Quantifying large-scale historical formation of accommodation in the Mississippi Delta
Robert A. Morton, Julie Bernier, Kyle W. Kelso, John A. Barras
2010, Earth Surface Processes and Landforms (35) 1625-1641
Large volumes of new accommodation have formed within the Mississippi Delta plain since the mid-1950s in association with rapid conversion of coastal wetlands to open water. The three-dimensional aspects and processes responsible for accommodation formation were quantified by comparing surface elevations, water depths, and vertical displacements of stratigraphic contacts that...
Reduced channel conveyance on the Wichita River at Wichita Falls, Texas, 1900-2009
Karl Winters, Stanley Baldys, Russell Schreiber
2010, Journal of Environmental Hydrology (18) Paper 8
Recent floods on the Wichita River at Wichita Falls, Texas, have reached higher stages compared to historical floods of similar magnitude discharges. The U.S. Geological Survey (USGS) has operated streamflow-gaging station 07312500 Wichita River at Wichita Falls, Tex., since 1938 and flood measurements near the location of the present gage...
Pseudasthenes, a new genus of ovenbird (Aves: Passeriformes: Furnariidae)
Elizabeth Derryberry, Santiago Claramunt, Kelly E. O’Quin, Alexandre Aleixo, R. Terry Chesser, J.V. Remsen Jr., Robb T. Brumfield
2010, Zootaxa (2416) 61-68
Phylogenetic analysis of the family Furnariidae (Aves: Passeriformes) indicates that the genus Asthenes is polyphyletic, consisting of two groups that are not sister taxa. Pseudasthenes, a new genus of ovenbird, is described for one of these groups. The four species included in the new genus, formerly placed in Asthenes, are...
Projected climate impacts for the amphibians of the western hemisphere
Joshua J. Lawler, Sarah L. Shafer, Betsy A. Bancroft, Andrew R. Blaustein
2010, Conservation Biology (24) 38-50
Given their physiological requirements, limited dispersal abilities, and hydrologically sensitive habitats, amphibians are likely to be highly sensitive to future climatic changes. We used three approaches to map areas in the western hemisphere where amphibians are particularly likely to be affected by climate change. First, we used bioclimatic models to...
Evaluation of geodetic and geologic datasets in the Northern Walker Lane-Summary and recommendations of the Workshop
Richard W. Briggs, William C. Hammond
2010, Open-File Report 2011-1282
The Northern Walker Lane comprises a complex network of active faults in northwestern Nevada and northeastern California bound on the west by the Sierra Nevada and on the east by the extensional Basin and Range Province. Because deformation is distributed across sets of discontinuous faults, it is particularly challenging to...
Predictors of occurrence of the aquatic macrophyte Podostemum ceratophyllum in a southern Appalachian River
Jane E. Argentina, Mary Freeman, Byron J. Freeman
2010, Southeastern Naturalist (9) 465-476
The aquatic macrophyte Podostemum ceratophyllum (Hornleaf Riverweed) commonly provides habitat for invertebrates and fishes in flowing-water portions of Piedmont and Appalachian streams in the eastern US. We quantified variation in percent cover by P. ceratophyllum in a 39-km reach of the Conasauga River, TN and GA, to test the hypothesis...
Prairie wetland complexes as landscape functional units in a changing climate
W. Carter Johnson, Brett Werner, Glenn R. Guntenspergen, Richard A. Voldseth, Bruce Millett, David E. Naugle, Mirela Tulbure, Rosemary W.H. Carroll, John Tracy, Craig Olawsky
2010, BioScience (60) 128-140
The wetland complex is the functional ecological unit of the prairie pothole region (PPR) of central North America. Diverse complexes of wetlands contribute high spatial and temporal environmental heterogeneity, productivity, and biodiversity to these glaciated prairie landscapes. Climatewarming simulations using the new model WETLANDSCAPE (WLS) project major reductions in water...
Simultaneous modeling of habitat suitability, occupancy, and relative abundance: African elephants in Zimbabwe
Julien Martin, Simon Chamaille-Jammes, James D. Nichols, Herve Fritz, James E. Hines, Christopher J. Fonnesbeck, Darryl I. MacKenzie, Larissa L. Bailey
2010, Ecological Applications (20) 1173-1182
The recent development of statistical models such as dynamic site occupancy models provides the opportunity to address fairly complex management and conservation problems with relatively simple models. However, surprisingly few empirical studies have simultaneously modeled habitat suitability and occupancy status of organisms over large landscapes for management purposes. Joint modeling...
Potential nitrogen fixation activity of different aged biological soil crusts from rehabilitated grasslands of the hilly Loess Plateau, China
Y. Zhao, M. Xu, J. Belnap
2010, Journal of Arid Environments (74) 1186-1191
Biological soil crusts (biocrusts) cover up to 60–70% of the soil surface in grasslands rehabilitated during the "Grain for Green" project implemented in the hilly Loess Plateau region in 1999. As biocrusts fix nitrogen (N), they are an important part of restoring soil fertility. We measured nitrogenase activity (NA) in...
Population viability of Arctic grayling in the Gibbon River, Yellowstone National Park
Amber C. Steed, Alexander V. Zale, Todd M. Koel, Steven T. Kalinowski
2010, North American Journal of Fisheries Management (30) 1582-1590
The fluvial Arctic grayling Thymallus arcticus is restricted to less than 5% of its native range in the contiguous United States and was relisted as a category 3 candidate species under the U.S. Endangered Species Act in 2010. Although fluvial Arctic grayling of the lower Gibbon River, Yellowstone National Park,...
Porosity and grain size controls on compaction band formation in Jurassic Navajo Sandstone
Richard A. Schultz, Chris H. Okubo, Haakon Fossen
2010, Geophysical Research Letters (37)
Determining the rock properties that permit or impede the growth of compaction bands in sedimentary sequences is a critical problem of importance to studies of strain localization and characterization of subsurface geologic reservoirs. We determine the porosity and average grain size of a sequence of stratigraphic layers of Navajo Sandstone...
Potential spread of highly pathogenic avian influenza H5N1 by wildfowl: dispersal ranges and rates determined from large-scale satellite telemetry
Nicolas Gaidet, Julien Cappelle, John Y. Takekawa, Diann J. Prosser, Samuel A. Iverson, David C. Douglas, William M. Perry, Taej Mundkur, Scott H. Newman
2010, Journal of Applied Ecology (47) 1147-1157
1. Migratory birds are major candidates for long-distance dispersal of zoonotic pathogens. In recent years, wildfowl have been suspected of contributing to the rapid geographic spread of the highly pathogenic avian influenza (HPAI) H5N1 virus. Experimental infection studies reveal that some wild ducks, geese and swans shed this virus asymptomatically...
Applying dispersive changes to Lagrangian particles in groundwater transport models
Leonard F. Konikow
2010, Transport in Porous Media (85) 437-449
Method-of-characteristics groundwater transport models require that changes in concentrations computed within an Eulerian framework to account for dispersion be transferred to moving particles used to simulate advective transport. A new algorithm was developed to accomplish this transfer between nodal values and advecting particles more precisely and realistically compared to currently...
Satellite tracking reveals habitat use by juvenile green sea turtles Chelonia mydas in the Everglades, Florida, USA
Kristen M. Hart, Ikuko Fujisaki
2010, Endangered Species Research (11)
We tracked the movements of 6 juvenile green sea turtles captured in coastal areas of southwest Florida within Everglades National Park (ENP) using satellite transmitters for periods of 27 to 62 d in 2007 and 2008 (mean ± SD: 47.7 ± 12.9 d). Turtles ranged in size from 33.4 to...
Zn and Cu isotopes as tracers of anthropogenic contamination in a sediment core from an urban lake
Anita Thapalia, David M. Borrok, Peter C. Van Metre, MaryLynn Musgrove, Edward R. Landa
2010, Environmental Science & Technology (44) 1544-1550
In this work, we use stable Zn and Cu isotopes to identify the sources and timing of the deposition of these metals in a sediment core from Lake Ballinger near Seattle, Washington, USA. The base of the Lake Ballinger core predates settlement in the region, while the upper sections record...
Introduction - The impacts of the 2008 eruption of Kasatochi Volcano on terrestrial and marine ecosystems in the Aleutian Islands, Alaska
Anthony R. DeGange, G. Vernon Byrd, Lawrence R. Walker, C. F. Waythomas
2010, Arctic, Antarctic, and Alpine Research (42) 245-249
The Aleutian Islands are situated on the northern edge of the so-called “Pacific Ring of Fire,” a 40,000-km-long horseshoe-shaped assemblage of continental landmasses and islands bordering the Pacific Ocean basin that contains many of the world's active and dormant volcanoes. Schaefer et al. (2009) listed 27 historically active volcanoes in...
Fine-scale population genetic structure in Alaskan Pacific halibut (Hippoglossus stenolepis)
Jennifer L. Nielsen, Sara L. Graziano, Andrew C. Seitz
2010, Conservation Genetics (11) 999-1012
Pacific halibut collected in the Aleutian Islands, Bering Sea and Gulf of Alaska were used to test the hypothesis of genetic panmixia for this species in Alaskan marine waters. Nine microsatellite loci and sequence data from the mitochondrial (mtDNA) control region were analyzed. Eighteen unique mtDNA haplotypes were found with...
Elodontoma in captive southern red-backed voles (Myodes gapperi)
Julia Rodriguez-Ramos Fernandez, Marie E. Pinkerton, Dennis M. Heisey, Randi Drees, Jay Schneider, Lacey Stickney, Erik K. Hofmeister, David Sanchez-Migallon Guzman
2010, Journal of Zoo and Wildlife Medicine (41) 555-561
Five southern red-backed voles (Myodes gapperi) of the first generation of a wild-caught breeding colony were presented with lesions at the maxillary incisors consistent with elodontoma. The affected animals had a history of chronic weight loss, were >16 months of age, and were siblings. Radiographs of the head showed multiglobular...
Population structure and relatedness among female Northern Pintails in three California wintering regions
Joseph P. Fleskes, Ada C. Fowler, Michael L. Casazza, John M. Eadie
2010, Waterbirds (33) 1-9
Female Northern Pintails (Anas acuta) were sampled in California's three main Central Valley wintering regions (Sacramento Valley, Suisun Marsh, San Joaquin Valley) during September–October before most regional movements occur and microsatellite and mitochondrial DNA were analyzed to examine population structure and relatedness. Despite reportedly high rates of early-fall pairing and...
Plant population and habitat characteristics of the endemic Sonoran Desert cactus Peniocereus striatus in Organ Pipe Cactus National Monument, Arizona
Greta Anderson, Sue Rutman, Seth M. Munson
2010, Madroño (57) 220-228
Peniocereus striatus (Brandegee) Buxb. (Cactaceae) is an endemic Sonoran Desert cactus that reaches its northern range limit in southwestern Arizona. One U.S. population occupies a small area of Organ Pipe Cactus National Monument near the U.S./Mexico international boundary, which has been monitored since 1939. An extensive survey conducted in 2002,...
Polyphyly of Campylorhamphus, and description of a new genus for C. pucherani (Dendrocolaptinae)
Santiago Claramunt, Elizabeth P. Derryberry, R. Terry Chesser, Alexandre Eleixo, Robb T. Brumfield
2010, The Auk (127) 430-439
We investigated the phylogenetic relationships of Campylorhamphus pucherani using DNA sequences from three mitochondrial genes and a nuclear intron, as well as 84 morphological characters from the skeleton, the integument, and the musculature. The molecular phylogeny indicated that C. pucherani is not part of Campylorhamphus; instead, it is the sister...
Physiological response of wild dugongs (Dugong dugon) to out-of-water sampling for health assessment
Janet M. Lanyon, Helen L. Sneath, Trevor Long, Robert K. Bonde
2010, Aquatic Mammals (36) 46-58
The dugong (Dugong dugon) is a vulnerable marine mammal with large populations living in urban Queensland waters. A mark-recapture program for wild dugongs has been ongoing in southern Queensland since 2001. This program has involved capture and in-water sampling of more than 700 dugongs where animals have been held at...
Phylogeography of declining relict and lowland leopard frogs in the desert Southwest of North America
V. Olah-Hemmings, J.R. Jaeger, M.J. Sredl, Martin A. Schlaepfer, R.D. Jennings, C.A. Drost, D.F. Bradford, B.R. Riddle
2010, Journal of Zoology (280) 343-354
We investigated the phylogeography of the closely related relict leopard frog Rana onca (=Lithobates onca) and lowland leopard frog Rana yavapaiensis (=Lithobates yavapaiensis) – two declining anurans from the warm‐desert regions of south‐western North America. We used sequence data from mitochondrial DNA (mtDNA) to assess 276 individuals representing 30 sites from across current distributions....
Pleistocene carbonate stratigraphy of South Florida: Evidence for high-frequency sea-level cyclicity
Todd D. Hickey, Albert C. Hine, Eugene A. Shinn, Sarah E. Kruse, Richard Z. Poore
2010, Journal of Coastal Research (26) 605-614
Pleistocene carbonates of south Florida and islands of the Florida Keys are currently divided into five marine sequences designated, from oldest to youngest, the Q1–Q5 units. The units include a mosaic of freshwater and shallow marine deposits that accumulated on the Florida platform during high sea-level stands. The...
Perspectives: Gene Expression in Fisheries Management
Jennifer L. Nielsen, Scott A. Pavey
2010, Current Zoology (56) 157-174
Functional genes and gene expression have been connected to physiological traits linked to effective production and broodstock selection in aquaculture, selective implications of commercial fish harvest, and adaptive changes reflected in non-commercial fish populations subject to human disturbance and climate change. Gene mapping using single nucleotide polymorphisms (SNPs) to identify...
