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: 42773
Population expansion of Humpback chub in western Grand Canyon and hypothesized mechanisms Population expansion of Humpback chub in western Grand Canyon and hypothesized mechanisms
Humpback chub, Gila cypha, is an endangered warm water fish endemic to the Colorado River basin of southwestern North America. In Grand Canyon National Park, cold hypolimnetic water-release temperatures from Glen Canyon Dam have largely precluded successful spawning and recruitment of humpback chub in the mainstem Colorado River. Therefore, the species has utilized the warmer, more...
Authors
David R. VanHaverbeke, Dennis M. Stone, Michael Dodrill, Kirk L. Young, Michael J. Pillow
Serologic surveillance of wild and pen-reared ring-necked pheasants (Phasianus colchicus) as a method of understanding disease reservoirs Serologic surveillance of wild and pen-reared ring-necked pheasants (Phasianus colchicus) as a method of understanding disease reservoirs
We investigated exposure to infectious diseases in wild (n=33) and pen-reared (n=12) Ring-necked Pheasants (Phasianus colchicus) in the Central Valley of California during 2014 and 2015. Serologic tests were positive for antibodies against hemorrhagic enteritis (HE), infectious bursal disease (IBD), and Newcastle disease (ND) viruses in both wild and pen-reared pheasants.
Authors
Ian Dwight, Peter S. Coates, Simone T. Stoute, C. Gabriel Senties-Cue, Radhika V. Gharpure, Maurice E. Pitesky
Population genetic structure and gene flow of Adélie penguins (Pygoscelis adeliae) breeding throughout the western Antarctic Peninsula Population genetic structure and gene flow of Adélie penguins (Pygoscelis adeliae) breeding throughout the western Antarctic Peninsula
Adélie penguins (Pygoscelis adeliae) are responding to ocean–climate variability throughout the marine ecosystem of the western Antarctic Peninsula (WAP) where some breeding colonies have declined by 80%. Nuclear and mitochondrial DNA (mtDNA) markers were used to understand historical population genetic structure and gene flow given relatively recent and continuing reductions in sea ice...
Authors
Kristen B. Gorman, Sandra L. Talbot, Sarah A. Sonsthagen, George K. Sage, Megan C. Gravley, Tony D. Williams, William R. Fraser
Reproductive success of Mariana swiftlets (Aerodramus bartschi) on the Hawaiian island of O'ahu Reproductive success of Mariana swiftlets (Aerodramus bartschi) on the Hawaiian island of O'ahu
Mariana Swiftlets (Aerodramus bartschi) are federally listed as endangered, with populations currently limited to just three islands in the Mariana Islands plus an introduced population on the Hawaiian island of O'ahu. Before efforts are made to reintroduce Mariana Swiftlets to other islands in the Mariana archipelago, additional information is needed concerning their breeding biology...
Authors
Nathan C. Johnson, Susan M. Haig, Stephen M. Mosher, Jeff P. Hollenbeck
The thermal regime and species composition of fish and invertebrates in Kelly Warm Spring, Grand Teton National Park, Wyoming The thermal regime and species composition of fish and invertebrates in Kelly Warm Spring, Grand Teton National Park, Wyoming
We evaluated the thermal regime and relative abundance of native and nonnative fish and invertebrates within Kelly Warm Spring and Savage Ditch, Grand Teton National Park, Wyoming. Water temperatures within the system remained relatively warm year-round with mean temperatures >20 °C near the spring source and >5 °C approximately 2 km downstream of the source. A total of 7 nonnative...
Authors
David Harper, Aida Farag
Long-term monitoring data provide evidence of declining species richness in a river valued for biodiversity conservation Long-term monitoring data provide evidence of declining species richness in a river valued for biodiversity conservation
Free-flowing river segments provide refuges for many imperiled aquatic biota that have been extirpated elsewhere in their native ranges. These biodiversity refuges are also foci of conservation concerns because species persisting within isolated habitat fragments may be particularly vulnerable to local environmental change. We have analyzed long-term (14- and 20-y) survey data to assess...
Authors
Mary Freeman, Megan M. Hagler, Phillip M. Bumpers, Kit Wheeler, Seth J. Wenger, Byron J. Freeman
Mislabeling of an invasive vine (Celastrus orbiculatus) as a native congener (C. scandens) in horticulture Mislabeling of an invasive vine (Celastrus orbiculatus) as a native congener (C. scandens) in horticulture
The horticultural industry is an important source of invasive ornamental plant species, which is part of the motivation for an increased emphasis on using native alternatives. We were interested in the possibility that plants marketed in the midwestern United States as the native Celastrus scandens, or American bittersweet, were actually the difficult-to-distinguish invasive Celastrus...
Authors
David N. Zaya, Stacey A. Leicht-Young, Noel B. Pavlovic, Christopher S. Hetrea, Mary V. Ashley
CYP1A protein expression and catalytic activity in double-crested cormorants experimentally exposed to Deepwater Horizon Mississippi Canyon 252 oil CYP1A protein expression and catalytic activity in double-crested cormorants experimentally exposed to Deepwater Horizon Mississippi Canyon 252 oil
Double-crested cormorants (Phalacrocorax auritus, DCCO) were orally exposed to Deepwater Horizon Mississippi Canyon 252 (DWH) oil to investigate oil-induced toxicological impacts. Livers were collected for multiple analyses including cytochrome P4501A (CYP1A) enzymatic activity and protein expression. CYP1A enzymatic activity was measured by alkoxyresorufin O-dealkylase (AROD) assays...
Authors
Courtney R. Alexander, Michael J. Hooper, Dave Cacela, Kim D. Smelker, Caleshia S. Calvin, Karen M. Dean, Steve J. Bursian, Fred L. Cunningham, Katie C. Hanson-Dorr, Katherine E. Horak, John P. Isanhart, Jane E. Link, Susan A. Shriner, Celine A.J. Godard-Codding
Implementing the 2012 North American Waterfowl Management Plan revision: Populations, habitat, and people Implementing the 2012 North American Waterfowl Management Plan revision: Populations, habitat, and people
The North American Waterfowl Management Plan (NAWMP) has established a model for wildlife conservation planning over the last 3 decades. Management at a continental scale, leveraged funding, regional partnerships, and a strong science basis have been notable features. Periodic updates to the NAWMP occurred since implementation in 1986; however, a fundamental revision was accomplished in...
Authors
Dale D. Humburg, Michael G. Anderson, Michael G. Brasher, Michael F. Carter, John M. Eadie, David C. Fulton, Fred A. Johnson, Michael C. Runge, Mark P. Vrtiska
Could changes in the agricultural landscape of northeastern China have influenced the long-distance transmission of highly pathogenic avian influenza H5Nx viruses? Could changes in the agricultural landscape of northeastern China have influenced the long-distance transmission of highly pathogenic avian influenza H5Nx viruses?
In the last few years, several reassortant subtypes of highly pathogenic avian influenza viruses (HPAI H5Nx) have emerged in East Asia. These new viruses, mostly of subtype H5N1, H5N2, H5N6, and H5N8 belonging to clade 2.3.4.4, have been found in several Asian countries and have caused outbreaks in poultry in China, South Korea, and Vietnam. HPAI H5Nx also have spread over considerable...
Authors
Marius Gilbert, Diann J. Prosser, Geli Zhang, Jean Artois, Madhur S. Dhingra, Michael J. Tildesley, Scott H. Newman, Fusheng Guo, Peter Black, Filip Claes, Wantanee Kalpradvidh, YeunKyung Shin, Wooseog Jeong, John Y. Takekawa, Hansoo Lee, Xiangming Xiao
Size, growth, and density data for shallow-water sea urchins from Mexico to the Aleutian Islands, Alaska, 1956–2016 Size, growth, and density data for shallow-water sea urchins from Mexico to the Aleutian Islands, Alaska, 1956–2016
Size, growth, and density have been studied for North American Pacific coast sea urchins Strongylocentrotus purpuratus, S. droebachiensis, S. polyacanthus, Mesocentrotus (Strongylocentrotus) franciscanus, Lytechinus pictus, Centrostephanus coronatus, and Arbacia stellata by various workers at diverse sites and for varying lengths of time from 1956 to present. Numerous peer-reviewed...
Authors
Thomas A Ebert, Louis Barr, James L. Bodkin, Dirk Burcham, Dominique Bureau, Henry Carson, Nancy Caruso, Jennifer E. Caselle, Jeremy Claisse, Sabrina Clemente, Kathryn Davis, Paul Detwiler, John Dixon, David Duggins, John Engle, James Estes, Scott Groth, Benjamin Grupe, Peter Halmay, Kyle Hebert, Jose Carlos Hernandez, Laura J. Jurgens, Peter Kalvass, Michael C. Kenner, Brenda Konar, David Kushner, Lynn Lee, David Leighton, Gabriela Montano-Moctezuma, Eric Munk, Irma Olguin Espinoza, Ben Weitzman
Migration ecology and stopover population size of Red Knots Calidris canutus rufa at Mingan Archipelago after exiting the breeding grounds Migration ecology and stopover population size of Red Knots Calidris canutus rufa at Mingan Archipelago after exiting the breeding grounds
Populations of migratory birds present unique conservation challenges given the often vast distances separating critical resources throughout the annual cycle. Migration areas close to the breeding grounds represent a link between two key stages of the annual cycle, and understanding migration ecology as birds exit the breeding grounds may be particularly informative for successful...
Authors
James E. Lyons, Allan J. Baker, Patricia M. Gonzalez, Yves Aubry, Christophe Buidin, Yann Rochepault