Erratum to Broadband synthetic seismograms for magnitude 9 earthquakes on the Cascadia megathrust based on 3D simulations and stochastic synthetics, Part 1: methodology and overall results
Arthur D. Frankel, Erin A. Wirth, Nasser A. Marafi, John Vidale, William J. Stephenson
2019, Bulletin of the Seismological Society of America (109) 487
No abstract available....
The ~1.85 Ga carbonatite in north China and its implications on the evolution of the Columbia supercontinent
Yuling Xie, Yunwei Qu, Richen Zhong, Philip L. Verplanck, Sebastien Meffre, Daoxue Xu
2019, Gondwana Research (65) 125-141
Mantle-derived carbonatites provide a unique window in the understanding of mantle characteristics and dynamics, as well as insight into the assembly and breakup of supercontinents. As a petrological indicator of extensional tectonic regimes, Archean/Proterozoic carbonatites provide important constraints on the timing of the breakup of ancient supercontinents. The majority of...
Linkages between hydrology and seasonal variations of nutrients and periphyton in a large oligotrophic subalpine lake
Ramon C. Naranjo, Richard G. Niswonger, David Smith, Donald O. Rosenberry, Sudeep Chandra
Richard G. Niswonger, David Smith, Donald O. Rosenberry, Sudeep Chandra, editor(s)
2019, Journal of Hydrology (568) 877-890
Periphyton is important to lake ecosystems, contributing to primary production, nutrient cycling, and benthic metabolism. Increases in periphyton growth in lakes can be indicative of changes in water quality, shifts in ecosystem structure, and increases in nutrient fluxes. In oligotrophic lakes, conservationists are interested in characterizing the influence of hydrological...
Long-term streamflow trends in Hawai‘i and implications for native stream fauna
H. M. Clilverd, Y.-P. Tsang, D. M. Infante, Abigail Lynch, A. M. Strauch
2019, Hydrological Processes (33) 699-719
Climate change has fundamentally altered the water cycle in tropical islands, which is a critical driver of freshwater ecosystems. To examine how changes in streamflow regime have impacted habitat quality for native migratory aquatic species, we present a 50‐year (1967–2016) analysis of hydrologic records in 23...
Petroleum systems framework of significant new oil discoveries in a giant Cretaceous (Aptian–Cenomanian) clinothem in Arctic Alaska
David W. Houseknecht
2019, American Association of Petroleum Geologists Bulletin (103) 619-652
Recent oil discoveries in an Aptian–Cenomanian clinothem in Arctic Alaska demonstrate the potential for hundred-million- to billion-barrel oil accumulations in Nanushuk Formation topsets and Torok Formation foresets–bottomsets. Oil-prone source rocks and the clinothem are draped across the Barrow arch, a structural hinge between the Colville foreland basin and Beaufort Sea...
An analysis of autocorrelation and bias in home range estimation
Michael T. Noonan, Marlee A. Tucker, Christen H. Fleming, Thomas S. Akre, Susan C Alberts, Abdullahi H. Ali, Jeanne Altmann, Pamela Castro Antunes, Jerrold L. Belant, Dean Beyer, Niels Blaum, Katrin Bohning-Gaese, Larry Cullen, Rogerio Cunha de Paula, Jasia Dekker, Jonathan Drescher-Lehman, Nina Farwig, Claudia Fichtel, Christina Fischer, Adam T. Ford, Jacob R. Goheen, Rene Janssen, Florian Jeltsch, Matthew Kauffman, Peter M. Kappeler, Flavia Koch, Scott LaPoint, A. Catherine Markham, Emilia Patricia Medici, Ronaldo G. Morato, Ran Nathan, Luiz G. R. Oliveira-Santos, Kirk A. Olson, Bruce D. Patterson, Agustin Paviolo, Emiliano Esterci Ramalho, Sascha Rosner, Dana G. Schabo, Nuria Selva, Agnieszka Sergiel, Marina Xavier da Silva, Orr Spiegel, Peter C. Thompson, Wiebke Ullmann, Filip Zieba, Tomasz Zwijacz-Kozica, William F. Fagan, Thomas Mueller, J.M. Calabrese
2019, Ecological Monographs (89)
Home range estimation is routine practice in ecological research. While advances in animal tracking technology have increased our capacity to collect data to support home range analysis, these same advances have also resulted in increasingly autocorrelated data. Consequently, the question of which home range estimator to use on modern, highly...
Functional and geographic components of risk for climate sensitive vertebrates in the Pacific Northwest, USA
Meryl Mims, Deanna H. Olson, David S. Pilliod, Jason B. Dunham
2019, Biological Conservation (228) 183-194
Rarity and life history traits inform multiple dimensions of intrinsic risk to climate and environmental change and can help systematically identify at-risk species. We quantified relative geographic rarity (area of occupancy), climate niche breadth, and life history traits for 114 freshwater fishes, amphibians, and reptiles in the U.S. Pacific Northwest....
Characterization of groundwater resources in the Chequamegon-Nicolet National Forest, Wisconsin: Medford Unit
Ken Bradbury, Stephen Mauel, Peter R. Schoephoester, Anna Fehling, Andrew T. Leaf, Paul Juckem, Randall Hunt, Aaron Pruitt
2019, Report, Technical Report
No abstract available....
Genetic swamping and species collapse: Tracking introgression between the native Candy Darter and introduced Variegate Darter
Isaac Gibson, Amy B. Welsh, Stuart A. Welsh, Daniel A. Cincotta
2019, Conservation Genetics (20) 287-298
Candy Darters (Etheostoma osburni) and Variegate Darters (E. variatum) are both native to West Virginia and Virginia. The geographic ranges of these two species were historically separated by Kanawha Falls, a natural barrier to fish dispersal located at Glen Ferris, WV. In the early 1980s, Variegate Darters or putative hybrids...
Controls on organic matter distributions in Eocene Lake Uinta, Utah and Colorado
Ronald C. Johnson, Tracey J. Mercier, Justin E. Birdwell
2019, Mountain Geologist (55) 177-216
The Green River Formation deposited in Eocene Lake Uinta in the Uinta and Piceance Basins, Utah and Colorado, contains the largest oil shale resource in the world with an estimated 1.53 trillion barrels of oil in-place in the Piceance Basin and 1.32 trillion barrels in the Uinta Basin. The Douglas...
Clarifying regional hydrologic controls of the Marañón River, Peru through rapid assessment to inform system-wide basin planning approaches
Alice F. Hill, Robert Stallard, Karl Rittger
2019, Elementa: Science of the anthropocene (6)
We use remote sensing to enhance the interpretation of the first baseline dataset of hydrologic, isotopic and hydrochemical variables spanning 620 km of the upper Marañón River, in Andean Peru, from the steep alpine canyons to the lower lying jungle. Remote, data-scarce river systems are under increased hydropower...
Controls of the spatial variability of denitrification potential in nontidal floodplains of the Chesapeake Bay watershed, USA
Alicia R. Korol, Gregory E. Noe, Changwoo Ahn
2019, Geoderma (338) 14-29
Identifying floodplains with high rates of denitrification will help prioritize restoration projects for the removal of nitrogen. Currently, relationships of denitrification with hydrogeomorphic, physiographic, and climate (i.e., largescale) characteristics of floodplains are relatively unknown, even though these characteristics have datasets (e.g., geographic mapping tools) that are publicly available (or soon-to-become) that could be used to understand denitrification...
Comparison of attraction, entrance and passage of downstream migrant American eels (Anguilla rostrata) through airlift and siphon deep entrance bypass systems
Nicola Baker, Alexander Haro, Barnaby J. Watten, John Noreika, Jonathan D. Bolland
2019, Ecological Engineering (126) 74-82
Downstream migrating anguillid eels face many barriers including turbines and pumps at impoundments for water abstraction, power generation and water level control, when attempting to exit the freshwater catchment to reach spawning grounds. Multiple eel species worldwide are facing different levels of endangerment and alleviating the...
Responses of biological soil crusts to rehabilitation strategies
Taylor Chock, Anita J. Antoninka, Akasha M. Faist, Matthew A. Bowker, Jayne Belnap, Nichole N. Barger
2019, Journal of Arid Environments (163) 77-85
Biological soil crusts (biocrusts) are common to dryland ecosystems and can influence a broad suite of soil ecological functions including stability and surface hydrology. Due to long recovery times following disturbance, there is a clear need for rehabilitation strategies to enhance the recovery of biocrust communities. Essential to biocrust recovery...
Measuring carbon and nitrogen bioassimilation, burial, and denitrification contributions of oyster reefs in Gulf coast estuaries
P. Westbrook, L. Heffner, Megan K. La Peyre
2019, Marine Biology (166)
The eastern oyster (Crassostrea virginica) and the reefs they create provide significant ecosystem services. This study measured their possible role in nutrient mitigation through bioassimilation, burial, and oyster-mediated sediment denitrification in near-shore shallow water (< 1 m water depth) and deep-water (> 1 m water depth) oyster reefs in Louisiana. Nitrogen (N) and carbon...
Radium accumulation in carbonate river sediments at oil and gas produced water discharges: Implications for beneficial use as disposal management
Bonnie McDevitt, Molly McLaughlin, Charles A. Cravotta III, Moses A Ajemigbitse, Katherine J. Van Sice, Jens Blotevogel, Thomas Borch, Nathaniel R. Warner
2019, Environmental Science (21) 324-338
In the western U.S., produced water from oil and gas wells discharged to surface water augments downstream supplies used for irrigation and livestock watering. Here we investigate six permitted discharges on three neighboring tributary systems in Wyoming. During 2013-16, we evaluated radium activities of the permitted discharges and the...
Chesapeake Bay impact structure—Development of "brim" sedimentation in a multilayered marine target
Henning Dypvik, Gregory Gohn, Lucy Edwards, J. Wright Horton, Jr., David Powars, Ronald Litwin
2019, Book chapter, Chesapeake Bay impact structure—Development of brim sedimentation in a multilayered marine target
The late Eocene Chesapeake Bay impact structure was formed in a multilayered target of seawater underlain sequentially by a sediment layer and a rock layer in a continental-shelf environment. Impact effects in the “brim” (annular trough) surrounding and adjacent to the transient crater, between the transient crater rim and the...
Modelling effects of invasive species and drought on crayfish extinction risk and population dynamics
Allyson N. Yarra, Daniel D. Magoulick
2019, Aquatic Conservation: Marine and Freshwater Ecosystems (29) 1-11
Hydrological alteration, which may be exacerbated by climate change, is known to facilitate aquatic species invasion. Altered hydrology, invasive species, and the additive effects of these stressors pose a threat to aquatic biodiversity.Understanding extinction risk in the context of these stressors is crucial for prioritizing conservation efforts. As case...
Optimal spatial allocation of control effort to manage invasives in the face of imperfect detection and misclassification
Mathieu Bonneau, Julien Martin, Nathalie Peyrard, LeRoy Rodgers, Christina M. Romagosa, Fred A. Johnson
2019, Ecological Modelling (392) 108-116
Imperfect detection and misclassification errors are often ignored in the context of invasive species management. Here we present an approach that combines spatially explicit models and an optimization technique to design optimal search and destroy strategies based on noisy monitoring observations. We focus on two invasive plants, melaleuca (Melaleuca quinquenervia)...
C–O stable isotope geochemistry and 40Ar/39Ar geochronology of the Bear Lodge carbonatite stockwork, Wyoming, USA
Allen K. Andersen, Peter B. Larson, Michael A. Cosca
2019, LITHOS (324-324) 640-660
The carbonatite dike swarm and vein stockwork at the center of the Paleogene Bear Lodge alkaline complex (BLAC), Wyoming, USA, is host to diverse REE mineral assemblages that are largely a result of subsolidus modification and REE redistribution. Pseudomorphic replacement of primary burbankite by an assemblage of ancylite, strontianite, and barite is the result of interaction with late-stage hydrothermal fluids that...
Overview of spirit microscopic imager results
Kenneth E. Herkenhoff, Steve W Squyres, Raymond E. Arvidson, Shoshanna B Cole, Rob Sullivan, Aileen Yingst, Nathalie Cabrol, Ella Lee, Janet Richie, Robert M. Sucharski, Fred J. Calef, James F. Bell III, Mary Chapman, Paul Geissler, Lauren A. Edgar, Brenda Franklin, Joel A. Hurowitz, Elsa Jensen, Jeffrey R. Johnson, Randolph L. Kirk, Peter Lanagan, Kevin Mullins, Craig Leff, Justin Maki, Bonnie L. Redding, Melissa Rice, Michael H. Sims, Annette Sunda, Nicole Spanovich, Richard Springer, Laurence A. Soderblom, Alicia Vaughan
2019, Journal of Geophysical Research E: Planets (124) 528-584
This paper provides an overview of Mars Exploration Rover Spirit Microscopic Imager (MI) operations and the calibration, processing, and analysis of MI data. The focus of this overview is on the last five Earth years (2005–2010) of Spirit's mission in Gusev crater, supplementing the previous overview of the first 450 sols of the Spirit MI...
Modeling White Sucker (Catostomus commersonii) populations to assess commercial harvest influence on age structure
Joseph D. Zydlewski, Meg Begley, Stephen Coghlan
2019, Journal of Freshwater Ecology (33) 413-428
Commercial harvest of White Suckers Catostomus commersonii for bait in the American Lobster Homarus americanus industry is minimally regulated in Maine and there are concerns as to the influence of increasing harvest. We built a population model using parameters (i.e. age-specific mortality, age at maturity, and size-specific fecundity) from literature...
Modelling effects of invasive species and drought on crayfish extinction risk and population dynamics
Allyson N. Yarra, Daniel D. Magoulick
2019, Aquatic Conservation: Marine and Freshwater Ecosystems (29) 1-11
Hydrological alteration, which may be exacerbated by climate change, is known to facilitate aquatic species invasion. Altered hydrology, invasive species, and the additive effects of these stressors pose a threat to aquatic biodiversity.Understanding extinction risk in the context of these stressors is crucial for prioritizing conservation efforts. As case...
Bioclimatic envelopes for individual demographic events driven by extremes: Plant mortality from drought and warming
Darin J. Law, Henry D. Adams, David D. Breshears, Neil S. Cobb, John B. Bradford, Chris B. Zou, Jason P. Field, Alfonso A. Gardea, A. Park Williams, Travis E. Huxman
2019, International Journal of Plant Sciences (80) 53-62
The occurrence of plant species across the globe is largely constrained by climate. Ecologists use plant-climate relationships such as bioclimatic envelopes and related niche models to determine potential environmental conditions promoting probable species occurrence. Traditionally bioclimatic envelopes either exclude disturbance explicitly, or only include disturbance as infrequent and smaller scale...
The extreme space weather event in September 1909
Hisashi Hayakawa, Yusuke Ebihara, Edward W. Cliver, Kentaro Hattori, Shin Toriumi, Jeffrey J. Love, Norio Umemura, Kosuke Namekata, Takahito Sakaue, Takuya Takahashi, Kazunari Shibata
2019, Monthly Notices of the Royal Astronomical Society (484) 4083-4099
We evaluate worldwide low-latitude auroral activity associated with the great magnetic storm of September 1909 for which a minimum Dst value of −595 nT has recently been determined. From auroral observations, we calculate that the equatorward boundary of the auroral oval in the 1909 event was in the range from 31°–35° invariant...
