Nearshore bathymetric changes along the Alaska Beaufort Sea coast and possible physical drivers
Mark Zimmermann, Li H. Erikson, Ann E. Gibbs, Megan M. Prescott, Stephen M. Escarzaga, Craig E. Tweedie, Jeremy L. Kasper, Paul X. Duvoy
2022, Continental Shelf Research (242)
Erosion rates along Alaska's Beaufort Sea coast, among the highest in the world, are negatively impacting communities, industrial and military infrastructure, and wildlife habitat. Decreasing maximal winter ice extent and increasing summer open water duration and extent in the Beaufort Sea may be making the coast more vulnerable to destructive storm...
Satellites quantify the spatial extent of cyanobacterial blooms across the United States at multiple scales
Blake Schaeffer, Erin Urquhart, Megan Coffer, Wilson Salls, Richard Stumpf, Keith A. Loftin, P. Jeremy Werdell
2022, Ecological Indicators (140)
Previous studies indicate that cyanobacterial harmful algal bloom (cyanoHAB) frequency, extent, and magnitude have increased globally over the past few decades. However, little quantitative capability is available to assess these metrics of cyanoHABs across broad geographic scales and at regular intervals. Here, the spatial extent was quantified from a cyanobacteria...
Late Holocene human-environment interactions on the central California coast, USA, inferred from Morro Bay salt marsh sediments
Ellie Broadman, Liam M. Reidy, David Wahl
2022, Anthropocene (38)
Coastal salt marshes and estuaries provide valuable ecosystem services, yet are susceptible to alteration from human activities. Records of past environmental change in these ecosystems can elucidate relationships between human activities, such as land-use practices, and physical and ecological processes, such as sediment accretion...
Changes in waterfowl migration phenologies in central North America: Implications for future waterfowl conservation
Kent Andersson, Craig A. Davis, Grant Harris, David A. Haukos
2022, PLoS ONE (17)
Globally, migration phenologies of numerous avian species have shifted over the past half-century. Despite North American waterfowl being well researched, published data on shifts in waterfowl migration phenologies remain scarce. Understanding shifts in waterfowl migration phenologies along with potential drivers is critical for guiding future conservation efforts. Therefore, we utilized...
Hybrid enrichment of adaptive variation revealed by genotype-environment associations in montane sedges
Richard G.J. Hodel, Robert Massatti, L Lacey Knowles
2022, Molecular Ecology (31) 3722-3737
The role of hybridization in diversification is complex and may result in many possible outcomes. Not only can hybridization produce new lineages, but those lineages may contain unique combinations of adaptive genetic variation derived from parental taxa that allow hybrid-origin lineages to occupy unique environmental space...
Heterogeneity of recreationists in a park and protected area
O.A. DaRugna, M.A. Kaemingk, C.J. Chizinski, Kevin L. Pope
2022, PLoS ONE (17)
Limited information and resources have caused many parks and protected areas (PPAs) to functionally manage recreationists as a single homogeneous group, despite potential negative social and ecological consequences. We aimed to evaluate the homogeneity of recreationists at the Valentine National Wildlife Refuge (NWR) by 1) quantifying frequencies of consumptive (i.e.,...
Age of the late Holocene Bonneville landslide and submerged forest of the Columbia River Gorge, Oregon and Washington, USA, by radiocarbon dating
Nathaniel D. Reynolds, Jim E. O'Connor, Patrick T. Pringle, Alex C. Bourdeau, Robert L. Schuster
2022, Quaternary Research (109) 65-82
The late Holocene Bonneville landslide, a 15.5 km2 rockslide-debris avalanche, descended 1000 m from the north side of the Columbia River Gorge and dammed the Columbia River where it bisects the Cascade Range of Oregon and Washington, USA. The landslide, inundation, and overtopping created persistent geomorphic, ecologic,...
Controlling invasive fish in fluctuating environments: Model analysis of common carp (Cyprinus carpio) in a shallow lake
James B Pearson, J. Ryan Bellmore, Jason B. Dunham
2022, Ecosphere (13)
Climate change can act to facilitate or inhibit invasions of non-native species. Here, we address the influence of climate change on control of non-native common carp (hereafter, carp), a species recognized as one of the “world's worst” invaders across the globe. Control of this species is...
What common-garden experiments tell us about climate responses in plants
Susanne Schwinning, Christopher J. Lorti, Todd Esque, Lesley A. DeFalco
2022, Journal of Ecology (110) 986-996
Common garden experiments are indoor or outdoor plantings of species or populations collected from multiple distinct geographic locations, grown together under shared conditions. These experiments examine a range of questions for theory and application using a variety of methods for analysis. The eight papers of this special feature comprise...
Minimizing extinction risk in the face of uncertainty: Developing conservation strategies for 2 rapidly declining forest bird species on Kaua‘i Island
Eben H. Paxton, Lisa H. Crampton, John Vetter, Megan Laut, Lainie Berry, Steve Morey
2022, Wildlife Society Bulletin (46)
Many species around the world are declining precipitously as a result of multiple threats and changing climate. Managers tasked with protecting species often face difficult decisions in regard to identifying which threats should be addressed, given limited resources and uncertainty in the success of any identified...
Permeability of methane hydrate-bearing sandy silts in the deep-water Gulf of Mexico (Green Canyon Block 955)
Yi Fang, Peter Flemings, Hugh Daigle, Stephen C. Phillips, Joshua O’Connell
2022, AAPG Bulletin (106) 1071-1100
Permeability is one of the most crucial properties governing fluid flow in methane hydrate reservoirs. This paper presents a comprehensive permeability analysis of hydrate-bearing sandy silt pressure-cored from Green Canyon Block 955 (GC 955) in the deep-water Gulf of Mexico. We developed an experimental protocol to systematically characterize the...
Toxicity of wildland fire-fighting chemicals in pulsed exposures to rainbow trout and fathead minnows
Holly J. Puglis, Michael G. Iacchetta, Christina M. Mackey
2022, Environmental Toxicology and Chemistry (41) 1711-1720
Intrusions of fire-fighting chemicals in streams can result from containment and suppression of wildfires and may be harmful to native biota. We investigated the toxicity of seven current-use fire-fighting chemicals to juvenile rainbow trout (Oncorhynchus mykiss) and fathead minnows (Pimephales promelas) by simulating chemical intrusions under variable field conditions to...
Ignoring species availability biases occupancy estimates in single-scale occupancy models
Graziella Vittoria DiRenzo, David A. W. Miller, Evan H. Campbell Grant
2022, Methods in Ecology and Evolution (13) 1790-1804
Most applications of single-scale occupancy models do not differentiate between availability and detectability, even though species availability is rarely equal to one. Species availability can be estimated using multi-scale occupancy models; however, for the practical application of multi-scale occupancy models, it can be unclear what a robust sampling design...
Economic benefits supported by surface water in eastern Oregon’s Harney Basin
Christopher Huber, Matthew Flyr, Lucas Bair
2022, Western Economics Forum (20) 30-42
The Harney Basin is a closed river basin in southeastern Oregon. Surface water in the basin is used for a variety of social, economic, and ecological benefits. While some surface water uses compete with one another, others are complementary or jointly produce multiple beneficial outcomes. The objective of this study...
Abrupt quaternary ocean-ice events in the Arctic: Evidence from the ostracode rabilimis
Thomas M. Cronin, Laura Gemery, Baylee M. Olds Olds, Alexa Regnier, Robert Poirier, Sienna Sui
2022, Micropaleontology (68) 233-242
The Arctic Ocean has experienced orbital and millennial-scale climate oscillations over the last 500 kilo-annum (ka) involving massive changes in global sea level and components of the Arctic cryosphere, including sea-ice cover, land-based ice sheets and ice shelves. Although these climate events are only partially understood, micropaleontological studies utilizing...
Scientific results of the Hydrate-01 Stratigraphic Test Well Program, Western Prudhoe Bay Unit, Alaska North Slope
Roy Boswell, Timothy S. Collett, Koji Yamamoto, Norihiro Okinaka, Robert Hunter, Kiyofumi Suzuki, Machiko Tamaki, Jun Yoneda, David Itter, Seth S. Haines, Evgeniy Myshakin, George Moridis
2022, Journal of Energy and Fuels (36) 5167-5184
The United States Department of Energy, the MH21-S Research Consortium of Japan, and the United States Geological Survey are collaborating to enable gas hydrate scientific drilling and extended-duration reservoir response testing on the Alaska North Slope. To feasibly execute such a test, a location is required...
Re-evaluating invasive species in degraded ecosystems: A case study of red-eared slider turtles as partial ecological analogs
Marc Dupuis-Desormeaux, Jeffrey E. Lovich, J. Whitfield Gibbons
2022, Discover Sustainability (3)
Exotic species are often vilified as "bad" without consideration of the potential they have for contributing to ecological functions in degraded ecosystems. The red-eared slider turtle (RES) has been disparaged as one of the worst invasive species. Based on this review, we suggest that RES contribute some ecosystem functions in...
Barkley Canyon gas hydrates: A synthesis based on two decades of seafloor observation and remote sensing
M. Reidel, M. Scherwath, M. Romer, C. K. Paull, E. Lundsten, D. W. Caress, P. Brewer, John Pohlman, L. L. Lapham, N. R. Chapman, M. Whiticar, G. D. Spence, R. Enkin, K. Douglas
2022, Frontiers in Earth Science (10)
Barkley Canyon is one of the few known sites worldwide with the occurrence of thermogenic gas seepage and formation of structure-II and structure-H gas hydrate mounds on the seafloor. This site is the location of continuous seafloor monitoring as part of the Ocean Networks Canada (ONC) cabled observatory off the...
Susceptibility of beavers to chronic wasting disease
Allen Jeffrey Herbst, Serene Wohlgemuth, Jing Yang, Andrew Castle, Diana Martinez Moreno, Alicia Otero, Judd M. Aiken, David Westaway, Debbie I. McKenzie
2022, Biology (11)
Chronic wasting disease (CWD) is a contagious, fatal, neurodegenerative prion disease of cervids. The expanding geographical range and rising prevalence of CWD are increasing the risk of pathogen transfer and spillover of CWD to non-cervid sympatric species. As beavers have close contact with environmental and food sources...
Complex magmatic-tectonic interactions during the 2020 Makushin Volcano, Alaska, earthquake swarm
Federica Lanza, Diana Roman, John Power, Clifford H. Thurber, Thomas Hudson
2022, Earth and Planetary Science Letters (587)
On June 15, 2020, at 21:16 UTC, a locally-felt earthquake of magnitude 4.2 struck Unalaska Island, Alaska, ∼15 km west of the town of Unalaska and the large fishing port of Dutch Harbor. The event was followed by a M4.1 earthquake at 00:34 UTC and several M3+ aftershocks, initiating a prolific...
Sandhill crane colt survival in Minnesota
William J. Severud, David Wolfson, John Fieberg, David E. Andersen
2022, Journal of Fish and Wildlife Management (13) 494-501
Age-structured population models require reliable estimates of cohort-specific survival rates, yet vital rates of younger age classes are often difficult to estimate because of the logistical challenges of monitoring young animals. As part of a study of sandhill cranes Antigone canadensis in the zone of contact between breeding distributions of the Eastern...
Neuroendocrine regulation of plasma cortisol levels during smoltification and seawater acclimation of Atlantic salmon
Brett M Culbert, Amy M. Regish, Daniel J Hall, Stephen D. McCormick, Nicholas J. Bernier
2022, Frontiers in Endocrinology (13)
Diadromous fishes undergo dramatic changes in osmoregulatory capacity in preparation for migration between freshwater and seawater. One of the primary hormones involved in coordinating these changes is the glucocorticoid hormone, cortisol. In Atlantic salmon (Salmo salar), cortisol levels increase during the spring smoltification period prior to seawater migration; however, the...
Range-wide persistence of the endangered arroyo toad (Anaxyrus californicus) for 20+ years following a prolonged drought
Cynthia Joan Hitchcock, Elizabeth Gallegos, Adam R. Backlin, Russell Barabe, Peter H. Bloom, Kimberly Boss, Cheryl S. Brehme, Christopher W. Brown, Denise Clark, Elizabeth R. Clark, Kevin Cooper, Julie Donnell, Edward L Ervin, Peter Famolaro, Kim M. Guilliam, Jaquelyn Hancock, Nicholas Hess, Steven Howard, Valerie Hubbartt, Patrick Lieske, Robert E. Lovich, Tritia Matsuda, Katherin Meyer-Wilkins, Kamarul Muri, Barry Nerhus, Jeffrey A. Nordland, Brock Ortega, Robert Packard, Ruben Ramirez, Sam C. Stewart, Samuel Sweet, Manna L. Warburton, Jeffrey Wells, Ryan Winkleman, Kirsten Winter, Brian Zitt, Robert N. Fisher
2022, Ecology and Evolution (12)
Prolonged drought due to climate change has negatively impacted amphibians in southern California, U.S.A. Due to the severity and length of the current drought, agencies and researchers had growing concern for the persistence of the arroyo toad (Anaxyrus californicus), an endangered endemic amphibian in this region. Range-wide surveys for this...
Great diversity of KSα sequences from bat-associated microbiota suggests novel sources of uncharacterized natural products
Paris S. Hamm, Jennifer J.M. Hathaway, Ara S. Winter, Nicole A. Caimi, Debbie C. Buecher, Ernest W. Valdez, Diana E. Northup
2022, FEMS Microbiology Ecology (3)
Polyketide synthases (PKSs) are multidomain enzymes in microorganisms that synthesize complex, bioactive molecules. PKS II systems are iterative, containing only a single representative of each domain: ketosynthase alpha (KSα">α�), ketosynthase beta and the acyl carrier protein....
Resource selection and species interactions between native and non-native fishes in a simulated stream system
Philip R. Branigan, Michael C. Quist, Bradley Shepard, Susan Ireland
2022, Fisheries Management and Ecology (29) 627-637
Effective fishery management necessitates understanding of resource partitioning by fishes that inhabit complex systems composed of biotic and abiotic features. Evaluations of non-native species introductions have continually demonstrated adverse effects associated with abundance and distribution of native fishes. Therefore, understanding resource selection and interactions between native and non-native species is...
