Assessing effects of native forest restoration on soil moisture dynamics and potential aquifer recharge, Auwahi, Maui
Kim S. Perkins, John R. Nimmo, Arthur C. Medeiros, Daphne J. Szutu, Erica von Allmen
2014, Ecohydrology (7) 1437-1451
Understanding the role of soils in regulating water flow through the unsaturated zone is critical in assessing the influence of vegetation on soil moisture dynamics and aquifer recharge. Because of fire, introduced ungulates and landscape-level invasion of non-native grasses, less than 10% of original dry forest (~730 mm precipitation annually) still...
Change detection using vegetation indices and multiplatform satellite imagery at multiple temporal and spatial scales
Edward P. Glenn, Pamela L. Nagler, Alfredo R. Huete
Qihao Weng, editor(s)
2014, Book chapter, Scale Issues in Remote Sensing
This chapter describes emerging methods for using satellite imagery across temporal and spatial scales using a case study approach to illustrate some of the opportunities now available for combining observations across scales. It explores the use of multiplatform sensor systems to characterize ecological change, as exemplified by efforts to scale...
Evaluation of analytical techniques to determine AQUI-S® 20E (eugenol) concentrations in water
Jeffery R. Meinertz, Karina R. Hess
2014, Aquaculture (418-419) 62-66
There is a critical need in U.S. public aquaculture and fishery management programs for an immediate-release sedative, i.e. a compound that can be safely and effectively used to sedate fish and subsequently, allow for their immediate release. AQUI-S® 20E (10% active ingredient, eugenol; any use of trade, firm, or product...
On the role of budget sufficiency, cost efficiency, and uncertainty in species management
Max Post van der Burg, Bartholomew B. Bly, Tammy Vercauteren, J. Barry Grand, Andrew J. Tyre
2014, Journal of Wildlife Management (78) 153-163
Many conservation planning frameworks rely on the assumption that one should prioritize locations for management actions based on the highest predicted conservation value (i.e., abundance, occupancy). This strategy may underperform relative to the expected outcome if one is working with a limited budget or the predicted responses are uncertain. Yet,...
Nitrate fate and transport through current and former depressional wetlands in an agricultural landscape, Choptank Watershed, Maryland, United States
J. M. Denver, S.W. Ator, M.W. Lang, T.R. Fisher, A.B. Gustafson, R. Fox, J.W. Clune, G.W. McCarty
2014, Journal of Soil and Water Conservation (69) 1-16
Understanding local groundwater hydrology and geochemistry is critical for evaluating the effectiveness of wetlands at mitigating agricultural impacts on surface waters. The effectiveness of depressional wetlands at mitigating nitrate (NO3) transport from fertilized row crops, through groundwater, to local streams was examined in the watershed of the upper Choptank River,...
Guidelines for monitoring and adaptively managing restoration of Chinook salmon (Oncorhynchus tshawytscha) and steelhead (O. mykiss) on the Elwha River
R.J. Peters, J.J. Duda, G.R. Pess, M. Zimmerman, P. Crain, Z. Hughes, A. Wilson, M.C. Liermann, S.A. Morley, J. McMillan, K. Denton, K. Warheit
2014, Conference Paper, Proceedings of the Joint Federal Interagency Conference
As of January, 2014, the removal of the Elwha and Glines Canyon dams on the Elwha River, Washington, represents the largest dam decommissioning to date in the United States. Dam removal is the single largest step in meeting the goals of the Elwha River Ecosystem and Fisheries Restoration Act of...
Transport of fine sediment over a coarse, immobile riverbed
Paul E. Grams, Peter R. Wilcock
2014, Journal of Geophysical Research F: Earth Surface (119) 188-211
Sediment transport in cobble-boulder rivers consists mostly of fine sediment moving over a coarse, immobile bed. Transport rate depends on several interrelated factors: boundary shear stress, the grain size and volume of fine sediment, and the configuration of fine sediment into interstitial deposits and bed forms. Existing models do not...
40Ar/39Ar Geochronology, Isotope Geochemistry (Sr, Nd, Pb), and petrology of alkaline lavas near Yampa, Colorado: migration of alkaline volcanism and evolution of the northern Rio Grande rift
Michael A. Cosca, Ren A. Thompson, John P. Lee, Kenzie J. Turner, Leonid A. Neymark, Wayne R. Premo
2014, Geology
Volcanic rocks near Yampa, Colorado (USA), represent one of several small late Miocene to Quaternary alkaline volcanic fields along the northeast margin of the Colorado Plateau. Basanite, trachybasalt, and basalt collected from six sites within the Yampa volcanic field were investigated to assess correlations with late Cenozoic extension and Rio...
Earthquake intensity distributions: a new view
Susan E. Hough
2014, Bulletin of Earthquake Engineering (12) 135-155
Pioneering work by Nicolas Ambraseys and many collaborators demonstrates both the tremendous value of macroseismic data and the perils of its uncritical assessment. In numerous publications he shows that neglect of original sources and/or failure to appreciate the context of historical accounts, as well as use of unreliable indicators such as landslid- ing to...
Simulation of groundwater flow in the Edwards-Trinity and related aquifers in the Pecos County region, Texas
Brian R. Clark, Johnathan R. Bumgarner, Natalie A. Houston, Adam L. Foster
2014, Scientific Investigations Report 2013-5228
The Edwards-Trinity aquifer is a vital groundwater resource for agricultural, industrial, and public supply uses in the Pecos County region of western Texas. The U.S. Geological Survey completed a comprehensive, integrated analysis of available hydrogeologic data to develop a numerical groundwater-flow model of the Edwards-Trinity and related aquifers in the...
Temporal and spatial distributions of cold-water corals in the Drake Passage: insights from the last 35,000 years
Andrew R. Margolin, Laura F. Robinson, Andrea Burke, Rhian G. Waller, Kathryn M. Scanlon, Mark L. Roberts, Maureen E. Auro, Tina van de Flierdt
2014, Deep-Sea Research Part II: Topical Studies in Oceanography (99) 237-248
Scleractinian corals have a global distribution ranging from shallow tropical seas to the depths of the Southern Ocean. Although this distribution is indicative of the corals having a tolerance to a wide spectrum of environmental conditions, individual species seem to be restricted to a much narrower range of ecosystem variables....
Mineral resource of the month: Iron and steel
Michael D. Fenton
2014, Earth
Iron is one of the most abundant elements on Earth, but it does not occur in nature in a useful metallic form. Although ancient people may have recovered some iron from meteorites, it wasn’t until smelting was invented that iron metal could be derived from iron oxides. After the beginning...
Nocturnal field use by fall migrating American woodcock in the Delta of Arkansas
David G. Krementz, Richard Crossett II, Sarah E. Lehnen
2014, Journal of Wildlife Management (78) 264-272
The American woodcock (Scolopax minor) population has declined since the late 1960s across its range and is now considered a species of special concern. Research on woodcock habitat use during migration and migratory routes through the Central Flyway has been limited. We assessed woodcock phenology, estimated density, and nocturnal habitat...
Reconstruction of historic sea ice conditions in a sub-Arctic lagoon
Chris Petrich, Adrienne C. Tivy, David H. Ward
2014, Cold Regions Science and Technology (98) 55-62
Historical sea ice conditions were reconstructed for Izembek Lagoon, Bering Sea, Alaska. This lagoon is a crucial staging area during migration for numerous species of avian migrants and a major eelgrass (Zostera marina) area important to a variety of marine and terrestrial organisms, especially Pacific Flyway black brant geese (Branta...
Decadal oscillation of lakes and aquifers in the upper Great Lakes region of North America: hydroclimatic implications
C.J. Watras, J.S. Read, K.D. Holman, Z. Liu, Y.-Y. Song, A.J. Watras, S. Morgan, E.H. Stanley
2014, Geophysical Research Letters (41) 456-462
We report a unique hydrologic time-series which indicates that water levels in lakes and aquifers across the upper Great Lakes region of North America have been dominated by a climatically-driven, near-decadal oscillation for at least 70 years. The historical oscillation (~13y) is remarkably consistent among small seepage lakes, groundwater tables and...
Isolation and molecular characterization of a novel picornavirus from baitfish in the USA
Nicholas B.D. Phelps, Sunil K. Mor, Anibal G. Armien, William N. Batts, Andrew E. Goodwin, Lacey Hopper, Rebekah McCann, Terry Fei Fan Ng, Corey Puzach, Thomas B. Waltzek, Eric Delwart, James Winton, Sagar M. Goyal
2014, PLoS ONE (9)
During both regulatory and routine surveillance sampling of baitfish from the states of Illinois, Minnesota, Montana, and Wisconsin, USA, isolates (n = 20) of a previously unknown picornavirus were obtained from kidney/spleen or entire viscera of fathead minnows (Pimephales promelas) and brassy minnows (Hybognathus hankinsoni). Following the appearance of a diffuse cytopathic...
Status of forest birds on Rota, Mariana Islands
Richard J. Camp, Kevin W. Brinck, P. Marcos Gorresen, Fred A. Amidon, Paul M. Radley, S. Paul Berkowitz, Paul C. Banko
2014, Report, Hawaii Cooperative Studies Unit Technical Report
The western Pacific island of Rota is the third largest human inhabited island in the Mariana archipelago, and is designated an Endemic Bird Area. Between 1982 and 2012, 12 point-transect distance sampling surveys were conducted to assess population status. Surveys did not consistently sample the entire island; thus, we used...
Modelling riverine habitat for robust redhorse: assessment for reintroduction of an imperilled species
J. M. Fisk III, Thomas J. Kwak, R. J. Heise
2014, Fisheries Management and Ecology (21) 57-67
A critical component of a species reintroduction is assessment of contemporary habitat suitability. The robust redhorse, Moxostoma robustum (Cope), is an imperilled catostomid that occupies a restricted range in the south-eastern USA. A remnant population persists downstream of Blewett Falls Dam, the terminal dam in the Pee Dee River, North...
Breaking the oceanic lithosphere of a subducting slab: the 2013 Khash, Iran earthquake
William D. Barnhart, Gavin P. Hayes, S. Samsonov, E. Fielding, L. Seidman
2014, Geophysical Research Letters (41) 32-36
[1] Large intermediate depth, intraslab normal faulting earthquakes are a common, dangerous, but poorly understood phenomenon in subduction zones owing to a paucity of near field geophysical observations. Seismological and high quality geodetic observations of the 2013 Mw7.7 Khash, Iran earthquake reveal that at least half of the oceanic lithosphere,...
Litter quality versus soil microbial community controls over decomposition: a quantitative analysis
Cory C. Cleveland, Sasha C. Reed, Adrienne B. Keller, Diana R. Nemergut, Sean P. O’Neill, Rebecca Ostertag, Peter M. Vitousek
2014, Oecologia (174) 283-294
The possible effects of soil microbial community structure on organic matter decomposition rates have been widely acknowledged, but are poorly understood. Understanding these relationships is complicated by the fact that microbial community structure and function are likely to both affect and be affected by organic matter quality and chemistry, thus...
Distal border fragments of the equine navicular bone: association between magnetic resonance imaging characteristics and clinical lameness
Elizabeth H. Yorke, Carter E. Judy, Travis C. Saveraid, Conor P. McGowan, Fred J. Caldwell
2014, Veterinary Radiology & Ultrasound (55) 35-44
Distal border fragments of the navicular bone are increasingly being detected due to the improved capabilities of magnetic resonance imaging (MRI), but their clinical significance remains unclear. The purpose of this retrospective study was to describe the location, size, and frequency of fragments in a cohort of horses presented for...
Blocking and guiding adult sea lamprey with pulsed direct current from vertical electrodes
Nicholas S. Johnson, Henry T. Thompson, Christopher M. Holbrook, John A. Tix
2014, Fisheries Research (150) 38-48
Controlling the invasion front of aquatic nuisance species is of high importance to resource managers. We tested the hypothesis that adult sea lamprey (Petromyzon marinus), a destructive invasive species in the Laurentian Great Lakes, would exhibit behavioral avoidance to dual-frequency pulsed direct current generated by vertical electrodes and that the...
Forecasting landscape effects of Mississippi River diversions on elevation and accretion in Louisiana deltaic wetlands under future environmental uncertainty scenarios
Hongqing Wang, Gregory D. Steyer, Brady R. Couvillion, John M. Rybczyk, Holly J. Beck, William J. Sleavin, Ehab A. Meselhe, Mead A. Allison, Ronald G. Boustany, Craig J. Fischenich, Victor H. Rivera-Monroy
2014, Estuarine, Coastal and Shelf Science (138) 57-68
Large sediment diversions are proposed and expected to build new wetlands to alleviate the extensive wetland loss (5,000 km2) affecting coastal Louisiana during the last 78 years. Current assessment and prediction of the impacts of sediment diversions have focused on the capture and dispersal of both water and sediment on...
Marsh soils as potential sinks for Bacteroides fecal indicator bacteria, Waccamaw National Wildlife Refuge, Georgetown, SC, USA
Judith Z. Drexler, Heather E. Johnson, Joseph W. Duris, Ken W. Krauss
2014, Water, Air, & Soil Pollution (225) 1-7
A soil core collected in a tidal freshwater marsh in the Waccamaw National Wildlife Refuge (Georgetown, SC) exuded a particularly strong odor of cow manure upon extrusion. In order to test for manure and determine its provenance, we carried out microbial source tracking using DNA markers for Bacteroides, a noncoliform,...
A radiogenic isotope tracer study of transatlantic dust transport from Africa to the Caribbean
A. Kumar, W. Abouchami, S.J.G. Galer, V.H. Garrison, E. Williams, M.O. Andreae
2014, Atmospheric Environment (82) 130-143
Many studies have suggested that long-range transport of African desert dusts across the Atlantic Ocean occurs, delivering key nutrients and contributing to fertilization of the Amazon rainforest. Here we utilize radiogenic isotope tracers – Sr, Nd and Pb – to derive the provenance, local or remote, and pathways of dust...
