Cryptic introduction of water chestnut (Trapa) in the northeastern United States
Greg Chorak, Lynde Dodd, Nancy B. Rybicki, Kadiera Ingram, Murat Buyukyoruk, Yasuro Kadono, Yuan Yuan Chen, Ryan Thum
2019, Aquatic Botany (155) 32-37
Trapa natans, characterized by four-horned fruits, has been recognized as an introduced species in the northeastern United States since the 1920′s. However, in 2014 a two-horned morphotype of Trapa was discovered in the Potomac River in Virginia. As such, we hypothesize the two-horned variety represents a cryptic introduction of a Trapa taxon distinct from...
Geology and paleontology of the late Miocene Wilson Grove Formation at Bloomfield Quarry, Sonoma County, California
Charles L. Powell, Robert W. Boessenecker, N. Adam Smith, Robert J. Fleck, Sandra J. Carlson, James R. Allen, Douglas J. Long, Andrei M. Sarna-Wojcicki, Raj B. Guruswami-Naidu
2019, Scientific Investigations Report 2019-5021
An extensive fauna of at least 77 taxa is reported from the basal Wilson Grove Formation in a small quarry just north of the town of Bloomfield, Sonoma County, California. The fauna represents intertidal to shallow subtidal water depths and water temperatures interpreted from the fauna, consistent with the latitude...
Effects of exercise and bioprocessed soybean meal diets during rainbow trout rearing
Jill M. Voorhees, Michael E. Barnes, Steven R. Chipps, Michael L. Brown
2019, The Open Biology Journal (7) 1-13
Background: Alternative protein sources to fishmeal in fish feeds are needed.Objectives: Evaluate rearing performance of adult rainbow trout (Oncorhynchus mykiss) (initial weight 139.0 ±1.5 g, length 232.9 ± 0.8 mm, mean ± SE) fed one of the two isonitrogenous and isocaloric diets (46% protein, 16% lipid) and reared at one...
Hydrologic Influences on Water Levels at Three Oaks Recreation Area, Crystal Lake, Illinois, April 14 through September 27, 2016
Amy M. Gahala
2019, Scientific Investigations Report 2018-5105
Hydrologic influences on water levels were investigated at Three Oaks Recreation Area (TORA), a former sand-and-gravel quarry converted into recreational lakes in Crystal Lake, Illinois. From 2009 to 2015, average water levels in the lakes declined nearly 4 feet. It was not clear if these declines were related to variations...
Ligation and division of ductus deferens does not produce long term sterility in most bighead carp or grass carp
Duane Chapman, Marco Milardi, F. Anthony Mann
2019, Management of Biological Invasions (10) 285-295
Invading species are most easily eradicated or controlled if detected early and rapid action can be taken, but locating and eradicating small numbers of aquatic invaders is extremely difficult. Bighead carp (Hypophthalmichthys nobilis) and grass carp (Ctenopharyngodon idella) are Asian cyprinids that have been widely introduced and are considered undesirable...
Shrews (Eulipotyphla, Soricidae) of Guatemala /Musarañas (Eulipotyphla, Soricidae) de Guatemala
John O. Matson, Neal Woodman
2019, Book chapter, Perspectivas de investigación sobre los mamíferos silvestres de Guatemala: Research Perspectives on the Wild Mammals of Guatemala
Shrews (Soricidae) are the only members of the mammalian order Eulipotyphla that occur in Central and South America. In Guatemala, 15 species have been recorded belonging to the genera Cryptotis and Sorex, three of which are new and undescribed. Two additional species are expected to be discovered in the country...
Identification of single nucleotide polymorphisms for use in a genetic stock identification system for greater white-fronted goose (Anser albifrons) subspecies wintering in California
Robert E. Wilson, Sarah A. Sonsthagen, Jeffrey M. DaCosta, Craig R. Ely, Michael D. Sorenson, Sandra L. Talbot
2019, Open-File Report 2019-1040
California provides wintering habitat for most greater white-fronted geese (Anser albifrons [GWFG]) in the Pacific Flyway and this population has rapidly increased since the 1980s. Increased harvest of GWFG wintering in California may prevent agricultural depredation while providing increased hunting opportunities. However, changes in harvest levels are unlikely to...
The complimentary role of lentic and lotic habitats for Arctic grayling in a complex stream-lake network in Arctic Alaska
Mark S. Wipfli, Kurt C. Heim1, Christopher D. Arp2, Matthew S. Whitman3
2019, Ecology of Freshwater Fish (28) 209-221
Lakes can be important to stream dwelling fishes, yet how individuals exploit habitat heterogeneity across complex stream-lake networks is poorly understood. Furthermore, despite growing awareness that intermittent streams are widely used by fish, studies documenting use of seasonally accessible lakes remain scarce. We studied Arctic grayling (Thymallus arcticus) in a...
Fishing for conservation of freshwater tropical fish in the Anthropocene
Sui Chian Phang, Michael S. Cooperman, Abigail Lynch, Ashley Steel, Vittoria Elliott, Karen J. Murchie, Steven J. Cooke, Scott Dowd, Ian G. Cowx
2019, Aquatic Conservation: Marine and Freshwater Ecosystems (29) 1039-1051
1. Biodiversity and fisheries are two important assets of freshwater ecosystems that are currently at risk from external threats. Establishing an equitable resolution to these threats is a major challenge of the Anthropocene. 2. This is particularly pertinent in developing nations where hotspots for biodiversity converge with rapid, and often...
Mountain plant communities: Uncertain sentinels?
George P. Malanson, Lynn M Resler, Daniel B. Fagre, David R Butler
2019, Progress in Physical Geography: Earth and Environment (43) 521-543
Mountain plant communities are thought to be sensitive to climate change and thus able to reveal its effects sooner than others. Two plant communities examined here, alpine treeline ecotones and alpine tundra, have been observed to respond to climate change in recent decades. Treeline has moved upslope and...
Incorporating social-ecological considerations into basin-wide responses to climate change in the Colorado River Basin
Lucas S. Bair, Charles B. Yackulic, John C. Schmidt, Denielle M. Perry, Christine J. Kirchhoff, Karletta Chief, Benedict J. Colombi
2019, Current Opinion in Environmental Sustainability (37) 14-19
During the last 50 years, construction of dams in the western United States declined. This is partly because of increasing recognition of diverse and unintended social-ecological consequences of dams. Today, resource managers are recognizing the wide array of tradeoffs and are including a more diverse group of stakeholders in decision...
China’s domestic and foreign influence in the global cobalt supply chain
Andrew L. Gulley, Erin McCullough, Kim Shedd
2019, Resources Policy (62) 317-323
In addition to increasing interest in the supply risk of minerals produced in China, there is also concern that China’s efforts to mitigate mineral supply risk—through foreign direct investment—may limit mineral availability for other countries in the short-term (due to production capacity constraints). However, little is publicly known about the...
Induced seismicity reduces seismic hazard?
Andrew J. Barbour, Frederick Pollitz
2019, Geophysical Research Letters (46) 4170-4173
Earthquakes caused by human activities have been observed for decades. Often these are related to industrial activities pumping fluids into deep geologic formations, like with wastewater disposal. The simplest theory connecting these processes to earthquakes is straightforward: injection leads to fluid pressure changes that either reduce...
Overview of future USGS Gulf of Mexico buoyant storage assessment project
Sean T. Brennan
2019, Conference Paper
The United States Geological Survey (USGS) is a member of a U.S. Department of Energy-funded partnership headed by the University of Texas Bureau of Economic Geology that is working to assess the feasibility of offshore geologic carbon dioxide (CO2) storage in the Gulf of Mexico. The role of the...
Denitrification in the river network of a mixed land use watershed: Unpacking the complexities
Rebecca Kreiling, William B. Richardson, Lynn A. Bartsch, Martin C. Thoms, Victoria G. Christensen
2019, Biogeochemistry (143) 327-346
River networks have the potential to permanently remove nitrogen through denitrification. Few studies have measured denitrification rates within an entire river network or assessed how land use affect rates at larger spatial scales. We sampled 108 sites throughout the network of the Fox River watershed, Wisconsin, to determine if land...
Gas hydrate production testing – Knowledge gained
Timothy S. Collett
2019, Conference Paper, Proceedings of the Offshore Technology Conference
Since their initial discovery in the 1960’s, gas hydrates have been considered to be an important potential source of unconventional natural gas. Significant progress has been made relative to our understanding of the geologic and engineering controls on the ultimate energy potential of gas hydrate; however, more work is required...
Development of deepwater natural gas hydrates
Steve Hancock, Ray Boswell, Timothy S. Collett
2019, Conference Paper, Proceedings of the 2019 Offshore Technology Conference
Deepwater natural gas hydrate resources potentially exceed all other conventional and non-conventional hydrocarbon resources on a world-wide basis. However, before these offshore gas hydrate resources can be classified as reserves, it must be demonstrated that gas hydrates can be produced under conditions that make economic sense. The purpose of...
Global virtual water trade and the hydrological cycle: Patterns, drivers, and socio-environmental impacts
Paolo D’Odorico, Joel A. Carr, Carole Dalin, Jampel Dell’Angelo, Megan Konar, Francesco Laio, Luca Ridolfi, Lorenzo Rosa, Samir Suweis, Stefania Tamea, Marta Tuninetti
2019, Environmental Research Letters (14)
The increasing global demand for farmland products is placing unprecedented pressure on the global agricultural system and its water resources. Many regions of the world, that are affected by a chronic water scarcity relative to their population, strongly depend on the import of agricultural commodities and associated embodied (or virtual)...
Erosion monitoring along selected bank locations of the Coosa River in Alabama using terrestrial light detection and ranging (T–lidar) technology, 2014–17
Richard J. Huizinga, Daniel M. Wagner
2019, Scientific Investigations Report 2019-5023
The Alabama Power Company operates a series of dams on the Coosa River in east central Alabama. Seven dams impound the river to form six reservoirs: Weiss Lake, H Neely Henry Lake, Logan Martin Lake, Lay Lake, Lake Mitchell, and Lake Jordan. Streamflow below these reservoirs is primarily controlled by...
Pleistocene hydrothermal activity on Brokeoff volcano and in the Maidu volcanic center, Lassen Peak area, northeast California: Evolution of magmatic-hydrothermal systems on stratovolcanoes
David A. John, Robert G. Lee, George N. Breit, John H. Dilles, Andrew T. Calvert, L.J. Patrick Muffler, Michael A. Clynne
2019, Geopshere (15) 946-982
Partially eroded stratovolcanoes worldwide, notably Mounts Rainier and Adams in the Cascades and several volcanoes in Japan, record episodic periods of eruption and geothermal activity that produce zones of hydrothermal alteration. The partly eroded core of late Pleistocene Brokeoff volcano on the south side of Lassen Peak exposes the upper...
Changing climates and challenges to Charadrius plover success throughout the annual cycle
Susan M. Haig
2019, Book chapter, The population ecology and conservation of Charadrius Plovers
The Arctic tundra, as well as coastal and inland mudflats and beaches occupied by the 63 Charadrius plover species and subspecies around the world encompass some of the habitats most threatened by current climatic challenges. The migratory habits of most plover species further intensifies these effects as the birds...
Future challenges for Charadruis Plovers
Susan M. Haig, Mark A Colwell
2019, Book chapter, The population ecology and conservation of Charadrius Plovers
Formation of pedestalled, relict lakes on the McMurdo Ice Shelf, Antarctica
Grant J MacDonald, Alison F Banwell, Ian C Willis, David Mayer, Becky Goodsell, Douglas R MacAyeal
2019, Journal of Glaciology 1-7
Surface debris covers much of the western portion of the McMurdo Ice Shelf and has a strong influence on the local surface albedo and energy balance. Differential ablation between debris-covered and debris-free areas creates an unusual heterogeneous surface of topographically low, high-ablation,...
Reducing sampling uncertainty in aeolian research to improve change detection
Nicholas P. Webb, Adrian Chappell, Brandon L. Edwards, Sarah E. McCord, Justin W. Van Zee, Bradley F. Cooper, Ericha M. Courtright, Michael C. Duniway, Brenton Sharratt, Negussie H Tedela, David Toledo
2019, Journal of Geophysical Research F: Earth Surface (124) 1366-1377
Measurements of aeolian sediment transport support our understanding of mineral dust impacts on Earth and human systems and assessments of aeolian process sensitivities to global environmental change. However, sample design principles are often overlooked in aeolian research. Here, we use high‐density field measurements of sediment mass flux across land use...
Case studies in groundwater contaminant fate and transport
Barbara A. Bekins
2019, Environmental Science
A case study of groundwater contamination is a detailed study of a single site contaminated with a chemical or mixture that is known to be a problem at many sites. The goal of case studies is to provide insights into the physical, chemical, and biological processes controlling migration, natural...
