Optimal spatial allocation of control effort to manage invasives in the face of imperfect detection and misclassification
Mathieu Bonneau, Julien Martin, Nathalie Peyrard, LeRoy Rodgers, Christina M. Romagosa, Fred A. Johnson
2019, Ecological Modelling (392) 108-116
Imperfect detection and misclassification errors are often ignored in the context of invasive species management. Here we present an approach that combines spatially explicit models and an optimization technique to design optimal search and destroy strategies based on noisy monitoring observations. We focus on two invasive plants, melaleuca (Melaleuca quinquenervia)...
C–O stable isotope geochemistry and 40Ar/39Ar geochronology of the Bear Lodge carbonatite stockwork, Wyoming, USA
Allen K. Andersen, Peter B. Larson, Michael A. Cosca
2019, LITHOS (324-324) 640-660
The carbonatite dike swarm and vein stockwork at the center of the Paleogene Bear Lodge alkaline complex (BLAC), Wyoming, USA, is host to diverse REE mineral assemblages that are largely a result of subsolidus modification and REE redistribution. Pseudomorphic replacement of primary burbankite by an assemblage of ancylite, strontianite, and barite is the result of interaction with late-stage hydrothermal fluids that...
Overview of spirit microscopic imager results
Kenneth E. Herkenhoff, Steve W Squyres, Raymond E. Arvidson, Shoshanna B Cole, Rob Sullivan, Aileen Yingst, Nathalie Cabrol, Ella Lee, Janet Richie, Robert M. Sucharski, Fred J. Calef, James F. Bell III, Mary Chapman, Paul Geissler, Lauren A. Edgar, Brenda Franklin, Joel A. Hurowitz, Elsa Jensen, Jeffrey R. Johnson, Randolph L. Kirk, Peter Lanagan, Kevin Mullins, Craig Leff, Justin Maki, Bonnie L. Redding, Melissa Rice, Michael H. Sims, Annette Sunda, Nicole Spanovich, Richard Springer, Laurence A. Soderblom, Alicia Vaughan
2019, Journal of Geophysical Research E: Planets (124) 528-584
This paper provides an overview of Mars Exploration Rover Spirit Microscopic Imager (MI) operations and the calibration, processing, and analysis of MI data. The focus of this overview is on the last five Earth years (2005–2010) of Spirit's mission in Gusev crater, supplementing the previous overview of the first 450 sols of the Spirit MI...
Modeling White Sucker (Catostomus commersonii) populations to assess commercial harvest influence on age structure
Joseph D. Zydlewski, Meg Begley, Stephen Coghlan
2019, Journal of Freshwater Ecology (33) 413-428
Commercial harvest of White Suckers Catostomus commersonii for bait in the American Lobster Homarus americanus industry is minimally regulated in Maine and there are concerns as to the influence of increasing harvest. We built a population model using parameters (i.e. age-specific mortality, age at maturity, and size-specific fecundity) from literature...
Modelling effects of invasive species and drought on crayfish extinction risk and population dynamics
Allyson N. Yarra, Daniel D. Magoulick
2019, Aquatic Conservation: Marine and Freshwater Ecosystems (29) 1-11
Hydrological alteration, which may be exacerbated by climate change, is known to facilitate aquatic species invasion. Altered hydrology, invasive species, and the additive effects of these stressors pose a threat to aquatic biodiversity.Understanding extinction risk in the context of these stressors is crucial for prioritizing conservation efforts. As case...
Bioclimatic envelopes for individual demographic events driven by extremes: Plant mortality from drought and warming
Darin J. Law, Henry D. Adams, David D. Breshears, Neil S. Cobb, John B. Bradford, Chris B. Zou, Jason P. Field, Alfonso A. Gardea, A. Park Williams, Travis E. Huxman
2019, International Journal of Plant Sciences (80) 53-62
The occurrence of plant species across the globe is largely constrained by climate. Ecologists use plant-climate relationships such as bioclimatic envelopes and related niche models to determine potential environmental conditions promoting probable species occurrence. Traditionally bioclimatic envelopes either exclude disturbance explicitly, or only include disturbance as infrequent and smaller scale...
The extreme space weather event in September 1909
Hisashi Hayakawa, Yusuke Ebihara, Edward W. Cliver, Kentaro Hattori, Shin Toriumi, Jeffrey J. Love, Norio Umemura, Kosuke Namekata, Takahito Sakaue, Takuya Takahashi, Kazunari Shibata
2019, Monthly Notices of the Royal Astronomical Society (484) 4083-4099
We evaluate worldwide low-latitude auroral activity associated with the great magnetic storm of September 1909 for which a minimum Dst value of −595 nT has recently been determined. From auroral observations, we calculate that the equatorward boundary of the auroral oval in the 1909 event was in the range from 31°–35° invariant...
Extreme value-based methods for modeling elk yearly movements
Dhanushi A. Wijeyakulasuriya, Ephraim M. Hanks, Benjamin A. Shaby, Paul C. Cross
2019, Journal of Agricultural, Biological, and Environmental Statistics (24) 73-91
Species range shifts and the spread of diseases are both likely to be driven by extreme movements, but are difficult to statistically model due to their rarity. We propose a statistical approach for characterizing movement kernels that incorporate landscape covariates as well as the potential for heavy-tailed distributions. We used...
The future of recreational fisheries: Advances in science, monitoring, management, and practice
J. W. Brownscombe, K. Hyder, W. M. Potts, K. V. Wilson, Kevin L. Pope, A. J. Danylchuk, S. J. Cooke, Adrian Clarke, R. Arlinghaus, J. R. Postel
2019, Fisheries Research (211) 247-255
Recreational fisheries (RF) are complex social-ecological systems that play an important role in aquatic environments while generating significant social and economic benefits around the world. The nature of RF is diverse and rapidly evolving, including the participants, their priorities and behaviors, and the related ecological impacts and social and economic...
Early arc development recorded in Permian–Triassic plutons of the northern Mojave Desert region, California, USA
Robinson Cecil, Mary A. Ferrer, Nancy R. Riggs, Kathie Marsaglia, Andrew R. C. Kylander-Clark, Mihai N. Ducea, Paul Stone
2019, Geological Society of America Bulletin (131) 749-765
Permian–Middle Triassic plutons in the northern Mojave Desert, USA, are emplaced into the cryptic El Paso terrane, which is characterized by a northwest-striking belt of deep marine eugeoclinal strata juxtaposed against Proterozoic basement and its miogeoclinal cover. Fourteen new zircon U-Pb ages from the El...
Influence of climate, post‐treatment weather extremes, and soil factors on vegetation recovery after restoration treatments in the southwestern US
Stella M. Copeland, Seth M. Munson, John B. Bradford, Bradley J. Butterfield
2019, Applied Vegetation Science (22) 85-95
AimsUnderstanding the conditions associated with dryland vegetation recovery after restoration treatments is challenging due to a lack of monitoring data and high environmental variability over time and space. Tracking recovery trajectories with satellite‐based vegetation indices can strengthen predictions of restoration outcomes across broad areas with varying...
Trophic implications of a phenological paradigm shift: Bald eagles and salmon in a changing climate
Madeleine A. Rubenstein, Roger Christophersen, Jason I. Ransom
2019, Journal of Applied Ecology (56) 769-778
Climate change influences apex predators in complex ways, due to their important trophic position, capacity for resource plasticity, and sensitivity to numerous anthropogenic stressors. Bald eagles, an ecologically and culturally significant apex predator, congregate seasonally in high densities on salmon spawning rivers across the Pacific Northwest. One of the...
Spatial variability in ocean-mediated growth potential is linked to Chinook salmon survival
Mark J. Henderson, Jerome Fiechter, David D. Huff, Brian K. Wells
2019, Fisheries Oceanography (28) 334-344
Early ocean survival of Chinook salmon, Oncorhynchus tshawytscha, varies greatly inter-annually and may be the period during which later spawning abundance and fishery recruitment are set. Therefore, identifying environmental drivers related to early survival may inform better models for management and sustainability of salmon in a variable environment....
Europa’s ice tectonics: New insights from physical wax experiments with implications for subduction initiation and global resurfacing processes
Michael W Klasner, Juliane Gross, Sarah Tindall, Roy W. Schlishe, Christopher J. Potter
2019, Icarus (321) 593-607
Jupiter's Moon Europa has one of the youngest geological surfaces in our solar system with an age of 40–90 Ma, implying an intense history of resurfacing. The surface of Europa indeed shows abundant evidence of tectonic deformation related to extension, strike-slip, and shortening. However, observed features related to shortening are scarce compared with...
Interannual snow accumulation variability on glaciers derived from repeat spatially extensive ground-penetrating radar surveys
Daniel J McGrath, Louis Sass, Shad O’Neel, Christopher J. McNeil, Salvatore G Candela, Emily Baker, Hans P. Marshall
2019, The Cryosphere (12) 3617-3633
There is significant uncertainty regarding the spatiotemporal distribution of seasonal snow on glaciers, despite being a fundamental component of glacier mass balance. To address this knowledge gap, we collected repeat, spatially extensive high-frequency ground-penetrating radar (GPR) observations on two glaciers in Alaska for five consecutive years. GPR measurements showed steep...
Uncertainty in quantitative analyses of topographic change: Error propagation and the role of thresholding
Scott W. Anderson
2019, Earth Surface Processes and Landforms (44) 1015-1033
Topographic surveys inevitably contain error, introducing uncertainty into estimates of volumetric or mean change based on the differencing of repeated surveys. In the geomorphic community, uncertainty has often been framed as a problem of separating out real change from apparent change due purely to error, and addressed by removing measured...
Distance models as a tool for modelling detection probability and density of native bumblebees
Darin J. McNeil Jr., Clint Otto, Erin L. Moser, Katherine R. Urban-Mead, David E. King, Amanda D. Rodewald, Jeffrey L. Larkin
2019, Journal of Applied Entomology (143) 225-235
Effective monitoring of native bee populations requires accurate estimates of population size and relative abundance among habitats. Current bee survey methods, such as netting or pan trapping, may be adequate for a variety of study objectives but are limited by a failure to account for imperfect detection. Biases due to...
Keeping the crown of the continent connected: An interagency US2 connectivity workshop report
John S. Waller, Tabitha A. Graves
2019, Report
At over 2.5 million acres, Glacier National Park and the Bob Marshall Wilderness complex form one of the largest protected areas in the continental United States. Straddling the Continental Divide, these two areas form a vital linkage between vast areas of public land to the south towards Yellowstone, and contiguous...
Accuracy of methods for reporting inorganic element concentrations and radioactivity in oil and gas wastewaters from the Appalachian Basin, U.S. based on an inter-laboratory comparison.
Travis L. Tasker, William D Burgos, Moses A Ajemigbitse, Nancy E. Lauer, Alen V Gusa, Maksat Kuatbek, Dustin May, Joshua D. Landis, Daniel S. Alessi, Amanda M Johnsen, James M Kaste, Kurt Headrick, Franziska DH Wilke, Mark McNeal, Mark A. Engle, Aaron M. Jubb, Radisav Vidic, Avner Vengosh, Nathaniel R. Warner
2019, Environmental Science: Processes and Impacts (21) 224-241
Accurate and precise analyses of oil and gas (O&G) wastewaters and solids (e.g., sediments and sludge) are important for the regulatory monitoring of O&G development and tracing potential O&G contamination in the environment. In this study, 15 laboratories participated in an inter-laboratory comparison on the chemical characterization of three O&G...
New approach to assessing age uncertainties – The 2300-year varve chronology from Eklutna Lake, Alaska (USA)
David Fortin, Nore Praet, Nicholas P. McKay, Darrell S. Kaufman, Britta J.L. Jensen, Peter J. Haeussler, Casey Buchanan, Marc De Batist
2019, Quaternary Science Reviews (203) 90-101
Developing robust chronological frameworks of lacustrine sediment is central to reconstructing past environmental changes. We present varve chronologies from five sites extending back 2300 years from Eklutna Lake, in the Chugach Mountains of south-central Alaska. The chronologies are built from image analysis of high-resolution photographs...
Reflectance increase from broad beam ion milling of coals and organic-rich shales due to increased surface flatness
Brett J. Valentine, Paul C. Hackley, Javin J. Hatcherian, Jing-Jiang Yu
Javin J. Hatcherian, Jing-Jiang Yu, editor(s)
2019, International Journal of Coal Geology (201) 86-101
Broad ion beam (BIB) milling is useful in organic petrology because it can yield flat sample surfaces and avert the ‘smearing’ of organic matter (OM) that results from traditional mechanical polishing. This potentially makes BIB especially useful in the study of nano-porosity, where even minor mechanical disruption of the...
Linking variability in climate to wetland habitat suitability: Is it possible to forecast regional responses from simple climate measures?
Davis C, Miller D, Evan H. Campbell Grant, Brian Halstead, Patrick M. Kleeman, Susan Walls, William Barichivich
2019, Wetlands Ecology and Management (27) 39-53
Temporary wetlands have value to both ecological and social systems. Interactions between local climate and the surrounding landscape result in patterns of hydrology that are unique to temporary wetlands. These seasonal and annual fluctuations in wetland inundation contribute to community composition and richness. Thus, predicting wetland community responses to environmental...
Evidence for widespread microbivory of endophytic bacteria in roots of vascularplants through oxidative degradation in root cell periplasmic spaces
James F. White, Monica S. Torres, Satish Kumar Verma, Matthew T. Elmore, Kurt P. Kowalski, Kathryn L. Kingsley
2019, Book chapter, PGPR amelioration in sustainable agriculture food security and environmental management
In this chapter we present a hypothesis, and data supporting it, that vascular plants in diverse families possess symbiotic/endophytic bacteria that frequently vector on or within their seeds; seedlings degrade symbiotic bacteria within roots. Evidence of widespread microbivory was found in a survey for intracellular bacteria that we conducted including...
Identification of conservation and restoration priority areas in the Danube River based on the multi-functionality of river-floodplain systems
Andrea Funk, Javier Martinez-Lopez, Florian Borgwardt, Daniel Traunder, Kenneth J. Bagstad, Stefano Balbi, Ainhoa Magrach, Ferdinando Villa, Thomas Hein
2019, Science of the Total Environment (654) 763-777
Large river-floodplain systems are hotspots of biodiversity and ecosystem services but are also used for multiple human activities, making them one of the most threatened ecosystems worldwide. There is wide evidence that reconnecting river channels with their floodplains is an effective measure to increase their multi-functionality, i.e., ecological integrity, habitats for multiple species and the multiple functions and...
Estimating spatial–temporal differences in Chinook salmon outmigration survival with habitat- and predation-related covariates
Mark J. Henderson, Ilysa S. Iglesias, Cyril J. Michel, Arnold J. Ammann, David D. Huff
2019, Canadian Journal of Fisheries and Aquatic Sciences (76) 1549-1561
Low survival rates of Chinook salmon (Oncorhynchus tshawytscha) smolts in California’s Central Valley have been attributed to multiple biological and physical factors, but it is not clear which factors have the largest impact. We used 5 years of acoustic telemetry data for 1709 late-fall Chinook salmon smolts to evaluate the...
