Fish population dynamics in a seasonally varying wetland
Donald L. DeAngelis, Joel C. Trexler, Chris Cosner, Adam Obaza, Fred Jopp
2010, Ecological Modelling (221) 1131-1137
Small fishes in seasonally flooded environments such as the Everglades are capable of spreading into newly flooded areas and building up substantial biomass. Passive drift cannot account for the rapidity of observed population expansions. To test the reaction-diffusion mechanism for spread of the fish, we estimated their diffusion coefficient and...
Factors controlling the regional distribution of vanadium in ground water
Michael T. Wright, Kenneth Belitz
2010, Ground Water (48) 515-525
Although the ingestion of vanadium (V) in drinking water may have possible adverse health effects, there have been relatively few studies of V in groundwater. Given the importance of groundwater as a source of drinking water in many areas of the world, this study examines the potential sources and geochemical...
Feeding preferences of West Indian manatees in Florida, Belize, and Puerto Rico as indicated by stable isotope analysis
Christy D. Alves-Stanley, Graham A.J. Worthy, Robert K. Bonde
2010, Marine Ecology Progress Series (402) 255-267
The endangered West Indian manatee Trichechus manatus has 2 recognized subspecies: the Florida T. m. latirostris and Antillean T. m. manatus manatee, both of which are found in freshwater, estuarine, and marine habitats. A better understanding of manatee feeding preferences and habitat use is essential to establish criteria on which conservation plans can be based. Skin...
Field detection of avian influenza virus in wild birds: evaluation of a portable rRT-PCR system and freeze-dried reagents
John Y. Takekawa, Samuel A. Iverson, Annie K. Schultz, Nichola J. Hill, Carol J. Cardona, Walter M. Boyce, Joseph P. Dudley
2010, Journal of Virological Methods (166) 92-97
Wild birds have been implicated in the spread of highly pathogenic avian influenza (HPAIV) of the H5N1 subtype, prompting surveillance along migratory flyways. Sampling of wild birds is often conducted in remote regions, but results are often delayed because of limited local analytical capabilities, difficulties with sample transportation and permitting,...
Identifying sources of dissolved organic carbon in agriculturally dominated rivers using radiocarbon age dating: Sacramento-San Joaquin River Basin, California
James O. Sickman, Carol L. DiGiorgio, M. Lee Davisson, Delores M. Lucero, Brian A. Bergamaschi
2010, Biogeochemistry (99) 79-96
We used radiocarbon measurements of dissolved organic carbon (DOC) to resolve sources of riverine carbon within agriculturally dominated landscapes in California. During 2003 and 2004, average Δ14C for DOC was −254‰ in agricultural drains in the Sacramento–San Joaquin Delta, −218‰ in the San Joaquin River, −175‰ in the California State...
Hydrogeologic framework of fractured sedimentary rock, Newark Basin, New Jersey
Pierre J. Lacombe, William C. Burton
2010, Ground Water Monitoring and Remediation (30) 35-45
The hydrogeologic framework of fractured sedimentary bedrock at the former Naval Air Warfare Center (NAWC), Trenton, New Jersey, a trichloroethylene (TCE)-contaminated site in the Newark Basin, is developed using an understanding of the geologic history of the strata, gamma-ray logs, and rock cores. NAWC is the newest field research site...
Hydrological connectivity for riverine fish: measurement challenges and research opportunities
A.H. Fullerton, K.M. Burnett, E.A. Steel, R.L. Flitcroft, G.R. Pess, B.E. Feist, Christian E. Torgersen, D. J. Miller, B.L. Sanderson
2010, Freshwater Biology (55) 2215-2237
In this review, we first summarize how hydrologic connectivity has been studied for riverine fish capable of moving long distances, and then identify research opportunities that have clear conservation significance. Migratory species, such as anadromous salmonids, are good model organisms for understanding ecological connectivity in rivers because the spatial scale...
Hydrothermal zebra dolomite in the Great Basin, Nevada--attributes and relation to Paleozoic stratigraphy, tectonics, and ore deposits
S. F. Diehl, A. H. Hofstra, A.E. Koenig, P. Emsbo, W. Christiansen, Chad Johnson
2010, Geosphere (6) 663-690
In other parts of the world, previous workers have shown that sparry dolomite in carbonate rocks may be produced by the generation and movement of hot basinal brines in response to arid paleoclimates and tectonism, and that some of these brines served as the transport medium for metals fixed in...
Hydrogeology of the potsdam sandstone in northern New York
John Williams, Richard J. Reynolds, David A. Franzi, Edwin A. Romanowicz, Frederick L. Paillet
2010, Canadian Water Resources Journal (35) 399-416
The Potsdam Sandstone of Cambrian age forms a transboundary aquifer that extends across northern New York and into southern Quebec. The Potsdam Sandstone is a gently dipping sequence of arkose, subarkose, and orthoquartzite that unconformably overlies Precambrian metamorphic bedrock. The Potsdam irregularly grades upward over a thickness of 450 m...
Host‐seeking activity and avian host preferences of mosquitoes associated with West Nile virus transmission in the northeastern U.S.A.
Channsotha Suom, Howard S. Ginsberg, Andrew Bernick, Coby Klein, P. A. Buckley, Christa Salvatore, Roger A. LeBrun
2010, Journal of Vector Ecology (35) 69-74
Mosquito host‐seeking activity was studied using a custom‐designed trap to explore: (1) at which time interval of the night adult mosquito abatement would be most effective, and (2) if there exists an avian‐specific host‐seeking preference. Overnight trials using traps baited with dry ice showed that Aedes taeniorhynchus (Wiedemann) was most active at...
High tsunami frequency as a result of combined strike-slip faulting and coastal landslides
Matthew J. Hornbach, Nicole Braudy, Richard W. Briggs, Marie-Helene Cormier, Marcy B. Davis, John B. Diebold, Nicole Dieudonne, Roby Douilly, Cliff Frohlich, Sean P.S. Gulick, Harold E. Johnson III, Paul Mann, Cecilia McHugh, Katherine Ryan-Mishkin, Carol S. Prentice, Leonardo Seeber, Christopher C. Sorlien, Michael S. Steckler, Steeve Julien Symithe, Frederick W. Taylor, John Templeton
2010, Nature Geoscience (3) 783-788
Earthquakes on strike-slip faults can produce devastating natural hazards. However, because they consist predominantly of lateral motion, these faults are rarely associated with significant uplift or tsunami generation. And although submarine slides can generate tsunami, only a few per cent of all tsunami are believed to be triggered in this...
Divergent movements of walrus and sea ice in the northern Bering Sea
Chadwick V. Jay, Mark S. Udevitz, Ron Kwok, Anthony S. Fischbach, David C. Douglas
2010, Marine Ecology Progress Series (407) 293-302
The Pacific walrus Odobenus rosmarus divergens is a large Arctic pinniped of the Chukchi and Bering Seas. Reductions of sea ice projected to occur in the Arctic by mid-century raise concerns for conservation of the Pacific walrus. To understand the significance of sea ice loss to the viability of walruses,...
Habitat suitability and conservation of the giant gartersnake (Thamnophis gigas) in the Sacramento Valley of California
Brian J. Halstead, Glenn D. Wylie, Michael L. Casazza
2010, Copeia (2010) 591-599
Resource managers often have little information regarding the habitat requirements and distribution of rare species. Factor analysis-based habitat suitability models describe the ecological niche of a species and identify locations where these conditions occur on the landscape using existing occurrence data.We used factor analyses to assess the suitability of habitats...
Assessment of PDMS-water partition coefficients: implications for passive environmental sampling of hydrophobic organic compounds
Erica L. DiFilippo, Robert P. Eganhouse
2010, Environmental Science & Technology (44) 6917-6925
Solid-phase microextraction (SPME) has shown potential as an in situ passive-sampling technique in aquatic environments. The reliability of this method depends upon accurate determination of the partition coefficient between the fiber coating and water (Kf). For some hydrophobic organic compounds (HOCs), Kf values spanning 4 orders of magnitude have been...
Distribution patterns of wintering sea ducks in relation to the North Atlantic Oscillation and local environmental characteristics
Elise F. Zipkin, Beth Gardner, Andrew T. Gilbert, Allan F. O’Connell, J. Andrew Royle, Emily D. Silverman
2010, Oecologia (163) 893-902
Twelve species of North American sea ducks (Tribe Mergini) winter off the eastern coast of the United States and Canada. Yet, despite their seasonal proximity to urbanized areas in this region, there is limited information on patterns of wintering sea duck habitat use. It is difficult to gather information on...
Assessing transportation infrastructure impacts on rangelands: test of a standard rangeland assessment protocol
Michael C. Duniway, Jeffrey E. Herrick, David A. Pyke, David Toledo
2010, Rangeland Ecology and Management (63) 524-536
Linear disturbances associated with on- and off-road vehicle use on rangelands has increased dramatically throughout the world in recent decades. This increase is due to a variety of factors including increased availability of all-terrain vehicles, infrastructure development (oil, gas, renewable energy, and ex-urban), and recreational activities. In addition to the...
Are mangroves in the tropical Atlantic ripe for invasion? Exotic mangrove trees in the forests of South Florida
James W. Fourqurean, Thomas J. Smith III, Jennifer Possley, Timothy M. Collins, David Lee, Sandra Namoff
2010, Biological Invasions (12) 2509-2522
Two species of mangrove trees of Indo-Pacific origin have naturalized in tropical Atlantic mangrove forests in South Florida after they were planted and nurtured in botanic gardens. Two Bruguiera gymnorrhiza trees that were planted in the intertidal zone in 1940 have given rise to a population of at least 86...
At the foot of the shrew: Manus morphology distinguishes closely-related Cryptotis goodwini and Cryptotis griseoventris (Mammalia: Soricidae) in Central America
Neal Woodman, Ryan B. Stephens
2010, Biological Journal of the Linnean Society (99) 118-134
Small-eared shrews (Mammalia, Soricidae) of the New World genus Cryptotis are distributed from eastern North America to the northern Andes of South America. One well-defined clade in this genus is the Central American Cryptotis mexicana group, whose members are set off from other species in the genus by their variably...
Arsenic management through well modification and simulation
Keith J. Halford, Christina L. Stamos, Tracy Nishikawa, Peter Martin
2010, Ground Water (48) 526-537
Arsenic concentrations can be managed with a relatively simple strategy of grouting instead of completely destroying a selected interval of well. The strategy of selective grouting was investigated in Antelope Valley, California, where groundwater supplies most of the water demand. Naturally occurring arsenic typically exceeds concentrations of 10 (mu or...
Ants as a measure of effectiveness of habitat conservation planning in southern California
Milan J. Mitrovich, Tritia Matsuda, Krista H. Pease, Robert N. Fisher
2010, Conservation Biology (24) 1239-1248
In the United States multispecies habitat conservation plans were meant to be the solution to conflicts between economic development and protection of biological diversity. Although now widely applied, questions exist concerning the scientific credibility of the conservation planning process and effectiveness of the plans. We used ants to assess performance...
Guiding concepts for park and wilderness stewardship in an era of global environmental change
Richard J. Hobbs, David N. Cole, Laurie Yung, Erika S. Zavaleta, Gregory H. Aplet, F. Stuart Chapin III, Peter B. Landres, David J. Parsons, Nathan L. Stephenson, Peter S. White, David M. Graber, Eric S. Higgs, Constance I. Millar, John M. Randall, Kathy A. Tonnessen, Stephen Woodley
2010, Frontiers in Ecology and the Environment (8) 483-490
The major challenge to stewardship of protected areas is to decide where, when, and how to intervene in physical and biological processes, to conserve what we value in these places. To make such decisions, planners and managers must articulate more clearly the purposes of parks, what is valued, and what...
Global positioning system and associated technologies in animal behaviour and ecological research
Stanley M. Tomkiewicz, Mark R. Fuller, John G. Kie, Kirk K. Bates
2010, Philosophical Transactions of the Royal Society B: Biological Sciences (365) 2163-2176
Biologists can equip animals with global positioning system (GPS) technology to obtain accurate (less than or equal to 30 m) locations that can be combined with sensor data to study animal behaviour and ecology. We provide the background of GPS techniques that have been used to gather data for wildlife...
An empirical test of the 'shark nursery area concept' in Texas bays using a long-term fisheries-independent data set
John T. Froeschke, Gregory W. Stunz, Blair Sterba-Boatwright, Mark L. Wildhaber
2010, Aquatic Biology (11) 65-76
Using a long-term fisheries-independent data set, we tested the 'shark nursery area concept' proposed by Heupel et al. (2007) with the suggested working assumptions that a shark nursery habitat would: (1) have an abundance of immature sharks greater than the mean abundance across all habitats where they occur; (2) be...
Geomorphic response of sandbars to the March 2008 high-flow experiment on the Colorado River downstream from Glen Canyon Dam
Paul E. Grams, Joseph E. Hazel Jr., John C. Schmidt, Matt Kaplinski, Scott Wright, David J. Topping, Theodore S. Melis
2010, Book, Proceedings of the 2nd Joint Federal Interagency Conference on Sedimentation and Hydrologic Modeling
The completion of Glen Canyon Dam in 1963 drastically altered the downstream flow regime and resulted in more than a 90 percent reduction of sand supply to the Colorado River in Grand Canyon National Park. Sandbars that were maintained by annual floods and a large sediment supply are now fewer...
Distribution and interplay of geologic processes on Titan from Cassini radar data
R. M. C. Lopes, E. R. Stofan, R. Peckyno, J. Radebaugh, K. L. Mitchell, Giuseppe Mitri, C. A. Wood, R. L. Kirk, S. D. Wall, J. I. Lunine, A. Hayes, R. Lorenz, Tom Farr, L. Wye, J. Craig, R. J. Ollerenshaw, M. Janssen, A. LeGall, F. Paganelli, R. West, B. Stiles, P. Callahan, Y. Anderson, P. Valora, L. Soderblom
2010, Icarus (205) 540-558
The Cassini Titan Radar Mapper is providing an unprecedented view of Titan’s surface geology. Here we use Synthetic Aperture Radar (SAR) image swaths (Ta–T30) obtained from October 2004 to December 2007 to infer the geologic processes that have shaped Titan’s surface. These SAR swaths cover about 20% of the surface,...
