25) 294-305
Ash plays an important role in controlling runoff and erosion processes after wildfire and has frequently been hypothesised to clog soil pores and reduce infiltration. Yet evidence for clogging is incomplete, as research has focussed on identifying the presence of ash in soil; the actual flow processes remain unknown. We...
Ecological relevance of current water quality assessment unit designations in impaired rivers
Megan J. Layhee, Adam J. Sepulveda, Andrew Ray, Greg Mladenka, Lynn Van Every
2016, Science of the Total Environment (536) 198-205
Managers often nest sections of water bodies together into assessment units (AUs) to monitor and assess water quality criteria. Ideally, AUs represent an extent of waters with similar ecological, watershed, habitat and land-use conditions and no overlapping characteristics with other waters. In the United States, AUs are typically based on...
Sediment supply versus local hydraulic controls on sediment transport and storage in a river with large sediment loads
David J. Dean, David J. Topping, John C. Schmidt, Ronald E. Griffiths, Thomas A. Sabol
2016, Journal of Geophysical Research F: Earth Surface (121) 82-110
The Rio Grande in the Big Bend region of Texas, USA, and Chihuahua and Coahuila, Mexico, undergoes rapid geomorphic changes as a result of its large sediment supply and variable hydrology; thus, it is a useful natural laboratory to investigate the relative importance of flow strength and sediment supply in...
Isotopic composition of inorganic mercury and methylmercury downstream of a historical gold mining region
Patrick M. Donovan, Joel D. Blum, Michael B. Singer, Mark C. Marvin-DiPasquale, Martin T.K. Tsui
2016, Environmental Science & Technology (50) 1691-1702
We measured total mercury (THg) and monomethyl mercury (MMHg) concentrations and mercury (Hg) isotopic compositions in sediment and aquatic organisms from the Yuba River (California, USA) to identify Hg sources and biogeochemical transformations downstream of a historical gold mining region. Sediment THg concentrations and δ202Hg decreased from the upper Yuba...
Impacts of Climate Change on Regulated Streamflow, Hydrologic Extremes, Hydropower Production, and Sediment Discharge in the Skagit River Basin
Se-Yeun Lee, Alan F. Hamlet, Eric E. Grossman
2016, Northwest Science (90) 23-43
Previous studies have shown that the impacts of climate change on the hydrologic response of the Skagit River are likely to be substantial under natural (i.e. unregulated) conditions. To assess the combined effects of changing natural flow and dam operations that determine impacts to regulated flow, a new integrated daily-time-step...
