Integration of geophysical evidence suggests that anorthosite composes a significant portion of Grand Marais ridge, an inferred basement high in western Lake Superior
V. J. Grauch, Samuel J. Heller
2021, Conference Paper, Institute on Lake Superior Geology: Proceedings 2021
The Midcontinent Rift System (MRS) is expressed geophysically by a semi-linear, regional gravity high that trends across the Midcontinent and Great Lakes region of North America. The gravity high is interrupted by two prominent, semi-circular gravity lows, which have been interpreted from modeling and seismic-reflection sections as basement highs of...
Field evaluation of an improved solid TFM formulation for use in treating small tributary streams
James A. Luoma, Nicholas Robertson, Justin Schueller, Nicholas Schloesser, Todd Johnson, Todd J. Severson, Matthew J Meulemans, Erica Muelemans
2021, Report
A solid lampricide formulation containing 23% 3-trifluoromethyl-4-nitrophenol (TFM) as the active ingredient was developed in the mid-1980s for use in small tributaries of dendritic streams during routine treatments to kill larval sea lamprey. This TFM bar formulation was designed to use a matrix of commercially prepared surfactants that would dissolve...
Alaska landbird montoring survey: Alaska regional protocol framework for monitoring landbirds using point counts
Colleen M. Handel, Steven M. Matsuoka, Melissa N. Cady, Diane A. Granfors
2021, Report
Alaska provides habitat for 143 species of landbirds that occur regularly in the state, about half of which breed predominantly north of the border between the contiguous United States and Canada. The road-based North American Breeding Bird Survey (BBS) provides some data on population trends in Alaska, but most northern...
Using tree-rings to unravel avalanche frequency and associated climate drivers in the northern Rocky Mountains
Erich Peitzsch
2021, Newsletter, Earth Science Matters
No abstract available....
Improving species status assessments under the U.S. Endangered Species Act and implications for multispecies conservation challenges worldwide
Reed Noss, Jennifer M. Cartwright, Dwayne Estes, Theo Witsell, Gregg Elliott, Daniel S. Adams, Matthew A. Albrecht, Ryan Boyles, Patrick Comer, Chris Doffitt, JoVonn G. Hill, William C. Hunter, Wesley M. Knapp, Mike Marshall, Jason R. Singhurst, Christopher Tracey, Jeffrey L. Walck, Alan Weakley
2021, Conservation Biology (35) 1715-1724
Despite its successes, the U.S. Endangered Species Act (ESA) has proven challenging to implement due to funding limitations, workload backlog, and other problems. As threats to species survival intensify and as more species come under threat, the need for the ESA and similar conservation laws and policies in other countries...
Quantification of manganese for ChemCam Mars and laboratory spectra using a multivariate model
Patrick J. Gasda, Ryan B. Anderson, A. Cousin, O. Forni, S. M. Clegg, A. Ollila, Nina L. Lanza, S Lamm, Roger C. Wiens, Sylvestre Maurice, Olivier Gasnault, R. Beal, A. Reyes-Newell, D. Delapp
2021, Spectrochimica Acta B (181)
We report a new calibration model for manganese using the laser-induced breakdown spectroscopy instrument that is part of the ChemCam instrument suite onboard the NASA Curiosity rover. The model has been trained using an expanded set of 523 manganese-bearing rock, mineral, metal ore, and synthetic standards. The...
Reptile and amphibian diversity and abundance in an urban landscape: Impacts of fragmentation and the conservation value of small patches
Kathleen Semple Delaney, Gary Busteed, Robert N. Fisher, Seth P.D. Riley
2021, Ichthyology & Herpetology (109) 424-435
Urbanization is a major contributor to habitat loss and fragmentation and is considered a global threat to biodiversity. We studied reptile and amphibian species diversity and abundance in a highly fragmented landscape adjacent to the second largest metropolitan area in the United States. Habitat patches in our...
Perfluoroalkyl substances in plasma of smallmouth bass from the Chesapeake Bay Watershed
Vicki S. Blazer, Stephanie E. Gordon, Heather L. Walsh, Cheyenne R. Smith
2021, International Journal of Environmental Research and Public Health (11)
Smallmouth bass Micropterus dolomieu is an economically important sportfish and within the Chesapeake Bay watershed has experienced a high prevalence of external lesions, infectious disease, mortality events, reproductive endocrine disruption and population declines. To date, no clear or consistent associations with contaminants measured in fish tissue or surface water have been...
Surface flow velocities from space: Particle image velocimetry of satellite video of a large, sediment-laden river
Carl J. Legleiter, Paul J. Kinzel
2021, Frontiers in Water (3)
Conventional, field-based streamflow monitoring in remote, inaccessible locations such as Alaska poses logistical challenges. Safety concerns, financial considerations, and a desire to expand water-observing networks make remote sensing an appealing alternative means of collecting hydrologic data. In an ongoing effort to develop non-contact methods for measuring river discharge, we evaluated...
Flood-inundation maps for the Blue River near Red Bridge Road, Kansas City, Missouri, 2019
David C. Heimann, Jonathon D. Voss, Paul H. Rydlund Jr.
2021, Scientific Investigations Report 2020-5057
Digital flood-inundation maps for a 4.6-mile reach of the Blue River near Red Bridge Road in Kansas City, Missouri, were created by the U.S. Geological Survey (USGS), in cooperation with the City of Kansas City, Missouri. The flood-inundation maps, which can be accessed through the USGS Flood Inundation Mapping Program...
Characterization of historical and stochastically generated climate and streamflow conditions in the Souris River Basin, United States and Canada
Angela Gregory, Joel M. Galloway
2021, Scientific Investigations Report 2021-5044
The Souris River Basin is a 61,000-square-kilometer basin in the Provinces of Saskatchewan and Manitoba in Canada and the State of North Dakota in the United States. Greater than average snowpack during the winter of 2010–11, along with record-setting rains in May and June 2011, resulted in historically unprecedented flooding...
Introduction: Does water flow on Martian slopes?
Colin M. Dundas, Susan J. Conway, David E Stillman
2021, Book chapter, Mars Geological Enigmas From the Late Noachian Epoch to the Present Day
No abstract available....
Dry formation of recent Martian slope features
Colin M. Dundas
2021, Book chapter, Mars Geological Enigmas From the Late Noachian Epoch to the Present Day
Martian surface conditions are cold and dry, unfavorable for liquid water, yet steep slopes display young and currently active features suggestive of wet processes. These include recurring slope lineae and slope streaks, gully landforms, and small lobate features. Wet origins for these...
Floral resource selection by wild bees and honey bees in the Midwest United States: Implications for designing pollinator habitat
Stacy C. Simanonok, Clint Otto, Deborah A. Buhl
2021, Restoration Ecology (29)
Many seed mix recommendations for creating pollinator habitat are in part based on anecdotal evidence or field observations of bees visiting forbs (i.e. use). However, there is limited information on what forbs are preferred by bees, particularly in working landscapes where bee forage may be limited....
Amplified impact of climate change on fine-sediment delivery to a subsiding coast, Humboldt Bay, California
Jennifer Curtis, Lorraine E. Flint, Michelle A. Stern, Jack Lewis, Randy D. Klein
2021, Estuaries and Coasts (44) 2173-2193
In Humboldt Bay, tectonic subsidence exacerbates sea-level rise (SLR). To build surface elevations and to keep pace with SLR, the sediment demand created by subsidence and SLR must be balanced by an adequate sediment supply. This study used an ensemble of plausible future scenarios to predict potential climate change impacts...
Declining diversity of wild-caught species puts dietary nutrient supplies at risk
Sebastian A. Heilpern, Ruth DeFries, Kathryn J. Fiorella, Alexander Flecker, Suresh Sethi, María Uriarte, Shahid Naeem
2021, Science Advances (7)
Although biodiversity loss adversely influences a variety of ecosystem functions, how declining wild food diversity affects nutrient supplies for people is poorly understood. Here, we analyze the impact of declining biodiversity on nutrients supplied by fish using detailed information from the Peruvian Amazon, where inland fisheries provide a...
Use of the smeltCam as an efficient fish sampling alternative within the San Francisco Estuary
Brock Huntsman, Frederick V. Feyrer, Matthew J. Young
2021, San Francisco Estuary and Watershed Science (19)
Resource managers often rely on long-term monitoring surveys to detect trends in biological data. However, no survey gear is 100% efficient, and many sources of bias can be responsible for detecting or not detecting biological trends. The SmeltCam is an imaging apparatus developed as a potential sampling alternative to long-term...
Predicting light regime controls on primary productivity across CONUS river networks
Philip Savoy, Judson Harvey
2021, Geophysical Research Letters (48)
Solar radiation is a fundamental driver of ecosystem productivity, but widespread estimates of light available for primary producers in rivers are lacking. We developed a model to predict light available for river primary producers and used it to estimate river primary production across the contiguous United States...
Ten years of volcanic activity at Mt Etna: High-resolution mapping and accurate quantification of the morphological changes by Pleiades and Lidar data
Marina Bisson, Claudia Spinetti, Daniele Andronico, Monica Palaseanu-Lovejoy, Maria Fabrizia Buongiorno, Oleg Alexandrov, Thomas Cecere
2021, International Journal of Applied Earth Observations and Geoinformation (102)
The topography of Mt. Etna, Italy, is subjected to continuous modifications depending on intensity and magnitude of eruptions that frequently occur at the volcano summit and flanks. In order to make high-resolution maps of morphological changes and accurately calculate the overall volume of the erupted products (e.g., lava flows, tephra...
The contribution of land cover change to the decline of honey yields in the Northern Great Plains
David Smith, Amelie Y. Davis, Claudia Hitaj, Dan Hellerstein, Amanda Preslicka, Emma Kirkpatrick, David M. Mushet, Eric Lonsdorf
2021, Environmental Research Letters (16)
Decreased availability of forage, as well as increased pesticide exposure, are important factors in the decline of honey bee health. Here, we isolate land cover transitions and their effect on honey production at 160 commercial apiaries in the Northern Great Plains. We found that land cover changes from 2008 to...
Overview and methodology for a study to identify fecal contamination sources using microbial source tracking in seven embayments on Long Island, New York
Tristen N. Tagliaferri, Shawn C. Fisher, Christopher M. Kephart, Natalie Cheung, Ariel P. Reed, Robert J. Welk
2021, Scientific Investigations Report 2021-5033
Between June 2018 and July 2019, the U.S. Geological Survey collaborated with the New York State Department of Environmental Conservation to analyze water quality in seven embayments on Long Island, New York, for a study to examine fecal contamination using microbial source tracking. This report documents the approach, methodology, and...
Spring 2021 edition
Molly L. McCormick, Seth M. Munson
2021, Newsletter
No abstract available....
Improving short-term recruitment forecasts for coho salmon using a spatiotemporal integrated population model
Lukas B. DeFilippo, Thomas W. Buehrens, Mark David Scheuerell, Neala W. Kendall, Daniel E. Schindler
2021, Fisheries Research (242)
Fishery managers often rely on forecasts of future population abundance to set allowable harvest quotas or exploitation rates. While there has been substantial research devoted to identifying environmental factors that can predict recruitment for individual populations, such correlations often degrade over time, thereby limiting their utility for management. Conversely, examining...
Large-scale variation in wave attenuation of oyster reef living shorelines and the influence of inundation duration
R. L. Morris, Megan K. La Peyre, B. M. Webb, D. A. Marshall, D. M. Bilkovic, J. Cebrian, G. McClenachan, K. M. Kibler, L. J. Walters, D. Bushek, E. L. Sparks, N. A. Temple, J. A. Moody, K. Angstadt, J. Goff, M. K. Boswell, P. E. Sacks, S. E. Swearer
2021, Ecological Applications (31)
One of the paramount goals of oyster reef living shorelines is to achieve sustained and adaptive coastal protection, which requires meeting ecological (i.e., develop a self-sustaining oyster population) and engineering (i.e., provide coastal defense) targets. In a large-scale comparison along the Atlantic and Gulf coasts of the United States, the...
Appendix C: Central sands lakes study technical report: Modeling documentation
Michael N. Fienen, Megan J. Haserodt, Andrew T. Leaf, Stephen, M. Westenbroek
2021, Report
This report provides the necessary documentation of the numerical models developed for the Central Sands Lake study in central Wisconsin and will be included as a technical appendix in the report to the Wisconsin State Legislature by the Wisconsin Department of Natural Resources (WDNR) in response to 2017 Wisconsin Act...
