Evidence of increased mussel abundance related to the Pacific marine heatwave and sea star wasting
Sarah Beth Traiger, James L. Bodkin, Heather Coletti, Brenda Ballachey, Dean Thomas, Daniel Esler, Katrin Iken, Brenda Konar, Mandy Lindeberg, Daniel Monson, Brian H. Robinson, Robert M. Suryan, Ben Weitzman
2022, Marine Ecology (43)
Mussels occupy a key middle trophic position in nearshore food webs linking primary producers to predators. Climate-related environmental changes may synergistically combine with changes in predator abundance to affect intertidal ecosystems. We examined the influence of two major events on mussel (Mytilus trossulus) abundance in the northern Gulf of Alaska:...
Relocated beaver can increase water storage and decrease stream temperature in headwater streams
Benjamin J. Dittbrenner, Jason W. Schilling, Christian E. Torgersen, Joshua J. Lawler
2022, Ecosphere (13)
Many areas are experiencing increasing stream temperatures due to climate change, and some are experiencing reduced summer stream flows and water availability. Because dam building and pond formation by beaver can increase water storage, stream cooling, and riparian ecosystem resilience, beaver have been proposed as a potential climate adaption tool....
A phylogeny based on cytochrome-c oxidase gene sequences identifies sympatric Ichthyophonus genotypes in the NE Pacific Ocean
Jacob L. Gregg, Paul Hershberger, Abigail S. Neat, Hiruni T. Jayasekera, Jayde A. Ferguson, Rachel L. Powers, Maureen K. Purcell
2022, Diseases of Aquatic Organisms (150) 61-67
ABSTRACT: In recent decades, evidence has accumulated to suggest that the widespread and highly variable parasite Ichthyophonus hoferi is actually a species complex. Highly plastic morphology and a general lack of defining structures has contributed to the likely underestimate of biodiversity within this group. Molecular methods are a logical next step...
Ten-year ecological responses to fuel treatments within semiarid Wyoming big sagebrush ecosystems
David A. Pyke, Scott Shaff, Jeanne C. Chambers, Eugene W. Schupp, Beth A. Newingham, Margaret L Gray, Lisa M. Ellsworth
2022, Ecosphere (13)
Sagebrush ecosystems of western North America are threatened by invasive annual grasses and wildfires that can remove fire-intolerant shrubs for decades. Fuel reduction treatments are used ostensibly to aid in fire suppression, conserve wildlife habitat, and restore historical fire regimes, but long-term ecological impacts of these treatments are not clear....
Prioritizing pharmaceutical contaminants in Great Lakes tributaries using risk-based screening techniques
Matthew A. Pronschinske, Steven R. Corsi, Laura A. DeCicco, Edward Furlong, Gerald T. Ankley, Brett R. Blackwell, Daniel L. Villeneuve, Peter L. Lenaker, Michelle A. Nott
2022, Environmental Toxicology and Chemistry (41) 2221-2239
In a study of 44 diverse sampling sites across 16 Great Lakes tributaries, 110 pharmaceuticals were detected of 257 monitored. The present study evaluated the ecological relevance of detected chemicals and identified heavily impacted areas to help inform resource managers and guide future investigations. Ten pharmaceuticals (caffeine, nicotine, albuterol, sulfamethoxazole,...
Divergent successional trajectories of soil seed bank and post-fire vegetation in a semiarid oak forest: Implications for post-fire ecological restoration
Sina Attar Roshan, Mehdi Heydari, Alexander Wait, S.M. Mijan Uddin, Manuel Esteban Lucas-Borja, Jon Keeley
2022, Ecological Engineering (182)
Wildfires are a major disturbance in forest ecosystems around the world and may lead to changes in vegetation succession trajectories. This study examined the impact of time since wildfires on the successional gradients of the degraded Zagros semi-arid oak forest in Iran....
Root-mean-square error (RMSE) or mean absolute error (MAE): When to use them or not
Timothy O. Hodson
2022, Geoscientific Model Development (15) 5481-5487
The root-mean-squared error (RMSE) and mean absolute error (MAE) are widely used metrics for evaluating models. Yet, there remains enduring confusion over their use, such that a standard practice is to present both, leaving it to the reader to decide which is more relevant. In a recent reprise to the...
Thermophysical and compositional properties of paleobedforms on Mars
Aaron R. Weintraub, Christopher S. Edwards, Matthew Chojnacki, Lauren A. Edgar, Lori K. Fenton, Sylvain Piqueux, Amber L. Gullikson
2022, Journal of Geophysical Research - Planets (127)
Bedforms on Earth and Mars are often preserved in the rock record in the form of sedimentary rock with distinct cross-bedding. On rare occasions, the full-surface geometry of a bedform can be preserved through burial and lithification. These features, known as paleobedforms, are found in a variety...
North Dakota and Landsat
U.S. Geological Survey
2022, Fact Sheet 2022-3053
The State of North Dakota once did not figure prominently in the Nation’s economy. The sparsely populated State supported food production, and hunters and anglers were drawn to its lakes, rivers, and wide-open spaces, but its economy was overshadowed by that of other States. However, the State and its prairie...
Using piecewise regression to identify biological phenomena in biotelemetry datasets
David W. Wolfson, David E. Andersen, John R. Fieberg
2022, Journal of Animal Ecology (91) 1755-1769
1. Technological advances in the field of animal tracking have greatly expanded the potential to remotely monitor animals, opening the door to exploring how animals shift their behavior over time or respond to external stimuli. A wide variety of animal-borne sensors can provide information on an animal’s location, movement characteristics,...
Indiana and Landsat
U.S. Geological Survey
2022, Fact Sheet 2022-3049
Natural resources have always been a strength for Indiana. Once largely covered by forest, the State now includes a mix of forest, farmland, wetlands, and small lakes. In fact, farms and forested areas make up more than 80 percent of the land. The Ohio River forms the southern border, and...
Nuevos datos: Avalancha de escombros de Acajutla, volcán Santa Ana
Angela V. Garcia, Christopher Harpel, Walter Hernandez, Demetrio Escobar, Luis E. Mixco, Charles Lewis, Linda Scott Cummings
2022, Conference Paper, Memoria, XIV congreso geologica de America Central & VII congreso geologico nacional
The Acajutla debris-avalanche deposit is dated to about 40,000 cal BP. The dating is based on two 14C dates on pieces of wood from the debris-avalanche deposit recovered from a core at the Santa Águeda School Center. The debris-avalanche deposit overlies a 1.2-m-thick paleosol and four ash layers. One...
Tephrochronology of the Miocene Monterey and Modelo Formations, California
Jeffrey R. Knott, Andrei M. Sarna-Wojcicki, John A. Barron, Elmira Wan, Nancy Heizler, Priscilla Martinez
2022, GSA Special Papers
Tuff beds have been known in the Miocene Monterey and Modelo Formations since the initial descriptions; however, age control and correlation is predominantly biostratigraphy. Here we combine tephrochronology and biostratigraphy in order to provide numerical age control for eight sedimentary sequences of the Monterey and Modelo Formations from Monterey, California...
The effects of earthquake experience on intentions to respond to Earthquake Early Warnings
Julia S. Becker, Lauren Vinnell, Sara K. McBride, K. Nakayachi, Emma Doyle, Sally H. Potter, Ann Bostrom
2022, Frontiers in Communications (7)
Warning systems are essential for providing people with information so they can take protective action in response to perils. Systems need to be human-centered, which requires an understanding of the context within which humans operate. Therefore, our research sought to understand the human context for Earthquake Early Warning (EEW) in...
Assessing spatial transferability of a random forest metamodel for predicting drainage fraction
Elisa Bjerre, Michael N. Fienen, Raphael Schneider, Julian Koch, Anker L. Højberg
2022, Journal of Hydrology (612)
Fully distributed hydrological models are widely used in groundwater management, but model speed and data requirements impede their use for decision support purposes. Metamodels provide a simpler and faster model which emulates the underlying complex model using machine learning techniques. However, metamodel predictions beyond the...
Riparian buffers provide refugia during secondary forest succession
Michelle E. Thompson, Brian J. Halstead, Maureen A. Donnelly
2022, Diversity and Distributions (28) 2008-2019
AimSecondary forests regenerating from human disturbance are increasingly becoming a predominant forest type in many regions, and they play a significant role in forest community dynamics. Understanding the factors that underlie the variation in species responses during secondary succession is important for understanding community assembly and biodiversity...
Evapotranspiration covers at uranium mill tailings sites
Todd Caldwell, Sarah Tabatabai, Jena Huntington, Gwendolyn Elizabeth Davies, Mark Fuhrmann
2022, Vadose Zone Journal (21)
Waste isolation is a key strategy for mitigating risk from municipal solid waste (MSW) and hazardous waste streams. Conventional covers at MSW facilities are designed for a 30-yr post-closure period where compacted soils and geosynthetics are used to minimize percolation into buried waste. Recently, evapotranspiration (ET) covers have shown beneficial...
Scanning the horizon for invasive plant threats using a data-driven approach
Amy E Kendig, Susan Canavan, Patti J Anderson, S Luke Flory, Lyn A Gettys, Doria R. Gordon, Basil V Iannone, John M Kunzer, Tabitha Petri, Ian Pfingsten, Deah Lieurance
2022, NeoBiota (74) 129-154
Early detection and eradication of invasive plants are more cost-effective than managing well-established invasive plant populations and their impacts. However, there is high uncertainty around which taxa are likely to become invasive in a given area. Horizon scanning that combines a data-driven approach with rapid risk assessment...
Results of automated scanning electron microscope (SEM) analyses of rock and stream sediment samples from the Taurus porphyry copper deposit area, Tanacross quadrangle, eastern Alaska
Karen D. Kelley, Katharina Pfaff, Garth E. Graham
2022, Open-File Report 2022-1046
Numerous porphyry copper-molybdenum-gold and epithermal deposits define a belt that extends from Eastern Alaska to western Yukon, Canada. An orientation study conducted near the Taurus porphyry deposit was designed to test methods that require minimal sample collection, preparation, and analytical time to determine the viability of indicator mineral studies as...
Marine minerals in Alaska — A review of coastal and deep-ocean regions
Amy Gartman, Kira Mizell, Douglas C. Kreiner
2022, Professional Paper 1870
Minerals occurring in marine environments span the globe and encompass a broad range of mineral categories, forming within varied geologic and oceanographic settings. They occur in coastal regions, either from the continuation or mechanical reworking of terrestrial mineralization, as well as in the deep ocean, from diagenetic, hydrogenetic, and hydrothermal...
Large-scale distribution models for optimal prediction of Eastern black rail habitat within tidal ecosystems
Bryan S. Stevens, Courtney J. Conway, Kirsten Luke, Aimee Weldon, Christy Hand, Amy Schwarzer, Fletcher Smith, Craig Watson, Bryan D. Watts
2022, Global Ecology and Conservation (38)
Eastern black rails (Laterallus jamaicensis jamaicensis) are among the rarest and least-studied birds in North America and were recently listed as threatened under the U.S. Endangered Species Act. Spatial models that predict habitat quality across the subspecies range are therefore needed to inform conservation, recovery, and monitoring efforts for this rare bird. We...
Alaska focus area definition for data acquisition for potential domestic sources of critical minerals in Alaska for antimony, barite, beryllium, chromium, fluorspar, hafnium, magnesium, manganese, uranium, vanadium, and zirconium
Douglas C. Kreiner, James V. Jones III, George N. Case
2022, Open-File Report 2019-1023-E
Phase 3 of the Earth Mapping Resources Initiative (Earth MRI) focuses on geologic belts that are favorable for hosting mineral systems that could contain the critical minerals antimony, barite, beryllium, chromium, fluorspar, hafnium, magnesium, manganese, uranium, vanadium, and zirconium. Prior phases of the Earth MRI program in Alaska focused...
Focus areas for data acquisition for potential domestic resources of 13 critical minerals in the conterminous United States and Puerto Rico — Antimony, barite, beryllium, chromium, fluorspar, hafnium, helium, magnesium, manganese, potash, uranium, vanadium, and zirconium
Jane M. Hammarstrom, Connie L. Dicken, Laurel G. Woodruff, Allen K. Andersen, Sean T. Brennan, Warren C. Day, Benjamin J. Drenth, Nora K. Foley, Susan Hall, Albert H. Hofstra, Anne E. McCafferty, Anjana K. Shah, David A. Ponce
2022, Open-File Report 2019-1023-D
The Earth Mapping Resources Initiative (Earth MRI) is conducted in phases to identify areas for acquiring new geologic framework data to identify potential domestic resources of the 35 mineral materials designated as critical minerals for the United States. This report describes the data sources and summary results for 13 critical...
Africa’s drylands in a changing world: Challenges for wildlife conservation under climate and land-use changes in the Greater Etosha Landscape
Wendy Christine Turner, Stéphanie Périquet, Claire E. Goelst, Kimberlie B. Vera, Elissa Z. Cameron, Kathleen A. Alexander, Jerrold L. Belant, Claudine C. Cloete, Pierre du Preez, Wayne M. Getz, Robyn S. Hetem, Pauline L. Kamath, Marthin K. Kasaona, Monique Mackenzie, John Mendelsohn, John K.E. Mfune, Jeff Muntifering, Ruben Portas, H. Ann Scott, W. Maartin Strauss, Wilferd Versfeld, Bettina Wachter, George Wittemyer, J. Werner Kilian
2022, Global Ecology and Conservation (38)
Proclaimed in 1907, Etosha National Park in northern Namibia is an iconic dryland system with a rich history of wildlife conservation and research. A recent research symposium on wildlife conservation in the Greater Etosha Landscape (GEL) highlighted increased concern of how...
Drought and nutrient pollution produce multiple interactive effects in stream ecosystems
R.J. Fournier, Daniel D. Magoulick
2022, PLoS ONE (17)
Drought and nutrient pollution can affect the dynamics of stream ecosystems in diverse ways. While the individual effects of both stressors are broadly examined in the literature, we still know relatively little about if and how these stressors interact. Here, we performed a mesocosm experiment that explores the compounded effects...
