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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
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Evidence of Seattle Fault earthquakes from patterns of deep-seated landslides Evidence of Seattle Fault earthquakes from patterns of deep-seated landslides
Earthquake‐induced landslides can record information about the seismic shaking that generated them. In this study, we present new mapping, Light Detection and Ranging‐derived roughness dating, and analysis of over 1000 deep‐seated landslides from the Puget Lowlands of Washington, U.S.A., to probe the landscape for past Seattle fault earthquake information. With this new landslide...
Authors
Erich Herzig, Alison Duvall, Adam Booth, Ian P. Stone, Erin A. Wirth, Sean Richard LaHusen, Joseph Wartman, Alex R. Grant
Movement dynamics influence population monitoring and adaptive harvest management strategies in migratory birds Movement dynamics influence population monitoring and adaptive harvest management strategies in migratory birds
Informed population monitoring efforts are essential for sound management of harvested species, and adaptive strategies that provide detailed information to monitoring efforts often require data inputs from complimentary sources. Movement ecology information is seldom directly incorporated into population monitoring or adaptive harvest management strategies, yet can provide valuable...
Authors
Jay Alan VonBank, Daniel P. Collins, Kristen S. Ellis, J. Patrick Donnelly, Jeffrey M. Knetter
Magnetotelluric insights into the formation and reactivation of trans-crustal shear zones in Precambrian basement of the eastern U.S. Midcontinent Magnetotelluric insights into the formation and reactivation of trans-crustal shear zones in Precambrian basement of the eastern U.S. Midcontinent
Three-dimensional inversion of regional long-period magnetotelluric (MT) data reveals the presence of two distinct sets of high-conductivity belts in the Precambrian basement of the eastern U.S. Midcontinent. One set, beneath Missouri, Illinois, Indiana, and western Ohio, is defined by northwest–southeast-oriented conductivity structures; the other set, beneath Kentucky, West Virginia...
Authors
Benjamin Scott Murphy, Michael S. DeLucia, Stephen Marshak, Dhananjay Ravat, Paul A. Bedrosian
No long-term effect of black bear removal on elk calf recruitment in the southern Appalachians No long-term effect of black bear removal on elk calf recruitment in the southern Appalachians
In 2001 and 2002, 52 elk (Cervus canadensis; 21 males, 31 females), originally obtained from Elk Island National Park, Alberta, Canada, were transported and released into Cataloochee Valley in the northeastern portion of Great Smoky Mountains National Park (GRSM, Park), North Carolina, USA. The annual population growth rate (λ) was negative (0.996, 95% CI = 0.945–1.047) and predation by...
Authors
Joseph G. Yarkovich, Jessica L. Braunstein, Jennifer M. Mullinax, Joseph D. Clark
Sea ice concentration decline in an important Adélie penguin molt area Sea ice concentration decline in an important Adélie penguin molt area
Unlike in many polar regions, the spatial extent and duration of the sea ice season have increased in the Ross Sea sector of the Southern Ocean during the satellite era. Simultaneously, populations of Adélie penguins, a sea ice obligate, have been stable or increasing in the region. Relationships between Adélie penguin population growth and sea ice concentration are complex, with sea ice...
Authors
Annie E. Schmidt, Amélie Lescroël, Simeon Lisovski, Megan Elrod, Dennis Jongsomjit, Katie M. Dugger, Grant Ballard
The use of semiochemicals for attracting and repelling invasive ambrosia beetles (Coleoptera: Curculionidae) in ʻōhiʻa (Metrosideros polymorpha) forests The use of semiochemicals for attracting and repelling invasive ambrosia beetles (Coleoptera: Curculionidae) in ʻōhiʻa (Metrosideros polymorpha) forests
Early detection of invasive species is critical for preventing ecological and economic damage and maintaining ecosystem health. In Hawaiʻi, a complex of generalist ambrosia beetle species in the tribe Xyleborini (Coleoptera: Scolytinae) are threatening the health and productivity of forests and crops due to their association with tree diseases such as rapid ʻōhiʻa death (ROD) and key...
Authors
Kylle Roy, Helen R. Sofaer, Robert W. Peck, Ellen Dunkle, Dan Mikros, Sheri L. Smith, Matthew D. Ginzel
Biocrusts modulate carbon losses under warming across global drylands: A bayesian meta-analysis Biocrusts modulate carbon losses under warming across global drylands: A bayesian meta-analysis
Biocrusts are critical biological components of drylands and play an important role in soil carbon (C) cycling. However, the effect of biocrusts on soil CO2 exchange across global gradients of temperature and moisture is poorly understood. Moreover, their response to climate change remains highly uncertain. Bayesian hierarchical meta-analyses were performed on 47 published studies to...
Authors
Jingyao Sun, Kailiang Yu, Ning Chen, Seth M. Munson, Xinrong Li, Rongliang Jia
Thirty years of regional groundwater-quality trend studies in the United States: Major findings and lessons learned Thirty years of regional groundwater-quality trend studies in the United States: Major findings and lessons learned
Changes in groundwater quality have been evaluated for more than 2,200 wells in 25 Principal Aquifers in the United States based on repeated decadal sampling (once every 10 years) from 1988 to 2021. The purpose of this study is to identify contaminants with changing concentrations, the locations and magnitude of those changes, the factors driving those changes, the obstacles to...
Authors
Bruce D. Lindsey, Brandon J. Fleming, Phillip J. Goodling, Amanda Nicole May
Lipid metabolites index habitat quality for Canvasbacks on stopover areas during spring migration Lipid metabolites index habitat quality for Canvasbacks on stopover areas during spring migration
Nutrients acquired by ducks on spring migratory stopover areas influence survival and subsequent reproduction. Accordingly, wetland loss and degradation on stopover areas can lead to reduced refueling efficiency and have demographic consequences. Lipid metabolite concentrations in blood provide a useful index of daily mass change in wild birds and can be used to make inferences about...
Authors
Andrew Bouton, Michael J. Anteau, Eric J. Smith, Heath Hagy, Joseph Lancasster, Christopher Jacques
Two centuries of southwest Iceland annually-resolved marine temperature reconstructed from Arctica islandica shells Two centuries of southwest Iceland annually-resolved marine temperature reconstructed from Arctica islandica shells
Iceland's exposure to major ocean current pathways of the central North Atlantic makes it a useful location for developing long-term proxy records of past marine climate. Such records provide more detailed understanding of the full range of past variability which is necessary to improve predictions of future changes. We constructed a 225-year (1791–2015 CE) master shell growth chronology...
Authors
Madelyn Jean Mette, Carin Andersson, Bernd Schöne, Fabian Bonitz, Vilde Melvik, Tamara Trofimova, Martin Miles
Permethrin contamination of sawgrass marshes and potential risk for the imperiled Klot’s skipper butterfly (Euphyes pilatka klotsi) Permethrin contamination of sawgrass marshes and potential risk for the imperiled Klot’s skipper butterfly (Euphyes pilatka klotsi)
Nontarget effects from mosquito control operations are possible in habitats adjacent to areas targeted by ultra-low-volume (ULV) sprays of permethrin for adult mosquito control. We assessed the risks of permethrin exposure to butterflies, particularly the imperiled Klot's skipper, when exposed to ground-based ULV sprays. Samples of larval host plant leaves (sawgrass) were collected in...
Authors
Timothy Bargar, Michelle L. Hladik
Reach-scale associations between introduced Brook Trout and juvenile and stream-resident Bull Trout in Idaho Reach-scale associations between introduced Brook Trout and juvenile and stream-resident Bull Trout in Idaho
Objective Native Bull Trout Salvelinus confluentus populations can be influenced by a variety of stressors operating at multiple spatial scales, making the relative importance of biotic versus abiotic controls difficult to discern at small scales where monitoring and management typically occur. Nonnative Brook Trout S. fontinalis were widely introduced throughout western North America...
Authors
Nicholas S. Voss, Brett J. Bowersox, Michael C. Quist