Thiamine concentrations in lake trout and Atlantic salmon eggs during 14 years following the invasion of alewife in Lake Champlain
Bret J. Ladago, Matthew H. Futia, William R. Ardren, Dale C. Honeyfield, Kevin P. Kelsey, Carrie L. Kozel, Stephen Riley, Jacques Rinchard, Donald E. Tillitt, James L. Zajicek, J. Ellen Marsden
2020, Journal of Great Lakes Research (45) 1340-1348
Thiamine (vitamin B1) deficiency in Great Lakes salmonines has been linked to consumption of alewife Alosa pseudoharengus. Thiamine deficiency has been recognized as a possible impediment to lake trout Salvelinus namaycush recruitment in the Great Lakes and Atlantic salmon Salmo salar recruitment in the Finger Lakes and Baltic Sea. Alewife invaded Lake Champlain in 2003...
Sediment delivery to marsh platforms minimized by source decoupling and flux convergence
Daniel Coleman, Neil K. Ganju, Matthew Kirwan
2020, Geophysical Research Letters (125)
Sediment supply is a primary factor in determining marsh response to sea level rise and is typically approximated through high‐resolution measurements of suspended sediment concentrations (SSCs) from adjacent tidal channels. However, understanding sediment transport across the marsh itself remains limited by discontinuous measurements of SSC over individual...
Integrating perspectives to understand lake ice dynamics in a changing world
Sapna Sharma, Michael F. Meyer, Joshua Culpepper, Xiao Yang, Stephanie Hampton, Stella A. Berger, Matthew R. Brousil, Steven C. Fradkin, Scott N. Higgins, Kathi Jo Jankowski, Georgiy Kirillin, Adrianne P Smits, Emily C. Whitaker, Foad Yousef, Shuai Zhang
2020, Journal of Geophysical Research: Biogeosciences (125)
Ice cover plays a critical role in physical, biogeochemical, and ecological processes in lakes. Despite its importance, winter limnology remains relatively understudied. Here, we provide a primer on the predominant drivers of freshwater lake ice cover and the current methodologies used to study lake ice, including in...
Importance of accurately quantifying internal loading in developing phosphorus reduction strategies for a chain of shallow lakes
Dale M. Robertson, Matthew W. Diebel
2020, Lake and Reservoir Management (36) 391-411
The Winnebago Pool is a chain of 4 shallow lakes in Wisconsin. Because of high external phosphorus (P) inputs to the lakes, the lakes became highly eutrophic, with much P contained in their sediments. In developing a total maximum daily load (TMDL) for these lakes, it is...
Comparison of storm runoff models for a small watershed in an urban metropolitan area, Albuquerque, New Mexico
Zachary M. Shephard, Kyle R. Douglas-Mankin
2020, Scientific Investigations Report 2020-5058
In order to comply with a current U.S. Environmental Protection Agency watershed-based National Pollutant Discharge Elimination System permit, the City of Albuquerque required a better understanding of the rainfall-runoff processes in its small urban watersheds. That requirement prompted the initiation of the assessment of three existing watershed models that were...
Large-scale erosion driven by intertidal eelgrass loss in an estuarine environment
Ryan K. Walter, Jenifer K. O’Leary, Sean Vitousek, Mohsen Taherkhani, Carolyn Geraghty, Ann Kitajima
2020, Estuarine, Coastal and Shelf Science (243)
Seagrasses influence local hydrodynamics by inducing drag on the flow and dampening near-bed velocities and wave energy. When seagrasses are lost, near-bed currents and wave energy can increase, which enhances bottom shear stresses, destabilizes sediment, and promotes suspension and erosion. Though seagrasses are being lost rapidly globally, the magnitude of...
DNA metabarcoding of feces to infer summer diet of Pacific walruses
Sarah A. Sonsthagen, Chadwick V. Jay, Robert S. Cornman, Anthony S. Fischbach, Jacqueline M. Grebmeier, Sandra L. Talbot
2020, Marine Mammal Science (36) 1196-1211
Environmental conditions in the Chukchi Sea are changing rapidly and may alter the abundance and distribution of marine species and their benthic prey. We used a metabarcoding approach to identify potentially important prey taxa from Pacific walrus (Odobenus rosmarus divergens) fecal samples (n = 87). Bivalvia was the most dominant class...
Key components and contrasts in the nitrogen budget across a US-Canadian transboundary watershed
Jiajia Lin, Jana Compton, Chris Clark, Shabtai Bittman, Donna Schwede, Peter Homann, Peter Kiffney, David Hooper, Gary Bahr, Jill S. Baron
2020, Journal of Geophysical Research: Biogeosciences (125)
Watershed nitrogen (N) budgets provide insights into drivers and solutions for groundwater and surface water N contamination. We constructed a comprehensive N budget for the transboundary Nooksack River Watershed (British Columbia, Canada, and Washington, USA) using locally derived data, national statistics, and standard parameters. Feed imports...
Monitoring and real-time modeling of Escherichia coli bacteria for the Chattahoochee River, Chattahoochee River National Recreation Area, Georgia, 2000–2019
Brent T. Aulenbach, Anna M. McKee
2020, Open-File Report 2020-1048
The Chattahoochee River National Recreation Area (CRNRA) is a National Park Service unit/park with 48 miles of urban waterway in the Atlanta metropolitan area. The Chattahoochee River within the CRNRA is a popular place for water-based recreation but is known to periodically experience elevated levels of fecal-coliform bacteria associated with...
Pesticide concentrations associated with augmented flow pulses in the Yolo Bypass and Cache Slough Complex, California
James L. Orlando, Matt De Parsia, Corey J. Sanders, Michelle L. Hladik, Jared Frantzich
2020, Open-File Report 2020-1076
Surface-water and suspended-sediment samples were collected and analyzed by the U.S. Geological Survey for multiple current-use pesticides and pesticide degradates approximately every 2 weeks at up to five sites in the Yolo Bypass and Cache Slough Complex before, during, and after augmented flow pulses in summer and fall 2016 and...
Benthic habitat is an integral part of freshwater Mysis ecology
Jason D. Stockwell, Brian O’Malley, Sture Hansson, Rosie C Chapina, Lars G. Rudstam, Brian Weidel
2020, Freshwater Biology (65) 1997-2009
Diel vertical migration (DVM) is common in aquatic organisms. The trade‐off between reduced predation risk in deeper, darker waters during the day and increased foraging opportunities closer to the surface at night is a leading hypothesis for DVM behaviour.Diel vertical migration behaviour has dominated research and assessment frameworks for Mysis ,...
An invasive disease, sylvatic plague, increases fragmentation of black-tailed prairie dog (Cynomys ludovicianus) colonies
Krystal M. Keuler, Gebbiana M. Bron, Randall Griebel, Katherine Richgels
2020, PLoS ONE (15)
ContextA disease can be a source of disturbance, causing population declines or extirpations, altering species interactions, and affecting habitat structure. This is particularly relevant for diseases that affect keystone species or ecosystem engineers, leading to potentially cascading effects on ecosystems.<div...
Linking land and sea through an ecological-economic model of coral reef recreation
Kirsten L. L. Oleson, Kenneth J. Bagstad, Carlo Fezzi, Megan Barnes, Mary Donovan, Kim A. Falinski, Kelvin Gorospe, Hla Htun, Joey Lecky, Ferdinando Villa, Tamara Wong
2020, Ecological Economics (177)
Coastal zones are popular recreational areas that substantially contribute to social welfare. Managers can use information about specific environmental features that people value, and how these might change under different management scenarios, to spatially target actions to areas of high current or potential value. We explored how snorkelers’ experience would...
Effectiveness of partial sedation to reduce stress in captured mule deer
Anna C. Ortega, Samantha P. Dwinnell, Tayler N. Lasharr, Rhiannon P. Jakopak, Kristin Denryter, Katey S. Huggler, Matthew M. Hayes, Ellen O. Aikens, Tana L Verzuh, Alexander B. May, Matthew Kauffman, Kevin L. Monteith
2020, Journal of Wildlife Management (84) 1445-1456
Information garnered from the capture and handling of free-ranging animals helps advance understanding of wildlife ecology and can aid in decisions on wildlife management. Unfortunately, animals may experience increased levels of stress, injuries, and death resulting from captures (e.g., exertional myopathy, trauma). Partial sedation is a technique proposed to alleviate...
Application of empirical land-cover changes to construct climate change scenarios in federally managed lands
Christopher E. Soulard, Matthew B. Rigge
2020, Remote Sensing (12)
Sagebrush-dominant ecosystems in the western United States are highly vulnerable to climatic variability. To understand how these ecosystems will respond under potential future conditions, we correlated changes in National Land Cover Dataset “Back-in-Time” fractional cover maps from 1985-2018 with Daymet climate data in three federally managed preserves in the sagebrush...
Flowering plants preferred by bees of the Prairie Pothole Region
Stacy C. Simanonok, Clint Otto
2020, Fact Sheet 2020-3038
Land managers have stressed the need for improved pollinator habitat on private and public lands of the Prairie Pothole Region. Understanding flowering plant preferences of pollinators will improve the cost-effectiveness of conservation seeding mixes. The purpose of this fact sheet is to assist conservation planners and producers with developing seed...
Landsat 9: Empowering open science and applications through continuity
Jeffery G. Masek, Michael A. Wulder, Brian Markham, Joel McCorkel, Christopher J. Crawford, James C. Storey, Del Jenstrom
2020, Remote Sensing of Environment (248)
The history of Earth observation from space is well reflected through the Landsat program. With data collection beginning with Landsat-1 in 1972, the program has evolved technical capabilities while maintaining continuity of land observations. In so doing, Landsat has provided a critical reference for assessing long-term changes to Earth's land...
Reconstructing the velocity and deformation of a rapid landslide using multiview video
Thomas D Rapstine, Francis K. Rengers, Kate E. Allstadt, Richard M. Iverson, Joel B. Smith, Maciej Obryk, M. Logan, M. J. Olsen
2020, Journal of Geophysical Research - Earth Surface (125)
Noncontact measurements of spatially varied ground surface deformation during landslide motion can provide important constraints on landslide mechanics. Here, we present and test a new method for extracting measurements of rapid landslide surface displacement and velocity (accelerations of approximately 1 m/s2) using sequences of stereo images obtained from a pair of...
The importance of explicitly modelling sea-swell waves for runup on reef-lined coasts
Ellen Quataert, Curt D. Storlazzi, Ap van Dongeren, Robert T. McCall
2020, Coastal Engineering (160)
The importance of explicitly modelling sea-swell waves for runup was examined using a 2D XBeach short wave-averaged (surfbeat, “XB-SB”) and a wave-resolving (non-hydrostatic, “XB-NH”) model of Roi-Namur Island on Kwajalein Atoll in the Republic of Marshall Islands. Field observations on water levels, wave heights, and wave runup were used to...
Brianna postcard
U.S. Geological Survey
2020, General Information Product 205
Brianna is a hydrologist in the Hydrologic Investigations (Studies) Unit. She received a bachelor of science degree in chemical engineering and a master’s degree in civil engineering from the University of Kansas....
Brad postcard
U.S. Geological Survey
2020, General Information Product 204
Brad is a hydrologist in the Surface Water Investigation Unit. He received his bachelor of science degree in natural sciences from Concordia University in Wisconsin and his master’s degree in freshwater sciences from the University of Wisconsin-Milwaukee....
Hydrologic technician postcard
U.S. Geological Survey
2020, General Information Product 203
Hydrologic technicians collect water data related to water quantity, quality, availability, and movement in surface-water and groundwater environments.For more information, visit https://www.usajobs.gov....
Chantelle postcard
U.S. Geological Survey
2020, General Information Product 202
Chantelle is a hydrologist in the Surface Water Investigation Unit. She received her bachelor of science degree in environmental geology from the University of Kansas....
Hydrologist postcard
U.S. Geological Survey
2020, General Information Product 201
Hydrologists study the properties, distribution, and effects of water on the Earth’s surface, in the soil and underlying rocks, and in the atmosphere.For more information, visit https://www.usajobs.gov....
Chemist postcard
U.S. Geological Survey
2020, General Information Product 200
Chemists design analytical methods, analyze samples, and review instrument results to ensure high-quality, defensible data are provided to our Nation’s decision makers.For more information, visit https://www.usajobs.gov....
