Evaluating effectiveness of flocculation and wave-reduction barriers for restoration of a turbid, terminal lake
Cassandra Smith, Randy Joe Brannan
2025, Wetlands Ecology and Management (33)
Malheur Lake is a freshwater, shallow lake that provides key habitat for birds along the Pacific Flyway in North America. The lake shifted to a turbid state in the 1990s with suspended-sediment concentrations sometimes exceeding 1000 mg/L and minimal light available in the water column for submerged aquatic vegetation. Resource...
Harmless tags or hazardous ads? Investigating the potential for ear tags to increase predation on neonatal ungulates
Matthew T. Turnley, W. Sue Fairbanks, Robert Charles Lonsinger, Michael J. Cherry, Marlin M. Dart, Randy W. DeYoung, Derek P. Hahn, Levi J. Heffelfinger, Celine M.J. Rickels, Evan P. Tanner, H. George Wang, M. Colter Chitwood
2025, Canadian Journal of Zoology (82) 1-8
Studies involving individually marked animals provide insights predicated on the assumption marked individuals are accurate models of their unmarked counterparts. Taxa-specific and marker-specific examinations are needed to determine if marked animals are suitable models for the parameter(s) being measured. Our objective was to determine if brightly colored ear tags influenced...
Network of networks: Time series clustering of AmeriFlux sites
David E. Reed, Housen Chu, Brad G. Peter, Jiquan Chen, Michael Abraha, Brian Amiro, Ray G. Anderson, M. Altaf Arain, Paulo Arruda, Greg A. Barron-Gafford, Carl Bernacchi, Daniel P. Beverly, Sebastien C. Biraud, T. Andrew Black, Peter D. Blanken, Gil Bohrer, Rebecca Bowler, David R. Bowling, M. Syndonia Bret-Harte, Mario Bretfeld, Nathaniel A. Brunsell, Stephen H. Bullock, Gerardo Celis, Xingyuan Chen, Aimee T. Classen, David R. Cook, Alejandro Cueva, Higo J. Dalmagro, Kenneth J. Davis, Ankur Desai, Alison J. Duff, Allison L. Dunn, David Durden, Colin W. Edgar, Eugenie Euskirchen, Rosvel Bracho, Brent E. Ewers, Lawrence B. Flanagan, Christopher R. Florian, Vanessa Foord, Inke Forbrich, Brandon R. Forsythe, John Frank, Jaime Garatuza-Payan, Sarah Goslee, Christopher M. Gough, Mark B. Green, Timothy Griffis, Manuel Helbig, Andrew C. Hill, Ross Hinkle, Jason Horne, Elyn Humphreys, Hiroki Ikawa, Go Iwahana, Rachhpal Jassal, Bruce K. Johnson, Mark Johnson, Steven A. Kannenberg, Eric Kelsey, John King, John F. Knowles, Sara Knox, Hideki Kobayashi, Thomas Kolb, Randy Kolka, Ken Krauss, Lars Kutzbach, Brian T. Lamb, Beverly E. Law, Sung-Ching Lee, Xuhui Lee, Heping Liu, Henry W. Loescher, Sparkle L. Malone, Roser Matamala, Marguerite Mauritz, Stefan Metzger, Gesa Meyer, Bhaskar Mitra, J. William Munger, Zoran Nesic, Asko Noormets, Thomas L. O'Halloran, Patrick T. O'Keeffe, Steven F. Oberbauer, Walter Oechel, Patty Oikawa, Paulo C. Olivas, Andrew Ouimette, Gilberto Pastorello, Jorge F. Perez-Quezada, Claire Phillips, Gabriela Posse, Bo Qu, William L. Quinton, Michele L. Reba, Andrew D. Richardson, Valentin Picasso, Adrian V. Rocha, Julio C. Rodriguez, Roel Ruzol, Scott Saleska, Russell L. Scott, Adam P. Schreiner-McGraw, Edward A.G. Schuur, Maria Silveira, Oliver Sonnentag, David L. Spittlehouse, Ralf Staebler, Gregory Starr, Christina Staudhammer, Chris Still, Cove Sturtevant, Ryan C. Sullivan, Andy Suyker, David Trejo, Masahito Ueyama, Rodrigo Vargas, Brian Viner, Enrique R. Vivoni, Dong Wang, Eric J. Ward, Susanne Wiesner, Lisamarie Windham-Myers, David Yannick, Enrico A. Yepez, Terenzio Zenone, Junbin Zhao, Donatella Zona
2025, Agricultural and Forest Meteorology (372)
Environmental observation networks, such as AmeriFlux, are foundational for monitoring ecosystem response to climate change, management practices, and natural disturbances; however, their effectiveness depends on their representativeness for the regions or continents. We proposed an empirical, time series approach to quantify the similarity of ecosystem fluxes across AmeriFlux sites. We...
Predator-induced injury of a neonatal pronghorn cues abandonment of current reproductive investment
Marlin M. Dart, Matthew T. Turnley, Celine M.J. Rickels, Evan P. Tanner, M. Colter Chitwood, Randy W. DeYoung, W. Sue Fairbanks, Derek P. Hahn, Levi J. Heffelfinger, Robert Charles Lonsinger, H. George Wang, Michael J. Cherry
2025, Ecology (106)
Evolutionary theory predicts that parental care is favored when the fitness benefits outweigh the costs of providing care (Klug et al., 2012). In mammals, parental care is generally provided by females, who provide nourishment through lactation, protection from predators, aid in juvenile movement, or otherwise facilitate offspring survival (Balshine, 2012; Lent, 1974). However,...
Inferring snowpack contributions and the mean elevation of source water to streamflow in the Willamette River, Oregon using water stable isotopes
J. Renee Brooks, Henry M. Johnson, Keira R. Johnson, Steven P. Cline, Randy Comeleo, WIlliam Rugh, Lisandra Trine
2025, Hydrological Processes (39)
Snowpacks are an important water source for mountainous rivers, worldwide. The timing and volume of streamflow in systems reliant on snowmelt can be affected by changes in snow accumulation and melt time. In the Cascade Range (western USA), seasonal snowpacks are predicted to decrease by over 50% within the next...
Relative abundance, seasonal occurrence, and distribution of marine birds in the northern Gulf of Mexico
J. Christopher Haney, Pamela E. Michael, Jeffery S. Gleason, Randy Wilson, Yvan G. Satgé, Kathy M. Hixson, Patrick G.R. Jodice
2025, Marine Ornithology: Journal of Seabird Research and Conservation (53) 189-206
Marine birds in the U.S. Gulf of Mexico have long been poorly studied. Given statutory obligations to protect migratory birds and endangered species, three broad-scale vessel and aerial programs initiated since 2010 have now surveyed the entire northern Gulf. Vessel coverage alone exceeds 700 d and 74,000 km of observer...
Tapwater exposures, residential risk, and mitigation in a PFAS-impacted-groundwater community
Paul M. Bradley, Kristin M. Romanok, Kelly Smalling, Lee Donahue, Mark P. Gaikowski, Randy K. Hines, Sara E. Breitmeyer, Stephanie E. Gordon, Keith A. Loftin, R. Blaine McCleskey, Shannon M. Meppelink, Molly L. Schreiner
2025, Environmental Science: Processes and Impacts
Tapwater (TW) safety and sustainability are priorities in the United States. Per/polyfluoroalkyl substance(s) (PFAS) contamination is a growing public-health concern due to prolific use, widespread TW exposures, and mounting human-health concerns. Historically-rural, actively-urbanizing communities that rely on surficial-aquifer private wells incur elevated risks of unrecognized TW exposures, including PFAS, due...
Salinas Valley integrated hydrologic and reservoir operations models, Monterey and San Luis Obispo Counties, California
Wesley R. Henson, Randy Hanson, Scott E. Boyce, Joseph A. Hevesi, Elizabeth Rae Jachens
2025, Preprint
The area surrounding the Salinas Valley groundwater basin in Monterey and San Luis Obispo Counties of California is a highly productive agricultural area, contributes significantly to the local economy, and provides a substantial portion of vegetables and other agricultural commodities to the Nation. This region of California provides about half...
Increased heterozygosity and body condition result from admixed translocation of the threatened Mogollon Narrow-headed Gartersnake (Thamnophis rufipunctatus)
Dustin A. Wood, Bruce L. Christman, Randy D. Jennings, Jonathan P. Rose, Erika M. Nowak, Justin Schofer, Amy G. Vandergast
2025, Conservation Genetics (26) 403-418
Enhancing gene flow through translocations can be a useful tool in recovering small and isolated populations. However, it is not devoid of genetic risks, such as outbreeding depression in future generations, that can have negative consequences in terms of the establishment and mean fitness of the population. Studies that monitor...
Maintenance of genetic diversity despite population fluctuations in the lesser prairie-chicken (Tympanuchus pallidicinctus)
Andrew J. Lawrence, Scott A. Carleton, Sara J. Oyler-McCance, Randy W. DeYoung, Clay T. Nichols, Timothy F. Wright
2025, Ecology and Evolution (15)
Assessments of genetic diversity, structure, history, and effective population size (N e) are critical for the conservation of imperiled populations. The lesser prairie-chicken (Tympanuchus pallidicinctus) has experienced declines due to habitat loss, degradation, and fragmentation in addition to substantial population fluctuations with unknown effects on genetic diversity. Our objectives were to:...
Gulf of Mexico Marine Assessment Program for Protected Species (GOMMAPPS): Seabird surveys in the northern Gulf of Mexico, 2017-2020
Jeffrey S. Gleason, Allison Sussman, Kayla L. Davis, J. Christopher Haney, Kathy M. Hixson, Patrick G.R. Jodice, James E. Lyons, Pamela E. Michael, Yvan G. Satgé, Emily D. Silverman, Elise F. Zipkin, R. Randy Wilson
2025, OCS Study BOEM 2025-026
No abstract available....
Archive of morphological data for the Coregonus artedi species complex of the Great Lakes, Lake Nipigon and Great Slave Lake
Randy L. Eshenroder, Jonah Pollens-Dempsey, Thomas C. Pratt, Nicholas E. Mandrak, Thomas N. Todd, Timothy P. O’Brien, Scott M. Reid, Chris M. Olds, Whitney M. Woelmer, Yu-Chun Kao, Daniel L. Yule, Brian O’Malley, Paul Vecsei, Chippewas of Nawash Unceded First Nation, Little Traverse Bay Bands of Odawa Indians, Little River Band of Ottawa Indians, Andrew M. Muir
2025, Laurentian
This publication is a user guide for an archive of morphological data recorded by various authors from North American ciscoes of the Coregonus artedi species complex (subfamily Coregoninae). The archive is accessible from the Great Lakes Fishery Commission’s (GLFC) server, is open access, and contains data for the Laurentian Great Lakes; Lake Nipigon,...
Strontium isotopes reveal diverse life history variations, migration patterns, and habitat use for Broad Whitefish (Coregonus nasus) in Arctic, Alaska
Jason C. Leppi, Daniel J. Rinella, Mark S. Wipfli, Randy J. Brown, Karen J. Spaleta, Matthew S. Whitman
2025, PLoS ONE (17)
Conservation of Arctic fish species is challenging partly due to our limited ability to track fish through time and space, which constrains our understanding of life history diversity and lifelong habitat use. Broad Whitefish (Coregonus nasus) is an important subsistence species for Alaska’s Arctic Indigenous communities, yet little is known...
Historical and morphological evidence for a remnant population of Lake Erie cisco Coregonus artedi (albus) in Crystal Lake, Pennsylvania
Joseph Schmitt, Douglas P. Fischer, Yu-Chun Kao, Aaron Frey, Marc Chalupnicki, James E. McKenna Jr., Kristy Phillips, Mark Richard Dufour, Richard Kraus, Randy L. Eshenroder
2024, Journal of Great Lakes Research (50)
The cisco (Coregonus artedi) population in Crystal Lake, Pennsylvania, is of great scientific interest as it either originated from Lake Erie or Lake Ontario. Cisco in Lake Erie once supported the largest freshwater fishery in the world, but populations were extirpated by 1960. We conducted a morphological analysis of Crystal...
Range-wide population genomic structure of the Karner blue butterfly, Plebejus (Lycaeides) samuelis
Jing Zhang, Aaron Aunins, Timothy L. King, Qian Cong, Jinhui Shen, Leina Song, Gregor W. Schuurman, Randy Knutson, Ralph Grundel, Jessica Hellmann, Nick V. Grishin
2024, Ecology and Evolution (14)
The Karner blue butterfly, Plebejus (Lycaeides) samuelis, is an endangered North American climate change-vulnerable species that has undergone substantial historical habitat loss and population decline. To better understand the species' genetic status and support Karner blue conservation, we sampled 116 individuals from 22 localities across the species'...
Estimation of reservoir storage capacity and geomorphic change detection analysis from a multibeam bathymetric survey of Randy Poynter Lake, Rockdale County, Georgia
A.R. Whaling, W.J. Bolton
2024, Scientific Investigations Map 3523
Rockdale County Department of Water Resources has a directive to update estimates of the reservoir storage capacity of Randy Poynter Lake, located in northern Georgia, and to assess recent sedimentation and associated storage capacity loss. In 2022, the U.S. Geological Survey completed a multibeam bathymetric survey of Randy Poynter Lake...
Toward a set of essential biodiversity variables for assessing change in mountains globally
Dirk Schmeller, James Thornton, Davnah Urbach, Jake Alexander, Walter Jetz, Aino Kulonen, Robert Mills, Claudia Notornicola, Elisa Pallazi, Harald Pauli, Christophe Randin, Sergey Rosbakh, Roger Sayre, Nasrin Tehrani, William Verbiest, Tom Walker, Sonja Wipf, Carolina Adler
2024, BioScience (74) 539-551
Mountain regions harbor unique and rich biodiversity, forming an important part of our global life support system. This rich biodiversity underpins the ecological intactness and functioning of mountain ecosystems, which are imperative for the provision of key ecosystem services. A considerable amount of data are required to assess ecological intactness...
A fine-scale examination of parturition timing in temperate ungulates
Matthew T. Turnley, Tabitha A. Hughes, Randy T. Larsen, Kent R. Hersey, Matthew S. Broadway, M. Colter Chitwood, W. Sue Fairbanks, Robert Charles Lonsinger, Brock R. McMillan
2024, Functional Ecology (14)
Parturition timing has long been a topic of interest in ungulate research. However, few studies have examined parturition timing at fine scale (e.g., <1 day). Predator activity and environmental conditions can vary considerably with diel timing, which may result in selective pressure for parturition to occur...
Dryland soil recovery after disturbance across soil and climate gradients of the Colorado Plateau
Kathryn Delores Eckhoff, Sasha C. Reed, John B. Bradford, Nikita C. Daly, Keven Griffen, Robin H. Reibold, Randi Lupardus, Seth M. Munson, Aarin Sengsirirak, Miguel L. Villarreal, Michael C. Duniway
2024, Science of the Total Environment (932)
Drylands impacted by energy development often require costly reclamation activities to reconstruct damaged soils and vegetation, yet little is known about the effectiveness of reclamation practices in promoting recovery of soil quality due to a lack of long-term and cross-site studies. Here, we examined...
Survival, cause-specific mortality, and population growth of white-tailed deer in western Virginia
Garrett B. Clevinger, W. Mark Ford, Marcella J. Kelly, Robert S. Alonso, Randy W. DeYoung, Nelson W. Lafon, Michael J. Cherry
2024, Journal of Wildlife Management (88)
Understanding the role of recruitment in population dynamics of white-tailed deer (Odocoileus virginianus) is important for management. In the central Appalachian Mountains, deer are part of a largely forested ecosystem that supports 3 carnivore species thought to be capable of influencing white-tailed deer recruitment: black bears (Urus americanus), coyotes (Canis...
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...
Occurrence of mixed organic and inorganic chemicals in groundwater and tapwater, town of Campbell, Wisconsin, 2021–22
Kristin M. Romanok, Shannon M. Meppelink, Paul M. Bradley, Sara E. Breitmeyer, Lee Donahue, Mark P. Gaikowski, Randy K. Hines, Kelly L. Smalling
2023, Open-File Report 2023-1088
In response to previous reports of per- and polyfluoroalkyl substances (PFAS) contamination in French Island’s (located in the Mississippi River within the town of Campbell, Wisconsin) primary source of drinking water, 11 locations were sampled by the U.S. Geological Survey (USGS) in October 2021 to assess the potential presence of...
Oil and gas reclamation—Operations, monitoring methods, and standards
Randi C. Lupardus, Janna Simonsen, Gordon Toevs, Barbara Sterling, Zachary H. Bowen, Zoe Davidson, Steve E. Hanser, Emily Kachergis, Alexander Laurence-Traynor, Nika Lepak, Rebecca K. Mann, Aleta Nafus, David S. Pilliod, Michael C. Duniway
2023, Techniques and Methods 18-A1
This publication provides broad guidance for surface management of oil and gas development with a focus on promoting successful reclamation. Successful reclamation depends on sound best management practices, clear standards and expectations, defensible monitoring for effectiveness, and management of production facilities to minimize surface disturbance. This publication provides specific guidelines...
Blue snowflakes in a warming world: Karner blue butterfly climate change vulnerability synthesis and best practices for adaptation
Gregor W. Schuurman, Christopher L. Hoving, Anna N. Hess, Lainey V. Bristow, Philip J. Delphey, Jessica J. Hellmann, Heather L. Keough, Randy L. Knutson, Annie Kellner
2023, Natural Resource Report NPS/NRSS/CCRP/NRR—2023/2602
This report—developed at the request of the United States Fish and Wildlife Service-led Karner Blue Butterfly Recovery Team by Recovery Team members and partners—provides a Karner blue butterfly climate change vulnerability synthesis, explores a range of potential responses, and presents best practices for climate change-informed conservation of the species.The three...
Cruise Report for NOAA Ship Nancy Foster Cruise NF-22-06
Randy Clark, Amanda Demopoulos
2023, DWH MDBC Cruise Report CR-23-03
Between 9 August and 1 September, 2022, the Mesophotic and Deep Benthic (MDBC) Habitat Assessment and Evaluation (HAE) and Mapping, Ground-truthing, and Predictive Habitat Modeling (MGM) projects implemented remotely operated vehicle (ROV) dives, multibeam surveys, and conductivity, temperature, depth (CTD) operations at deep-sea sites in the northern Gulf of Mexico....
