Optical properties of dissolved organic matter in throughfall and stemflow vary across tree species and season in a temperate headwater forest
Kevin A Ryan, Thomas Adler, Ann T. Chalmers, Julia Perdrial, Stephen Sebestyen, James B. Shanley, Aron Stubbins
2023, Biogeochemistry (164) 53-72
Tree-derived dissolved organic matter (DOM) comprises a significant carbon flux within forested watersheds. Few studies have assessed the optical properties of tree-derived DOM. To increase understanding of the factors controlling tree-derived DOM quality, we measured DOM optical properties, dissolved organic carbon (DOC) and calcium concentrations in throughfall and stemflow for...
Hydrologic modeling of a perennial firn aquifer in southeast Greenland
Olivia Miller, Clifford I. Voss, D. Kip Solomon, Clement Miege, Richard Forster, Nicholas Schmerr, Lynn Montgomery
2023, Journal of Glaciology (69) 607-622
A conceptual model, based on field observations and assumed physics of a perennial firn aquifer near Helheim Glacier (southeast Greenland), is evaluated via steady-state 2-D simulation of liquid water flow and energy transport with phase change. The simulation approach allows natural representation of flow and energy advection...
Estimation of the water table position in unconfined aquifers with MODFLOW 6
Paulo A. Herrera, Christian D. Langevin, Glenn Hammond
2023, Groundwater (61) 648-662
The numerical estimation of the position of the water table in unconfined aquifers is important for many practical applications. Its determination through observations or analytical methods is restricted to a few cases. Therefore, it is often estimated through numerical simulations, which may be affected by numerical...
Automating sandhill crane counts from nocturnal thermal aerial imagery using deep learning
Emilio Luz-Ricca, Kyle Lawrence Landolt, Bradley A. Pickens, Mark D. Koneff
2023, Remote Sensing in Ecology and Conservation (9) 182-194
Population monitoring is essential to management and conservation efforts for migratory birds, but traditional low-altitude aerial surveys with human observers are plagued by individual observer bias and risk to flight crews. Aerial surveys that use remote sensing can reduce bias and risk, but manual counting of wildlife in imagery is...
Ontogenetic development of pallid sturgeon (Scaphirhynchus albus) and shovelnose sturgeon (Scaphirhynchus platorynchus) from hatch through yolk absorption
Kimberly Chojnacki, Marlene J Dodson, Amy E. George, James Candrl, Aaron J. DeLonay
2023, Ecology of Freshwater Fish (32) 209-231
Sturgeons have a complex free-embryo period extending from hatch to the initiation of exogenous feeding. Although available for some sturgeon species of the genus Acipenser, descriptions of the developmental stages of free embryos of the genus Scaphirhynchus are lacking. We characterised the ontogenetic development of pallid sturgeon (Scaphirhynchus albus) and shovelnose sturgeon (S. platorynchus)...
Predictive accuracy of post-fire conifer death declines over time in models based on crown and bole injury
Timothy M. Shearman, J. Morgan Varner, Sharon M. Hood, Phillip J. van Mantgem, C. Alina Cansler, Micah C. Wright
2023, Ecological Applications (33)
A key uncertainty of empirical models of post-fire tree mortality is understanding the drivers of elevated post-fire mortality several years following fire, known as delayed mortality. Delayed mortality can represent a substantial fraction of mortality, particularly for large trees that are a conservation focus in western US coniferous forests. Current...
Repeat bathymetric surveys and model simulation of sedimentation processes near fish spawning placements, Detroit and St. Clair Rivers, Michigan
Paul J. Kinzel, Gregory W. Kennedy, Taylor Dudunake
2023, Conference Paper, Proceedings of the SEDHYD 2023
Nine rock-rubble fish spawning placements, or artificial reef complexes, constructed in the Detroit and St. Clair Rivers between 2004 to 2018 were surveyed periodically with multibeam sonar. These serial bathymetric surveys, conducted in 2015, 2018, 2021, and 2022, identified active sand bedform fields impinging two reef complexes: Fighting Island in...
Guide for interpreting and reporting luminescence dating results
Shannon A. Mahan, Tammy M. Rittenour, Michelle S. Nelson, Nina Ataee, Nathan D. Brown, Regina DeWitt, Julie Durcan, Mary Evans, James K. Feathers, Marine Frouin, Guillaume Guerin, Maryam Heydari, Sebastien Huot, Mayank Jain, Amanda Keen-Zebert, Bo Li, Gloria I. Lopez, Christina Neudorf, Naomi Porat, Kathleen Rodrigues, Andre O. Sawakuchi, Joel Q. G Spencer, Kristina Thomsen
2023, GSA Bulletin (135) 1480-1502
The development and application of luminescence dating and dosimetry techniques have grown exponentially in the last several decades. Luminescence methods provide age control for a broad range of geological and archaeological contexts and can characterize mineral and glass properties linked to geologic origin, Earth-surface processes, and past exposure to light,...
A life cycle model for evaluating estuary residency and restoration potential in Chinook salmon
Emily K. Chen, Nicholas A. Som, John Deibner-Hanson, David G. Anderson, Mark J. Henderson
2023, Fisheries Research (257)
Understanding the spatial and temporal habitat use of a population is a necessary step for recovery planning. For Chinook salmon (Oncorhynchus tshawytscha), variation in their migration and habitat use complicate predicting how restoring habitats could impact total recruitment. To evaluate how juvenile life history variation affects a population’s response to...
Prioritizing pesticides of potential concern and identifying potential mixture effects in Great Lakes tributaries using passive samplers
Luke C. Loken, Steven R. Corsi, David A. Alvarez, Gerald T. Ankley, Austin K. Baldwin, Bradley D. Blackwell, Laura A. DeCicco, Michelle A. Nott, Samantha K. Oliver, Daniel L. Villeneuve
2023, Environmental Toxicology and Chemistry (42) 340-366
To help meet the objectives of the Great Lakes Restoration Initiative with regard to increasing knowledge about toxic substances, 223 pesticides and pesticide transformation products were monitored in 15 Great Lakes tributaries using polar organic chemical integrative samplers. A screening-level assessment of their potential for biological...
Biostratigraphically significant palynofloras from the Paleocene–Eocene boundary of the USA
Vera A. Korasidis, Scott L. Wing, Guy J. Harrington, Thomas Demchuk, J. Gfavendyck, Phillip E. Jardine, Debra A. Willard
2023, Palynology (47)
Pollen and spores were recovered from the Paleocene Fort Union Formation and Paleocene–Eocene Willwood Formation of the Bighorn Basin (BHB), northwestern Wyoming, USA. In many local stratigraphic sections in the BHB, the base of the Eocene has been identified by the characteristic negative carbon isotope excursion (CIE) that marks the...
Taking steps to address inequities in open-access publishing through an early career publication honor
Scott Hotaling, Bridget R. Deemer, Kelsey Poulson-Ellestad, Laura J. Falkenberg
2023, Limnology and Oceanography Letters (8) 385-387
Access to resources—whether human, financial, or social—is a key indicator of research output and, in turn, academic career progression. However, resources are not equally distributed among scientists and disparities often stem from external factors. This reality is particularly impactful for early career researchers (ECRs) who have limited control over the...
High-resolution 3D forest structure explains ecomorphological trait variation in assemblages of saproxylic beetles
Lukas Drag, Ryan C. Burner, Jorg G. Stephan, Tone Birkemoe, Inken Dorfler, Martin M. Gossner, Paul Magdon, Otso Ovaskainen, Maria Potterf, Peter Schall, Tord Snall, Anne Sverdrup-Thygeson, Wolfgang Weisser, Jorg Muller
2023, Functional Ecology (37) 150-161
Climate, topography and the 3D structure of forests are major drivers affecting local species communities. However, little is known about how the specific functional traits of saproxylic (wood-living) beetles, involved in the recycling of wood, might be affected by those environmental characteristics.Here, we combine ecological and morphological traits available...
Testing the ShakeAlert earthquake early warning system using synthesized earthquake sequences
Maren Bose, Jennifer Andrews, Colin T O’Rourke, Deborah L. Kilb, Angela Lux, Julian Bunn, Jeffrey J. McGuire
2023, Seismological Research Letters (94) 243-259
We test the behavior of the United States (US) West Coast ShakeAlert earthquake early warning (EEW) system during temporally close earthquake pairs to understand current performance and limitations. We consider performance metrics based on source parameter and ground‐motion forecast accuracy, as well as on alerting timeliness. We generate ground‐motion times...
Variation in Prairie Chub hatch relationships across wet and dry years in the upper Red River basin
Maeghen Wedgeworth, Robert Michael Mollenhauer, Shannon K. Brewer
2023, North American Journal of Fisheries Management (43) 1246-1259
ObjectiveThe Prairie Chub Macrhybopsis australis is a poorly studied minnow species endemic to the upper Red River basin and is of both state and federal conservation interest due to uncertainty about its life history and potential listing status. The upper Red River basin...
Mars Science Laboratory CheMin data from the Glen Torridon region and the significance of lake-groundwater interactions in interpreting mineralogy and sedimentary history
Michael T. Thorpe, T. F. Bristow, E. Rampe, Nicholas Tosca, John P. Grotzinger, Kristen A. Bennett, C. N. Achilles, D. F. Blake, S. J. Chipera, G. Downs, R. T. Downs, S. M. Morrison, V. Tu, N. Castle, P. Craig, D. J. Des Marais, R. M. Hazen, D. W. Ming, R. V. Morris, A. H. Treiman, D. T. Vaniman, A. S. Yen, A. R. Vasavada, Erwin Dehouck, J. Bridges, J.O. Berger, Amy McAdam, T. Peretyazhko, K. Siebach, A. B. Bryk, V. F. Fox, Christopher M. Fedo
2023, Journal of Geophysical Research E: Planets (127)
The Glen Torridon (GT) region is positioned in terrains with strong clay mineral signatures, as inferred from orbital spectroscopy. The GT campaign confirmed orbital distinctions with in situ measurements by the Mars Science Laboratory rover, Curiosity, and the CheMin X-ray diffraction instrument with of some of the highest clay mineral...
Improved method for simulating groundwater inundation using the MODFLOW 6 Lake Transport Package
Lauren K. Mancewicz, Alex Mayer, Christian D. Langevin, Jason Gulley
2023, Groundwater (61) 421-430
Groundwater inundation due to sea level rise can affect island and coastal freshwater resources by exposing water tables to direct, continuous evaporation. Numerical simulations of groundwater inundation effects on coastal and island aquifers have been limited by an inability to simulate solute transport and variable density...
Lake trout (Salvelinus namaycush) otoliths indicate effects of climate and lake morphology on growth patterns in Arctic lakes
Eric Torvinen, Jeffrey A. Falke, Christopher D. Arp, Benjamin M. Jones, Matthew S. Whitman, Christian E. Zimmerman
2023, Ecology of Freshwater Fish (32) 166-180
Climate change is occurring rapidly in the Arctic, and an improved understanding of the response of aquatic biota and ecosystems will be important for this data-limited region. Here, we applied biochronology techniques and mixed-effects modelling to assess relationships among growth increments found on lake trout (Salvelinus namaycush) otoliths (N = 49) captured...
A novel origin for PGE reefs: A case study of the J-M Reef
Michael Jenkins, James E. Mungall, Michael L. Zientek, Gelu Costin, Zhuo-sen Yao
2023, Conference Paper, Applied Earth Science
The origin of meter scale stratiform layers of disseminated sulfides in enriched platinum group element (PGE) tenors and grades, called reef-type deposits, are the world’s most significant source of PGEs. Their origin in layered mafic intrusions remains debated, but in general, most researchers favor an orthomagmatic origin for reef-type deposits...
Structural properties of the Southern San Andreas fault zone in northern Coachella Valley from magnetotelluric imaging
Pieter-Ewald Share-MacParland, Jared R. Peacock, Steve C. Constable, Frank L. Vernon, Shunguo Wang
2023, Geophysical Journal International (232) 694-704
The Southern San Andreas fault (SSAF) poses one of the largest seismic risks in California. Yet, there is much ambiguity regarding its deeper structural properties around Coachella Valley, in large part due to the relative paucity of everyday seismicity. Here, we image a multistranded section of the SSAF using...
Fires, floods and other extreme events – How watershed processes under climate change will shape our coastlines
Jonathan A. Warrick, Amy E. East, Helen Willemien Dow
2023, Cambridge Prisms: Coastal Futures (1) E2
Ongoing sea-level rise has brought renewed focus on terrestrial sediment supply to the coast because of its strong influence on whether and how long beaches, marshes and other coastal landforms may persist into the future. Here, we summarise findings of sediment discharge from several coastal rivers, revealing...
Book review: Analytical groundwater modeling: Theory and applications using Python
Michael N. Fienen
2023, Groundwater (61) 4-5
No abstract available....
Using machine learning techniques with incomplete polarity datasets to improve earthquake focal mechanism determination
Robert Skoumal, David R. Shelly, Jeanne L. Hardebeck
2023, Seismological Research Letters (94) 294-304
Earthquake focal mechanisms are traditionally produced using P‐wave first‐motion polarities and commonly require well‐recorded seismicity. A recent approach that is less dependent on high signal‐to‐noise exploits similar waveforms to produce relative polarity measurements between earthquake pairs. Utilizing these relative polarity measurements, it is possible...
Engaging stakeholders to develop a decision support model of conservation risk and management capacity to prioritize investments in Bull Trout recovery
William R. Brignon, M. Brian Davis, Stephanie Gunkel, Jason B. Dunham, Michael H. Meeuwig, Chris S Allen, Shaun Clements
2023, North American Journal of Fisheries Management (43) 821-838
Rarely are sufficient resources available to support the full suite of management actions to promote recovery of a species across their entire distribution. Decision support models are a tool that can inform natural resource management decisions with consideration of the perspectives from a variety of stakeholders who work across large...
From data to interpretable models: Machine learning for soil moisture forecasting
Aniruddha Basak, Kevin M. Schmidt, Ole Mengshoel
2023, International Journal of Data Science and Analytics (15) 9-32
Soil moisture is critical to agricultural business, ecosystem health, and certain hydrologically driven natural disasters. Monitoring data, though, is prone to instrumental noise, wide ranging extrema, and nonstationary response to rainfall where ground conditions change. Furthermore, existing soil moisture models generally forecast poorly for time periods greater than a few...
