Validating a non-lethal method of aging endangered juvenile Lost River and Shortnose Suckers
Barbara A. Martin, Summer M. Burdick, Rachael Katelyn Paul-Wilson, Ryan J Bart
2023, Journal of Fish and Wildlife Management (14) 121-134
Populations of imperiled Lost River Deltistes luxatus and Shortnose Chasmistes brevirostris suckers in Upper Klamath Lake, Oregon, are experiencing long-term decreases in abundance due to limited recruitment of juvenile suckers into the adult populations. Researchers use estimated ages based on fin rays to study environmental factors affecting...
Wind-energy development alters pronghorn migration at multiple scales
Megan C. Milligan, Aaron N. Johnston, Jeffery L. Beck, Kaitlyn L. Taylor, Embere Hall, Lee Knox, Teal Cufaude, Cody F. Wallace, Geneva W. Chong, Matthew Kauffman
2023, Ecology and Evolution (13)
Migration is a critical behavioral strategy necessary for population persistence and ecosystem functioning, but migration routes have been increasingly disrupted by anthropogenic activities, including energy development. Wind energy is the world's fastest growing source of electricity and represents an important alternative to hydrocarbon extraction, but its...
Sound-side inundation and seaward erosion of a barrier island during hurricane landfall
Christopher R. Sherwood, Andrew C. Ritchie, Jin-Si R. Over, Christine J. Kranenburg, Jonathan A. Warrick, Jenna A. Brown, Wayne Wright, Alfredo Aretxabaleta, Sara Zeigler, Phillipe Alan Wernette, Daniel D. Buscombe, Christie Hegermiller
2023, JGR - Earth Surface (128)
Barrier islands are especially vulnerable to hurricanes and other large storms, owing to their mobile composition, low elevations, and detachment from the mainland. Conceptual models of barrier-island evolution emphasize ocean-side processes that drive landward migration through overwash, inlet migration, and aeolian transport. In contrast, we found that...
Evaluating the spatial and temporal variability of groundwater uptake by riparian vegetation in a humid southeastern US catchment
Jeffrey W. Riley, Luke A. Pangle, Brent T. Aulenbach
2023, Ecohydrology (16)
In environments with shallow water tables, vegetation may use groundwater to support transpiration (TG). This process has been carefully studied in some arid climates but rarely in humid climates—even those with severe droughts and seasonal water deficits. As such, the role of TG in humid-catchment hydrology is...
Connecting habitat to species abundance: The role of light and temperature on the abundance of walleye in lakes
Shad Mahlum, Kelsey Vitense, Hayley R. Corson-Dosch, Lindsay Platt, Jordan Read, Patrick J Schmalz, Melissa Treml, Gretchen J.A. Hansen
2023, Canadian Journal Fisheries and Aquatic Sciences (80) 273-286
Walleye (Sander vitreus) are an ecologically important species managed for recreational, tribal, and commercial harvest. Walleye prefer cool water and low light conditions, and therefore changing water temperature and clarity potentially impacts walleye habitat and populations across the landscape. Using survey data collected from 1993 to 2018 from...
Territories within groups: The dynamic competition of drift-feeding juvenile Chinook salmon in 3-dimensional space
Jason R. Neuswanger, Amanda E. Rosenberger, M. S. Wipfli, Nicholas F. Hughes
2023, Canadian Journal of Fisheries and Aquatic Sciences (80) 346-359
Salmonid populations are often regulated by territorial competition among juveniles for food and space. In the canonical view, salmonid territories are spaced horizontally across the river bottom in a 2-D mosaic. However, some juveniles instead feed in tight, three-dimensional (3-D) social groups. To investigate whether territoriality is possible within such...
A comprehensive multi-state conditional occupancy model for evaluating interactions of non-native and native species
Patti J. Wohner, Paul D. Scheerer, Michael H. Meeuwig, James Peterson
2023, Frontiers in Ecology and Evolution (10)
A major challenge in ecology is disentangling interactions of non-native, potentially invasive species on native species. Conditional two-species occupancy models examine the effects of dominant species (e.g., non-native) on subordinate species (e.g., native) while considering the possibility that occupancy of one species may affect occupancy and/ or detection of...
Long-term, high-resolution permafrost monitoring reveals coupled energy balance and hydrogeologic controls on talik dynamics near Umiujaq (Nunavik, Québec, Canada)
Philippe Fortier, Jean-Michel Lemieux, Nathan L Young, Michelle A. Walvoord, Richard Fortier
2023, Water Resources Research (59)
Rising temperatures in the Arctic and subarctic are driving the rapid thaw of permafrost by reducing permafrost cooling, increasing active layer thickness, and promoting talik formation. In this study, the cyrohydrogeology of a permafrost mound located within the discontinuous permafrost zone near Umiujaq (Nunavik, Québec, Canada) is...
Paleomagnetically defined brief lifespans for two large shield volcanoes in the Cascades Arc
Anthony Francis Pivarunas, Dawnika L. Blatter, L.J. Patrick Muffler, Michael A. Clynne, Andrew T. Calvert, Lauren N Harrison, R.L. Christiansen
2023, Journal of Volcanology and Geothermal Research (434)
Mafic to intermediate shield volcanoes with multi-cubic-kilometer eruptive volumes are common in the Cascades Volcanic Arc, but little is known about their eruptive histories as either singular or sustained episodes, or the total time required for their construction. Paleomagnetic data were...
Ages of the granitic basement of Long Valley Caldera, California, USA, and siting of the Quaternary granite-rhyolite pluton
Edward Hildreth, Judith E. Fierstein, Jorge A. Vazquez
2023, GSA Bulletin (135) 2753-2766
The leucogranitic crystal-mush pluton beneath the iconic Long Valley Caldera, California, USA, released >820 km3 of crystal-poor Pleistocene rhyolite, which was hosted by numerous Mesozoic granitic plutons, only a few of which had been dated until now. Reported here are U-Pb zircon ages, determined...
Multi-scale effects of land cover, weather, and fire on Columbian sharp-tailed grouse
Bryan S. Stevens, Courtney J. Conway, Jeffrey M. Knetter, Shane B. Roberts, Patrick Donnelly
2023, Journal of Wildlife Management (87)
Columbian sharp-tailed grouse (Tympanuchus phasianellus columbianus) are endemic to grassland and shrub-steppe ecosystems of western North America, yet their distribution has contracted to <10% of their historical range. Primary threats to Columbian sharp-tailed grouse include loss of native habitat and conversion to agriculture, reductions in habitat once provided by the...
Aerial application of organic pellets eliminates Lake Trout recruitment from a primary spawning reef in Yellowstone Lake
Todd M. Koel, Philip D. Doepke, Drew J. MacDonald, Nathan A. Thomas, Cody W. Vender, Hayley C. Glassic, Alex S. Poole, Christopher S. Guy, Alexander V. Zale
2023, North American Journal of Fisheries Management (43) 505-516
Invasive Lake Trout Salvelinus namaycush in the Yellowstone Lake ecosystem have been gillnetted since 1995 to suppress the population and allow for recovery of native Yellowstone Cutthroat Trout Oncorhynchus clarkii bouvieri. Although gillnetting is effective (Lake Trout population growth rate λ ≤ 0.6 during 2012–2022), the effort only targets...
Differential shortstopping behaviour in Whooping Cranes: Habitat or social learning?
Philipp Mendgen, Sarah J. Converse, Aaron T. Pearse, Claire S. Teitelbaum, Thomas Mueller
2023, Global Ecology and Conservation (41)
Many migratory bird species have begun shifting their wintering grounds closer to their breeding grounds, shortening their yearly migration distance through a behavior called shortstopping. While multiple studies have investigated possible drivers, it remains unclear why only some populations adopt this behavior.We studied the differential occurrence of shortstopping in two...
Simulating post-dam removal effects of hatchery operations and disease on juvenile Chinook salmon (Oncorhynchus tshawytscha) production in the Lower Klamath River, California
Russell W. Perry, John M. Plumb, Michael J. Dodrill, Nicholas A. Som, H. Eve Robinson, Nicholas J. Hetrick
2023, Open-File Report 2022-1106
Executive SummaryThe Federal Energy Regulatory Commission has been considering the approval to breach four dams on lower Klamath River in southern Oregon and northern California. Approval of this application would allow for Strikeouts indicate text deletion hereafter. decommissioning and dam removal, beginning as early as 2023. This action would...
Quality of groundwater used for domestic supply in the Modesto, Turlock, and Merced Subbasins of the San Joaquin Valley, California
Zeno F. Levy, Mariia Balkan, Jennifer L. Shelton
2023, Open-File Report 2022-1116
Summary More than 2 million Californians rely on groundwater from privately owned domestic wells for drinking-water supply. This report summarizes a water-quality survey of domestic and small-system drinking-water supply wells in the Modesto, Turlock, and Merced subbasins of the San Joaquin Valley where more than 78,000 residents are...
Modeling coho salmon (Oncorhynchus kisutch) population response to streamflow and water temperature extremes
J. Ryan Bellmore, Christopher J. Sergeant, Rebecca A. Bellmore, Jeffrey A. Falke, Jason B. Fellman
2023, Article
Models that assess the vulnerability of freshwater species to shifting environmental conditions do not always account for short-duration extremes, which are increasingly common. Life cycle models for Pacific salmon (Oncorhynchus spp.) generally focus on average conditions that fish experience during each life stage, yet many floods, low flows, and elevated water...
Vertical transmission of Renibacterium salmoninarum in cutthroat trout (Oncorhynchus clarkii)
Tawni B. Riepe, Eric R. Fetherman, Brad Neuschwanger, Tracy Davis, Andrew Perkins, Dana L. Winkelman
2023, Journal of Fish Diseases (46) 309-319
Vertical transmission of Renibacterium salmoninarum has been well-documented in anadromous salmonids but not in hatchery-reared inland trout. We assessed whether the bacterium is vertically transmitted in cutthroat trout (Oncorhynchus clarkii) from a Colorado, USA hatchery, and assessed the rate of transmission from male and female brood fish. Adult brood fish were killed,...
Skinks of Oceania, New Guinea, and Eastern Wallacea: An underexplored biodiversity hotspot
Alex Slavenko, Allen Allison, Christopher C. Austin, Aaron Bauer, Rafe M. Brown, Robert N. Fisher, Ivan Ineich, Bulisa Iova, Benjamin R. Karin, Frederick Kraus, Sven Mecke, Shai Meiri, Clare Morrison, Paul M. Oliver, Mark O'Shea, Jonathan Q. Richmond, Glenn M. Shea, Oliver J. S. Tallowin, David G. Chapple
2023, Pacific Conservation Biology (29) 526-543
Context: Skinks comprise the dominant component of the terrestrial vertebrate fauna in Oceania, New Guinea, and Eastern Wallacea (ONGEW). However, knowledge of their diversity is incomplete, and their conservation needs are poorly understood.Aims: To explore the diversity and threat status of the skinks of ONGEW and identify knowledge gaps and conservation needs.Methods: We...
Out of the frying pan and into the fire: Effects of volcanic heat and other stressors on the conservation of a critically endangered plant in Hawaiʻi
Nathan S. Gill, Jeff Stallman, Linda Pratt, Jennifer L. Lewicki, Tamar Elias, Patricia A. Nadeau, Stephanie G. Yelenik
2023, Environmental Conservation (20) 108-115
Loss of local biodiversity resulting from abrupt environmental change is a significant environmental problem throughout the world. Extinctions of plants are particularly important yet are often overlooked. Drawing from a case in Hawai‘i, a global hotspot for plant and other extinctions, we demonstrate an effort to better understand and determine...
Round goby detection in Lakes Huron and Michigan— An evaluation of eDNA and fish catches
Katarzyna Przybyla-Kelly, Ashley M. Spoljaric, Meredith B. Nevers
2023, Fishes (8)
Aquatic surveys for fish in large water bodies (e.g., Laurentian Great Lakes of North America) often require a flexible approach using multiple methods, surveying different depths, and sampling across seasons, especially when the target species is elusive in its natural habitat. The round goby (Neogobius melanostomus) is an invasive,...
Comparison of community practitioner and clinical educator expectations of veterinary graduates
Amy Nichelason, Nathan Roy Bollig, Tom Bach, Molly Harris, Peggy Schmidt
2023, Journal of Veterinary Medical Education (50) 582-589
One goal of veterinary curricular development and revision is to ensure graduating veterinarians meet entry-level competencies to perform successfully in their community. Most curricula are developed by clinical educators in a university setting; therefore, we must determine whether clinical educators can predict community practitioner expectations. This article...
Gross alpha-particle activity and high 226Ra concentrations do not correspond with high 210Po in the Atlantic and Gulf Coastal Plain aquifers of the United States
Zoltan Szabo, Charles A. Cravotta III, Paul E. Stackelberg, Kenneth Belitz
2023, Environmental Science & Technology Water (3) 262-274
210Po, which is of human-health concern based on lifetime ingestion cancer risk, is indirectly regulated in drinking water through the U.S. Environmental Protection Agency’s gross alpha-particle activity (GAPA) maximum contaminant level of 15 pCi/L (picocuries per liter). This regulation requires independent measurement of 226Ra for samples exceeding...
Intensified warming and aridity accelerate terminal lake desiccation in the Great Basin of the western United States
Dorothy K. Hall, John S. Kimball, Ron Larson, Nicolo E. DiGirolamo, Kimberly Ann Casey, Glynn Hulley
2023, Earth and Space Science (10)
Terminal lakes in the Great Basin (GB) of the western US host critical wildlife habitat and food for migrating birds and can be associated with serious human health and economic consequences when they desiccate. Water levels have declined dramatically in the last 100+ years due to diversion...
Vertical transmission of Renibacterium salmoninarum in cutthroat trout (Oncorhynchus clarkii)
Tawni B. Riepe, Eric R. Fetherman, Brad Neuschwanger, Tracy Davis, Andrew Perkins, Dana L. Winkelman
2023, Journal of Fish Diseases (46) 309-319
Vertical transmission of Renibacterium salmoninarum has been well-documented in anadromous salmonids but not in hatchery-reared inland trout. We assessed whether the bacterium is vertically transmitted in cutthroat trout (Oncorhynchus clarkii) from a Colorado, USA hatchery, and assessed the rate of transmission from male and female brood fish....
Assessment of continuous oil and gas resources in the Lower Saxony Basin of Germany, 2020
Christopher J. Schenk, Tracey J. Mercier, Cheryl A. Woodall, Thomas M. Finn, Kristen R. Marra, Heidi M. Leathers-Miller, Phuong A. Le, Ronald M. Drake II, Geoffrey S. Ellis
2023, Fact Sheet 2022-3081
Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 321 million barrels of shale oil and 435 billion cubic feet of shale gas in the Lower Saxony Basin, Germany....
