An ANCOVA model for porosity and its uncertainty for oil reservoirs based on TORIS dataset
C. Ozgen Karacan
2019, Journal of Petroleum Science and Engineering
Porosity is one of the most important parameters to assess in-place oil or gas in reservoirs, and to evaluate recovery from enhanced production operations. Since it is relatively well-established to determine porosity using different laboratory and field methods, its value is usually determined at many locations across a reservoir...
Ecological effects of fear: How spatiotemporal heterogeneity in predation risk influences mule deer access to forage in a sky‐island system
Chris Lowrey, Kathleen Longshore, David M. Choate, Jyoteshwar R Nagol, Joseph O. Sexton, Daniel B. Thompson
2019, Ecology and Evolution (9) 7213-7226
Forage availability and predation risk interact to affect habitat use of ungulates across many biomes. Within sky‐island habitats of the Mojave Desert, increased availability of diverse forage and cover may provide ungulates with unique opportunities to extend nutrient uptake and/or to mitigate predation risk. We addressed whether habitat use and...
Migration triggers in a large herbivore: Galapagos giant tortoises navigating resources gradients on volcanoes
Guillaume Bastille-Rousseau, Charles B. Yackulic, James P. Gibbs, Jacqueline L. Friar, Freddy Cabrera, Stephen Blake
2019, Ecology (100)
To understand how migratory behavior evolved and to predict the future of migratory species in the face of global environmental change it is important to quantify intra- and inter-individual variation in migratory behavior. Intra-individual variation includes behavioral response to changing environmental conditions and hence behavioral plasticity in the context of...
Application of sediment end-member analysis for understanding sediment fluxes, northern Chandeleur Islands, Louisiana
Julie Bernier, Jennifer L. Miselis, Noreen A. Buster, James G. Flocks
2019, Conference Paper, Coastal Sediments 2019—Proceedings of the 9th International Conference
We analyzed grain-size distributions (GSDs) from a time-series of sediment samples to evaluate sediment transport following anthropogenic sand-berm emplacement at the northern Chandeleur Islands, Louisiana. End-member analysis (EMA) was applied to compare the end-member (EM) GSD of a known sediment source to GSDs from surrounding environments and characterize the physical...
Ground-motion residuals, path effects, and crustal properties: A pilot study in southern California
Valerie J. Sahakian, Annemarie S. Baltay Sundstrom, Thomas C. Hanks, Janine Bueler, Frank Vernon, Deborah L. Kilb, Norm A. Abrahamson
2019, Journal of Geophysical Research B: Solid Earth (124) 5738-5753
To improve models of ground motion estimation and probabilistic seismic hazard analyses, the engineering seismology field is moving toward developing fully nonergodic ground motion models, models specific for individual source‐to‐site paths. Previous work on this topic has examined systematic variations in ground‐motion along particular paths (from either recorded or simulated...
Toward a national coastal hazard forecast of total water levels
Alfredo Aretxabaleta, Kara S. Doran, Joseph W. Long, Li H. Erikson
2019, Conference Paper, Coastal sediments 2019: Proceedings of the 9th international conference
Storm surge and large waves combine to erode beaches, cause marsh and coral decay, and inundate low-elevation areas, resulting in hazards to coastal communities and loss of natural resources. The USGS, in collaboration with NOAA, is developing a real-time system to provide ∼ 6-day forecasts of total water levels (TWLs)...
Estimating connectivity of hard clam (Mercenaria mercenaria) and eastern oyster (Crassostrea virginica) larvae in Barnegat Bay
J.D. Goodwin, D.M. Munroe, Zafer Defne, Neil K. Ganju, James Vasslides
2019, Estuaries and Coasts (7)
Many marine organisms have a well-known adult sessile stage. Unfortunately, our lack of knowledge regarding their larval transient stage hinders our understanding of their basic ecology and connectivity. Larvae can have swimming behavior that influences their transport within the marine environment. Understanding the larval stage provides insight...
Assessment of site-specific agricultural Best Management Practices in the Upper East River watershed, Wisconsin, using a field-scale SWAT model
Katherine R. Merriman, Prasad Daggupati, Raghavan Srinivasan, Brett A. Hayhurst
2019, Journal of Great Lakes Research (3) 619-641
The Great Lakes “Priority Watershed” effort targeted the Upper East River watershed, a 116.5 km2 tributary watershed to Green Bay in Wisconsin, to reduce sediment and nutrients entering Green Bay. A Soil and Water Assessment Tool (SWAT) model was created to determine the effectiveness of Best Management Practices (BMPs) derived...
Recruitment dynamics and reproductive ecology of Blue Sucker in Texas, with a focus on the Big Bend region of the Rio Grande
Seiji Miyazono, Allison A. Pease, Timothy B. Grabowski, Sarah Fritts
2019, Cooperator Science Series CSS-134-2020
Blue Sucker Cycleptus elongatus is a state-listed threatened species in Texas and is considered vulnerable throughout its range. Once considered a single, wide-ranging species, blue suckers are now recognized as a complex of closely related, but genetically and morphologically distinct species within the genus Cycleptus, including an undescribed species within...
Spatio-temporal population change of Arctic-breeding waterbirds on the Arctic Coastal Plain of Alaska
Courtney L. Amundson, Paul L. Flint, Robert A Stehn, Robert Platte, Heather M. Wilson, William W. Larned, Julian B. Fischer
2019, Avian Conservation and Ecology (14)
Rapid physical changes that are occurring in the Arctic are primary drivers of landscape change and thus may drive population dynamics of Arctic-breeding birds. Despite the importance of this region to breeding and molting waterbirds, lack of a comprehensive analysis of historic data has hindered quantifying avian population change. We...
Constraining parameter uncertainty in modeling debris-flow initiation during the September 2013 Colorado Front Range storm
Rex L. Baum, C.R. Scheevel, Eric S. Jones
2019, Conference Paper, Debris-flow hazards mitigation: Mechanics, monitoring, modeling, and assessment; proceedings of the Seventh International Conference on Debris-Flow Hazards Mitigation, Golden, Colorado, USA, June 10-13, 2019
The occurrence of debris flows during the September 2013 northern Colorado floods took the emergency management community by surprise. The September 2013 debris flows in the Colorado Front Range initiated from shallow landslides in colluvium. Most occurred on south- and east-facing slopes on the walls of steep canyons in crystalline...
Discriminating among Pacific salmon, Rainbow Trout, and Atlantic Salmon species using common genetic screening methods
Christopher Habicht, Andrew Barclay, Heather A. Hoyt, Christian T. Smith, Keith N. Turnquist, Wesley Larson
2019, Journal of Fish and Wildlife Management (10) 228-240
The five most common species of Pacific salmon, Rainbow Trout (steelhead) Oncorhynchus spp., and Atlantic Salmon Salmo salar intermingle in the North Pacific Ocean and its freshwater tributaries. Efficient morphological methods for distinguishing among these species are sometimes limited by condition of the specimen (degraded or missing morphology), life...
Bayesian analysis of the impact of rainfall data product on simulated slope failure for North Carolina locations
Soni Yatheendradas, Dalia Kirschbaum, Grey Nearing, Jasper A. Vrugt, Rex L. Baum, Rick Wooten, Ning Lu, Jonathan W. Godt
2019, Computational Geosciences (23) 495-522
In the past decades, many different approaches have been developed in the literature to quantify the load-carrying capacity and geotechnical stability (or the Factor of Safety, F_s) of variably saturated hillslopes. Much of this work has focused on a deterministic characterization of hillslope stability. Yet, simulated F_s values are subject...
USGS combats invasive species through citizen science
Wesley Daniel
2019, Newsletter
No abstract available....
Earthquake-induced chains of geologic hazards: Patterns, mechanisms, and impacts
Xuanmei Fan, Gianvito Scaringi, Oliver Korup, A. Joshua West, Cees J. van Westen, Hakan Tanyas, Niels Hovius, Tristram C Hales, Randall W. Jibson, Kate E. Allstadt, Limin Zhang, Stephen G. Evans, Chong Xu, Li, Xiangjun Pei, Qiang Xu, Runqiu Huang
2019, Reviews of Geophysics (57) 421-503
Large earthquakes initiate chains of surface processes that last much longer than the brief moments of strong shaking. Most moderate- and large-magnitude earthquakes trigger landslides, ranging from small failures in the soil cover to massive, devastating rock avalanches. Some landslides dam rivers and impound lakes, which can collapse days to...
Report on the workshop 'Global modelling of biodiversity and ecosystem services'
Sana Okayasu, Machteld Schoolenberg, Eefje den Belder, Ghassen Halouani, HyeJin Kim, Brian W. Miller
2019, Report
A three-day workshop on ‘Global Modelling of Biodiversity and Ecosystem Services’, was held in the Hague, Netherlands, from 24th to 26th June 2019. The workshop, attended by 35 modelling and scenario-building experts, was organised on behalf of the former IPBES1 expert group on scenarios and models of the first IPBES...
Salmon, forage fish, and kelp
Anne Shaffer, Dave Parks, Erik R. Schoen, David Beauchamp
2019, Frontiers in Ecology and the Environment (17) 258-258
Kelp beds are prominent features of northeast Pacific coastlines. They are seasonal in nature, as are the communities that use them. Here, juvenile and adult Chinook salmon (Oncorhynchus tshawytscha) – key components of northeast Pacific marine food webs that link plankton and forage fishes to endangered killer whales – have...
Modeling ash dispersal from future eruptions of Taupo supervolcano
Simon J Barker, Alexa R. Van Eaton, Larry G. Mastin, Colin JN Wilson, Mary Anne Thompson, Tom M Wilson, Cory Davis, James A Renwick
2019, Geochemistry, Geophysics, Geosystems (20) 3375-3401
Hazard analysis at caldera volcanoes is challenging due to the wide range of eruptive and environmental conditions that can plausibly occur during renewed activity. Taupo volcano, New Zealand, is a frequently active and productive rhyolitic caldera volcano that has hosted the world's youngest known supereruption and...
Comparison of beaver density estimates from aerial surveys of waterways versus transects
Shannon Barber-Meyer
2019, Canadian Wildlife Biology and Management (8) 9-16
Historic beaver-sign (Castor canadensis) survey flights were often conducted over waterways to maximize beaver detections. However, densities determined from strip transect surveys are more useful to compare across and within study areas than waterway indices based on observations per distance flown because transects are more representative of the wider landscape....
Wild canid distribution and co-existence in a natural–urban matrix of the Pioneer Valley of Western Massachusetts
Eric G. LeFlore, Todd K. Fuller, John T. Finn, John F. Organ, Stephen DeStefano
2019, Northeastern Naturalist (26) 325-342
Although development and urbanization are typically believed to have negative impacts on carnivoran species, some species can successfully navigate an urban matrix. Sympatric carnivorans compete for limited resources in urban areas, likely with system-specific impacts to their distributions and activity patterns. We used automatically triggered wildlife cameras to assess the...
Monitoring five-needle pine on Bureau of Land Management lands in Wyoming summary report for 2013, 2014, 2016, 2017
Erin Shanahan, Kristin Legg, Rob Daley, Kathryn Irvine, Siri Wilmoth, Joshua Jackson
2019, Report
Whitebark pine (Pinus albicaulis) grows at high elevations and in subalpine communities in the Pacific Northwest and Northern Rocky Mountains. Limber pine (Pinus flexilis) occurs in western North America across a broad elevational gradient from the Canadian Rocky Mountains into parts of New Mexico and Arizona and from southern California...
Surrogate model development for coastal dune erosion under storm conditions
Victor Malagon-Santos, Thomas Wahl, Joseph W Long, Davina Passeri, Nathaniel G. Plant
2019, Conference Paper, Proceedings of the 9th Coastal Sediments Conference
Early coastal dune erosion predictions are essential to avoid potential flood consequences but most dune erosion numerical models are computationally expensive, hence their application in Early Warning Systems is limited. Here, based on a combination of optimally sampled synthetic sea storms with a calibrated and validated XBeach model, we develop...
Late Quaternary vegetation development following deglaciation of northwestern Alexander Archipelago, Alaska
Thomas A. Ager
2019, Frontiers in Earth Science (7) 1-25
The Cordilleran Ice sheet covered most of southeastern Alaska during the Last Glacial Interval (LGI: Marine Isotope Stage 2). Ice began to recede from western Alexander Archipelago ~17,000 + 700 yr BP. In this study pollen analysis and radiocarbon dating of three sediment cores were used to reconstruct, for...
Handbook to the partners in flight population estimates database, version 3.0
Tom Will, Jessica C. Stanton, Kenneth V. Rosenberg, Arvind O. Panjabi, Alaine Camfield, Allison Shaw, Wayne E. Thogmartin, Peter J. Blancher
2019, Partners in Flight Technical Publication 7
This document describes the content of Version 3.0 of the Partners in Flight (PIF) Population Estimates Database, which provides population estimates for breeding USA/Canada landbirds at several geographic scales following the Partners in Flight approach described initially in Rich et al. (2004) and by Rosenberg and Blancher (2005) and most...
Using a GIS to populate 3D geocellular geologic models
Donald S. Sweetkind, Geoffrey Cromwell
2019, Conference Paper, Geologic Mapping Forum 2019 Abstracts
No abstract available...
