Colored shaded-relief bathymetry, acoustic backscatter, and selected perspective views of the northern part of the California Continental Borderland, southern California
Peter Dartnell, Emily C. Roland, Nicole A. Raineault, Christopher M. Castillo, James E. Conrad, Renato Kane, Daniel S. Brothers, Jared W. Kluesner, Maureen A. L. Walton
2021, Scientific Investigations Map 3473
The California Continental Borderland is the complex continental margin in southern California that extends from Point Conception southward into northern Baja California (Fisher and others, 2009). This colored shaded-relief bathymetry map of the northern continental borderland in southern California was generated primarily from multibeam-echosounder data collected by the University of...
Why study geysers?
Shaul Hurwitz, Michael Manga, Kathleen Campbell, Carolina Munoz-Saez, Eva Eibl
2021, Eos, American Geophysical Union (102)
Scientific research for more than two centuries has improved our understanding of Earth’s geysers. This knowledge provides insights into volcanic processes, the origin and environmental limits of life on Earth and potentially Mars, and on geysers on icy outer solar system satellites. Continued scientific research will help us understand and...
Multiple climate change-driven tipping points for coastal systems
Patrick L. Barnard, Jenifer Dugan, Henry M. Page, Nathan J. Wood, Juliette A. Finzi Hart, Daniel Cayan, Li H. Erikson, David A. Hubbard, Monique Myers, John M. Melack, Samuel F. Iacobellis
2021, Nature--Scientific Reports (11)
As the climate evolves over the next century, the interaction of accelerating sea level rise (SLR) and storms, combined with confining development and infrastructure, will place greater stresses on physical, ecological, and human systems along the ocean-land margin. Many of these valued coastal systems could reach...
Ontogenetic trait shifts: Seedlings display high trait variability during early stages of development
Caroline Ann Havrilla, Seth M. Munson, Charles B. Yackulic, Bradley J. Butterfield
2021, Functional Ecology (35) 2409-2423
Characterizing variation in plant functional traits is often key to understanding community-level processes and predicting ecosystem responses to environmental change. Trait-based ecology has focused on interspecific trait variation, but sources and consequences of within-species ontogenetic trait variation, particularly during early stages of development, remain understudied.Using a manipulative greenhouse experiment,...
Approach for quantifying rare Earth elements at low keV
Heather A. Lowers
2021, Microscopy and Microanalysis (27) 1864-1866
The challenges of analyzing bastnaesite (REECO3F) and hydroxylbastnaesite (REECO3OH) include beam sensitivity, quantification of light elements in a heavy element matrix, the presence of elements that cannot be analyzed with EPMA (H), and the use of x-ray lines whose physical constants are not well known. To overcome some of these...
A seasonally dynamic model of light at the stream surface
Philip Savoy, Emily. S Bernhardt, Lily Kirk, Matthew J. Cohen, James B. Heffernan
2021, Freshwater Science (40) 286-301
Light is a primary constraint on primary production and drives many ecological processes in stream ecosystems, yet light regimes have received considerably less attention than other factors of the stream environment, such as hydrology or nutrient cycling. Light received by streams can be highly heterogeneous in both...
Storm-scale and seasonal dynamics of carbon export from a nested subarctic watershed underlain by permafrost
Joshua C. Koch, Mark Dornblaser, Rob Striegl
2021, Journal of Geophysical Research Biogeosciences (126)
Subarctic catchments underlain by permafrost sequester a major stock of frozen organic carbon (C), which may be mobilized as the Arctic warms. Warming can impact C export from thawing soils by altering the depth and timing of runoff related to changing storm and fire regimes and altered soil thaw depths....
Post-release survival of California brown pelicans (Pelecanus Occidentalis Californicus) following oiling and rehabilitation after the Refugio oil spill
C. V. Fiorello, Patrick G.R. Jodice, J. S. Lamb, Y. G. Satgé, K. Mills, M. Ziccardi
2021, Journal of Wildlife Diseases (57) 590-600
Oil spills represent a continued threat to marine wildlife. Although the public expects, and the State of California, US requires, oiled animals to be rescued for rehabilitation and release, scientists have questioned the welfare and conservation value of capture and rehabilitation of oiled wildlife, based on poor postrelease survival documented...
Steppe eagle Aquila nipalensis
Michael J. McGrady, Evgeny A. Bragin, Igor Karyakin, Nyambaya Batbayar, Todd E. Katzner
2021, Book chapter, Migration strategies of birds of prey in sestern Palearctic
The steppe eagle (Aquila nipalensis) is a globally endangered, full migrant raptor that breeds in the southern temperate zone from European Russia in the west to eastern Mongolia, Dauria and adjacent north-eastern China in the east. It winters in Africa, the Middle East and Southern and South-Eastern Asia, and migrations...
Diplotriaena obtusa (Nematoda: Diplotriaenidae) from barn swallows (Hirundo rustica) and cliff swallows (Petrochelidon pyrrhonota) collected during mortality events in the Upper Midwest, USA
Michelle Michalski, Emily Kadolph, Constance Roderick, Julia S. Lankton, Rebecca A. Cole
2021, Journal of Parasitology (107) 593-599
Several mortality events involving barn swallows (Hirundo rustica) and cliff swallows (Petrochelidon pyrrhonota) were reported in the Upper Midwestern states in 2017 and 2018. Barn swallow mortality followed unseasonal cold snaps, with the primary cause of death being emaciation with concurrent air sac nematodiasis. Lesions in cliff swallows were consistent...
Using the DRCOG 2018 pilot land use land cover data to predict urban air temperature in the Denver metro area
Peter Christian Ibsen
2021, Newsletter
No abstract available....
FLUXNET-CH4: A global, multi-ecosystem database and analysis of methane seasonality from freshwater wetlands
Kyle B. Delwiche, Sarah Knox, Avni Malhotra, Etienne Fluet-Chouinard, Gavin McNicol, Sarah Feron, Zutao Ouyang, Dario Papale, Carlo Trotta, Eleonora Canfora, You-Wei Cheah, Danielle Christianson, Ma. Carmelita R. Alberto, Pavel Alekseychik, Mika Aurela, Dennis Baldocchi, Sheel Bansal, David P. Billesbach, Gil Bohrer, Rosvel Bracho, Nina Buchmann, David I. Campbell, Gerardo Celis, Weinan Chen, Jiquan Chen, Housen Chu, Higo J Dalmagro, Sigrid Dengel, Ankur R. Desai, Matteo Detto, Han Dolman, Elke Eichelmann, Eugenie S. Euskirchen, Daniela Famulari, Kathrin Fuchs, Mathias Goeckede, Sébastien Gogo, Mangaliso J Gondwe, Jordan P. Goodrich, Pia Gottschalk, Scott L. Graham, Martin Heimann, Manuel Helbig, Carole Helfter, Kyle S. Hemes, Takashi Hirano, David Hollinger, Lukas Hortnagl, Hiroki Iwata, Adrien Jacotot, Joachim Jansen, Gerald Jurasinski, Minseok Kang, Kuno Kasak, John King, Janina Klatt, Franziska Koebsch, Ken Krauss, Derrick Y.F. Lai, Annalea Lohila, Ivan Mammarella, Luca B Marchesini, Giovanni Manca, Jaclyn H Matthes, Trofim Maximov, Lutz Merbold, Bhaskar Mitra, Timothy H. Morin, Eiko Nemitz, Mats B. Nilsson, Shuli Niu, Walter C. Oechel, Patricia Y. Oikawa, Keisuke Ono, Matthias Peichl, Olli Peltola, Michele L. Reba, Andrew D. Richardson, William Riley, Benjamin RK Runkle, Youngryel Ryu, Torsten Sachs, Ayaka Sakabe, Camilo Rey Sanchez, Edward A. Schuur, Karina VR Schafer, Oliver Sonnentag, Jed P. Sparks, Ellen Stuart-Haëntjens, Cove Sturtevant, Ryan C. Sullivan, Daphne J. Szutu, Jonathan E Thom, Margaret S. Torn, Eeva-Stiina Tuittila, Jessica Turner, Masahito Ueyama, Alex C. Valach, Rodrigo Vargas, Andrej Varlagin, Alma Vazquez-Lule, Joseph G. Verfaillie, Timo Vesala, George L Vourlitis, Eric Ward, Christian Wille, Georg Wohlfahrt, Guan Xhuan Wong, Zhen Zhang, Donatella Zona, Lisamarie Windham-Myers, Benjamin Poulter, Robert B. Jackson
2021, Earth System Science Data (13) 3607-3689
Methane (CH4) emissions from natural landscapes constitute roughly half of global CH4 contributions to the atmosphere, yet large uncertainties remain in the absolute magnitude and the seasonality of emission quantities and drivers. Eddy covariance (EC) measurements of CH4 flux are ideal for constraining ecosystem-scale CH4 emissions due to quasi-continuous...
Highly pathogenic avian influenza virus H5N2 (Clade 2.3.4.4) challenge of mallards age appropriate to the 2015 midwestern poultry outbreak
Jeffrey S. Hall, Daniel A. Grear, Scott Krauss, Patrick Seiler, Robert J. Dusek, Sean Nashold, Robert G. Webster
2021, Influenza and Other Respiratory Viruses (15) 767-777
BackgroundThe 2015 highly pathogenic avian influenza virus (HPAIV) H5N2 clade 2.3.4.4 outbreak in upper midwestern U.S. poultry operations was not detected in wild birds to any great degree during the outbreak, despite wild waterfowl being implicated in the introduction, reassortment, and movement of the virus into North...
Past abrupt changes, tipping points and cascading impacts in the Earth system
V. Brovkin, Edward J. Brook, J. Williams, S. Bathiany, T. Lenton, M. Barton, R. DeConto, J. Donges, A. Ganopolski, J. McManus, Summer K. Praetorius, A. de Vernal, A. Abe-Ouchi, H. Cheng, M Claussen, M. Crucifix, Virginia Iglesias, Darrell S. Kaufman, T. Kleinen, Fabrice Lambert, Sander van der Leeuw, Hannah Liddy, Marie-France Loutre, David McGee, Kira Rehfeld, Rachael H. Rhodes, Alistair W.R. Seddon, Lilian Vanderveken, Zicheng Yu
2021, Nature Geoscience (14) 550-558
The geological record shows that abrupt changes in the Earth system can occur on timescales short enough to challenge the capacity of human societies to adapt to environmental pressures. In many cases, abrupt changes arise from slow changes in one component of the Earth system that...
Eastern Imperial Eagle Aquila heliaca
Evgeny Bragin, Marton Horvath, Sharon A. Poessel, Todd E. Katzner
2021, Book chapter, Migration strategies of birds of prey in sestern Palearctic
Eastern imperial eagles are a short-, medium-distance, partially-migratory, or even non-migratory, raptor that breeds at the forest-steppe interface in Eurasia and winters in Northern Africa, the Middle East or South Asia. Migratory strategies of imperial eagles are diverse. Eagles breeding in Central and Southeast Europe and south of the Black...
Late Holocene slip rate of the Mojave section of the San Andreas Fault near Palmdale, California
Elaine Young, Eric Cowgill, Katherine M. Scharer, Emery Anderson-Merritt, Amanda Keen-Zebert, Ray J. Weldon
2021, Bulletin of the Seismological Society of America (111) 3204-3225
The geologic slip rate on the Mojave section of the San Andreas fault is poorly constrained, despite its importance for understanding earthquake hazard, apparent discrepancies between geologic and geodetic slip rates along this fault section, and long‐term fault interactions in southern California. Here, we...
Adult sockeye salmon responses to transplanting upstream of an impassable dam
Tobias J. Kock, Scott D. Evans, Brian P. Saluskin, Andrew P. Matala, Richard Visser, Mark.V. Johnston, Peter F. Galbreath, Adam C. Pope
2021, North American Journal of Fisheries Management (41) 1640-1651
The Yakama Nation manages a program for reintroducing Sockeye Salmon Oncorhynchus nerka upstream of Cle Elum Dam in the Yakima River basin. The program involves transplanting of a mix of adult Sockeye Salmon from two middle Columbia River donor stocks,...
Pervasive changes in stream intermittency across the United States
Samuel Zipper, John C. Hammond, Margaret Shanafield, Margaret Zimmer, Thibault Datry, C. Nathan Jones, Kendra E. Kaiser, Sarah E. Godsey, Ryan Burrow, Joanna Blaszczak, Michelle Busch, Adam N. Price, Kate Boersma, Adam Ward, Katie Costigan, George H. Allen, Corey Krabbenhoft, Walter Dodds, Meryl C. Mims, Julian Olden, Stephanie K. Kampf, Amy J. Burgin, Daniel C. Allen
2021, Environmental Research Letters (16)
Non-perennial streams are widespread, critical to ecosystems and society, and the subject of ongoing policy debate. Prior large-scale research on stream intermittency has been based on long-term averages, generally using annually aggregated data to characterize a highly variable process. As a result, it is not well understood...
Stratigraphic cross sections of the Mowry Shale and associated strata in the Wind River Basin, Wyoming
Thomas M. Finn
2021, Scientific Investigations Map 3476
The Wind River Basin in Wyoming is one of many structural and sedimentary basins that formed in the Rocky Mountain foreland during the Laramide orogeny in the latest Cretaceous through the early Eocene. The basin (bounded by the Washakie, Owl Creek, and Bighorn uplifts on the north, the Casper arch...
The Everglades vulnerability analysis—Integrating ecological models and addressing uncertainty
Laura E. D’Acunto, Stephanie S. Romanach, Saira M. Haider, Caitlin E. Hackett, Jennifer H. Nestler, Dilip Shinde, Leonard G. Pearlstine
2021, Fact Sheet 2021-3033
The Everglades vulnerability analysis (EVA) is a project led by the U.S. Geological Survey in cooperation with the National Park Service and U.S. Army Corps of Engineers to accomplish one of the science goals of Restoration Coordination & Verification (RECOVER), a multiagency group responsible for providing scientific and technical...
Quality of groundwater used for domestic supply in the northern San Joaquin Valley, California
Zeno F. Levy, Mariia Balkan, Jennifer L. Shelton
2021, Fact Sheet 2021-3040
Groundwater provides more than 40 percent of California’s drinking water. To protect this vital resource, the State of California created the Groundwater Ambient Monitoring and Assessment (GAMA) Program. The Priority Basin Project (PBP) of the GAMA Program provides a comprehensive assessment of the State’s groundwater quality and provides increased public...
Peak-flow variability, peak-flow informational needs, and consideration of regional regression analyses in managing the crest-stage gage network in Montana
Steven K. Sando
2021, Scientific Investigations Report 2021-5063
The U.S. Geological Survey (USGS), in cooperation with the Montana Department of Transportation (MDT), has operated a crest-stage gage (CSG) network in Montana to collect peak-flow data since 1955. The CSG network is vital to collecting peak-flow data on small drainage basins that typically are not addressed by continuous streamflow...
The influence of subcolony-scale nesting habitat on the reproductive success of Adélie penguins
Annie E. Schmidt, Grant Ballard, Amélie Lescroël, Katie M. Dugger, Dennis Jongsomjit, Megan L. Elrod, David G. Ainley
2021, Scientific Reports (11)
Group-size variation is common in colonially breeding species, including seabirds, whose breeding colonies can vary in size by several orders of magnitude. Seabirds are some of the most threatened marine taxa and understanding the drivers of colony size variation is more important than ever. Reproductive success is an important demographic...
Energetic and health effects of protein overconsumption constrain dietary adaptation in an apex predator
Karyn D. Rode, Charles T. Robbins, Craig A. Stricker, Brian D. Taras, Troy N Tollefson
2021, Scientific Reports (11)
Studies of predator feeding ecology commonly focus on energy intake. However, captive predators have been documented to selectively feed to optimize macronutrient intake. As many apex predators experience environmental changes that affect prey availability, limitations on selective feeding can affect energetics and health. We estimated the...
Timing and hydrological conditions associated with bigheaded carp movement past navigation dams on the upper Mississippi river
Jonathan M. Vallazza, Kayle J. Mosel, David M. Reineke, Ann L. Runstrom, James H. Larson, Brent C. Knights
2021, Biological Invasions (23) 3409-3425
As the range of non-native bigheaded carps (Hypophthalmichthys spp.) continues to expand throughout river systems of the United States, managers are tasked with preventing or slowing the spread of these invasive species. Main stem navigation dams on the upper Mississippi River, long considered a deterrent to fish...
