Simulating the effects of climate-related changes to air temperature and precipitation on streamflow and water temperature in the Meduxnekeag River watershed, Maine
David M. Bjerklie, Scott A. Olson
2021, Scientific Investigations Report 2021-5104
Responsible stewardship of native fish populations and riparian plants in the Meduxnekeag River watershed in northeastern Maine is a high priority for the Houlton Band of Maliseet Indians. Understanding the potential changes in hydrology and water temperature as a result of climate change is important to this priority for evaluating...
Gopherus polyphemus (Gopher Tortoise). Twinning
Kevin J. Loope, J. Nicole DeSha, Garrett R. Lawson, Elizabeth Ann Hunter
2021, Herpetological Review (52) 846-847
No abstract available....
Streambed scour of salmon (Oncorhynchus spp.) redds in the Sauk River, Northwestern Washington
Andrew S. Gendaszek
2021, Scientific Investigations Report 2021-5133
The autumn and winter flood season of western Washington coincides with the incubation period of many Pacific salmon (Onchorhynchus spp.) populations. During this period, salmon embryos incubating within gravel nests called “redds” are vulnerable to mobilization of surrounding sediment during floods. As overlying sediment is transported downstream, the vertical...
Selected crater and small caldera lakes in Alaska: Characteristics and hazards
Christopher F. Waythomas
2021, Frontiers in Earth Science (9)
This study addresses the characteristics, potential hazards, and both eruptive and non-eruptive role of water at selected volcanic crater lakes in Alaska. Crater lakes are an important feature of some stratovolcanoes in Alaska. Of the volcanoes in the state with known Holocene eruptive activity, about one third have summit crater...
A characterization of deep-sea coral and sponge communities along the California and Oregon coast using a remotely operated vehicle on the EXPRESS 2018 expedition
Tom Laidig, Diana Watters, Nancy G. Prouty, Meredith Everett, Lizzie Duncan, Liz Clarke, Chris Caldow, Amanda Demopoulos
2021, NOAA Technical Memorandum NMFS-SWFSC 657
Deep-sea coral and sponge (DSCS) communities serve as essential fish habitats (EFH) by providing shelter and nursery habitat, increasing diversity, and increasing prey availability (Freese and Wing, 2003; Bright, 2007; Baillon et al., 2012; Henderson et al., 2020). Threats to these long-lived, fragile organisms from bottom contact fishing gear, potential...
Invasive carp population modeling to support an adaptive management framework
Richard A. Erickson
2021, Report, Interim summary report: Invasive carp monitoring and response plan 2021
No abstract available....
Quantification of metal loading using tracer dilution and instantaneous synoptic sampling and importance of diel cycling in Leavenworth Creek, Clear Creek County, Colorado, 2012
Katherine Walton-Day, Robert L. Runkel, Christin D. Smith, Briant A. Kimball
2021, Open-File Report 2021-1078
Leavenworth Creek, a tributary of South Clear Creek and Clear Creek near Georgetown, Colorado, contains copper, lead, and zinc at concentrations close to or in excess of aquatic-life standards. In the summer of 2012, the U.S. Geological Survey, in cooperation with the U.S. Department of Agriculture Forest Service and the...
Continuous turbidity data used to compute constituent concentrations in the South Loup River, Nebraska, 2017–18
David L. Rus, Brenda K. Densmore
2021, Scientific Investigations Report 2021-5120
The South Loup River in central Nebraska has been impaired by bacteria since at least 2004, which has resulted in the river not meeting its intended use as a recreational waterway. As part of a strategy for reducing the bacterial load in the river, the U.S. Geological Survey, in cooperation...
Assessing cormorant populations and association with fish stocking in Texas
Sophie A. Morris, Clint W. Boal, Reynaldo Patino
2021, Bulletin of the Texas Ornithological Society (54) 1-8
—Double-Crested Cormorants (Nannopterum auritum) and Neotropic Cormorants (Nannopterum brasilianum) are thought to be expanding their populations across Texas. This expansion is cause for a concern for both fish stocking and fisheries management in public waters. To examine the historic and current populations and distributions of cormorants, we first evaluated the...
Data-driven prospectivity modelling of sediment-hosted mineral systems
Christopher J.M. Lawley, Anne E. McCafferty, Garth E. Graham, Michael G. Gadd, David L. Huston, Karen D. Kelley, Karol Czarnota, Suzanne Paradis, Jan M. Peter, Nathan Hayward, Mike Barlow, Poul Emsbo, Joshua A. Coyan, Carma A. San Juan
2021, Conference Paper
Mississippi Valley-type (MVT) and clastic-dominated (CD) deposits are important sources for Zn, Pb, Ag, and Cd as well as the critical elements Ga, Ge, In, and Sb. However, mapping the drivers, sources, pathways, and traps of MVT and CD deposits within the much larger and mostly unmineralized sedimentary basins remain...
Exploring basin-scale relations and unsupervised classification to quantify and automate the definition of assessment units in USGS continuous oil and gas resource assessments
Chilisa Marie Shorten, Scott A. Kinney, Katherine J. Whidden
2021, Conference Paper
The U.S. Geological Survey (USGS) assesses potential for undiscovered, technically recoverable oil and gas resources in priority geologic provinces and quantifies resource volume estimates within subdivisions called assessment units (AUs). AU boundaries are defined by USGS geologists using quantitative and qualitative geologic information. Variables contained in IHS Markit’s well and...
Effects of sample gear on estuarine nekton assemblage assessments and food web model simulations
Megan K. La Peyre, S. Sable, C. M. Taylor, Katherine S. Watkins, E. Kiskaddon, M. Baustian
2021, Ecological Indicators (133)
Long-term fisheries-independent sampling data inform population status and trends of species-specific biomass and are often used to drive biomass-based food web models such as the Comprehensive Aquatic Systems Model (CASM). Indicators such as total biomass and mean trophic level derived from these data and from CASM outputs inform management and facilitate...
Supplemental vegetation monitoring plots at Little Bighorn Battlefield National Monument to accelerate learning of the Annual Brome Adaptive Management (ABAM) model
Amy Symstad, Timm Richardson, Dan Swanson
2021, Report
The Annual Brome Adaptive Management (ABAM) project is a consortium of seven parks in the Northern Great Plains (NGP) working together to better understand how to control invasive annual grasses (including Bromus species) through an adaptive management approach. This approach is supported by a quantitative model that uses current data...
Genomics reveals identity, phenology and population demographics of larval ciscoes (Coregonus artedi, C. hoyi, and C. kiyi) in the Apostle Islands, Lake Superior
Hannah Lachance, Amanda Susanne Ackiss, Wesley Larson, Mark Vinson, Jason D. Stockwell
2021, Journal of Great Lakes Research (47) 1849-1857
We demonstrate, for the first time, the ability to reliably assign an assemblage of larval coregonines [Salmonidae Coregoninae] to shallow and multiple deepwater species. Larval coregonines from the Apostle Islands, Lake Superior, were genotyped using restriction site-associated DNA sequencing (RADseq) and were assigned to species using reference genotypes from adult...
Simultaneous effusive and explosive cinder cone eruptions at Veniaminof Volcano, Alaska
Christopher F. Waythomas
2021, Volcanica (4) 295-307
Historical eruptions of Veniaminof Volcano, Alaska have all occurred at a 300-m-high cinder cone within the icefilled caldera that characterizes the volcano. At least six of nineteen historical eruptions involved simultaneous explosive and effusive activity from separate vents. Eruptions in 1944, 1983–1984, 1993–1994, 2013, 2018 and 2021 included periods of explosive ash-producing Strombolian...
Inter- and intra-annual effects of lethal removal on common raven abundance in Nevada and California, USA
Shawn T. O’Neil, Peter S. Coates, Julia C. Brockman, Pat J. Jackson, Jack O. Spencer Jr., Perry J. Williams
2021, Human–Wildlife Interactions (15)
Populations of common ravens (Corvus corax; ravens) have increased rapidly within sagebrush (Artemisia spp.) ecosystems between 1960 and 2020. Although ravens are native to North America, their population densities have expanded to levels that negatively influence the population dynamics of other wildlife species of conservation concern, such as greater sage-grouse (Centrocercus...
Metal accumulation in Lake Michigan prey fish: Influence of ontogeny, trophic position, and habitat
Whitney M. Conard, Brandon S. Gerig, Lea M. Lovin, David Bunnell, Gary A. Lamberti
2021, Journal of Great Lakes Research (47) 1746-1755
Developing an understanding of factors that influence the accumulation and magnification of heavy metals in fish of the Laurentian Great Lakes is central to managing ecosystem and human health. We measured muscle tissue concentrations of heavy metals in Lake Michigan prey fish that vary in habitat use, diet, and trophic...
Spatial modeling of common raven density and occurrence helps guide landscape management within Great Basin sagebrush ecosystems
Sarah C. Webster, Shawn T. O’Neil, Brianne E. Brussee, Peter S. Coates, Pat J. Jackson, John C. Tull, David J. Delehanty
2021, Human–Wildlife Interactions (15)
Common ravens (Corvus corax; ravens) are a behaviorally flexible nest predator of several avian species, including species of conservation concern. Movement patterns based on life history phases, particularly territoriality of breeding birds and transiency of nonbreeding birds, are thought to influence the frequency and efficacy of nest predation. As such,...
Dispersion and stratification dynamics in the upper Sacramento River deep water ship channel
Leah Lenoch, Paul Stumpner, Jon R. Burau, Luke C. Loken, Steven Sadro
2021, San Francisco Estuary and Watershed Science (19)
Hydrodynamics control the movement of water and material within and among habitats, where time-scales of mixing can exert bottom-up regulatory effects on aquatic ecosystems through their influence on primary production. The San Francisco Estuary (estuary) is a low-productivity ecosystem, which is in part responsible for constraining higher trophic levels, including...
Retreat and regrowth of the Greenland Ice Sheet during the Last Interglacial as simulated by the CESM2-CISM2 coupled climate–ice sheet model
Aleah Sommers, Bette L. Otto-Bliesner, William Lipscomb, Marcus Lofverstrom, Sarah Shafer, Patrick J. Bartlein, Esther C. Brady, Erik Kluzek, Gunter Leguy, Katherine Thayer-Calder, Robert Tomas
2021, Paleoceanography and Paleoclimatology (36)
During the Last Interglacial, approximately 129 to 116 ka (thousand years ago), the Arctic summer climate was warmer than the present, and the Greenland Ice Sheet retreated to a smaller extent than its current state. Previous model-derived and geological reconstruction estimates of the sea-level contribution of the Greenland Ice Sheet...
Clustering supported classification of ChemCam data from Gale crater, Mars
K. Rammelkamp, Olivier Gasnault, Olivier Forni, Candice C. Bedford, Erwin Dehouck, Agnes Cousin, Jeremie Lasue, Gael David, Travis S.J. Gabriel, Sylvestre Maurice, Roger C. Wiens
2021, Earth and Space Science (8)
The Chemistry and Camera (ChemCam) instrument on board the MSL rover Curiosity has collected a very large and unique dataset of in-situ spectra and images of Mars since landing in August 2012. More than 800,000 single shot LIBS (laser-induced breakdown spectroscopy) spectra measured on more than 2,500 individual targets were...
Bar-tailed Godwits Limosa lapponica in Alaska: Revisiting population estimates from the staging grounds
Daniel R. Ruthrauff, Zak Pohlen, Heather M. Wilson, James Johnson
2021, Wader Study (128) 255-264
Bar-tailed Godwits Limosa lapponica baueri breed in Alaska and spend the nonbreeding season primarily in eastern Australia and New Zealand. Long-term declines spurred recent surveys at nonbreeding sites that yielded a revised population estimate of ~126,000 godwits. We conducted aerial surveys for Bar-tailed Godwits in 2018 and 2019 at pre-migratory...
Changes in liquefaction severity in the San Francisco Bay Area with sea-level rise
Alex R. Grant, Anne Wein, Kevin M. Befus, Juliette Finzi-Hart, Mike Frame, Rachel Volentine, Patrick L. Barnard, Keith L. Knudsen
2021, Conference Paper, Geo-Extreme 2021: Climatic Extremes and Earthquake Modeling
This paper studies the impacts of sea-level rise on liquefaction triggering and severity around the San Francisco Bay Area, California, for the M 7.0 “HayWired” earthquake scenario along the Hayward fault. This work emerged from stakeholder engagement for the US Geological...
Alaska natural gas hydrate production testing: Test site selection, characterization and testing operations
Timothy Collett
2021, Report
This Interagency Agreement supports the U.S. Department of Energy (DOE) and its research partners in understanding, predicting, and testing the recoverability and potential production characteristics of onshore natural gas hydrate in the Greater Prudhoe Bay area on the Alaska North Slope (ANS: Prudhoe Bay, Kuparuk River, and Milne...
Climate change risks and adaptation options for Madagascar
Sarah R. Weiskopf, Janet Alice Cushing, Toni Lyn Morelli, Bonnie Myers
2021, Ecology and Society (26)
Climate change poses an increasing threat to achieving development goals and is often considered in development plans and project designs. However, there have been challenges in the effective implementation of those plans, particularly in the sustained engagement of the communities to undertake adaptive actions, but also due to insufficient scientific...
