Alaskan Yelloweye Rockfish fecundity revealed through an automated egg count and digital imagery method
Donald E. Arthur, Jeffrey A. Falke, Brittany J. Blain-Roth, Trent M. Sutton
2023, North American Journal of Fisheries Management (42) 828-838
Spawning stock biomass (SSB) is often used as an index for reproductive potential (RP) in fisheries stock assessments. This method assumes that mature female biomass is proportional to total egg production and implies that (1) the fecundity–length relationship follows a cubic function or (2)...
Population connectivity of aquatic insects in a dam-regulated, desert river
Erin F. Abernethy, Jeffrey Muehlbauer, Theodore Kennedy, Katie E. Dziedzic, Holland Elder, Molly K. Burke, David A. Lytle
2023, River Research and Applications (39) 364-374
Humans have exaggerated natural habitat fragmentation, negatively impacting species dispersal and reducing population connectivity. Habitat fragmentation can be especially detrimental in freshwater populations, whose dispersal is already constrained by the river network structure. Aquatic insects, for instance, are generally limited to two primary modes...
2022 Crustal Deformation Modeling Workshop Report
Brad T. Aagaard, Sylvain Barbot, Brittany Erickson, Matthew Knepley, Mark Simons, Charles Williams
2023, Report
The 2022 Crustal Deformation Modeling Workshop was held June 20–24 at the Colorado School of Mines in Golden, Colorado. The workshop included two days of tutorials on the use of the open-source software PyLith for crustal deformation modeling followed by three days of science talks and discussions. The workshop focused...
Using physiological conditions to assess current and future habitat use of a Subarctic frog
T. Hastings, Blake R. Hossack, L. Fishback, J. M. Davenport
2023, Integrative Zoology (18) 2-14
Species with especially close dependence on the environment to meet physiological requirements, such as ectotherms, are highly susceptible to the impacts of climate change. Climate change is occurring rapidly in the Subarctic and Arctic, but there is limited knowledge on ectotherm physiology in these landscapes. We...
Estimating the aboveground biomass and carbon stocks of tall shrubs in a prerestoration degraded salt marsh
Jacqualyn Fouse, Meagan J. Eagle, Kevin D. Kroeger, Timothy P. Smith
2023, Restoration Ecology (31)
Wetlands play a vital role in Earth's carbon cycle and provide important ecosystem services. Their ability to perform their roles can be compromised by human activities that destroy or impair their functioning. The restoration of degraded wetlands may allow carbon cycle functioning, as well as other...
Luminescence ages and new interpretations of the timing and deposition of Quaternary sediments at Natural Trap Cave, Wyoming
Shannon A. Mahan, John R. Wood, Dave M Lovelace, Juan Laden, Jenny McGuire, Julie Meachen
2023, Quaternary International (647-648) 22-35
Natural Trap Cave, located in the Big Horn Mountains of north-central Wyoming, has a history of trapping and preserving a range of North American fauna that plummeted into the deep vertical entrance. These animal remains were buried and preserved within sediments of the main chamber and, in turn, have...
The Hawai'i groundwater recharge tool
Jared H. McLean, Sean B. Cleveland, Kolja Rotzoll, Scot K. Izuka, Jason Leigh, Gwen A. Jacobs, Ryan Theriot
2023, Concurrency and Computation: Practice and Experience (35)
This article discusses the design and implementation of the Hawai’i Groundwater Recharge Tool, an application for providing data and analyses of the impacts of land-cover modifications and changes in precipitation on groundwater-recharge rates for the island of O’ahu. This application uses simulation data based on a set of 29 land-cover types and 2 precipitation...
Winter habitat selection and efficacy of telemetry to aid Grass Carp removal efforts in a large reservoir
Tyler Michael Hessler, Duane Chapman, Craig P. Paukert, Jeff C. Jolley, Michael E. Byrne
2023, North American Journal of Fisheries Management (43) 189-202
Grass Carp Ctenopharyngodon idella were introduced in North America to control aquatic vegetation in small, closed systems. However, when they escape into larger systems in which they can reproduce, they have the potential to cause significant declines and alterations in aquatic vegetation communities. These alterations can in turn affect native species that...
Early Pliocene marine transgression into the lower Colorado River valley, southwestern USA, by re-flooding of a former tidal strait
Rebecca Dorsey, Juan Carlos Braga, Kevin Gardner, Kristin McDougall-Reid, Brennan O’Connell
2023, Book chapter, Straits and seaways: Controls, processes and implications in modern and ancient systems
Marine straits and seaways are known to host a wide range of sedimentary processes and products, but the role of marine connections in the development of large river systems remains little studied. This study explores a hypothesis that shallow-marine waters flooded the lower Colorado River valley at c. 5 Ma along a...
Signatures of high-latitude waves in observations of geomagnetic acceleration
Rodrigo Chi-Duran, Margaret Susan Avery, Bruce Buffett
2023, Geophysical Research Letters (48)
Models for the second time-derivative of the geomagnetic field reveal prominent activity at high latitudes. Alternating patches of positive and negative geomagnetic acceleration propagate to the west at speeds that exceed nominal fluid velocities in the core. We show that waves are a viable interpretation of these...
Supplemental vegetation monitoring plots at Wind Cave National Park to accelerate learning of the Annual Brome Adaptive Management (ABAM) model: 2021 annual report
Amy Symstad, Steven Bekedam
2022, Report
This study provides data on management actions aiming to reduce invasive annual grass abundance in National Park Service units of the northern Great Plains. This report provides an annual status update on the study at Wind Cave National Park....
How shall we meet? Embracing the opportunities of virtual conferencing
Robert J. Rolls, Jane S. Rogosch, Lauren M. Kuehne
2022, Fisheries Magazine (47) 304-306
The SARS-CoV-2 (COVID-19) pandemic triggered dramatic shifts in the way that ecologists teach, research, and interact (e.g., Cooke et al. 2021). As the world now adjusts to a “new normal” era, there is notable and open discussion about the merits or desire to return to...
Effect of wave skewness and asymmetry on the evolution of Fire Island, New York
Muhammed Parlak, Bilal Ayhan, John C. Warner, Tarandeep S. Kalra, Ilgar Safak
2022, Conference Paper
Bedload transport of sediment by waves and currents is one of the key physical processes that affect the evolution of coasts, nearshore areas, and the engineering practices there. Wave skewness and asymmetry, both of which increase as waves shoal, result in a net bedload sediment flux over a wave cycle....
Paleoseismic study of the XEOLXELEK–Elk Lake fault: A newly identified Holocene fault in thenorthern Cascadia forearc near Victoria, British Columbia, Canada
Nicolas Harrichhausen, Theron Finley, Kristin D. Morell, Christine Regalla, Scott E.K. Bennett, Lucinda J. Leonard, Edwin Nissen, Eleanor McLeod, Emerson M. Lynch, Guy Salomon, Israporn Sethanant
2022, Conference Paper, Proceedings of the 11th International INQUA Workshop on Paleoseismology, Active Tectonics and Archaeoseismology
High-resolution topographic data show a tectonic scarp formed in Quaternary sediments near the city of Victoria in the northern Cascadia forearc on Vancouver Island, British Columbia, Canada. A paleoseismic trench excavation across the structure, the XEOLXELEK–Elk Lake fault, shows evidence for a Holocene (after 12.2 cal ka BP) surface-rupturing reverse-slip earthquake...
Extending body condition scoring beyond measurable rump fat to estimate full range of nutritional condition for moose
Rebecca L. Levine, Rachel A. Smiley, Brett R. Jesmer, Brendan A. Oates, Jacob R. Goheen, Thomas R. Stephenson, Matthew J. Kauffman, Gary L. Fralick, Kevin L. Monteith
2022, Alces (58) 91-99
Moose (Alces alces) populations along the southern extent of their range are largely declining, and there is growing evidence that nutritional condition — which influences several vital rates – is a contributing factor. Moose body condition can presently be estimated only when there is measurable subcutaneous rump fat, which equates...
VIMTS: Variational-based Imputation for Multi-modal Time Series
Xiaowei Jia, Jennifer H. Fair, Benjamin Letcher
2022, Conference Paper, IEEE International Conference on Big Data Proceedings
Multi-modal time series data in real applications often contain data of different dimensionalities, e.g., high-dimensional modality such as image data series, and low-dimensional univariate time series. Multi-modal time series data with missing high-dimensional modal values are ubiquitous in real-world classification and regression applications. To accurately...
New indicators of ecological resilience and invasion resistance to support prioritization and management in the sagebrush biome, United States
Jeanne C. Chambers, Jessi L. Brown, John B. Bradford, David I. Board, Steven B. Campbell, Karen J. Clause, Brice Hanberry, Daniel Rodolphe Schlaepfer, Alexandra K. Urza
2022, Frontiers in Ecology and Evolution (10)
Ecosystem transformations to altered or novel ecological states are accelerating across the globe. Indicators of ecological resilience to disturbance and resistance to invasion can aid in assessing risks and prioritizing areas for conservation and restoration. The sagebrush biome encompasses parts of 11 western states and is experiencing rapid transformations...
Hydrogen isotope behavior during rhyolite glass hydration under hydrothermal conditions
Michael R. Hudak, Ilya N. Bindeman, James M. Watkins, Jacob B. Lowenstern
2022, Geochimica et Cosmochimica Acta (337) 33-48
The diffusion of molecular water (H2Om) from the environment into volcanic glass can hydrate the glass up to several wt% at low temperature over long timescales. During this process, the water imprints its hydrogen isotope composition (δDH2O) to the glass (δDgl) offset by a glass-H2O fractionation factor (ΔDgl-H2O = δDgl – δDH2O) which is approximately −33‰ at Earth...
The source, fate, and transport of arsenic in the Yellowstone hydrothermal system - An overview
R. Blaine McCleskey, D. Kirk Nordstrom, Shaul Hurwitz, Daniel R. Colman, David A. Roth, Madeline Oxner Johnson, Eric S. Boyd
2022, Journal of Volcanology and Geothermal Research (432)
The Yellowstone Plateau Volcanic Field (YPVF) contains >10,000 thermal features including hot springs, pools, geysers, mud pots, and fumaroles with diverse chemical compositions. Arsenic (As) concentrations in YPVF thermal waters typically range from 0.005 to 4 mg/L, but an As concentration of 17 mg/L has been reported. Arsenic data from thermal springs,...
Water and endangered fish in the Klamath River Basin: Do Upper Klamath Lake surface elevation and water quality affect adult Lost River and Shortnose Sucker survival?
Jacob Richard Krause, Eric C. Janney, Summer M. Burdick, Alta C. Harris, Brian S. Hayes
2022, North American Journal of Fisheries Management (42) 1414-1432
In the western United States, water allocation decisions often incorporate the needs of endangered fish. In the Klamath River basin, an understanding of temporal variation in annual survival rates of Shortnose Suckers Chasmistes brevirostris and Lost River Suckers Deltistes luxatus and their relation to environmental drivers is critical to water...
Machine learning for understanding inland water quantity, quality, and ecology
Alison P. Appling, Samantha K. Oliver, Jordan Read, Jeffrey Michael Sadler, Jacob Aaron Zwart
Thomas Mehner, Klement Tockner, editor(s)
2022, Book chapter, Encyclopedia of inland waters
This chapter provides an overview of machine learning models and their applications to the science of inland waters. Such models serve a wide range of purposes for science and management: predicting water quality, quantity, or ecological dynamics across space, time, or hypothetical scenarios; vetting and distilling raw data for further...
Modeling reservoir release using pseudo-prospective learning and physical simulations to predict water temperature
Xiaowei Jia, Shengyu Chen, Yiqun Xie, Haoyu Yang, Alison P. Appling, Samantha K. Oliver, Zhe Jiang
Arindam Banerjee, Zhi-Hua Zhou, Evangelos E. Papalexakis, Matteo Riondato, editor(s)
2022, Conference Paper, Proceedings of the 2022 SIAM International Conference on Data Mining (SDM)
This paper proposes a new data-driven method for predicting water temperature in stream networks with reservoirs. The water flows released from reservoirs greatly affect the water temperature of downstream river segments. However, the information of released water flow is often not available for many reservoirs, which makes it difficult for...
Ground motion selection for nonlinear response history analyses of concrete dams
N. Simon Kwong
2022, Conference Paper, 2022 USSD annual conference & exhibition
Evaluating the seismic performance of a 3D concrete dam using nonlinear response history analysis (NLRHA) requires three orthogonal components of ground acceleration histories, or ground motions (GMs) for brevity. Although much progress has been made for the topic of ground motion selection and modification (GMSM) in the context of multistory...
Status and trends in the Lake Superior fish community, 2020
Mark R. Vinson, Lori M. Evrard, Owen Gorman, Daniel L. Yule
2022, Report
The Lake Superior fish community within Management Unit WI-2 was sampled in July 2020 with daytime bottom trawls at 11 nearshore stations. The 11 locations sampled were long-term monitoring sites that had been annually sampled since 1974. In 2020, the number of species collected at each site ranged from 0...
A review of Arctomecon californica (Papaveraceae) with a focus on the species’ potential for propagation and reintroduction and conservation needs
Alexander Stosich, Lesley A. DeFalco, Sara J. Scoles-Sciulla
2022, Monographs of the Western North American Naturalist (14) 1-22
Las Vegas bearpoppy (Arctomecon californica) occurrences have fluctuated during the past several decades, in part due to interannual variability in rainfall that influences recruitment and mortality events; yet, development in the Las Vegas Valley continues to threaten habitat supporting this species. Arctomecon californica was petitioned for listing under the Endangered Species Act...
