Geomagnetic monitoring in the mid-Atlantic United States
Jeffrey J. Love, Kristen A. Lewis
2021, Fact Sheet 2021-3001
Near historic battlegrounds of the American Civil War, southeast of Fredericksburg, Virginia, on a secluded grassy glade surrounded by forest, a specially designed observatory records the Earth’s changing magnetic field. This facility, the Fredericksburg Magnetic Observatory, is 1 of 14 observatories the U.S. Geological Survey Geomagnetism Program operates at various...
Toward an effective global green economy: The Critical Minerals Mapping Initiative (CMMI)
Karen D. Kelley, David Huston, Jan Peter
2021, Newsletter
Global population growth, economic development and the accelerating pace of technological innovation are driving increased demand for non-fuel mineral commodities that are vital for emerging and low-carbon technologies. Examples of such commodities include cobalt and graphite for rechargeable batteries, tellurium in thin-film solar photovoltaics and rare earth elements (REE) in...
G-LiHT User Guide
Bradford Wirt
2021, Book
No abstract available....
Egg morphometrics and egg shape coefficients for White-faced Ibis (Plegadis chihi)
Mark P. Herzog, Josh T. Ackerman, C. Alex Hartman
2021, The Wilson Journal of Ornithology (133) 158-162
Egg size is a useful metric for maternal investment, offspring quality, and contaminant studies. Yet these values and the egg shape coefficients required to estimate egg size are not available for many species, including White-faced-Ibis (Plegadis chihi). We provide egg morphometrics derived from 319 White-faced Ibis eggs sampled at Bear...
Tarentola annularis (white-spotted wall gecko)
Samuel R Fisher, Chelsea E Martin, Robert N. Fisher
2021, Herpetological Review (52) 85
USA: CALIFORNIA: Orange Co.: San Juan Capistrano (33.51°N,117.66°W; WGS 84). 25 August 2020. Samuel Fisher, Chelsea Martin, Robert Fisher. Verified by Gregory B. Pauly. Natural History Museum of Los Angeles County (LACM 191974). New county record. One juvenile (33 mm SVL) was collected, and another juvenile was seen 40 m...
Molecular and isotopic gas composition of the Devonian Berea Sandstone and implications for gas evolution, eastern Kentucky
T. M. Parris, Paul C. Hackley, S. F. Greb, C. F. Eble
2021, American Association of Petroleum Geologists Bulletin (105) 575-595
Since 2011, the Devonian Berea Sandstone in northeastern Kentucky has produced oil where thermal maturity studies indicate that likely source rocks, namely, the Devonian Ohio Shale and Mississippian Sunbury Shale, are thermally immature. Downdip, where source rocks are mature for oil, the Berea Sandstone and Ohio Shale primarily produce...
Paragenesis of an orogenic gold deposit: New insights on mineralizing processes at the Grass Valley District, California
Ryan D. Taylor, Thomas Monecke, T. James Reynolds, Jochen Monecke
2021, Economic Geology (116) 323-356
The Grass Valley orogenic gold district in the Sierra Nevada foothills province, central California, is the largest historical gold producer of the North American Cordillera. Gold mineralization is associated with shallowly dipping north-south veins hosted by the 160 Ma Grass Valley granodiorite to the southwest of the Grass Valley fault...
Cloud water interception in Hawai‘i: Developing capacity to characterize the spatial patterns and effects on water and ecological processes responses in Hawai‘i
Han Tseng, Lucas Fortini, Alan Mair, Aurora Kagawa-Viviani, Stephanie G. Yelenik, Yoshiyuki Miyazawa, Michael A Nullet, Joseph Kennedy, John DeLay, Christina Leopold, Thomas Giambelluca
2021, Report, Pacific Island Climate Adaptation Science Center Final Technical Report
Cloud-water interception (CWI) is the process by which fog or cloud water droplets are captured and accumulate on the leaves and branches of plants, some of which drips to the ground. Prior studies in Hawai'i indicate that CWI is highly variable and can contribute substantially to total precipitation. In this...
Summer Diet of Juvenile Lake Sturgeon Reintroduced into the Genesee and St. Regis Rivers, New York USA
Dawn E. Dittman, Marc Chalupnicki
2021, Journal of Applied Ichthyology (37) 507-513
The restoration of threatened species involves understanding multiple aspects of the life history and ecology of the target species. One important consideration in the restoration of threatened species is feeding ecology. We examined the summer diet of reintroduced juvenile lake sturgeon (Acipenser fulvescens) in the Genesee (n = 119, ages 1 and...
Characterization of deep-sea coral and sponge communities in Greater Farallones National Marine Sanctuary: Point Arena South Essential Fish Habitat Conservation Area and New Amendment 28 Areas
Kaitlin Graiff, Jan Roletto, Sage Tezak, Gary E. Williams, Guy R. Cochrane
2021, Report
This report summarizes samples collected during a remotely operated vehicle (ROV) cruise conducted in October 2019 on board E/V Nautilus. Areas sampled in Greater Farallones National Marine Sanctuary included areas proposed for fisheries management zoning in the Point Arena South (PAS) Essential Fish Habitat Conservation Area (EFH). Dive planning targeted...
Avoidance of cold-, cool-, and warm-water fishes to Zequanox® exposure
Matthew Barbour, James A. Luoma, Todd J. Severson, Jeremy K. Wise, Barbara Bennie
2021, Management of Biological Invasions (12) 96-107
Zequanox® is a biopesticide registered by the U.S. Environmental Protection Agency (USEPA) and the Canadian Pest Management Regulatory Agency for controlling dreissenid mussels with demonstrated selective toxicity. However, some research has indicated that Zequanox may impact the body condition and survival of some non-target species. We assessed avoidance behaviors of...
The influence of species life history and distribution characteristics on species responses to habitat fragmentation in an urban landscape
Staci M. Amburgey, David A. W. Miller, Carlton J. Rochester, Katy S. Delaney, Seth P. D. Riley, Cheryl S. Brehme, Stacie A. Hathaway, Robert N. Fisher
2021, Journal of Animal Ecology (90) 685-697
Fragmentation within urbanized environments often leads to a loss of native species diversity; however, variation exists in responses among-species and among-populations within species.We aimed to identify patterns in species biogeography in an urbanized landscape to understand anthropogenic effects on vertebrate communities and identify species that are more sensitive or...
Comparing tree-ring based reconstructions of snowpack variability at different scales for the Navajo Nation
Rebecca Lynn Brice, Christopher H. Guiterman, Connie A. Woodhouse, Carlee McClellan, Paul Sheppard
2021, Climate Services (22)
Snowpack in the western U.S. is on the decline, largely attributed to increasing temperatures in the region. This is a critical issue for many Native American communities who disproportionately rely on local snow-fed water supplies. In light of a combined ongoing drought...
Rock gnome lichen (Gymnoderma lineare) monitoring assessment, southern Appalachian Mountains, 1983–2008
Andrea Woodward
2021, Open-File Report 2021-1011
Rock gnome lichen (Gymnoderma lineare [Evans] Yoshimura and Sharp) was listed as a federally endangered species in 1995. It is endemic to the southern Appalachian Mountains, with most known populations occurring in North Carolina, where it grows on vertical rock faces in the fog zone above an elevation...
The role of the U.S. Geological Survey in monitoring North Dakota’s environmental conditions
Karen R. Ryberg
2021, Newsletter, North Dakota Climate Bulletin
No abstract available. ...
Eocene magma plumbing system beneath Cortez Hills Carlin-type gold deposit, Nevada: Is there a deep-seated pluton?
Celestine N. Mercer
2021, Economic Geology (116) 501-513
The magmatic-hydrothermal conceptual model for Carlin-type gold deposit genesis calls upon deep-seated Eocene plutons as the primary source of gold-bearing fluids. However, geophysical surveys, geologic mapping, drilling, geochronology, isotopic tracers, and fluid inclusion chemistry have returned ambiguous evidence for the existence of such plutons. The...
Preface to the Focus Section on the 2020 Intermountain West earthquakes
Ryan D. Gold, Jayne Bormann, Keith D. Koper
2021, Seismological Research Letters (92)
The Intermountain West region of the United States extends from the eastern margin of the Sierra Nevada and Cascade Mountains in the west to the Rocky Mountains in the east. The region is characterized by dextral shear along the eastern margin of the Sierra Nevada and nearly east-west extension in...
Unmixing multiple metamorphic muscovite age populations with powder X-ray diffraction and 40Ar/39Ar analysis
Ryan J. McAleer, David Bish, Michael J. Kunk, Peter M. Valley, Gregory J. Walsh, Robert Wintsch
2021, American Journal of Science (321) 332-364
A combination of modal estimates from powder X-ray diffraction (XRD) experiments and argon isotopic data shows that muscovite 40Ar/39Ar total gas age correlates with muscovite composition near the retrograde Bald Mountain shear zone (BMSZ) in Claremont, New Hampshire, and that the shear zone was active at ∼245...
The genetic composition of wild recruits in a recovering lake trout population in Lake Michigan
Wesley A. Larson, Matthew S. Kornis, Keith N. Turnquist, Charles R. Bronte, Mark E. Holey, S. Dale Hanson, Theodore J. Treska, Wendylee Stott
2021, Canadian Journal of Fisheries and Aquatic Sciences (78) 286-300
Strain performance evaluations are vital for developing successful fishery management and restoration strategies. Here, we utilized genotypes from 36 microsatellites to investigate hatchery strain contribution to collections of naturally produced lake trout (Salvelinus namaycush) sampled across Lake Michigan. Strain composition varied by area, with recoveries of Seneca Lake strain exceeding...
Mixed-stock analysis in the age of genomics: Rapture genotyping enables evaluation of stock-specific exploitation in a freshwater fish population with weak genetic structure
Peter T. Euclide, Tom MacDougall, Jason M. Robinson, Matthew D. Faust, Chris C. Wilson, Kuan-Yu Chen, Elizabeth A. Marschall, Wesley Larson, Stuart A. Ludsin
2021, Evolutionary Applications (14) 1403-1420
Mixed-stock analyses using genetic markers have informed fisheries management in cases where strong genetic differentiation occurs among local spawning populations, yet many fisheries are supported by multiple spawning stocks that are weakly differentiated. Freshwater fisheries exemplify this problem, with many harvested populations supported by multiple stocks of young evolutionary age...
Nest microclimates of Greater Sage-Grouse in a post-megafire landscape: does selection equate to success?
Christopher R. Anthony, Christian A. Hagen, Katie Dugger, R. Dwayne Elmore
2021, Ornithological Applications (123)
Temperature at fine spatial scales is an important driver of nest site selection for many avian species during the breeding season and can influence nest success. Sagebrush (Artemisia spp.) communities have areas with high levels of vegetation heterogeneity and high thermal variation; however, fire removes vegetation that provides protection from...
Contrasting patterns of demography and population viability among gopher tortoise (Gopherus polyphemus) populations at the species’ northern range edge
Brian Folt, J.M. Goessling, A. M. Tucker, C. Guyer, S. Herman, E. Shelton-Nix, Conor P. McGowan
2021, Journal of Wildlife Management (85) 617-630
Population viability analyses are useful tools to predict abundance and extinction risk for imperiled species. In southeastern North America, the federally threatened gopher tortoise (Gopherus polyphemus) is a keystone species in the diverse and imperiled longleaf pine (Pinus palustris) ecosystem, and researchers have suggested that tortoise populations are declining and...
Waif gopher tortoise survival and site fidelity following translocation
R.K. McKee, K.A. Buhlmann, Clinton T. Moore, J. Hepinstall-Cymerman, T.D. Tuberville
2021, Journal of Wildlife Management (85) 640-653
Gopher tortoises (Gopherus polyphemus) are among the most commonly translocated reptiles. Waif tortoises are animals frequently of unknown origin that have been displaced from the wild and often held in human possession for various reasons and durations. Although there are risks associated with any translocation, waif tortoises are generally excluded...
Seal body condition and atmospheric circulation patterns influence polar bear body condition, recruitment, and feeding ecology in the Chukchi Sea
Karyn D. Rode, Eric V. Regehr, Jeffrey F. Bromaghin, Ryan H. Wilson, Michelle St. Martin, Justin A. Crawford, Lori T. Quakenbush
2021, Global Change Biology (27) 2684-2701
Polar bears (Ursus maritimus) are experiencing loss of sea ice habitats used to access their marine mammal prey. Simultaneously, ocean warming is changing ecosystems that support marine mammal populations. The interactive effects of sea ice and prey are not well understood yet may explain spatial‐temporal variation in the response of...
2021 Computational Infrastructure for Geodynamics Developers Workshop
Brad T. Aagaard, Jed Brown, Catherin Cooper, Rene Gassmoeller, Lorraine Hwang, Marc Spiegelman
2021, Conference Paper
The CIG Developers Workshop resulted in a number of recommendations that we think will help expand the CIG developer community, make software more accessible to new users, and increase developer productivity through use of common infrastructure and best practices for software development. This includes building a broad user base with...
