Extreme-event geoelectric hazard maps: Chapter 9
Jeffrey J. Love, Paul A. Bedrosian
2018, Book chapter, Extreme events in geospace
Maps of geoelectric amplitude covering about half the continental United States are presented that will be exceeded, on average, once per century in response to an extreme-intensity geomagnetic disturbance. These maps are constructed using an empirical parameterization of induction: convolving latitude-dependent statistical maps of extreme-value geomagnetic disturbances, obtained from decades...
Nutrient dynamics in partially drained arctic thaw lakes
Joshua C. Koch, Tom F. Fondell, Joel A. Schmutz, Sarah M. Laske
2018, Journal of Geophysical Research: Biogeosciences (123) 440-452
Thaw lakes are ubiquitous on arctic coastal plains (ACPs). While many thaw lakes have steep banks, stable water levels, and static surface areas, others only partially fill their basins and vary in area over the summer. These partially drained lakes (PDLs) are hydrologically connected to the wetlands immediately surrounding them....
Effects of sea lamprey substrate modification and carcass nutrients on macroinvertebrate assemblages in a small Atlantic coastal stream
Daniel M. Weaver, Stephen M. Coghlan Jr., Joseph D. Zydlewski
2018, Journal of Freshwater Ecology (33) 19-30
Aquatic macroinvertebrates respond to patch dynamics arising from interactions of physical and chemical disturbances across space and time. Anadromous fish, such as sea lamprey, Petromyzon marinus, migrate from the ocean and alter physical and chemical properties of recipient spawning streams. Sea lamprey disturb stream benthos physically through nest construction and spawning,...
Mapping forest change using stacked generalization: An ensemble approach
Sean P. Healey, Warren B. Cohen, Zhiqiang Yang, C. Kenneth Brewer, Evan B. Brooks, Noel Gorelick, Alexander J. Hernandez, Chengquan Huang, M. Joseph Hughes, Robert E. Kennedy, Thomas Loveland, Gretchen G. Moisen, Todd A. Schroeder, Stephen V. Stehman, James Vogelmann, Curtis E. Woodcock, Limin Yang, Zhe Zhu
2018, Remote Sensing of Environment (204) 717-728
The ever-increasing volume and accessibility of remote sensing data has spawned many alternative approaches for mapping important environmental features and processes. For example, there are several viable but highly varied strategies for using time series of Landsat imagery to detect changes in forest cover. Performance among algorithms varies across complex natural systems, and it...
Photographs of wading bird depredation events to monitor invasion extent of Asian Swamp Eel (Monopterus albus)
Andrew T. Taylor, James M. Long, H. von Scmeling
2018, Southeastern Naturalist (17) N72-N76
Several anecdotes exist of wading birds depredating invasive Monopterus albus (Asian Swamp Eel) in waterways of the conterminous US. We present photographic evidence of 4 different wading bird species depredating adult Asian Swamp Eels in Georgia and Florida herein. Photographs taken by wildlife enthusiasts could provide a means for early...
High resolution water body mapping for SWAT evaporative modelling in the Upper Oconee watershed of Georgia, USA
Amber R. Ignatius, John W. Jones
2018, Hydrological Processes (32) 51-65
Technological improvements in remote sensing and geographic information systems have demonstrated the abundance of artificially constructed water bodies across the landscape. Although research has shown the ubiquity of small ponds globally, and in the southeastern United States in particular, their cumulative impact in terms of evaporative alteration is less well...
Advancements in hydrochemistry mapping: methods and application to groundwater arsenic and iron concentrations in Varanasi, Uttar Pradesh, India
Ricardo A. Olea, N. Janardhana Raju, Juan J. Egozcue, Vera Pawlowsky-Glahn, Shubhra Singh
2018, Stochastic Environmental Research and Risk Assessment (32) 241-259
The area east of Varanasi is one of numerous places along the watershed of the Ganges River with groundwater concentrations of arsenic surpassing the maximum value of 10 parts per billion (ppb) recommended by the World Health Organization in drinking water. Here we apply geostatistics and compositional data analysis for...
Characterizing aquatic habitats for long‐term monitoring of a fourth‐order, regulated river in the Pacific Northwest, USA
Christopher P. Konrad, K. Burton, R. Little, Andrew S. Gendaszek, Mark D. Munn, Scott W. Anderson
2018, River Research and Applications (34) 24-33
A pragmatic approach to the long‐term monitoring of rivers leverages available information with targeted field investigations to address key uncertainties relevant to management decisions. An over‐arching management issue for many rivers is how reservoir operation affects the amount and location of in‐channel sediment and the resulting distribution of aquatic habitats....
Barataria and Terrebonne Bays: Chapter F in Emergent wetlands status and trends in the northern Gulf of Mexico: 1950-2010
Lawrence Handley, Kathryn A. Spear, Mirka Zapletal, Cindy A. Thatcher, William R. Jones, Scott A. Wilson
2018, Report, Emergent Wetlands Status and Trends in the Northern Gulf of Mexico: 1950-2010 report
The study area included in the Barataria and Terrebonne Bays vignette of southeastern Louisiana spans eastward from Terrebonne Bay to Barataria Bay (Figure 1) and includes portions of Terrebonne, Lafourche, St. Charles, Jefferson, Orleans, Plaquemines, and St. Bernard Parishes. This area falls between the Mississippi River on the east and northeast, extends down through...
Resilience in environmental risk and impact assessment: Concepts and measurement
David G. Angeler, Craig R. Allen, Ahjond S. Garmestani, Kevin L. Pope, Dirac Twidwell, Mirco Bundschuh
2018, Bulletin of Environmental Contamination and Toxicology (101) 543-548
Different resilience concepts have different assumptions about system dynamics, which has implications for resilience-based environmental risk and impact assessment. Engineering resilience (recovery) dominates in the risk assessment literature but this definition does not account for the possibility of ecosystems to exist in multiple regimes. In this paper we discuss resilience...
Dietary bioprocessed soybean meal does not affect the growth of exercised juvenile rainbow trout (Oncorhynchus mykiss)
Jill M. Voorhees, Michael Barnes, Steven R. Chipps, Michael Browne
2018, Journal of Animal Research and Nutrition (3) 1-13
Context: This 88-day experiment evaluated the rearing performance of juvenile rainbow trout (Oncorhynchus mykiss) fed one of three isonitrogenous and isocaloric diets and reared at velocities of either 2.3 or 18.7 cm s-1.Objective: Evaluate the effects of diet and exercise during rainbow trout rearing.Design: Fishmeal was the primary protein source...
Correlation of the Eagle Ford Group, Woodbine Group, and equivalent Cenomanian-Turonian Mudstones using regional wireline-log cross sections across the Texas Gulf Coast, U.S.A.
Nicholas J. Gianoutsos, Katherine J. Whidden, Russell F. Dubiel, William A. Rouse
2018, Gulf Coast Association of Geological Societies Transactions (68) 219-228
As part of the U.S. Geological Survey’s 2018 hydrocarbon assessment of the Eagle Ford Group and associated Cenomanian-Turonian strata, a series of regional wireline-log cross sections were constructed to examine geologic characteristics of this stratigraphic interval across the Texas Gulf Coast from Mexico to Louisiana. The cross sections were...
Preface: The wetland book, I: Structure and function, management, and methods
C. Max Finlayson, Mark Everard, Kenneth Irvine, Robert J. McInnes, Beth A. Middleton, Anne A. Van Dam, Nick C. Davidson
2018, Book chapter, The wetland book, I: Structure, function, management, and methods
The Wetland Book is a hard copy and online production that provides an unparalleled collation of information on wetlands. It is global in scope and contains 462 chapters prepared by leading wetland researchers and managers. The wide disciplinary and geographic scope is a unique feature and differentiates The Wetland Book...
Yellowstone grizzly bear investigations — Annual report of the Interagency Grizzly Bear Study Team 2017
Frank T. van Manen, Mark A. Haroldson, Bryn Karabensh, editor(s)
2018, Report
This Annual Report summarizes results of grizzly bear (Ursus arctos) monitoring and research conducted in the Greater Yellowstone Ecosystem (GYE) by the Interagency Grizzly Bear Study Team (IGBST) during 2017. This report also contains a summary of grizzly bear management actions to address conflict situations. Annual reports of the IGBST...
Quantifying uncertainty and tradeoffs in resilience assessments
Craig R. Allen, Hannah E. Birge, David G. Angeler, Craig Anthony Arnold, Brian C. Chaffin, Daniel A. DeCaro, Ahjond S. Garmestani, Lance Gunderson
2018, Ecology and Society (1)
Several frameworks have been developed to assess the resilience of social-ecological systems, but most require substantial data inputs, time, and technical expertise. Stakeholders and practitioners often lack the resources for such intensive efforts. Furthermore, most end with problem framing and fail to explicitly address trade-offs and uncertainty. To remedy this...
Data quality from a community-based, water-quality monitoring project in the Yukon River basin
Nicole M. Herman-Mercer, Ronald C. Antweiler, Nicole J. Wilson, Edda A. Mutter, Ryan C. Toohey, Paul F. Schuster
2018, Citizen Science: Theory and Practice (3) 1-13
This paper examines the quality of data collected by the Indigenous Observation Network, a community-based water-quality project in the Yukon River Basin of Alaska and Canada. The Indigenous Observation Network relies on community technicians to collect surface-water samples from as many as fifty locations to achieve their goals of monitoring...
Efficiently approximating the Pareto frontier: Hydropower dam placement in the Amazon basin
Xiaojian Wu, Jonathan Gomes-Selman, Qinru Shi, Yexiang Xue, Roosevelt Garcia-Villacorta, Eliza Anderson, Suresh Sethi, Scott Steinschneider, Alexander Flecker, Carla P. Gomes
2018, Conference Paper, Proc. Thirty-Second AAAI Conference on Artificial Intelligence
Real–world problems are often not fully characterized by a single optimal solution, as they frequently involve multiple competing objectives; it is therefore important to identify the so-called Pareto frontier, which captures solution trade-offs. We propose a fully polynomial-time approximation scheme based on Dynamic Programming (DP) for computing a polynomially succinct...
Walleye recruitment success is less resilient to warming water temperatures in lakes with abundant largemouth bass populations
Gretchen J. A. Hansen, Stephen R. Midway, Tyler Wagner
2018, Canadian Journal of Fisheries and Aquatic Sciences (75) 106-115
Lakes respond heterogeneously to climate, with implications for fisheries management. We analyzed walleye (Sander vitreus) recruitment to age-0 in 359 lakes in Wisconsin, USA, to (i) quantify the relationship between annual water temperature degree days (DD) and walleye recruitment success and (ii) identify the influence of lake characteristics — area,...
The electric storm of November 1882
Jeffrey J. Love
2018, Space Weather (16) 37-46
In November 1882, an intense magnetic storm related to a large sunspot group caused widespread interference to telegraph and telephone systems and provided spectacular and unusual auroral displays. The (ring current) storm time disturbance index for this storm reached maximum −Dst ≈ 386 nT, comparable to Halloween storm of 29–31 October 2003, but...
Ecotypic variation in population dynamics of reintroduced bighorn sheep
Vernon C. Bleich, Glen A. Sargeant, Brett P. Wiedmann
2018, Journal of Wildlife Management (82) 8-18
Selection of bighorn sheep (Ovis canadensis) for translocation historically has been motivated by preservation of subspecific purity rather than by adaptation of source stocks to similar environments. Our objective was to estimate cause‐specific, annual, and age‐specific mortality of introduced bighorn sheep that originated at low elevations in southern British Columbia,...
Insights into the emplacement of upper-crustal plutons and their relationship to large silicic calderas, from field relationships, geochronology, and zircon trace element geochemistry in the Stillwater – Clan Alpine caldera complex, western Nevada, USA
Joseph P. Colgan, David A. John, Christopher D. Henry, Kathryn E. Watts
2018, Journal of Volcanology and Geothermal Research (349) 163-176
Geologic mapping, new U-Pb zircon ages, and new and published 40Ar/39Ar sanidine ages document the timing and extent of Oligocene magmatism in the southern Stillwater Range and Clan Alpine Mountains of western Nevada, where Miocene extension has exposed at least six nested silicic calderas and underlying granitic plutons to crustal depths...
Quantifying postfire aeolian sediment transport using rare earth element tracers
David Dukes, Howell B. Gonzales, Sujith Ravi, David E. Grandstaff, R. Scott Van Pelt, Junran Li, Guan Wang, Joel B. Sankey
2018, Journal of Geophysical Research: Biogeosciences (123) 288-299
Grasslands, which provide fundamental ecosystem services in many arid and semiarid regions of the world, are undergoing rapid increases in fire activity and are highly susceptible to postfire-accelerated soil erosion by wind. A quantitative assessment of physical processes that integrates fire-wind erosion feedbacks is therefore needed relative to vegetation change,...
Variation in angler distribution and catch rates of stocked rainbow trout in a small reservoir
Brian S. Harmon, Dustin R. Martin, Christopher J. Chizinski, Kevin L. Pope
2018, PLoS ONE (13) 1-6
We investigated the spatial and temporal relationship of catch rates and angler party location for two days following a publicly announced put-and-take stocking of rainbow trout (Oncorhynchus mykiss). Catch rates declined with time since stocking and distance from stocking. We hypothesized that opportunity for high catch rates would cause anglers...
Diel predator activity drives a dynamic landscape of fear
Michel T. Kohl, Daniel R. Stahler, Matthew C. Metz, James D. Forester, Matthew J. Kauffman, Nathan Varley, P.J. White, Douglas W. Smith, Daniel R. MacNulty
2018, Ecological Monographs (88) 638-652
A “landscape of fear” (LOF) is a map that describes continuous spatial variation in an animal's perception of predation risk. The relief on this map reflects, for example, places that an animal avoids to minimize risk. Although the LOF concept is a potentially unifying theme in ecology that is often...
The role of driving factors in historical and projected carbon dynamics of upland ecosystems in Alaska
Hélène Genet, Yujie He, Zhou Lyu, A. David McGuire, Qianlai Zhuang, Joy S. Clein, David D'Amore, Alec Bennett, Amy Breen, Frances Biles, Eugénie S. Euskirchen, Kristofer Johnson, Tom Kurkowski, Svetlana Schroder, Neal J. Pastick, T. Scott Rupp, Bruce K. Wylie, Yujin Zhang, Xiaoping Zhou, Zhiliang Zhu
2018, Ecological Applications (28) 5-27
It is important to understand how upland ecosystems of Alaska, which are estimated to occupy 84% of the state (i.e., 1,237,774 km2), are influencing and will influence state‐wide carbon (C) dynamics in the face of ongoing climate change. We coupled fire disturbance and biogeochemical models to assess the relative effects of...
