Geology and geomorphology of the Carolina Sandhills, Chesterfield County, South Carolina
Christopher S. Swezey, Bradley A. Fitzwater, G. Richard Whittecar
2016, Book
This two-day field trip focuses on the geology and geomorphology of the Carolina Sandhills in Chesterfield County, South Carolina. This area is located in the updip portion of the U.S. Atlantic Coastal Plain province, supports an ecosystem of longleaf pine (Pinus palustris) and wiregrass (Aristida stricta), and contains three major...
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...
Origin and identity of Fejervarya (Anura: Dicroglossidae) on Guam
Elijah Wostl, Eric N. Smith, Robert Reed
2016, Pacific Science (70) 233-241
We used morphological and molecular data to infer the identity and origin of frogs in the genus Fejervarya that have been introduced to the island of Guam. Mensural and meristic data were collected from 96 specimens from throughout their range on the island and a principal component analysis was used...
A centroid model of species distribution with applications to the Carolina wren Thryothorus ludovicianus and house finch Haemorhous mexicanus in the United States
Qiongyu Huang, John R. Sauer, Anu Swatantran, Ralph Dubayah
2016, Ecography (39) 54-66
Drastic shifts in species distributions are a cause of concern for ecologists. Such shifts pose great threat to biodiversity especially under unprecedented anthropogenic and natural disturbances. Many studies have documented recent shifts in species distributions. However, most of these studies are limited to regional scales, and do not consider the...
A linear relationship between wave power and erosion determines salt-marsh resilience to violent storms and hurricanes
Nicoletta Leonardi, Neil K. Ganju, Sergio Fagherazzi
2016, Proceedings of the National Academy of Sciences of the United States of America (113) 64-68
Salt marsh losses have been documented worldwide because of land use change, wave erosion, and sea-level rise. It is still unclear how resistant salt marshes are to extreme storms and whether they can survive multiple events without collapsing. Based on a large dataset of salt marsh lateral erosion rates collected...
Exploration and geology of the Karangahake and Rahu epithermal Au-Ag deposits, Hauraki Goldfield
Mark P. Simpson, Murray R Stevens, Jeffrey L. Mauk, Matthew C Harris, Alistair G J Stuart
2016, Book chapter, AusIMM Monograph 31: Mineral deposits of New Zealand—Exploration and research
Karangahake was the third largest gold producer in the Hauraki goldfield. In 2009, New Talisman Gold mines was granted a mining permit, and plans are underway to commence underground mine development of the Maria vein, which has a maiden Ore Reserve (consistent with the 2012 JORC Code) of 28 800...
Ore mineralogy and textural zonation in the world-class epithermal Waihi Vein System, Hauraki Goldfield
Jeffrey L. Mauk, Erin G Skinner, Sarah J Fyfe, Andrew H Menzies, Heather A. Lowers, Alan E. Koenig
2016, Book chapter, AusIMM Monograph 31: Mineral deposits of New Zealand—Exploration and research
The Waihi district in the Hauraki Goldfield of New Zealand contains adularia-sericite epithermal gold-silver veins that have produced more than 7.7 Moz gold. The outermost veins of the district (Martha, Favona, Moonlight, and Cowshed) contain abundant colloform, cherty, and black quartz fill textures, with minor crustiform and massive quartz. The...
Seasonal electrical resistivity surveys of a coastal bluff, Barter Island, North Slope Alaska
Peter W. Swarzenski, Cordell Johnson, Thomas Lorenson, Christopher H. Conaway, Ann E. Gibbs, Li H. Erikson, Bruce M. Richmond, Mark P. Waldrop
2016, Journal of Environmental & Engineering Geophysics (21) 37-42
Select coastal regions of the North Slope of Alaska are experiencing high erosion rates that can be attributed in part to recent warming trends and associated increased storm intensity and frequency. The upper sediment column of the coastal North Slope of Alaska can be described as continuous permafrost underlying a...
Seismic velocities within the sedimentary succession of the Canada Basin and southern Alpha-Mendeleev Ridge, Arctic Ocean: evidence for accelerated porosity reduction?
John Shimeld, Qingmou Li, Deping Chian, Nina Lebedeva-Ivanova, Ruth Jackson, David Mosher, Deborah R. Hutchinson
2016, Geophysical Journal International (204) 1-20
The Canada Basin and the southern Alpha-Mendeleev ridge complex underlie a significant proportion of the Arctic Ocean, but the geology of this undrilled and mostly ice-covered frontier is poorly known. New information is encoded in seismic wide-angle reflections and refractions recorded with expendable sonobuoys between 2007 and 2011. Velocity–depth samples...
The international scale of the groundwater issue
Michael Fienen, Muhammad Arshad
2016, Book chapter, Integrated groundwater management
Throughout history, and throughout the world, groundwater has been a major source of water for sustaining human life. Use of this resource has increased dramatically over the last century. In many areas of the world, the balance between human and ecosystem needs is difficult to maintain. Understanding the international scale...
Comparative mitogenomic analyses of three North American stygobiont amphipods of the genus Stygobromus (Crustacea: Amphipoda)
Aaron W. Aunins, David L. Nelms, Christopher S. Hobson, Tim L. King
2016, Mitochondrial DNA Part B (1) 560-563
The mitochondrial genomes of three North American stygobiont amphipods Stygobromus tenuis potomacus, S. foliatus and S. indentatus collected from Caroline County, VA, were sequenced using a shotgun sequencing approach on an Illumina NextSeq500 (Illumina Inc., San Diego, CA). All three mitogenomes displayed 13 protein-coding genes, 22 tRNAs and two rRNAs typical of metazoans. While S. tenuis and S....
Modeling abundance using multinomial N-mixture models
J. Andrew Royle
2016, Book chapter
Multinomial N-mixture models are a generalization of the binomial N-mixture models described in Chapter 6 to allow for more complex and informative sampling protocols beyond simple counts. Many commonly used protocols such as multiple observer sampling, removal sampling, and capture-recapture produce a multivariate count frequency that has a multinomial distribution...
Rating curve uncertainty: A comparison of estimation methods
Mason Jr., Julie E. Kiang, Timothy A. Cohn
George Constantinescu, Marcelo H. Garcia, Dan Hanes, editor(s)
2016, Conference Paper, Proceedings of the international conference on fluvial hydraulics (river flow 2016)
The USGS is engaged in both internal development and collaborative efforts to evaluate existing methods for characterizing the uncertainty of streamflow measurements (gaugings), stage-discharge relations (ratings), and, ultimately, the streamflow records derived from them. This paper provides a brief overview of two candidate methods that may be used to characterize...
Rapid environmental change drives increased land use by an Arctic marine predator
Todd C. Atwood, Elizabeth L. Peacock, Melissa A. McKinney, Kate Lillie, Ryan H. Wilson, David C. Douglas, Pat Terletzky, Susanne Miller
2016, PLoS ONE (6)
In the Arctic Ocean’s southern Beaufort Sea (SB), the length of the sea ice melt season (i.e., period between the onset of sea ice break-up in summer and freeze-up in fall) has increased substantially since the late 1990s. Historically, polar bears (Ursus maritimus) of the SB have mostly remained on...
The story of rising voices: Facilitating collaboration between indigenous and western ways of knowing
Julie Maldonado, Heather Lazrus, Shiloh-Kay Bennett, Karletta Chief, Carla May Dhillon, Bob Gough, Linda Kruger, Jeffrey T. Morisette, Stefan Petrovic, Kyle P. Whyte
Michele Companion, Miriam S. Chaiken, editor(s)
2016, Book chapter, Responses to disasters and climate change: Understanding vulnerability and fostering resilience
Indigenous community self-determination, cultures, and ways of life are at high risk from climate change impacts and ecological dispossession. Partnerships between experts with backgrounds in Indigenous and western knowledge may be productive and effective ways to reduce vulnerability and foster resilience. This chapter examines collaborations among scientific and Native American,...
Science framework for the conservation and restoration strategy of DOI secretarial order 3336: Utilizing resilience and resistance concepts to assess threats to sagebrush ecosystems and greater sage-grouse, prioritize conservation and restoration actions, and inform management strategies
Jeanne C. Chambers, Steve Campbell, John Carlson, Jeffrey L. Beck, Karen J. Clause, Jonathan B. Dinkins, Kevin E. Doherty, Shawn Espinosa, Kathleen A. Griffin, Thomas J. Christiansen, Michele R. Crist, Steve E. Hanser, Douglas W. Havlina, Kenneth F. Henke, Jacob D. Hennig, Laurie L. Kurth, Jeremy D. Maestas, Kenneth E. Mayer, Mary E. Manning, Brian A. Mealor, Clinton McCarthy, Mike Pellant, Karen L. Prentice, Marco A. Perea, Lief A. Wiechman, David A. Pyke, Amarina Wuenschel
2016, Report
The Science Framework for the Conservation and Restoration Strategy of the Department of the Interior, Secretarial Order 3336 (SO 3336), Rangeland Fire Prevention, Management and Restoration, provides a strategic, multiscale approach for prioritizing areas for management and determining effective management strategies across the sagebrush biome. The emphasis of this version...
Early Mesozoic geology in Virginia
Joseph P. Smoot
Christopher M. Bailey, W. Cullen Sherwood, L. Scott Eaton, David S. Powars, editor(s)
2016, Book chapter, The geology of Virginia (Virginia Museum of Natural History Special Publication 18)
No abstract available....
Consistent and efficient processing of ADCP streamflow measurements
David S. Mueller
George Constantinescu, Marcelo H. Garcia, Dan Hanes, editor(s)
2016, Conference Paper, River Flow 2016: Proceedings of the international conference on fluvial hydraulics
The use of Acoustic Doppler Current Profilers (ADCPs) from a moving boat is a commonly used method for measuring streamflow. Currently, the algorithms used to compute the average depth, compute edge discharge, identify invalid data, and estimate velocity and discharge for invalid data vary among manufacturers. These differences could result...
Integrated groundwater data management
Peter Fitch, Boyan Brodaric, Matt Stenson, Nathaniel Booth
Anthony J. Jakeman, Olivier Barreteau, Randall J. Hunt, Jean-Daniel Rinaudo, Andrew Ross, editor(s)
2016, Book chapter, Integrated groundwater management
The goal of a data manager is to ensure that data is safely stored, adequately described, discoverable and easily accessible. However, to keep pace with the evolution of groundwater studies in the last decade, the associated data and data management requirements have changed significantly. In particular, there is a growing...
Status and trends in the Lake Superior fish community, 2015
Mark R. Vinson, Lori M. Evrard, Owen T. Gorman, Daniel L. Yule
2016, Report, Compiled reports to the Great Lakes Fishery Commission of the annual bottom trawl and acoustics surveys, 2015
In 2015, the Lake Superior fish community was sampled with daytime bottom trawls at 76 nearshore and 33 offshore stations. Spring and summer water temperatures in 2015 were colder than average, but warmer than that observed in 2014. In the nearshore zone, a total of 11,882 individuals from 22 species...
Advanced hierarchical distance sampling
J. Andrew Royle
2016, Book chapter
In this chapter, we cover a number of important extensions of the basic hierarchical distance-sampling (HDS) framework from Chapter 8. First, we discuss the inclusion of “individual covariates,” such as group size, in the HDS model. This is important in many surveys where animals form natural groups that are the...
Hydrologic effects on diameter growth phenology for Celtis laevigata and Quercus lyrata in the floodplain of the lower White River, Arkansas
Scott T. Allen, Wesley Cochran, Ken W. Krauss, Richard F. Keim, Sammy L. King
Callie Jo Schweitzer, Wayne K. Clatterbuck, Christopher M. Oswalt, editor(s)
2016, Conference Paper, Proceedings of the 18th Biennial Southern Silvicultural Research Conference: USDA Forest Service General Technical Report SRS-212
Bottomland hardwood (BLH) forests represent an extensive wetland system in the Mississippi Alluvial Valley and southeastern USA, and it is currently undergoing widespread transition in species composition. One such transition involves increased establishment of sugarberry (Celtis laevigata), and decreased establishment of overcup oak (Quercus lyrata). The ecological mechanisms that control...
Estimating abundance
Chris Sutherland, J. Andrew Royle
2016, Book chapter, Reptile ecology and conservation: A handbook of techniques
This chapter provides a non-technical overview of ‘closed population capture–recapture’ models, a class of well-established models that are widely applied in ecology, such as removal sampling, covariate models, and distance sampling. These methods are regularly adopted for studies of reptiles, in order to estimate abundance from counts of marked individuals...
Forest structure of oak plantations after silvicultural treatment to enhance habitat for wildlife
Daniel J. Twedt, Cherrie-Lee P. Phillip, Michael P. Guilfoyle, R. Randy Wilson
Callie Jo Schweitzer, Wayne K. Clatterbuck, Christopher M. Oswalt, editor(s)
2016, Conference Paper, Proceedings of the 18th Biennial Southern Silvicultural Research Conference
During the past 30 years, thousands of hectares of oak-dominated bottomland hardwood plantations have been planted on agricultural fields in the Mississippi Alluvial Valley. Many of these plantations now have closed canopies and sparse understories. Silvicultural treatments could create a more heterogeneous forest structure, with canopy gaps and...
Targets set to reduce Lake Erie algae
Mary Anne Evans
2016, Report, Michigan State of the Great Lakes
In February 2016, the Great Lakes Executive Committee, which oversees the implementation of the Great Lakes Water Quality Agreement (GLWQA) between the U.S. and Canada, approved phosphorus loading targets for Lake Erie to reduce the size of harmful algal blooms (HABs), reduce the presence of the low oxygen zone in...
