Comparison of δ13C analyses of individual foraminifer (Orbulina universa) shells by secondary ion mass spectrometry and gas source mass spectrometry
Jody Brae Wycech, Daniel Clay Kelly, Reinhard Kozdon, Akizumi Ishida, Kouki Kitajima, Howard J. Spero, John W. Valley
2024, Rapid Communications in Mass Spectrometry (38)
Rationale: The use of secondary ion mass spectrometry (SIMS) to perform micrometer-scale in situ carbon isotope (δ13C) analyses of shells of marine microfossils called planktic foraminifers holds promise to explore calcification and ecological processes. The potential of this technique, however, cannot be realized without comparison to traditional whole-shell δ13C values measured by...
Insights into glendonite formation from the upper Oligocene Sagavanirktok Formation, North Slope, Alaska
John W. Counts, Madeleine Vickers, Martha Stokes, Whittney Spivey, Kristina Frank Gardner, Jean Self-Trail, Jared T. Gooley, Ryan J. McAleer, Aaron M. Jubb, David W. Houseknecht, Richard O. Lease, Neil Patrick Griffis, Martin S. Vickers, Kasia Sliwinska, Hannah Gail Dooley Tompkins, Adam M. Hudson
2024, Journal of Sedimentary Research (94) 179-206
The type locality for the upper Oligocene Nuwok Member of the Sagavanirktok Formation (Carter Creek, North Slope, Alaska, USA) contains abundant occurrence of glendonite, a pseudomorph after the calcium carbonate mineral ikaite, which typically forms in the shallow subsurface of cold marine sediments....
Expansion of smallmouth bass distribution and habitat overlap with juvenile Chinook salmon in the Willamette River, Oregon
James White, Tobias Kock, Brooke E. Penaluna, Stanley V. Gregory, Joshua E. Williams, Randy Wildman
2024, River Research and Applications (40) 251-263
Smallmouth bass populations have expanded far beyond their native range and these predatory fish present a pervasive threat to native aquatic species throughout North America. In the western United States, smallmouth bass are now present in river and reservoir habitats where Pacific salmon are...
Diversification of forest management can mitigate wind damage risk and maintain biodiversity
Maria Potterf, Kyle Eyvindson, Clemens Blattert, Maria Trivino, Ryan C. Burner, Daniel Burgas, Mikko Monkkonen
2024, European Journal of Forest Research (143) 419-436
Mitigating future forest risks, safeguarding timber revenues and improving biodiversity are key considerations for current boreal forest management. Alternatives to rotation forestry likely have an important role, but how they will perform under a changing climate remains unclear. We used a boreal forest growth simulator to...
Etiology of a fish kill, Including the endangered Tidewater Goby (Eucyclogobius newberryi), in a northeastern pacific coastal lagoon
Frederick V. Feyrer, Matthew J. Young, Tamara E. C. Kraus, Elizabeth B. Stumpner, Darren Fong, Kurt D. Carpenter
2024, Estuaries and Coasts (47) 894-904
Ecological disturbances such as fish kills can negatively impact ecosystem processes in coastal lagoons. To gain an understanding of factors causing fish kills, we examined conditions associated with a summertime fish kill in a northeastern Pacific coastal lagoon (Rodeo Lagoon, CA, USA). Examination of available data...
Integrated geologic and geophysical modeling across the Bartlett Springs fault zone, northern California (USA): Implications for fault creep and regional structure
Victoria Langenheim, Robert J. McLaughlin, Benjamin L. Melosh
2024, Geosphere (20) 129-151
The rate and location at depth of fault creep are important, but difficult to characterize, parameters needed to assess seismic hazard. Here we take advantage of the magnetic properties of serpentinite, a rock type commonly associated with fault creep, to model its depth...
Organic layers preserved in ice patches: A new record of Holocene environmental change on the Beartooth Plateau, USA
Mio Alt, Kathryn Puseman, Craig Lee, Gregory T. Pederson, Joseph R. McConnell, Nathan J. Chellman, David B. McWethy
2024, The Holocene (34) 338-352
Growing season temperatures play a crucial role in controlling treeline elevation at regional to global scales. However, understanding of treeline dynamics in response to long-term changes in temperature is limited. In this study, we analyze pollen, plant macrofossils, and charcoal preserved in organic layers within a 10,400-year-old...
Global seismic networks operated by the U.S. Geological Survey
David C. Wilson, Charles R. Hutt, Lind Gee, Adam T. Ringler, Robert E. Anthony
2024, Seismological Research Letters (95) 1578-1590
The U.S. Geological Survey (USGS) Global Seismographic Network (GSN) Program operates two thirds of the GSN, a network of state‐of‐the‐art, digital seismological and geophysical sensors with digital telecommunications. This network serves as a multiuse scientific facility and a valuable resource for research, education,...
Accounting for spatiotemporal sampling variation in joint species distribution models
Joshua S. North, Erin M. Schliep, Gretchen J.A. Hansen, Holly Kundel, Christopher A. Custer, Paul McLaughlin, Tyler Wagner
2024, Journal of Applied Ecology (61) 186-201
Estimating relative abundance is critical for informing conservation and management efforts and for making inferences about the effects of environmental change on populations. Freshwater fisheries span large geographic regions, occupy diverse habitats and consist of varying species assemblages. Monitoring schemes used to sample...
Glacial vicariance and secondary contact shape demographic histories in a freshwater mussel species complex
Nathan Johnson, Andrew R. Henderson, Jess W. Jones, Caitlin Beaver, Steve A. Ahlstedt, Gerald R. Dinkins, Nathan L. Eckert, Mark J. Endries, Jeffrey T. Garner, John L. Harris, Paul D. Hartfield, Don W. Hubbs, Timothy W. Lane, Monte A. McGregor, Kendall R. Moles, Cheryl Morrison, Matthew D. Wagner, James D. Williams, Chase H. Smith
2024, Journal of Heredity (115) 72-85
Characterizing the mechanisms influencing the distribution of genetic variation in aquatic species can be difficult due to the dynamic nature of hydrological landscapes. In North America’s Central Highlands, a complex history of glacial dynamics, long-term isolation, and secondary contact have shaped genetic variation in aquatic species. Although the effects of...
An assessment of HgII to preserve carbonate system parameters in organic-rich estuarine waters
Christopher Moore, Robert H. Byrne, Kimberly Yates
2024, Limnology and Oceanography: Methods (22) 93-102
This work assesses the effectiveness of sample preservation techniques for measurements of pHT (total scale), total dissolved inorganic carbon (CT), and total alkalinity (AT) in organic-rich estuarine waters as well as the internal consistency of measurements and calculations (e.g., AT, pHT, and CT) in these waters....
U-Pb zircon ages and Lu-Hf isotope systematics across northwestern Mexico: Implications for Cretaceous to Paleocene tectonomagmatic evolution during Farallon subduction
Arlin B. Fonseca-Martinez, Alexander Iriondo, Scott E.K. Bennett, Fred W. McDowell, Carlos Ortega-Obregon
2024, International Geology Review (66) 2384-2408
This study presents U-Pb zircon ages and Lu-Hf zircon isotope data for Cretaceous-Paleocene plutonic rocks along a W-E transect in northwestern Mexico. These data are combined with tectonic reconstruction that restores Late Cenozoic extensional deformation and shows the position of magmatism at 36 Ma. Zircon U-Pb ages results span from 142...
Imperfect detection and misidentification affect inferences from data informing water operation decisions
Joseph E. Kirsch, James Peterson, Adam Duarte, Denise Goodman, Andrew Goodman, Sara Hugentobler, Mariah Meek, Russell Perry, Lori Smith, Jeffrey Stuart
2024, North American Journal of Fisheries Management (44) 335-358
ObjectiveManagers can modify river flow regimes using fish monitoring data to minimize impacts from water management infrastructure. For example, operation of the gate-controlled Delta Cross Channel (DCC) in California can negatively affect the endangered Sacramento River winter-run Chinook Salmon Oncorhynchus tshawytscha. Although guidelines have been developed for DCC...
Sediment thickness map of United States Atlantic and Gulf Coastal Plain Strata, and their influence on earthquake ground motions
Oliver S. Boyd, David Churchwell, Morgan P. Moschetti, Eric M. Thompson, Martin C. Chapman, Okan Ilhan, Thomas L. Pratt, Sean Kamran Ahdi, Sanaz Rezaeian
2024, Earthquake Spectra (40) 89-112
With the recent successful accounting of basin depth ground-motion adjustments in seismic hazard analyses for select areas of the western United States, we move toward implementing similar adjustments in the Atlantic and Gulf Coastal Plains by constructing a sediment thickness model and evaluating multiple relevant site amplification...
Quantifying the contributions of tributaries to large-river fish populations through mark-recapture modeling
Brian D. Healy, Emily C. Omana Smith
2024, North American Journal of Fisheries Management (44) 299-318
Tributaries may play a vital role in maintaining populations of large river fishes, although the specific contributions of tributaries toward recruitment of river-wide populations are not often understood. Tributaries may experience fewer cumulative anthropogenic impacts relative to mainstem rivers and may offer more natural...
Landscape configuration alters movement behavior and space-use of a Hawaiian forest bird community
Kristina L. Paxton, Jennifer R Smetzer, Patrick J. Hart, Marti J Anderson, Eben H. Paxton
2024, Journal of Avian Biology (2024)
Habitat loss and fragmentation are considered the greatest threats to ecosystems worldwide. Movement reveals how individuals meet their habitat requirements and respond to environmental heterogeneity, and thus can provide a powerful tool for investigating how animals respond to changes in landscape configuration. In our study,...
Arizona Groundwater Explorer: Interactive maps for evaluating the historical and current groundwater conditions in wells in Arizona, USA
Fred D. Tillman, Marilyn E. Flynn
2024, Hydrogeology Journal (32) 645-661
Groundwater is an important water source in Arizona, accounting for about 41% of water use in this mostly arid-to-semiarid state in the southwestern United States, and the availability of groundwater resources in the state is a concern. To provide accessible information from depth-to-groundwater data, a series of web-based interactive maps...
Divergent community trajectories with climate change across a fine-scale gradient in snow depth
Meagan Ford Oldfather, Sarah C. Elmendorf, Elisa Van Cleemput, Jonathan J. Henn, Jared D. Huxley, Caitlin T. White, Hope C. Humphries, Marko J. Spasojevic, Katharine N. Suding, Nancy C. Emery
2024, Journal of Ecology (112) 126-137
Fine-scale microclimate variation due to complex topography can shape both current vegetation distributional patterns and how vegetation responds to changing climate. Topographic heterogeneity in mountains is hypothesized to mediate responses to regional climate change at the scale of metres. For alpine vegetation especially,...
Understanding marsh elevation and accretion processes and vulnerability to rising sea levels across climatic and geomorphic gradients in California, USA
Karen M. Thorne, McKenna Leigh Bristow, Lyndsay L. Rankin, Katya E. Kovalenko, Justine Annaliese Neville, Chase M. Freeman, Glenn R. Guntenspergen
2024, Estuaries and Coasts (47) 1972-1992
Tidal marshes build elevations by below- and aboveground organic and mineral soil processes. Marsh elevation and accretion data can be used to determine if marshes are keeping pace with sea-level rise. Using a network of 54 deep rod surface elevation tables with paired feldspar marker horizon...
Spatial asynchrony and cross-scale climate interactions in populations of a coldwater stream fish
George Valentine, Xinyi Lu, Evan S. Childress, C. Andrew Dolloff, Nathaniel P. Hitt, Matthew Kulp, Benjamin Letcher, Kasey C. Pregler, Jacob Rash, Mevin B. Hooten, Yoichiro Kanno
2024, Global Change Biology (30)
Climate change affects populations over broad geographic ranges due to spatially autocorrelated abiotic conditions known as the Moran effect. However, populations do not always respond to broad-scale environmental changes synchronously across a landscape. We combined multiple datasets for a retrospective analysis of time-series count data (5–28 annual samples per segment)...
Cisco population characteristics in Wisconsin lakes in relation to lake- and landscape-level factors
Daniel J. Dembkowski, Jeremiah S. Shrovnal, Timothy P. Parks, Greg G. Sass, John Lyons, Daniel A. Isermann
2024, Transactions of the American Fisheries Society (153) 93-111
ObjectiveDeclines in Cisco Coregonus artedi populations in some inland lakes have prompted assessments of Cisco occurrence and extirpation risk in relation to various stressors to identify refuge lakes and factors that promote Cisco persistence. However, most previous assessments have focused on presence–absence of Cisco rather than examining how population...
Grizzly bear responses to restrictions of recreation in Yellowstone National Park
Elise Loggers, Andrea R. Litt, Frank T. van Manen, Mark A. Haroldson, Kerry A. Gunther
2024, Journal of Wildlife Management (88)
Avoiding humans will be more difficult and energetically costly for animals as outdoor recreation increases and people venture farther into wildland areas that provide high-quality habitat for wildlife. Restricting human access can be an attractive management tool to mitigate effects of human recreation activities on wildlife; however, the efficacy of...
Coyotes in the Great Basin desert do not exhibit a spatial response following the removal of anthropogenic water sources
Nadine Pershyn, Eric Gese, Erica Francis Stuber, Brian Kluever
2024, Journal of Arid Environments (220)
Coyote (Canis latrans) range expansion into desert ecosystems has highlighted the role of anthropogenic water sources in arid ecosystems. Despite hypotheses that additional water facilitated this expansion, previous studies reported that coyotes did not exhibit a spatial or dietary...
Toxicity of wildland fire retardants to rainbow trout in short exposures
Holly J. Puglis, Michael G. Iacchetta
2024, Environmental Toxicology and Chemistry (43) 398-404
Long-term wildland fire retardants are one important tool used to control and suppress wildfires. During suppression activities, these retardants may enter waterbodies; thus, there is a need to understand their potential effects to aquatic biota. We investigated...
Crustal block-controlled contrasts in deformation, uplift, and exhumation in the Santa Cruz Mountains, California, USA, imaged through apatite (U-Th)/He thermochronology and 3-D geological modeling
Curtis William Baden, David L. Shuster, Jeremy H. Hourigan, Jared T. Gooley, Melanie Cahill, George E. Hilley
2024, Geological Society of America Bulletin (136) 2789-2814
Deformation along strike-slip plate margins often accumulates within structurally partitioned and rheologically heterogeneous crustal blocks within the plate boundary. In these cases, contrasts in the physical properties and state of juxtaposed crustal blocks may play an important role in accommodation of deformation. Near...
