Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16780
Cross-seasonal effects on waterfowl productivity: Implications under climate change
Previous efforts to relate winter-ground precipitation to subsequent reproductive success as measured by the ratio of juveniles to adults in the autumn failed to account for increased vulnerability of juvenile ducks to hunting and uncertainty in the estimated age ratio. Neglecting increased juvenile vulnerability will positively bias the mean productivity estimate, and neglecting increased vulnera
Authors
Erik E. Osnas, Qing Zhao, Michael C. Runge, G Scott Boomer
Adaptive management for improving species conservation across the captive-wild spectrum
Conservation of endangered species increasingly envisages complex strategies that integrate captive and wild management actions. Management decisions in this context must be made in the face of uncertainty, often with limited capacity to collect information. Adaptive management (AM) combines management and monitoring, with the aim of updating knowledge and improving decision-making over time. We p
Authors
Stefano Canessa, Gurutzeta Guillera-Arroita, José J. Lahoz-Monfort, Darren M Southwell, Doug P. Armstrong, Iadine Chadès, Robert C Lacy, Sarah J. Converse
Urban base flow with low impact development
A novel form of urbanization, low impact development (LID), aims to engineer systems that replicate natural hydrologic functioning, in part by infiltrating stormwater close to the impervious surfaces that generate it. We sought to statistically evaluate changes in a base flow regime because of urbanization with LID, specifically changes in base flow magnitude, seasonality, and rate of change. We u
Authors
Aditi Bhaskar, Dianna M. Hogan, Stacey A. Archfield
The road to NHDPlus — Advancements in digital stream networks and associated catchments
A progression of advancements in Geographic Information Systems techniques for hydrologic network and associated catchment delineation has led to the production of the National Hydrography Dataset Plus (NHDPlus). NHDPlus is a digital stream network for hydrologic modeling with catchments and a suite of related geospatial data. Digital stream networks with associated catchments provide a geospatial
Authors
Richard B. Moore, Thomas A. Dewald
Novel cell-based assay for detection of thyroid receptor beta-interacting environmental contaminants
Even though the presence of endocrine disrupting chemicals (EDCs) with thyroid hormone (TH)-like activities in the environment is a major health concern, the methods for their efficient detection and monitoring are still limited. Here we describe a novel cell assay, based on the translocation of a green fluorescent protein (GFP)—tagged chimeric molecule of glucocorticoid receptor (GR) and the thyr
Authors
Diana A. Stavreva, Lyuba Varticovski, Ludmila Levkova, Anuja A. George, Luke Davis, Gianluca Pegoraro, Vicki S. Blazer, Luke R. Iwanowicz, Gordon L. Hager
An exploratory assessment of thiamine status in western Alaska Chinook salmon (Oncorhynchus tshawytscha)
This study was conducted to investigate the thiamine status of Chinook salmon Oncorhynchus tshawytscha. Egg thiamine levels in Yukon and Kuskokwim River Chinook were examined in 2001 and 2012. Muscle and liver thiamine in Chinook, coho O. kisutch, chum O. keta, and pink O. gorbuscha salmon were measured in northern Bering Sea juveniles and the percentage of the diet containing thiaminase, an enzym
Authors
Dale C. Honeyfield, James M. Murphy, Katherine G. Howard, Wesley W. Strasburger, A.C. Matz
Osmoregulatory physiology and rapid evolution of salinity tolerance in threespine stickleback recently introduced to fresh water
Background: Post-Pleistocene diversification of threespine stickleback in fresh water offers a valuable opportunity to study how changes in environmental salinity shape physiological evolution in fish. In Alaska, the presence of both ancestral oceanic populations and derived landlocked populations, including recent lake introductions, allows us to examine rates and direction of evolution of osmore
Authors
Jeffrey N Divino, Michelle Y. Monette, Stephen D. McCormick, Paul H. Yancey, Kyle G. Flannery, Michael A. Bell, Jennifer L. Rollins, Frank A. von Hippel, Eric T. Schultz
Tracking domestic ducks: A novel approach for documenting poultry market chains in the context of avian influenza transmission
Agro-ecological conditions associated with the spread and persistence of highly pathogenic avian influenza (HPAI) are not well understood, but the trade of live poultry is suspected to be a major pathway. Although market chains of live bird trade have been studied through indirect means including interviews and questionnaires, direct methods have not been used to identify movements of individual p
Authors
Chang-Yong Choi, John Y. Takekawa, Yue Xiong, Martin Wikelski, George Heine, Diann J. Prosser, Scott H. Newman, John Edwards, Fusheng Guo, Xiangming Xiao
Variability of bed drag on cohesive beds under wave action
Drag force at the bed acting on water flow is a major control on water circulation and sediment transport. Bed drag has been thoroughly studied in sandy waters, but less so in muddy coastal waters. The variation of bed drag on a muddy shelf is investigated here using field observations of currents, waves, and sediment concentration collected during moderate wind and wave events. To estimate bottom
Authors
Ilgar Safak
Lake transparency: a window into decadal variations in dissolved organic carbon concentrations in Lakes of Acadia National Park, Maine
A forty year time series of Secchi depth observations from approximately 25 lakes in Acadia National Park, Maine, USA, evidences large variations in transparency between lakes but relatively little seasonal cycle within lakes. However, there are coherent patterns over the time series, suggesting large scale processes are responsible. It has been suggested that variations in colored dissolved organ
Authors
Collin S. Roesler, Charles W. Culbertson
Fifty-seventh supplement to the American Ornithologists' Union Check-list of North American Birds
This is the 16th supplement since publication of the 7th edition of the Check-list of North American Birds (American Ornithologists' Union [AOU] 1998). It summarizes decisions made between April 15, 2015, and April 15, 2016, by the AOU's Committee on Classification and Nomenclature—North and Middle America. The Committee has continued to operate in the manner outlined in the 42nd Supplement (AOU 2
Authors
R. Terry Chesser, Kevin J Burns, Carla Cicero, Jon L. Dunn, Andrew W. Kratter, Irby J. Lovette, Pamela C. Rasmussen, J.V. Remsen, James D. Rising, Douglas F. Stotz, Kevin Winker
Spatial database for a global assessment of undiscovered copper resources: Chapter Z in Global mineral resource assessment
As part of the first-ever U.S. Geological Survey global assessment of undiscovered copper resources, data common to several regional spatial databases published by the U.S. Geological Survey, including one report from Finland and one from Greenland, were standardized, updated, and compiled into a global copper resource database. This integrated collection of spatial databases provides location, ge
Authors
Connie L. Dicken, Pamela Dunlap, Heather L. Parks, Jane M. Hammarstrom, Michael L. Zientek