Publications
This list of publications includes peer-review journal articles, official USGS publications series, reports and more authored by scientists in the Ecosystems Mission Area. A database of all USGS publications, with advanced search features, can be accessed at the USGS Publications Warehouse.
Filter Total Items: 42999
Restricted gene flow between resident Oncorhynchus mykiss and an admixed population of anadromous steelhead Restricted gene flow between resident Oncorhynchus mykiss and an admixed population of anadromous steelhead
The species Oncorhynchus mykiss is characterized by a complex life history that presents a significant challenge for population monitoring and conservation management. Many factors contribute to genetic variation in O. mykiss populations, including sympatry among migratory phenotypes, habitat heterogeneity, hatchery introgression, and immigration (stray) rates. The relative influences of...
Authors
Andrew P. Matala, Brady Allen, Shawn R. Narum, Elaine Harvey
Anura—Frogs Anura—Frogs
No abstract available.
Authors
Darrel R. Frost, Emily Moriarty Lemmon, Roy W. McDiarmid, Joseph R. Mendelson III
Durable terrestrial bedrock predicts submarine canyon formation Durable terrestrial bedrock predicts submarine canyon formation
Though submarine canyons are first-order topographic features of Earth, the processes responsible for their occurrence remain poorly understood. Potentially analogous studies of terrestrial rivers show that the flux and caliber of transported bedload are significant controls on bedrock incision. Here we hypothesize that coarse sediment load could exert a similar role in the formation of...
Authors
Elliot Smith, Noah J. Finnegan, Erich R. Mueller, Rebecca J. Best
Salvator merianae (Argentine Tegu). Attempted Predation. Salvator merianae (Argentine Tegu). Attempted Predation.
No abstract available.
Authors
Emma Hanslowe, Charles V. Calafiore, Kathryn N. Sykes, Noah Van Ee, Bryan Falk, Amy Yackel, Robert Reed
Age, year‐class strength variability, and partial age validation of Kiyis from Lake Superior Age, year‐class strength variability, and partial age validation of Kiyis from Lake Superior
ge estimates of Lake Superior Kiyis Coregonus kiyi from scales and otoliths were compared and 12 years (2003–2014) of length frequency data were examined to assess year‐class strength and validate age estimates. Ages estimated from otoliths were precise and were consistently older than ages estimated from scales. Maximum otolith‐derived ages were 20 years for females and 12 years for...
Authors
Taylor A. Lepak, Derek H. Ogle, Mark R. Vinson
The lethality of hot water and ozone to aquatic invasive species The lethality of hot water and ozone to aquatic invasive species
The spread of Aquatic Invasive Species (AIS) between the Great Lakes and Mississippi River Basin by way of the Chicago Area Waterway System (CAWS) is a pressing concern to resource managers in the Midwest region. Augmenting this spread are watercrafts traveling through the CAWS locks and dams. AIS are able to attach to boat hulls, equipment, or are present in the surrounding water during...
Authors
Riley Buley
Experimental landscape reduction of wild rodents increases movements in the invasive brown treesnake (Boiga irregularis) Experimental landscape reduction of wild rodents increases movements in the invasive brown treesnake (Boiga irregularis)
Experimental studies evaluating the effects of food availability on the movement of free-ranging animals generally involve food supplementation rather than suppression. Both approaches can yield similar insights, but we were interested in the potential for using food suppression for the management and control of invasive predators, in particular, the brown treesnake (Boiga irregularis)...
Authors
Michelle Christy, Julie A. Savidge, Amy A. Yackel Adams, James E. Gragg, Gordon H. Rodda
Harvesting wildlife affected by climate change: a modelling and management approach for polar bears Harvesting wildlife affected by climate change: a modelling and management approach for polar bears
The conservation of many wildlife species requires understanding the demographic effects of climate change, including interactions between climate change and harvest, which can provide cultural, nutritional or economic value to humans.We present a demographic model that is based on the polar bear Ursus maritimus life cycle and includes density-dependent relationships linking vital rates...
Authors
Eric V. Regehr, Ryan H. Wilson, Karyn D. Rode, Michael C. Runge, Harry Stern
Taxonomic and compositional differences of ground-dwelling arthropods in riparian habitats in Glen Canyon, Arizona, USA Taxonomic and compositional differences of ground-dwelling arthropods in riparian habitats in Glen Canyon, Arizona, USA
The disturbance history, plant species composition, productivity, and structural complexity of a site can exert bottom-up controls on arthropod diversity, abundance, and trophic structure. Regulation alters the hydrology and disturbance regimes of rivers and affects riparian habitats by changing plant quality parameters. Fifty years of regulation along the Colorado River downstream of...
Authors
Barbara Ralston, Neil S. Cobb, Sandra L. Brantley, Jacob Higgins, Charles B. Yackulic
Using pharyngeal teeth and chewing pads to estimate juvenile Silver Carp total length in the La Grange Reach, Illinois River Using pharyngeal teeth and chewing pads to estimate juvenile Silver Carp total length in the La Grange Reach, Illinois River
The Silver Carp Hypophthalmichthys molitrix is an invasive species in the Mississippi River basin; an understanding of their vulnerability to predation as juveniles may inform control by native predators and predator enhancement (e.g., stocking). Digestion of Silver Carp prey recovered from diets makes it difficult to determine the size‐classes that are most vulnerable to predation by...
Authors
Eli G. Lampo, Brent C. Knights, Jonathan M. Vallazza, Cory A. Anderson, Will T. Rechkemmer, Levi E. Solomon, Andrew F. Casper, Richard M. Pendleton, James T. Lamer
Surveillance for highly pathogenic influenza A viruses in California during 2014–2015 provides insights into viral evolutionary pathways and the spatiotemporal extent of viruses in the Pacific Americas Flyway Surveillance for highly pathogenic influenza A viruses in California during 2014–2015 provides insights into viral evolutionary pathways and the spatiotemporal extent of viruses in the Pacific Americas Flyway
We used surveillance data collected in California before, concurrent with, and subsequent to an outbreak of highly pathogenic (HP) clade 2.3.4.4 influenza A viruses (IAVs) in 2014–2015 to (i) evaluate IAV prevalence in waterfowl, (ii) assess the evidence for spill-over infections in marine mammals and (iii) genetically characterize low-pathogenic (LP) and HP IAVs to refine inference on...
Authors
Andrew M. Ramey, Nichola J. Hill, Troy Cline, Magdalena Plancarte, Susan De La Cruz, Michael L. Casazza, Joshua T. Ackerman, Joseph P. Fleskes, T. Winston Vickers, Andrew B. Reeves, Frances Gulland, Christine Fontaine, Diann J. Prosser, Jonathan Runstadler, Walter M. Boyce
Spatial and temporal patterns in golden eagle diets in the western United States, with implications for conservation planning Spatial and temporal patterns in golden eagle diets in the western United States, with implications for conservation planning
Detailed information on diets and predatory ecology of Golden Eagles (Aquila chrysaetos) is essential to prioritize prey species management and to develop landscape-specific conservation strategies, including mitigation of the effects of energy development across the western United States. We compiled published and unpublished data on Golden Eagle diets to (1) summarize available...
Authors
Geoffrey Bedrosian, James W. Watson, Karen Steenhof, Michael N. Kochert, Charles R. Preston, Brian Woodbridge, Gary E. Williams, Kent R. Keller, Ross H. Crandall