Osmoregulatory role of the intestine in the sea lamprey (Petromyzon marinus)
Andre Barany, Ciaran A Shaughnessy, Juan Fuentes, Juan M Mancera, Stephen D. McCormick
2020, American Journal of Physiology - Regulatory, Integrative and Comparative Physiology (318) R410-R417
Lampreys are the most basal vertebrates with an osmoregulatory strategy. Previous research has established that salinity tolerance of sea lamprey increases dramatically during metamorphosis, but underlying changes in the gut have not been examined. In the present work, we examined changes in intestinal function during metamorphosis and...
Characterization of pallid sturgeon (Scaphirhynchus albus) spawning habitat in the Lower Missouri River
Caroline M. Elliott, Aaron J. Delonay, Kimberly Chojnacki, Robert B. Jacobson
2020, Journal of Applied Ichthyology (36) 25-38
Acipenseriformes (sturgeons and paddlefish) globally have declined throughout their range due to river fragmentation, habitat loss, overfishing, and degradation of water quality. In North America, pallid sturgeon (Scaphirhynchus albus) populations have experienced poor to no recruitment, or substantial levels of hybridization with the closely related shovelnose sturgeon (S. platorynchus). The...
Biomarker similarities between the saline lacustrine Eocene Green River and the Paleoproterozoic Barney Creek Formations
Katherine L. French, Justin E. Birdwell, Michael Vanden Berg
2020, Geochimica et Cosmochimica Acta (274) 228-245
The Paleoproterozoic Barney Creek Formation, which is currently interpreted as a restricted, deep marine paleoenvironment, plays a disproportionate role in our understanding of Proterozoic ocean chemistry and the rise of complex life. The Barney Creek Formation hosts several unusual biomarker features, specifically its methylhopane and carotenoid signatures. Herein, we demonstrate...
Persistence and plasticity in conifer water-use strategies
Max Berkelhammer, Chris Still, Francois Ritter, Matthew Winnik, Lesleigh Anderson, Rosemary Carroll, Mariah Carbone, Kenneth Williams
2020, Journal of Geophysical Research: Biogeosciences (125)
The selective use of seasonal precipitation by vegetation is critical to understanding the residence time and flow path of water in watersheds, yet there are limited datasets to test how climate alters these dynamics. Here, we use measurements of the seasonal cycle of tree ring 18O for two widespread conifer...
Evolution of the submarine–subaerial edifice of Bogoslof volcano, Alaska, during its 2016–2017 eruption based on analysis of satellite imagery
Christopher F. Waythomas, Kim M. Angeli, Rick Wessels
2020, Bulletin of Volcanology (82)
The 2016–2017 eruption of Bogoslof volcano involved at least 70 detected eruptive events between mid-December 2016 and August 30, 2017. Acquisition of high-resolution satellite imagery throughout the duration of the eruptive period allowed us to document and map the various morphologic changes that occurred on the...
Hybrid broadband ground motion simulation validation of small magnitude earthquakes in Canterbury, New Zealand
Robin L. Lee, Brendon A. Bradley, Peter J. Stafford, Robert Graves, Adrian Rodriguez-Marek
2020, Earthquake Spectra (36) 673-699
Ground motion simulation validation is an important and necessary task toward establishing the efficacy of physics-based ground motion simulations for seismic hazard analysis and earthquake engineering applications. This article presents a comprehensive validation of the commonly used Graves and Pitarka hybrid broadband ground motion simulation methodology with...
Development of a global seismic risk model
Vitor Silva, Desmond Amo-Oduro, Alejandro Calderon, Catarina Costa, Jamal Dabbeek, Venetia Despotaki, Luis Martins, Marco Pagani, Anirudh Rao, Michele Simionato, Daniele Vigano, Catalina Yepes-Estrada, Ana Beatriz Acevedo, Helen Crowley, Nick Horspool, Kishor S. Jaiswal, Murray Journeay, Massimiliano Pittore
2020, Earthquake Spectra (36) 372-394
Since 2015 the Global Earthquake Model (GEM) Foundation and its partners have been supporting regional programmes and bilateral collaborations to develop an open global earthquake risk model. These efforts led to the development of a repository of probabilistic seismic hazard models, a global exposure dataset comprising structural and occupancy information...
A classification of streamflow patterns across the coastal Gulf of Alaska
Christopher J. Sergeant, Jeffrey A. Falke, Rebecca A. Bellmore, J. Ryan Bellmore, Ryan L. Crumley
2020, Water Resources Research (56) 1-17
Streamflow controls many freshwater and marine processes, including salinity profiles, sediment composition, fluxes of nutrients, and the timing of animal migrations. Watersheds that border the Gulf of Alaska (GOA) comprise over 400,000 km2 of largely pristine freshwater habitats and provide ecosystem services such as reliable fisheries for local and global food...
High-resolution mapping of the freshwater-brine interface using deterministic and Bayesian inversion of airborne electromagnetic data at Paradox Valley, USA
Lyndsay B. Ball, Paul A. Bedrosian, Burke J. Minsley
2020, Hydrogeology Journal (28) 941-954
Salt loads in the Colorado River Basin are a primary water quality concern. Natural groundwater brine discharge to the Dolores River where it passes through the collapsed salt anticline of the Paradox Valley in western Colorado is a significant source of salt to the Colorado River. An airborne...
Influence of population density and length structure on angler catch rate in kokanee fisheries
Zachary B. Klein, Michael C. Quist, Daniel J. Schill, Andrew M. Dux, Matthew P. Corsi
2020, North American Journal of Fisheries Management (40) 182-189
Management agencies are often charged with providing fisheries that lead to angler participation. Catch rate is one of the primary drivers of angler participation but can be influenced by a suite of factors, including population structure (e.g., density and size structure). The complexity of understanding how population structure influences angler...
Movement dynamics of Smallmouth Bass in a large western river system
Conor McClure, Michael C. Quist, Joseph Kozfkay, Michael Peterson, Daniel J. Schill
2020, North American Journal of Fisheries Management (40) 154-162
The Snake River, Idaho, between Swan Falls and Brownlee dams supports a popular fishery for Smallmouth Bass Micropterus dolomieu. Recently, anglers have expressed concern about harvest of Smallmouth Bass associated with seasonal congregations in and near the lower reaches of several major tributaries. Little is known about Smallmouth Bass movement in...
Overall results and key findings on the use of UAV visible-color, multispectral, and thermal infrared imagery to map agricultural drainage pipes
Barry J. Allred, Luis Martinez, Melake Fessehazion, Greg Rouse, Tanja N. Williamson, DeBonne Wishart, Triven Koganti, Robert Freeland, Neal Eash, Adam Batschelet, Robert Featheringill
2020, Agricultural Water Management (232)
Effective and efficient methods are needed to map agricultural subsurface drainage systems. Visible-color (VIS-C), multispectral (MS), and thermal infrared (TIR) imagery obtained by unmanned aerial vehicles (UAVs) may provide a means for determining drainage pipe locations. Aerial surveys using a UAV with VIS-C, MS, and TIR cameras were conducted at...
Eastern oyster clearance and respiration rates in response to acute and chronic exposure to suspended sediment loads
Megan K. La Peyre, S. K. Bernasconi, R. Lavaud, S. M. Casas, J. F. La Peyre
2020, Journal of Sea Research (157) 1-7
Coastal Louisiana supports some of the most productive areas for the eastern oyster, Crassostrea virginica. Changing conditions from restoration and climate change alter freshwater and sediment inflows into critical estuarine areas affecting water quality, including salinity and concentrations of suspended sediment. This study examined the effects of acute (1 h) and chronic (8 weeks) exposure of...
Conservation genomics in a changing arctic
Jocelyn P. Colella, Sandra L. Talbot, Christian Brochmann, Eric B. Taylor, Eric P. Hoberg, Joseph A. Cook
2020, Trends in Ecology and Evolution (35) 149-162
Although logistically challenging to study, the Arctic is a bellwether for global change and is becoming a model for questions pertinent to the persistence of biodiversity. Disruption of Arctic ecosystems is accelerating, with impacts ranging from mixing of biotic communities to individual behavioral responses. Understanding these changes is crucial for...
Final project memorandum: Identifying conservation objectives for the Gulf Coast habitats of the black skimmer and gull-billed tern
James P. Cronin
2020, Report
Many shorebirds and nearshore waterbirds are of conservation concern across the Gulf of Mexico due to stressors such as human disturbance, predation, and habitat loss and degradation. Conservation and protection of these birds is important for the functioning of healthy ecosystems and for maintaining biodiversity in North America. Consequently, resource...
Pacific Continental Shelf Environmental Assessment (PaCSEA): Characterization of Seasonal Water Masses within the Northern California Current System Using Airborne Remote Sensing off Northern California, Oregon, and Washington, 2011–2012
J A Schulien, Josh Adams, Jonathan J. Felis
2020, Report
Here, we use ocean color measurements (Figure 1) and sea surface temperature (SST) data collected using sensors mounted on low-flying aircraft to characterize NCCS water masses and identify patterns among seasons and between years. To accomplish this, we applied k-means clustering to measured and derived ecologically-relevant physical and bio-optical variables...
Influence of remediation on sediment toxicity within the Grand Calumet River, Indiana, USA
Jeffery A. Steevens, John M. Besser, Rebecca A. Dorman, Daniel W. Sparks
2020, Chemosphere (249)
The Grand Calumet River (GCR), located in northern Indiana, is contaminated due to a wide range of historical industrial activities. This study was conducted to determine the influence of sediment remediation within the GCR on concentrations of chemical contaminants and toxicity to sediment-dwelling organisms. Between 2005 and 2016, sediments with...
Extending seasonal discharge records for streamgage sites on the North Fork Fortymile and Middle Fork Fortymile Rivers, Alaska, through water year 2019
Janet H. Curran
2020, Scientific Investigations Report 2020-5003
Daily mean discharge values were estimated for May 20–September 30 for 1976–82 and 2006–18 for the U.S. Geological Survey North Fork Fortymile River and Middle Fork Fortymile River streamgage sites in Alaska. A relation between study streamgage discharge and discharge for an index streamgage on the main-stem Fortymile River...
Review of studies of composition, toxicology and human health impacts of wastewater from unconventional oil and gas development from shale
Lynn M. Crosby, William H. Orem
2020, Book chapter, A handbook of environmental toxicology: Human disorders and ecotoxicology
Unconventional oil and gas (UOG) extractions has produced large economic benefits. However, prudent management of UOG wastes necessitates a thorough understanding of the complex composition, fate, and potential impacts of wastewater releases. UOG production results in large volumes of wastewater. Despite limited re-use of the wastewater, the majority needs to...
Identification of management thresholds of urban development in support of aquatic biodiversity conservation
Craig D. Snyder, John A. Young
2020, Ecological Indicators (112)
Urbanization degrades stream ecosystems and causes loss of bodiversity. Using benthic macroinvertebrates as a surragate for overall aquatic diversity, we conducted a series of analytical approaches to derive management thresholds of urban development designed to link ecological responses to the primary management goal of protecting aquatic diversity in streams within...
Direct trace element determination in oil and gas produced waters with inductively coupled plasma - Optical emission spectrometry (ICP-OES): Advantages of high salinity tolerance
Aaron M. Jubb, Mark Engle, Jessica Chenault, Madalyn Blondes, Cloelle G. Danforth, Colin Doolan, Tanya Gallegos, Dan Mueller, Jenna Shelton
2020, Geostandards and Geoanalytical Research (44) 385-397
Waters co-produced during petroleum extraction are the largest waste stream from oil and gas development. Reuse or disposal of these waters is difficult due to their high salinities and the sheer volumes generated. Produced waters may also contain valuable mineral commodities. While an understanding of produced water trace element composition...
Mortality of endangered juvenile Lost River Suckers associated with cyanobacteria blooms in mesocosms in Upper Klamath Lake, Oregon
Summer M. Burdick, Danielle M Hereford, Carla M. Conway, Nathan V Banet, Rachel L. Powers, Barbara A. Martin, Diane G. Elliott
2020, Transactions of the American Fisheries Society (149) 245-265
Unsustainably high mortality within the first 2 years of life prevents endangered Lost River Suckers Deltistes luxatus in Upper Klamath Lake, Oregon, from recruiting to spawning populations. Massive blooms of the cyanobacterium Aphanizomenon flos‐aquae and their subsequent death and decay in the lake (bloom‐crashes) are associated with high pH, low percent oxygen saturation, high total...
Differences in antibody responses against Chelonid Alphaherpesvirus 5 (ChHV5) suggest differences in virus biology in ChHV5-seropositive green turtles from Hawaii and ChHV5-seropositive green turtles from Florida
Thierry M. Work, Julie Dagenais, Anna Willimann, George Balazs, Kate Mansfield, Mathias Ackermann
2020, Journal of Virology (94)
Fibropapillomatosis (FP) is a tumor disease associated with a herpesvirus (chelonid herpesvirus 5 [ChHV5]) that affects mainly green turtles globally. Understanding the epidemiology of FP has been hampered by a lack of robust serological assays to monitor exposure to ChHV5. This is due in part to an inability to efficiently...
Predictive relations between acid-base chemistry and fish assemblages in streams of the Adirondack Mountains
Diane Bertok, Barry P. Baldigo, Scott D. George
2020, NYSERDA Report 20-04
Surface waters across much of New York State’s Adirondack Mountains were acidified in the late 20th century but began to recover following the 1990 Title IV Amendments to the Clean Air Act. Previous assessments of acidification recovery in the Adirondacks have generally been based on surface water chemistry data and...
Infrasound generated by the 2016-2017 shallow submarine eruption of Bogoslof volcano, Alaska
John J. Lyons, Alexandra M. Iezzi, David Fee, Hans Schwaiger, Aaron Wech, Matthew M. Haney
2020, Bulletin of Volcanology (82)
The 2016–2017 shallow submarine eruption of Bogoslof volcano produced numerous infrasound signals over 9 months that were recorded on six Alaska Volcano Observatory (AVO) arrays at ranges of 59 to over 800 km from the volcano. The lack of geophysical monitoring near Bogoslof and the repeated production of volcanic clouds to flight...
