Coproduction and modeling spatial contact networks prevent bias about infectious hematopoietic necrosis virus transmission for Snake River Basin salmonids
Jeffrey P. Mattheiss, Rachel Breyta, Gael Kurath, Shannon L. LaDeau, David James Paez, Paige F. B. Ferguson
2023, Journal of Environmental Management (334)
Much remains unknown about variation in pathogen transmission across the geographic range of a free-ranging fish or animal species and about the influence of movement (associated with husbandry practices or animal behavior) on pathogen transmission. Salmonid hatcheries are an ideal system in which to study these processes. Salmonid hatcheries are managed for endangered species recovery,...
Framework for facilitating mangrove recovery after hurricanes on Caribbean islands
Ken Krauss, Kevin R.T. Whelan, John Paul Kennedy, Daniel A. Friess, Caroline Rogers, Heather A. Stewart, Kristin Wilson Grimes, Camilo A. Trench, Danielle E. Ogurcak, Catherine A. Toline, Lianne C. Ball, Andrew From
2023, Restoration Ecology (31)
Mangrove ecosystems in the Caribbean are frequently exposed to hurricanes, leading to structural and regenerative change that elicit calls for recovery action. For those mangroves unaffected by human modifications, recovery can occur naturally. Indeed, observable natural recovery after hurricanes is the genesis of the...
Grizzly bear movement models predict habitat use for nearby populations
Sarah Nelson Sells, Cecily M. Costello, Paul Lukacs, Frank T. van Manen, Mark A. Haroldson, Wayne Kasworm, Justin Tesiberg, Milan Vinks, Daniel D. Bjornlie
2023, Biological Conservation (279)
Conservation planning and decision-making can be enhanced by ecological models that reliably transfer to times and places beyond those where models were developed. Transferrable models can be especially helpful for species of conservation concern, such as grizzly bears (Ursus arctos)....
Geologic map and hydrogeologic investigations of the upper Santa Cruz River basin, southern Arizona
William R. Page, Mark W. Bultman, Margaret E. Berry, Kenzie J. Turner, Christopher M. Menges, Floyd Gray, James B. Paces, D. Paco Van Sistine, Leah E. Morgan, Jeremy C. Havens
2023, Scientific Investigations Map 3490
This report includes an updated geologic map and cross sections of the upper Santa Cruz River basin, southern Arizona. The map and cross sections describe the geometry, thickness, and structure of the Miocene to Holocene units which form the main aquifers in the basin. The report also includes results of...
Evaluation of Ziram as an oral toxic bait chemical for control of grass carp Ctenopharyngodon idella
Nile E. Kemble, Keith Grabner, David W. Whites, David Walters, Michael J. Hooper, Jeffery A. Steevens
2023, Management of Biological Invasions (14) 477-491
The grass carp, Ctenopharyngodon idella, is an invasive species in North America that has been recorded in 45 states with breeding populations in several major river basins. Established populations of grass carp have had cascading, negative effects on aquatic ecosystem structure and function. Oral piscicide baits have been examined as a...
Mangrove reforestation provides greater blue carbon benefit than afforestation for mitigating global climate change
Shanshan Song, Yali Ding, Wei Li, Yuchen Meng, Jianping Zhou, Ruikun Gou, Conghe Zhang, Shengbin Ye, Neil Saintilan, Ken Krauss, Stephen Crooks, Shuguo Lv, Guanghui Lin
2023, Nature Communications (14)
Significant efforts have been invested to restore mangrove forests worldwide through reforestation and afforestation. However, blue carbon benefit has not been compared between these two silvicultural pathways at the global scale. Here, we integrated results from direct field measurements of over 370 restoration sites around...
Survey for selected parasites in Alaska brown bears (Ursus arctos)
Ellen Haynes, Sarah Coker, Michael J. Yabsley, Kevin Niedrighaus, Andrew M. Ramey, Guilherme Verocai, Grant Hilderbrant, Kyle Joly, Dave Gustine, Buck Mangipane, William Leacock, Anthony P. Crupi, Christopher A. Cleveland
2023, Journal of Wildlife Diseases (59) 186-191
To assess infection with or exposure to endo- and ectoparasites in Alaska brown bears (Ursus arctos), blood and fecal samples were collected during 2013–17 from five locations: Gates of the Arctic National Park and Preserve; Katmai National Park; Lake Clark National Park and...
Coherence among Oregon Coast coho salmon populations highlights increasing relative importance of marine conditions for productivity
Melanie J. Davis, James Anthony, Eric J. Ward, Julie Firman, Chris Lorion
2023, Fisheries Oceanography (32) 293-310
Anadromous fishes, such as Pacific salmon, spend portions of their life cycle in freshwater and marine systems, thus rendering them susceptible to a variety of natural and anthropogenic stressors. These stressors operate at different spatiotemporal scales, whereby freshwater conditions are more likely to impact...
Changes in wildfire occurrence and risk to homes from 1990 through 2019 in the Southern Rocky Mountains, USA
Todd Hawbaker, Paul D. Henne, Melanie K. Vanderhoof, Amanda R. Carlson, Miranda H. Mockrin, Volker C. Radeloff
2023, Ecosphere (14)
Wildfires and housing development have increased since the 1990s, presenting unique challenges for wildfire management. However, it is unclear how the relative influences of housing growth and changing wildfire occurrence have altered risk to homes, or the potential for wildfire to threaten homes. We used a...
High winds and melting sea ice trigger landward movement in a polar bear population of concern
Annie Kellner, Todd C. Atwood, David C. Douglas, Stewart Breck, George Wittemyer
2023, Ecosphere (14)
Some animal species are responding to climate change by altering the timing of events like mating and migration. Such behavioral plasticity can be adaptive, but it is not always. Polar bears (Ursus maritimus) from the southern Beaufort Sea subpopulation have mostly remained on ice year-round, but...
Status and understanding of groundwater quality in the Redding–Red Bluff shallow aquifer study unit, 2019—California GAMA priority basin project
Jennifer S. Harkness
2023, Scientific Investigations Report 2022-5127
Groundwater quality in the north Sacramento Valley (NSV) was studied in the Redding–Red Bluff shallow aquifer study unit (referred to as the NSV shallow aquifer or NSV-SA) as part of the Priority Basin Project (PBP) of the California Groundwater Ambient Monitoring and Assessment (GAMA) Program. The study unit is in...
Assessing the presence of current-use pesticides in mid-elevation Sierra Nevada streams using passive samplers, California, 2018–19
Matthew D. De Parsia, James L. Orlando, Michelle L. Hladik
2023, Scientific Investigations Report 2022-5129
Passive sampler devices were deployed in six northern California streams five times between November 2018 and December 2019 to measure the presence or absence of current-use pesticides in surface water. In the targeted areas, there are reported pesticide uses for agriculture, commercial forestry, and rights of way maintenance along with...
Endangered Klamath suckers
Summer M. Burdick
2023, Book chapter, Oregon Encyclopedia
Since Lost River suckers (Deltistes luxatus) and shortnose suckers (Chasmistes brevirostris) hatched in the early 1990s, almost none of the fish have survived to adulthood. When full grown, Lost River suckers are the largest of the Klamath suckers, averaging about two and a half feet long, whereas shortnose suckers are...
Using mercury stable isotope fractionation to identify the contribution of historical mercury mining sources present in downstream water, sediment and fish
Chris S. Eckley, Collin A. Eagles-Smith, Todd P Luxton, Joel C. Hoffman, Sarah E. Janssen
2023, Frontiers in Environmental Chemistry (4)
Ecosystems downstream of mercury (Hg) contaminated sites can be impacted by both localized releases as well as Hg deposited to the watershed from atmospheric transport. Identifying the source of Hg in water, sediment, and fish downstream of contaminated sites is important for determining the effectiveness of source-control remediation actions. This...
Integration of distributed streamflow measurement metadata for improved water resource decision-making
Kendra E. Kaiser, Kyle W. Blasch, Steven Schmitz
2023, Water (15)
Streamflow data are critical for monitoring and managing water resources, yet there are significant spatial gaps in our federal monitoring networks with biases toward large perennial rivers. In some cases, streamflow monitoring exists in these spatial gaps, but information about these monitoring locations is challenging to obtain. Here, we present...
Pressurized upflow reactor system for the bioconversion of coal to methane: Investigation of the coal/sand interface effect
Margaux Mesle, Logan H. Hodgskiss, Elliott P. Barnhart, Laura Dobeck, Joachim Eldring, Randy Hiebert, Alfred B. Cunningham, Robin Gerlach, Adrienne Phillips, Matthew W. Fields
2023, Cleaner Chemical Engineering (5)
Microbial generation of coal bed methane (CBM) represents a significant source of natural gas on Earth. While biostimulation has been demonstrated in batch cultures, environmental parameters such as overburden pressure and formation water flow need to be tested at the laboratory scale to understand in situ potential....
Improving temporal frequency of Landsat surface temperature products using the gap-filling algorithm
George Z. Xian, Hua Shi, Saeed Arab, Chase Mueller, Reza Hussain, Kristi Sayler, Danny Howard
2023, Open-File Report 2023-1006
Remotely sensed surface temperature (ST) has been widely used to monitor and assess landscape thermal conditions, hydrologic modeling, and surface energy balance. Landsat thermal sensors have continuously measured the Earth surface thermal radiance since August 1982. The thermal radiance measurements are atmospherically compensated and converted to Landsat STs and delivered...
Perception and trust influence acceptance for black bears more than bear density or conflicts
William F. Siemer, T. Bruce Lauber, Richard C. Stedman, Jeremy E. Hurst, Catherine C. Sun, Angela K. Fuller, Nicholas A. Hollingshead, Jerrold L. Belant, Kenneth Kellner III
2023, Frontiers in Conservation Science (4)
Introduction: To sustain black bear (Ursus americanus) populations, wildlife managers should understand the coupled socio-ecological systems that influence acceptance capacity for bears.Method: In a study area encompassing a portion of New York State, we spatially matched datasets from three sources: human-bear conflict reports between 2006 and 2018, estimates of local bear density...
Decoupling of species and plant communities of the U.S. Southwest: A CCSM4 climate scenario example
Kathryn A. Thomas, Brett A. Stauffer, Christopher J. Jarchow
2023, Ecosphere (14)
Climate change is predicted to alter the current climate suitability under which plant species and communities occur. Predictions of change have focused on individual species or entire communities, but theory indicates plants will not respond uniformly to climate change within or between communities. We developed models...
Effect of thermal and mechanical processes on hydraulic transmissivity evolution
Tamara Nicole Jeppson, David A. Lockner, Joshua M. Taron, Diane E. Moore, Brian D. Kilgore, Nicholas M. Beeler, Stephen H. Hickman
2023, Conference Paper, Proceedings, 48th Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, California, February 6-8, 2023
Fracture healing is a critical component of enhanced geothermal systems, the earthquake cycle, and induced seismicity. Accordingly, there is significant interest in understanding the process of healing and its effects on fluid transport. The creation, reactivation, and sustainability of fracture networks depend on complex coupling among thermal, hydraulic, mechanical, and...
A comparison of direct & indirect survey methods for estimating colonial nesting waterbird populations
Diann J. Prosser, Jeffery D. Sullivan, Christopher J. Gilbert, David F. Brinker, Peter C. McGowan, Carl R. Callahan, Ben Hutzell, Laurence E. Smith
2023, Waterbirds (45) 189-198
Population estimates derived from monitoring efforts can be sensitive to the survey method selected, potentially leading to biased estimates and low precision relative to true population size. While small unmanned aerial systems (UAS) present a unique opportunity to survey avian populations while limiting disturbance, relatively...
Genetic diversity and IUCN Red List status
Chloe Schmidt, Sean M. Hoban, Margaret Hunter, Ivan Paz-Vinas, Colin J. Garroway
2023, Conservation Biology (37)
The International Union for Conservation of Nature (IUCN) Red List is an important and widely used tool for conservation assessment. The IUCN uses information about a species’ range, population size, habitat quality and fragmentation levels, and trends in abundance to assess extinction risk. Genetic...
eDNA Metabarcoding Analyses of Diet in Yellow-Billed Loons of Northern Alaska
Damian M. Menning, Brian D. Uher-Koch, Melanie J. Flamme, Trey Simmons, Joel Schmutz, Sandra Talbot
2023, Waterbirds (45) 159-166
Environmental DNA is a burgeoning tool used to address wide-ranging scientific questions, including determining diets of difficult-to-sample predators. Loons are large piscivorous diving birds that capture and consume prey underwater, making it nearly impossible to visually determine their diet via observation alone. Identifying species' diets...
Mapping ancient sedimentary organic matter molecular structure at nanoscales using optical photothermal infrared spectroscopy
Aaron M. Jubb, Martha Stokes, Ryan J. McAleer, Paul C. Hackley, Eoghan Dillion, Jing Qu
2023, Organic Geochemistry (177)
Elucidating the molecular structure of sedimentary organic matter (SOM) is key to understanding petroleum generation processes, as well as ancient sedimentary environments. SOM structure is primarily controlled by biogenic source material (e.g., marine vs. terrigenous), depositional conditions, and subsurface thermal history. Additional factors, e.g., strain, may also impact the...
Declines in body size of sockeye salmon associated with increased competition in the ocean
Jan Ohlberger, Timothy Joseph Cline, Daniel Schindler, Bert Lewis
2023, Proceedings of the Royal Society B (290)
Declining body sizes have been documented for several species of Pacific salmon; however, whether size declines are caused mainly by ocean warming or other ecological factors, and whether they result primarily from trends in age at maturation or changing growth rates remain poorly understood. We quantified changes in mean body...
