Spatial and temporal variation in river corridor exchange across a 5th order mountain stream network
Adam S Ward, Steven Wondzell, Noah M. Schmadel, Skuyler Herzog, Jay P. Zarnetske, Viktor Baranov, Phillip J Blaen, Nicolai Brekenfeld, Rosalie Chu, Romain Derelle, Jennifer D. Drummond, Jan Fleckenstein, Vanessa Garayburu-Caruso, Emily B. Graham, David Hannah, Ciaran Harman, Jase Hixson, Julia L.A. Knapp, Stefan Krause, Marie Kurz, Jorg Lewandowski, Angang Li, Eugènia Martí, Melinda Miller, Alexander Milner, Kerry Neil, Luisa Orsini, Aaron I. Packman, Stephen Plont, Lupita Renteria, Kevin Roche, Todd V Royer, Catalina Segura, James Stegen, Jason Toyoda, Jacqueline Wells, Nathan Wisnoski
2019, Hydrology and Earth System Sciences (23) 5199-5225
Although most field and modeling studies of river corridor exchange have been conducted a scales ranging from 10’s to 100’s of meters; results of these studies are used to predict their ecological and hydrological influences at the scale of river networks. Further complicating prediction, exchanges are expected to vary with...
The effects of management practices on grassland birds—Eastern Meadowlark (Sturnella magna)
Scott D. Hull, Jill A. Shaffer, Lawrence D. Igl
2019, Professional Paper 1842-MM
The key to Eastern Meadowlark (Sturnella magna) management is providing large areas of contiguous grassland of moderate height with significant grass cover and moderate forb density. Eastern Meadowlarks have been reported to use habitats with 10–187 centimeters (cm) average vegetation height, 6–88 cm visual obstruction reading, 53–86 percent grass cover,...
Regression models for estimating sediment and nutrient concentrations and loads at the Iroquois River near Foresman, Indiana, March 2015 through July 2018
Timothy R. Lathrop, Aubrey R. Bunch, Myles S. Downhour, Daniel M. Perkins
2019, Scientific Investigations Report 2019-5087
In 2015, the U.S. Geological Survey, in cooperation with the Iroquois River Conservancy District, deployed continuous water-quality monitors and began collecting representative discrete water-quality samples at the Iroquois River near Foresman, Indiana, streamflow-gaging station (U.S. Geological Survey station 05524500). By relating continuously monitored water-quality data and discrete water-quality samples collected...
Predicting fish species richness and habitat relationships using Bayesian hierarchical multispecies occupancy models
Shannon White, Evan Faulk, Caleb Tzilkowski, Andrew Weber, Matt Marshall, Tyler Wagner
2019, Canadian Journal Fisheries and Aquatic Sciences (77)
Understanding how stream fishes respond to changes in habitat availability is complicated by low occurrence rates of many species, which in turn reduces the ability to quantify species–habitat relationships and account for imperfect detection in estimates of species richness. Multispecies occupancy models have been used sparingly in the analysis of...
Estimating sightability of greater sage-grouse at leks using an aerial infrared system and N-mixture models
Peter S. Coates, Gregory T. Wann, Gifford L. Gillette, Mark A. Ricca, Brian G. Prochazka, John P. Severson, Katie M. Andrle, Shawn P. Espinosa, Michael L. Casazza, David J. Delehanty
2019, Wildlife Biology (2019)
Counts of grouse present at leks (breeding grounds) during spring are widely used to monitor population numbers and assess trends. However, only a proportion of birds available to count are detected resulting in a biased population index. We designed a study using an aerial integrated infrared imaging system (AIRIS) and...
Prediction and inference of flow-duration curves using multi-output neural networks
Scott C. Worland, Scott Steinschneider, William H. Asquith, Rodney Knight, Michael E. Wieczorek
2019, Water Resources Research (55) 6850-6868
We develop multi-output neural network models (MNNs) to predict flow-duration curves (FDCs) in 9,203 ungaged locations in the Southeastern United States for six decades between 1950-2009. The model architecture contains multiple response variables in the output layer that correspond to individual quantiles along the FDC. During training, predictions are made...
A multidisciplinary coastal vulnerability assessment for local government focused on ecosystems, Santa Barbara area, California
Monique Myers, Patrick L. Barnard, Edward Beighley, Daniel R. Cayan, Jenifer E. Dugan, Dongmei Feng, Samuel F. Iacobellis, John M. Melack, Henry M. Page
2019, Ocean and Coastal Management (182)
Incorporating coastal ecosystems in climate adaptation planning is needed to maintain the well-being of both natural and human systems. Our vulnerability study uses a multidisciplinary approach to evaluate climate change vulnerability of an urbanized coastal community that could serve as a model approach for communities worldwide, particularly in similar Mediterranean...
A spatio-contextual probabilistic model for extracting linear features in hilly terrain from high-resolution DEM data
Xiran Zhou, Wenwen Li, Samantha T. Arundel
2019, International Journal of Geographical Information Science (33) 666-686
This paper introduces our research in developing a probabilistic model to extract linear terrain features from high resolution DEM (Digital Elevation Model) data. The proposed model takes full advantage of spatio-contextual information to characterize terrain changes. It first derives a quantifiable measure of spatio-contextual patterns of linear terrain feature, such...
Modeling sediment bypassing around idealized rocky headlands
Douglas A. George, John L. Largier, Greg B. Pasternack, Patrick L. Barnard, Curt D. Storlazzi, Li H. Erikson
2019, Journal of Marine Science and Engineering (7)
Alongshore sediment bypassing rocky headlands remains understudied despite the importance of characterizing littoral processes for erosion abatement, beach management, and climate change adaptation. To address this gap, a numerical model sediment transport study was developed to identify controlling factors and mechanisms for sediment headland bypassing potential. Four idealized headlands were...
Regionalization of groundwater residence time using metamodeling
J. Jeffrey Starn, Kenneth Belitz
2019, Water Resources Research (54) 6357-6373
Groundwater residence-time distributions (RTDs) are critical for assessing susceptibility of water resources to degradation. A novel combination of numerical modeling and statistical methods allows estimation of regional RTDs with unprecedented speed. In this method, particle RTDs are generated in 30 type locales in the northeastern glaciated U.S using automated...
Genomic pedigree reconstruction identifies predictors of mating and reproductive success in an invasive vertebrate
Brenna A Levine, Marlis R Douglas, Amy A. Yackel Adams, Bjorn Lardner, Robert Reed, Julie A. Savidge, Michael E Douglas
2019, Ecology and Evolution (9) 11863-11877
The persistence of an invasive species is influenced by its reproductive ecology, and a successful control program must operate on this premise. However, the reproductive ecology of invasive species may be enigmatic due to factors that also limit their management, such as cryptic coloration and behavior. We explored the mating...
In vitro immune function in laboratory-reared age-0 smallmouth bass (Micropterus dolomieu) relative to diet
Christopher Ottinger, Cheyenne R. Smith, Vicki S. Blazer
2019, Fish & Shellfish Immunology (95) 1-10
Smallmouth bass (Micropterus dolomieu) are used as an indicator species in environmental monitoring and assessment studies. However, laboratory-based studies for methods development and effector assessment are limited for this species. Nutrition, a known modulator of teleost physiological responses including immune function, is a critical knowledge-gap sometimes overlooked in the design...
Landscape genetics reveals unique and shared effects of urbanization for two sympatric pool-breeding amphibians
Jared J. Homola, Cynthia S. Loftin, Michael T. Kinnison
2019, Ecology and Evolution (9) 11799-11823
Metapopulation-structured species can be negatively affected when landscape fragmentation impairs connectivity. We investigated the effects of urbanization on genetic diversity and gene flow for two sympatric amphibian species, spotted salamanders (Ambystoma maculatum) and wood frogs (Lithobates sylvaticus), across a large (>35,000 km2) landscape in Maine, USA, containing numerous natural and...
Burial history reconstruction of the Appalachian Basin in Kentucky, West Virginia, Ohio, Pennsylvania, and New York, using 1D petroleum system models
Debra K. Higley, Catherine B. Enomoto
2019, Mountain Geologist (56) 365-396
Nine 1D burial history models were built across the Appalachian Basin to reconstruct the burial, erosional, and thermal maturation histories of contained petroleum source rocks. Models were calibrated to measured downhole temperature and to vitrinite reflectance (% Ro) data from Devonian through Pennsylvanian petroleum source rocks. The highest levels...
Spatial fingerprinting of biogenic and anthropogenic volatile organic compounds in an arid unsaturated zone
Christopher Green, Wentai Luo, Christopher H. Conaway, Karl B. Haase, Ronald J. Baker, Brian J. Andraski
2019, Vadose Zone Journal (18)
Subsurface volatile organic compounds (VOCs) can pose risks to human and environmental health and mediate biological processes. VOCs have both anthropogenic and biogenic origins, but the relative importance of these sources has not been explored in subsurface environments. This study synthesizes 17 years of VOC data from the Amargosa Desert...
Wetland biomass and productivity in Coastal Louisiana: Base line data (1976-2015) and knowledge gaps for the development of spatially explicit models for ecosystem restoration and rehabilitation initiatives
Victor H. Rivera-Monroy, Courtney Elliton, Siddhartha Narra, Ehab Meselhe, Xiaochen Zhao, Eric White, Charles E. Sasser, Jenneke M. Visser, X. Meng, Hongqing Wang, Zuo Xue, Fernando Jaramillo
2019, Water (11)
Coastal Louisiana host 37% of the coastal wetland area in the conterminous US, including one of the deltaic coastal regions more susceptible to the synergy of human and natural impacts causing wetland loss. As a result of the construction of flood protection infrastructure, dredging of channels across wetlands for oil/gas...
Seasonal, spring-neap, and tidal variation in cohesive sediment transport parameters in estuarine shallows
Rachel Allen, Jessica R. Lacy, Mark T. Stacey, Evan A Variano
2019, Journal of Geophysical Research: Oceans (124) 7265-7284
Numerical models for predicting sediment concentrations and transport rely on parameters such as settling velocity and bed erodibility that describe sediment characteristics, yet these parameters are rarely probed directly. We investigated temporal and spatial variation in sediment parameters in the shallows of San Pablo Bay, CA. Flow, turbulence, and suspended...
Monitoring, forecasting collapse events, and mapping pyroclastic deposits at Sinabung volcano with satellite imagery
John S. Pallister, Rick Wessels, Julia P. Griswold, Wendy A. McCausland, Nugraha Kartadinata, Hendra Gunawan, Agus Budianto, Sofyan Primulyana
2019, Journal of Volcanology and Geothermal Research (382) 149-163
During the ongoing (2013–present) eruption of Sinabung volcano, north Sumatra, we have routinely used a variety of satellite remote sensing data to observe and forecast lava dome and lava flow collapse events, to map the resulting pyroclastic deposits, and to estimate effusion rates. In this paper, we focus on the first two years of the current eruption...
Formation pressure and fluid flow measurements in marine gas hydrate reservoirs, NGHP-02 expedition, offshore India
Pushpendra Kumar, Timothy S. Collett, U.S. Yadav, Juli Singh
2019, Journal of Marine and Petroleum Geology (108) 609-618
Open Hole Modular Dynamic Testing (MDT) measurements were conducted in a gas hydrate-bearing sand-rich reservoir offshore India during the National Gas Hydrate Program 02 (NGHP-02) Expedition. The primary goal of this test was to obtain effective reservoir petrophysical properties in the presence of gas hydrates. The test plan included a...
India National Gas Hydrate Program Expedition-02: Operational and technical summary
Pushpendra Kumar, Timothy S. Collett, K. M. Shukla, U. S. Yadav, M. V. Lall, Krishna Vishwanath
2019, Journal of Marine and Petroleum Geology (108) 3-38
The India National Gas Hydrate Program is being steered by the government of India's Ministry of Petroleum and Natural Gas (MoPNG) with participation of Directorate General of Hydrocarbons (DGH), Oil and Natural Gas Corporation Limited (ONGC), and the National Oil Companies and Research Institutes of India. The India National Gas...
National Gas Hydrate Program expedition 02: Identification of gas hydrate prospects in the Krishna-Godavari Basin, offshore India
K.M. Shukla, U.S. Yadav, Pushpendra Kumar, Timothy Collett, R. Boswell, M. Frye, M. Riedel, I. Kaurf, K. Vishwanathf
2019, Journal of Marine and Petroleum Geology (108) 167-184
After completing the first expedition of India's National Gas Hydrate Program (NGHP-01) in 2006, it was concluded that for the next expedition (National Gas Hydrate Program 02; NGHP-02), a new drill site review effort should focus on identifying potential deep-water offshore gas hydrate accumulations in sand dominated depositional environments. Therefore,...
Numerical simulations of depressurization-induced gas production from an interbedded turbidite gas hydrate-bearing sedimentary section in the offshore India: Site NGHP-02-16 (Area-B)
Evgeniy M. Myshakin, Yongkoo Seol, Jeen-Shang Lin, Shun Uchida, Timothy Collett, Ray Boswell
2019, Journal of Marine and Petroleum Geology (108) 619-638
The recent National Gas Hydrate Program Expedition 02 (NGHP-02) identified the existence of gas hydrate-bearing sand reservoirs at a number of sites in the offshore of India including Site NGHP-02-16 in Area-B of the Krishna-Godavari Basin. The architecture of that gas hydrate accumulation is characterized by thin, gas hydrate-bearing, high...
India National Gas Hydrate Program Expedition 02 summary of scientific results: Numerical simulation of reservoir response to depressurization
Ray Boswell, Evgeniy Myshakin, George Moridis, Yoshihiro Konno, Timothy S. Collett, Matthew Reagan, Taiwo Ajayi, Yongkoo Seol
2019, Journal of Marine and Petroleum Geology (108) 154-166
The India National Gas Hydrate Program Expedition 02 (NGHP-02) discovered gas hydrate at high saturation in sand reservoirs at several sites in the deepwater Bay of Bengal. To assess the potential response of those deposits to scientific depressurization experiments, comprehensive geologic models were constructed to enable numerical simulation for...
Discrete Zr and REE mineralization of the Baerzhe rare-metal deposit, China
Kunfeng Qiu, Haocheng Yu, Mingqian Wu, Jianzhen Geng, Xiangkun Ge, Zongyang Gou, Ryan D. Taylor
2019, American Mineralogist (104) 1487-1502
Although REE (lanthanides + Y) mineralization in alkaline silicate systems is commonly accompanied with Zr mineralization worldwide, our understanding of the relationship between Zr and REE mineralization is still incomplete (e.g. Škoda and Novák, 2007; Linnen et al., 2014; Petrella et al., 2014; Möller and Williams-Jones, 2016; Wu et al.,...
Ensembles of ETAS models provide optimal operational earthquake forecasting during swarms: Insights from the 2015 San Ramon, California swarm
Andrea L. Llenos, Andrew J. Michael
2019, Bulletin of the Seismological Society of America (109) 2145-2158
Earthquake swarms, typically modeled as time-varying changes in background seismicity that are driven by external processes such as fluid flow or aseismic creep, present challenges for operational earthquake forecasting. While the time decay of aftershock sequences can be estimated with the modified Omori law, it is difficult to forecast...
