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...
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...
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...
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...
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....
Interannual snow accumulation variability on glaciers derived from repeat spatially extensive ground-penetrating radar surveys
Daniel 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...
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...
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...
A reinterpretation of “Homing pigeons’ flight over and under low stratus” based on atmospheric propagation modeling of infrasonic navigational cues
Jonathan T. Hagstrum
2019, Journal of Comparative Physiology A (205) 67-78
Pigeons flying above temperature inversion and related low-stratus layers appear to lack important navigational cues, and a reinterpretation of Wagner’s 1978 study suggests that these cues are low-frequency acoustic signals (infrasound). Wagner released homing pigeons above opaque stratus over the Swiss Plateau to determine whether they...
The spatial scale of biotic change in Chihuahuan Desert fish assemblages
C. M. Taylor, S. Miyazono, C.A. Cheek, R.J. Edwards, Reynaldo Patino
2019, Freshwater Biology (64) 222-232
1. We examined riverine desert fish assemblages in the Chihuahuan Desert, USA at multiple spatial scales of similarity to assess long-term changes to assemblage distinctiveness, identify individual species responsible for changes, and determine the importance of geographic context and species resolution in interpreting patterns of change. 2. We used a well-documented...
Evaluating potential distribution of high-risk aquatic invasive species in the water garden and aquarium trade at a global scale based on current established populations
Amanda M. West, Catherine S. Jarnevich, Pam Fuller, Nicholas E. Young
2019, Risk Analysis (39) 1169-1191
Aquatic non‐native invasive species are commonly traded in the worldwide water garden and aquarium markets, and some of these species pose major threats to the economy, the environment, and human health. Understanding the potential suitable habitat for these species at a global scale and at regional scales can inform risk...
Spatiotemporal analysis of the Foreshock-Mainshock-Aftershock sequence of the 6 July 2017 M5.8 Lincoln, Montana, earthquake
Nicole D McMahon, William L. Yeck, Michael C. Stickney, Richard C. Aster, Hilary R Martens, Harley M. Benz
2019, Seismological Research Letters (9) 131-139
A MW 5.8 earthquake occurred on 6 July 2017 at 12.2 km depth, 11 km southeast of Lincoln in west central Montana. No major damage or injuries were reported; however, the widely felt mainshock generated a prolific aftershock sequence with more than 1200 located events through the end of 2017....
Validating the use of object-based image analysis to map commonly-recognized landform features in the United States
Samantha T. Arundel, Gaurav Sinha
2019, Cartography and Geographic Information Science (46) 441-455
The U.S. Geological Survey (USGS) National Geospatial Program (NGP) seeks to i) create semantically-accessible terrain features from the pixel-based 3D Elevation Program (3DEP) data, and ii) enhance the usability of the USGS Geographic Names Information System (GNIS) by associating boundaries with GNIS features whose spatial representation is currently limited to...
Modeling landowner interactions and development patterns at the urban fringe
Jennifer Koch, Monica Dorning, Derek B. Van Berkel, Scott M. Beck, Georgina M. Sanchez, Ashwin Shashidharan, Lindsey S. Smart, Qiang Zhang, Jordan W. Smith, Ross K. Meentemeyer
2019, Landscape and Urban Planning (182) 101-113
Population growth and unrestricted development policies are driving low-density urbanization and fragmentation of peri-urban landscapes across North America. While private individuals own most undeveloped land, little is known about how their decision-making processes shape landscape-scale patterns of urbanization over time. We introduce a hybrid agent-based modeling (ABM) – cellular automata...
Integrating landscape simulation models with economic and decision tools for invasive species control
Catherine Cullinane Thomas, Helen Sofaer, Sarah A. Cline, Catherine S. Jarnevich
2019, Management of Biological Invasions (10) 6-22
In managing invasive species, land managers and policy makers need information to help allocate scarce resources as efficiently and effectively as possible. Decisions regarding treatment methods, locations, effort, and timing can be informed by the integration of landscape simulation models with economic tools. State and transition simulation models align with...
Effects of prescribed fire on San Francisco gartersnake survival and movement
Brian J. Halstead, Michelle E. Thompson, Melissa Amarello, Jeffrey J. Smith, Glenn D. Wylie, Eric J. Routman, Michael L. Casazza
2019, Journal of Wildlife Management (83) 231-240
The application of fire is prescribed for management of habitats for many plant and animal communities, but its effects on herpetofauna are diverse and remain poorly understood. To date no studies have examined the effects of prescribed fire on endangered San Francisco gartersnake (Thamnophis sirtalis tetrataenia) populations, despite a call...
Climate change implications for irrigation and groundwater in the Republican River Basin, U.S.A.
Gengxin Ou, F. Munoz-Arriola, D. R. Uden, D. R. Martin, Craig R. Allen, N. Shank
2019, Climate Change (151) 303-316
This study investigates the influence of climate change on groundwater availability, and thereby, irrigation across political boundaries within the United States’ High Plains aquifer. A regression model is developed to predict changes in irrigation according to predicted changes in precipitation and temperature from a downscaled dataset of 32 general circulation...
