A review of single-sample-based models and other approaches for radiocarbon dating of dissolved inorganic carbon in groundwater
L. F Han, Niel Plummer
2016, Earth-Science Reviews (152) 119-142
Numerous methods have been proposed to estimate the pre-nuclear-detonation 14C content of dissolved inorganic carbon (DIC) recharged to groundwater that has been corrected/adjusted for geochemical processes in the absence of radioactive decay (14C0) - a quantity that is essential for estimation of radiocarbon age of DIC in groundwater. The models/approaches most...
Acadia National Park Climate Change Scenario Planning Workshop summary
Jonathan Star, Nicholas Fisichelli, Alexander Bryan, Amanda Babson, Rebecca Cole-Will, Abraham J. Miller-Rushing
2016, Conference Paper
This report summarizes outcomes from a two-day scenario planning workshop for Acadia National Park, Maine (ACAD). The primary objective of the workshop was to help ACAD senior leadership make management and planning decisions based on up-to-date climate science and assessments of future uncertainty. The workshop was also designed as a...
By-products of porphyry copper and molybdenum deposits
David A. John, Ryan D. Taylor
Philip L. Verplanck, Murray W. Hitzman, editor(s)
2016, Book chapter, Rare earth and critical elements in ore deposits
Porphyry Cu and porphyry Mo deposits are large to giant deposits ranging up to >20 and 1.6 Gt of ore, respectively, that supply about 60 and 95% of the world’s copper and molybdenum, as well as significant amounts of gold and silver. These deposits form from hydrothermal systems that affect...
A comparison of helicopter-borne electromagnetic systems for hydrogeologic studies
Paul A. Bedrosian, Cyril Schamper, Esben Auken
2016, Geophysical Prospecting (64) 192-215
The increased application of airborne electromagnetic surveys to hydrogeological studies is driving a demand for data that can consistently be inverted for accurate subsurface resistivity structure from the near surface to depths of several hundred metres. We present an evaluation of three commercial airborne electromagnetic systems over two test blocks...
Aquatic carbon cycling in the conterminous United States and implications for terrestrial carbon accounting
David Butman, Sarah M. Stackpoole, Edward G. Stets, Cory P. McDonald, David W. Clow, Robert G. Striegl
2016, Proceedings of the National Academy of Sciences of the United States of America (113) 58-63
Inland water ecosystems dynamically process, transport, and sequester carbon. However, the transport of carbon through aquatic environments has not been quantitatively integrated in the context of terrestrial ecosystems. Here, we present the first integrated assessment, to our knowledge, of freshwater carbon fluxes for the conterminous United States, where 106 (range:...
Decision analysis for habitat conservation of an endangered, range-limited salamander
Orin J. Robinson, Conor P. McGowan, J.J. Apodaca
2016, Animal Conservation (19) 561-569
Many species of conservation concern are habitat limited and often a major focus of management for these species is habitat acquisition and/or restoration. Deciding the location of habitat restoration or acquisition to best benefit a protected species can be a complicated subject with competing management objectives, ecological uncertainties and stochasticity....
Application of an extreme winter storm scenario to identify vulnerabilities, mitigation options, and science needs in the Sierra Nevada mountains, USA
Christine M. Albano, Michael D. Dettinger, Maureen McCarthy, Kevin D. Schaller, Toby Wellborn, Dale A. Cox
2016, Natural Hazards (80) 879-900
In the Sierra Nevada mountains (USA), and geographically similar areas across the globe where human development is expanding, extreme winter storm and flood risks are expected to increase with changing climate, heightening the need for communities to assess risks and better prepare for such events. In this case study, we...
Recent and possible future variations in the North American Monsoon
Andrew Hoell, Chris Funk, Mathew Barlow, Shraddhanand Shukla
2016, Book chapter, The monsoons and climate change
The dynamics and recent and possible future changes of the June–September rainfall associated with the North American Monsoon (NAM) are reviewed in this chapter. Our analysis as well as previous analyses of the trend in June–September precipitation from 1948 until 2010 indicate significant precipitation increases over New Mexico and the...
Integrated groundwater management: An overview of concepts and challenges
Anthony J. Jakeman, Olivier Barreteau, Randall J. Hunt, Jean-Daniel Rinaudo, Andrew Ross
Anthony J. Jakeman, Olivier Barreteau, Randall J. Hunt, Jean-Daniel Rinaudo, Andrew Ross, editor(s)
2016, Book chapter, Integrated groundwater management
Managing water is a grand challenge problem and has become one of humanity’s foremost priorities. Surface water resources are typically societally managed and relatively well understood; groundwater resources, however, are often hidden and more difficult to conceptualize. Replenishment rates of groundwater cannot match past and current rates of depletion in...
An evaluation of behavior inferences from Bayesian state-space models: A case study with the Pacific walrus
William S. Beatty, Chadwick V. Jay, Anthony S. Fischbach
2016, Marine Mammal Science (32) 1299-1318
State-space models offer researchers an objective approach to modeling complex animal location data sets, and state-space model behavior classifications are often assumed to have a link to animal behavior. In this study, we evaluated the behavioral classification accuracy of a Bayesian state-space model in Pacific walruses using Argos satellite tags...
Golden-winged Warbler nest-site habitat selection: Chapter 7
Theron M. Terhune II, Kyle R. Aldinger, David A. Buehler, David J. Flaspohler, Jeffrey L. Larkin, John P. Loegering, Katie L. Percy, Amber M. Roth, Curtis G. Smalling, Petra Wood
2016, Book chapter, Golden-winged Warbler ecology, conservation, and habitat management (Studies in Avian Biology, volume 49)
Avian habitat selection occurs at multiple spatial scales to incorporate life history requirements. Breeding habitat of Golden-winged Warblers (Vermivora chrysoptera) is characterized by largely forested landscapes containing natural or anthropogenic disturbance elements that maintain forest patches in early stages of succession. Breeding habitat occurs in a variety of settings, including...
Pinedale glacial history of the upper Arkansas River valley: New moraine chronologies, modeling results, and geologic mapping
Avriel D. Schweinsberg, Jason P. Briner, Ralph R. Shroba, Joseph M. Licciardi, Eric M. Leonard, Keith A. Brugger, Charles M. Russell
2016, Book chapter, Unfolding the Geology of the West
This field-trip guide outlines the glacial history of the upper Arkansas River valley, Colorado, and builds on a previous GSA field trip to the area in 2010. The following will be presented: (1) new cosmogenic 10Be exposure ages of moraine boulders from the Pinedale and Bull Lake glaciations (Marine Isotope...
Local environmental context conditions the impact of Russian olive in a heterogeneous riparian ecosystem
Graham M. Tuttle, Gabrielle L. Katz, Jonathan M. Friedman, Andrew P. Norton
2016, Invasive Plant Science and Management (9) 272-289
Local abiotic and biotic conditions can alter the strength of exotic species impacts. To better understand the effects of exotic species on invaded ecosystems and to prioritize management efforts, it is important that exotic species impacts are put in local environmental context. We studied how differences in plant community composition,...
Feeding ecology of non-native Siberian prawns, Palaemon modestus (Heller, 1862) (Decapoda, Palaemonidae), in the lower Snake River, Washington, U.S.A.
Kenneth F. Tiffan, William Hurst
2016, Crustaceana (89) 721-736
We used both stomach content and stable isotope analyses to describe the feeding ecology of Siberian prawns Palaemon modestus (Heller, 1862), a non-native caridean shrimp that is a relatively recent invader of the lower Snake River. Based on identifiable prey in stomachs, the opossum shrimp Neomysis mercedis Holmes, 1896 comprised...
Geomorphic evolution of the San Luis Basin and Rio Grande in southern Colorado and northern New Mexico
Chester A. Ruleman, Michael Machette, Ren A. Thompson, Dan M Miggins, Brent M Goehring, James B. Paces
2016, GSA Field Guides (44) 291-333
The San Luis Basin encompasses the largest structural and hydrologic basin of the Rio Grande rift. On this field trip, we will examine the timing of transition of the San Luis Basin from hydrologically closed, aggrading subbasins to a continuous fluvial system that eroded the basin, formed the Rio Grande...
Influence of land-atmosphere feedbacks on temperature and precipitation extremes in the GLACE-CMIP5 ensemble
Ruth Lorenz, Daniel Argueso, Markus G. Donat, Andrew J. Pitman, Bart van den Hurk, Alexis Berg, David M. Lawrence, Frederique Cheruy, Agnes Ducharne, Stefan Hagemann, Arndt Meier, Paul C.D. Milly, Sonia I Seneviratne
2016, Journal of Geophysical Research D: Atmospheres (121) 607-623
We examine how soil moisture variability and trends affect the simulation of temperature and precipitation extremes in six global climate models using the experimental protocol of the Global Land-Atmosphere Coupling Experiment of the Coupled Model Intercomparison Project, Phase 5 (GLACE-CMIP5). This protocol enables separate examinations of the influences of soil moisture...
Diet overlap and predation between largemouth bass and walleye in Wisconsin lakes using DNA barcoding to improve taxonomic resolution
Craig J. Kelling, Daniel A. Isermann, Brian L. Sloss, Keith N. Turnquist
2016, North American Journal of Fisheries Management (36) 621-629
Over the last decade, the abundance of Largemouth Bass Micropterus salmoides has increased in many northern Wisconsin lakes, causing concern among anglers and biologists regarding the potential for Largemouth Bass to negatively affect populations of Walleye Sander vitreus through predation or competition for prey. Our objectives were to determine whether...
LakeMetabolizer: An R package for estimating lake metabolism from free-water oxygen using diverse statistical models
Luke Winslow, Jacob A. Zwart, Ryan D. Batt, Hilary Dugan, R. Iestyn Woolway, Jessica Corman, Paul C. Hanson, Jordan S. Read
2016, Inland Waters (6) 622-636
Metabolism is a fundamental process in ecosystems that crosses multiple scales of organization from individual organisms to whole ecosystems. To improve sharing and reuse of published metabolism models, we developed LakeMetabolizer, an R package for estimating lake metabolism from in situ time series of dissolved oxygen, water temperature, and, optionally, additional environmental...
An evaluation of methods for estimating decadal stream loads
Casey J. Lee, Robert M. Hirsch, Gregory E. Schwarz, David J. Holtschlag, Stephen D. Preston, Charles G. Crawford, Aldo V. Vecchia
2016, Journal of Hydrology (542) 185-203
Effective management of water resources requires accurate information on the mass, or load of water-quality constituents transported from upstream watersheds to downstream receiving waters. Despite this need, no single method has been shown to consistently provide accurate load estimates among different water-quality constituents, sampling sites, and sampling regimes. We evaluate...
Evolution of viral virulence: empirical studies
Gael Kurath, Andrew R. Wargo
2016, Book chapter, Evolution of Viral virulence; Empirical Studies
The concept of virulence as a pathogen trait that can evolve in response to selection has led to a large body of virulence evolution theory developed in the 1980-1990s. Various aspects of this theory predict increased or decreased virulence in response to a complex array of selection pressures including mode...
Climatic and topographical factors affecting the vegetative carbon stock of rangelands in arid and semiarid regions of China
Ren Zhengchao, Zhu Huazhong, Hua Shi, Liu Xiaoni
2016, Journal of Resources and Ecology (7) 418-429
Rangeland systems play an important role in ecological stabilization and the terrestrial carbon cycle in arid and semiarid regions. However, little is known about the vegetative carbon dynamics and climatic and topographical factors that affect vegetative carbon stock in these rangelands. Our goal was to assess vegetative carbon stock by...
Establishing a baseline of estuarine submerged aquatic vegetation resources across salinity zones within coastal areas of the northern Gulf of Mexico
Eva R. Hillmann, Kristin DeMarco, Megan K. LaPeyre
2016, Journal of the Southeastern Association of Fish and Wildlife Agencies (3) 25-32
Coastal ecosystems are dynamic and productive areas that are vulnerable to effects of global climate change. Despite their potentially limited spatial extent, submerged aquatic vegetation (SAV) beds function in coastal ecosystems as foundation species, and perform important ecological services. However, limited understanding of the factors controlling SAV distribution and abundance...
Lethal thermal maxima for age-0 pallid and shovelnose sturgeon: Implications for shallow water habitat restoration
David Deslauriers, Laura B. Heironimus, Steven R. Chipps
2016, River Research and Applications (32) 1872-1878
We evaluated temperature tolerance in age-0 pallid and shovelnose sturgeon (Scaphirhynchus albus and Scaphirhynchus platorynchus), two species that occur sympatrically in the Missouri and Mississippi Rivers. Fish (0.04–18 g) were acclimated to water temperatures of 13, 18 or 24 °C to quantify temperatures associated with lethal thermal maxima (LTM). The results show...
Predicting invasiveness of species in trade: Climate match, trophic guild and fecundity influence establishment and impact of non-native freshwater fishes
Jennifer G. Howeth, Crysta A. Gantz, Paul L. Angermeier, Emmanuel A. Frimpong, Michael H. Hoff, Reuben P. Keller, Nicholas E. Mandrak, Michael P. Marchetti, Julian D. Olden, Christina M. Romagosa, David M. Lodge
2016, Diversity and Distributions (22) 148-160
AimImpacts of non-native species have motivated development of risk assessment tools for identifying introduced species likely to become invasive. Here, we develop trait-based models for the establishment and impact stages of freshwater fish invasion, and use them to screen non-native species common in international trade. We also determine which species...
Viral lysis of photosynthesizing microbes as a mechanism for calcium carbonate nucleation in seawater
John T. Lisle, Lisa L. Robbins
2016, Frontiers in Microbiology (7)
Removal of carbon through the precipitation and burial of calcium carbonate in marine sediments constitutes over 70% of the total carbon on Earth and is partitioned between coastal and pelagic zones. The precipitation of authigenic calcium carbonate in seawater, however, has been hotly debated because despite being in a supersaturated...
