Hydrous heating experiments at 130°C yield insights into the occurrence of hydrogen sulfide and light alkanes in natural gas reservoirs
M.A. Alrowaie, Aaron M. Jubb, A. Schimmelmann, M. Mastalerz, L.M. Pratt
2019, Organic Geochemistry (137)
Improved understanding of the origin of produced volatiles from conventional reservoirs and unconventional source rocks is critical for petroleum exploration and production. A series of hydrous heating experiments using two immature Type II siliciclastic source rocks, Pennsylvanian Turner Mine shale (TMS) and Devonian New Albany Shale (NAS), at 130 °C...
Fire severity and changing composition of forest understory plant communities
Jens Stevens, Jesse Miller, Paula J. Fornwalt
2019, Journal of Vegetation Science (30) 1099-1109
QuestionsGradients of fire severity in dry conifer forests can be associated with variation in understory floristic composition. Recent work in dry conifer forests in California, USA, has suggested that more severely burned stands contain more thermophilic taxa (those associated with warmer and drier conditions), and that forest...
Introduction to special issue on gas hydrate in porous media: Linking laboratory and field‐scale phenomena
Carolyn D. Ruppel, Joo Yong Lee, Ingo Pecher
2019, Journal of Geophysical Research B: Solid Earth (124) 7525-7537
The proliferation of drilling expeditions focused on characterizing natural gas hydrate as a potential energy resource has spawned widespread interest in gas hydrate reservoir properties and associated porous media phenomena. Between 2017 and 2019, a Special Section of this journal compiled contributed papers elucidating interactions between gas hydrate and sediment...
Identifying changing precipitation extremes in Sub-Saharan Africa with gauge and satellite products
Laura Harrison, Chris Funk, Pete Peterson
2019, Environmental Research Letters (14)
Sparse gauge networks in Sub-Saharan Africa limit our ability to identify changing precipitation extremes with in situ observations. Given the potential for satellite and satellite-gauge precipitation products to help, we investigate how daily gridded gauge and satellite products compare for seven core climate change precipitation indices. According to a new...
See how they ran: Morphological and functional aspects of skeletons from ancient Egyptian shrew mummies (Eulipotyphla: Soricidae: Crocidurinae)
Neal Woodman, Alec T. Wilken, Salima Ikram
2019, Journal of Mammalogy (100) 1199-1210
Animals served important roles in the religious cults that proliferated during the Late (ca. 747–332 BCE) and Greco-Roman periods (332 BCE–CE 337) of ancient Egypt. One result was the interment of animal mummies in specialized necropolises distributed throughout the country. Excavation of a rock-tomb that was re-used during the Ptolemaic...
Three-layered silver nanoparticles to trace dissolution and association to a green alga
Dominic Ponton, Marie Noele Croteau, Samuel N Luoma, Sahar Pourhoseini, Ruth Merrifield, Jamie Lead
2019, Nanotoxicology (13) 1149-1160
Core-shell silver nanoparticles (NPs) consisting of an inner Ag core and successive layers of Au and Ag (Ag@Au@Ag) were used to measure the simultaneous association of Ag NPs and ionic Ag by the green alga Chlamydomonas (C.) reinhardtii. Dissolution of the inner Ag core was prevented by a gold (Au)...
Using a Bayesian network to understand the importance of coastal storms and undeveloped landscapes for the creation and maintenance of early successional habitat
Sara L. Zeigler, Benjamin T. Gutierrez, Emily J. Sturdivant, Daniel H. Catlin, James D. Fraser, A. Hecht, Sarah M. Karpanty, Nathaniel G. Plant, E. Robert Thieler
2019, PLoS ONE (14)
Coastal storms have consequences for human lives and infrastructure but also create important early successional habitats for myriad species. For example, storm-induced overwash creates nesting habitat for shorebirds like piping plovers (Charadrius melodus). We examined how piping plover habitat extent and location changed on barrier islands in New York, New...
Climate vulnerability assessment for Pacific salmon and steelhead in the California Current Large Marine Ecosystem
Lisa G Crozier, Michelle M McClure, Tim J. Beechie, Steven J. Bograd, David A. Boughton, Mark H. Carr, Thomas D. Cooney, Jason B. Dunham, Correigh M. Greene, Melissa A Haltuch, Elliott L. Hazen, Damon M Holzer, David D. Huff, Rachel C. Johnson, Chris E Jordan, Issac C Kaplan, Steven T Lindley, Nathan J Mantua, Peter B. Moyle, James M Myers, Mark W Nelson, Brian C Spence, Laurie A. Weitkamp, Thomas H. Williams, Ellen Willis-Norton
2019, PLoS ONE (14)
Major ecological realignments are already occurring in response to climate change. To be successful, conservation strategies now need to account for geographical patterns in traits sensitive to climate change, as well as climate threats to species-level diversity. As part of an effort to provide such information, we conducted...
Movement and mortality of Atlantic salmonkelts (Salmo salar) released into thePenobscot River, Maine
George A. Maynard, Lisa K. Izzo, Joseph D. Zydlewski
2019, Fishery Bulletin (116) 281-290
The Penobscot River is home to the last major run of Atlantic salmon (Salmo salar) in the United States. For over one century, the river has been stocked intensively. Since the late 1970s, most kelts are released to the Penobscot River estuary following spawning in a hatchery. Over that time,...
Seismic loss and damage in light-frame wood buildings from sequences of induced earthquakes
Robert E Chase, Abbie B. Liel, Nico Luco, Bridger W Baird
2019, Earthquake Engineering and Structural Dynamics (48) 1365-1383
Activities related to oil and gas production, especially deep disposal of wastewater, have led to sequences of induced earthquakes in the central U.S. This study aims to quantify damage to and seismic losses for light-frame wood buildings when subjected to sequences of induced, small to moderate magnitude, events. To conduct...
Soil texture and precipitation seasonality influence plant community structure in North American temperate shrub steppe
Rachel R. Renne, John B. Bradford, Ingrid C. Burke, William K. Lauenroth
2019, Ecology (100)
In drylands, the coexistence of grasses and woody plants has been attributed to soil‐water resource partitioning. Soil texture and precipitation seasonality can influence the amount and distribution of water in the soil, and their interaction may play an important role in determining the relative importance of grasses and woody plants....
Intensity and impact of the New York Railroad superstorm of May 1921
Jeffrey J. Love, Hisashi Hayakawa, Edward W. Cliver
2019, Space Weather (17) 1281-1292
Analysis is made of low‐latitude ground‐based magnetometer data recording the magnetic superstorm of May 1921. By inference, the storm was driven by a series of interplanetary coronal mass ejections, one of which produced a maximum pressure on the magnetopause of ~64.5 nPa, sufficient to compress the subsolar magnetopause radius to...
Crustal architecture beneath the southern Midcontinent (USA) and controls on Mesoproterozoic iron-oxide mineralization from 3D geophysical models
Anne E. McCafferty, Jeffrey D. Phillips, Albert H. Hofstra, Warren C. Day
2019, Ore Geology Reviews (111)
Several types of critical mineral-bearing ore deposits in the southern Midcontinent region of the U.S. are hosted in Mesoproterozoic igneous rocks largely concealed beneath Paleozoic cover. Discerning the architecture of igneous intrusions and volcanic centers in the crust is fundamental to understanding the geologic evolution of this vast region and...
Filling knowledge gaps in a threatened shorebird flyway through satellite tracking
Yin-Chi Chan, T. Lee Tibbitts, Tamar Lok, Chris Hassell, He-Bo Peng, Zhijun Ma, Zhengwang Zhang, Theunis Piersma
2019, Journal of Applied Ecology (56) 2305-2315
Satellite‐based technologies that track individual animal movements enable the mapping of their spatial and temporal patterns of occurrence. This is particularly useful in poorly studied or remote regions where there is a need for the rapid gathering of relevant ecological knowledge to inform management actions. One such region is...
Bundle adjustment using space based triangulation method for improving the Landsat global ground reference
James C. Storey, R. Rengarajan, Mike Choate
Michael J. Choate, editor(s)
2019, Remote Sensing (11)
There is an ever-increasing interest and need for accurate geo-registration of remotely sensed data products to a common global geometric reference. Although the geo-registration has improved significantly in the last decade, the lack of an accurate global ground reference dataset poses serious issues for data providers seeking to make geometrically stackable...
Status of the Topeka shiner in Iowa
Clay Pierce, Nicholas T. Simpson, Alexander P. Bybel, Courtney L. Zambory, Michael J. Weber, Kevin J. Roe
2019, American Midland Naturalist (182) 109-117
The Topeka shiner Notropis topeka is native to Iowa, Kansas, Minnesota, Missouri, Nebraska, and South Dakota and has been federally listed as endangered since 1998. Our goals were to determine the present distribution and qualitative status of Topeka shiners throughout its current range in Iowa and characterize the extent of decline in...
One Health: A perspective from wildlife and environmental health sectors
Jonathan M. Sleeman, Katherine L. D. Richgels, C. LeAnn White, C. Stephen
2019, Scientific and Technical Review (38) 91-98
Loss of biodiversity, habitat fragmentation and pollution, and subsequent degradation of natural environments threaten the range of ecosystem services that support all life on this planet. These changes, among others, are also driving the emergence of infectious diseases, with negative health outcomes for humans, animals, and our shared environment. Historically, interventions aimed at human and agricultural...
Locating shallow seismic sources with waves scattered by surface topography: Validation of the method at the Nevada Test Site
Nian Wang, Yang Shen, Xueyang Bao, Ashton F. Flinders
2019, Journal of Geophysical Research B: Solid Earth (124) 7040-7051
Accurate and robust source location is fundamental in seismology. Previously, we proposed a new full waveform location method using waves scattered by topography near the source, and we demonstrated its potential in obtaining accurate source location using synthetic data. In the work presented here, we validate this method with observed...
Integrative taxonomy reveals a new species of freshwater mussel, Potamilus streckersoni sp. nov. (Bivalvia: Unionidae): Implications for conservation and management
Chase H. Smith, Nathan Johnson, Kentaro Inoue, Robert Doyle, Charles R. Randklev
2019, Systematics and Biodiversity (17) 331-348
Inaccurate systematics confound our ability to determine evolutionary processes that have led to the diversification of many taxa. The North American freshwater mussel tribe Lampsilini is one of the better-studied groups in Unionidae, however, many supraspecific relationships between lampsiline genera remain unresolved. Two genera previously hypothesized to...
Modeling transient soil moisture limitations on microbial carbon respiration: A cost-performance comparison
Yuchen Liu, Corey R. Lawrence, Mathew Winnick, Hsiao-Tieh Hsu, Katherine Maher, Jennifer Druhan
2019, Biogeosciences (124) 2222-2247
Soil microorganisms are known to survive periods of aridity and to recover rapidly after wetting events, with the ability to transition between a dormant state in dry conditions and an active state in wet conditions. Though this dynamic behavior has been previously incorporated into soil carbon respiration modeling frameworks, a...
Southern California and range‐wide raccoon gastrointestinal helminth database
Sara B. Weinstein, Jacey C. Van Wert, Mike Kinsella, Vasyl V. Tkach, Kevin D. Lafferty
2019, Ecology (100)
Local and global measurements of parasite prevalence and abundance are critical for understanding the dynamics that underlie the diversity, distribution, and evolution of infectious diseases. Here, we present a data set of gut helminths found in (1) raccoons throughout their range, based on primary literature from 1925–2017 and (2) raccoons...
The presence of antibiotic resistance genes in coastal soil and sediment samples from the eastern seaboard of the USA
Dale W. Griffin, William Benzel, Shawn C. Fisher, Michael J. Focazio, Luke R. Iwanowicz, Keith A. Loftin, Timothy J. Reilly, Daniel K. Jones
2019, Environmental Monitoring and Assessment (19)
Infections from antibiotic resistant microorganisms are considered to be one of the greatest global public health challenges that result in huge annual economic losses. While genes that impart resistance to antibiotics (AbR) existed long before the discovery and use of antibiotics, anthropogenic uses of antibiotics in agriculture, domesticated animals, and...
Improving pressure-limited CO2 storage capacity in saline formations by means of brine extraction
Hossein Jahediesfanjani, Steven T. Anderson, Peter D. Warwick
2019, International Journal of Greenhouse Gas Control (88) 299-310
The carbon dioxide (CO2) storage capacity of saline formations may be constrained by reservoir pressure limitations. Brine extraction could be necessary to increase the CO2 storage capacity of a given formation, manage the extent of the underground CO2 plume and induced pressure front, and control the migration direction. To estimate the additional...
Hydrocarbons in upland groundwater, Marcellus Shale Region, Northeastern Pennsylvania and Southern New York, USA
Peter B. McMahon, Bruce D. Lindsey, Matthew D. Conlon, Andrew G. Hunt, Kenneth Belitz, Bryant C. Jurgens, Brian A. Varela
2019, Environmental Science & Technology ( 53) 8027-8035
Water samples from 50 domestic wells located <1 km (proximal) and >1 km (distal) from shale-gas wells in upland areas of the Marcellus Shale region were analyzed for chemical, isotopic, and groundwater-age tracers. Uplands were targeted because natural mixing with brine and hydrocarbons from deep formations is less common in...
Morphology and genesis of giant seafloor depressions on the southeasterncontinental shelf of the Korean Peninsula
Deniz Cukur, Gee-Soo Kong, Jong-Hwa Chun, Moo-Hee Kang, In-Kwon Um, Taekhyun Kwon, Samuel E. Jordan, Kyong-O Kim
2019, Marine Geology (415)
We identify and describe five giant seafloor depressions from the southeastern continental shelf of the Korean Peninsula using multibeam bathymetry, sub-bottom profiler, and multi-channel seismic reflection data, supplemented by piston cores. Multibeam bathymetry data from the shelf show four crescent-shaped depressions (SD1 to SD4) and one near-circular depression (SD5) within...
