Limits on the adaptability of coastal marshes to rising sea level
Matthew L. Kirwan, Glenn R. Guntenspergen, Andrea D’Alpaos, James T. Morris, Simon M. Mudd, Stijn Temmerman
2010, Geophysical Research Letters (37) 1-5
Assumptions of a static landscape inspire predictions that about half of the world's coastal wetlands will submerge during this century in response to sea-level acceleration. In contrast, we use simulations from five numerical models to quantify the conditions under which ecogeomorphic feedbacks allow coastal wetlands to adapt to projected changes...
Match or mismatch: The influence of phenology on size-dependent life history and divergence in population structure
Jost Borcherding, Peter Beeck, Donald L. DeAngelis, Werner R. Scharf
2010, Journal of Animal Ecology (79) 1101-1112
1. In gape-limited predators, body size asymmetries determine the outcome of predator-prey interactions. Due to ontogenetic changes in body size, the intensity of intra- and interspecific interactions may change rapidly between the match situation of a predator-prey system and the mismatch situation in which competition, including competition with the prey, dominates. 2....
Marine tephrochronology of the Mt. Edgecumbe volcanic field, southeast Alaska, USA
Jason A. Addison, James E. Beget, Thomas A. Ager, Bruce P. Finney
2010, Quaternary Research (73) 277-292
The Mt. Edgecumbe Volcanic Field (MEVF), located on Kruzof Island near Sitka Sound in southeast Alaska, experienced a large multiple-stage eruption during the last glacial maximum (LGM)-Holocene transition that generated a regionally extensive series of compositionally similar rhyolite tephra horizons and a single well-dated dacite (MEd) tephra. Marine sediment cores...
Landscape and vegetation effects on avian reproduction on bottomland forest restorations
Daniel J. Twedt, Scott G. Somershoe, Kirsten R. Hazler, Robert J. Cooper
2010, Journal of Wildlife Management (74) 423-436
Forest restoration has been undertaken on >200,000 ha of agricultural land in the Mississippi Alluvial Valley, USA, during the past few decades. Decisions on where and how to restore bottomland forests are complex and dependent upon landowner objectives, but for conservation of silvicolous (forest-dwelling) birds, ecologists have espoused restoration through planting...
Making molehills out of mountains: Landscape genetics of the Mojave desert tortoise
Bridgette E. Hagerty, Kenneth E. Nussear, Todd C. Esque, C. Richard Tracy
2010, Landscape Ecology (26) 267-280
Heterogeneity in habitat often influences how organisms traverse the landscape matrix that connects populations. Understanding landscape connectivity is important to determine the ecological processes that influence those movements, which lead to evolutionary change due to gene flow. Here, we used landscape genetics and statistical models to evaluate hypotheses that could...
Effects of urbanization on carnivore species distribution and richness
Miguel A. Ordenana, Kevin R. Crooks, Erin E. Boydston, Robert N. Fisher, Lisa M. Lyren, Shalene Siudyla, Christopher D. Haas, Sierra Harris, Stacie A. Hathaway, Greta M. Turschak, A. Keith Miles, Dirk H. Van Vuren
2010, Journal of Mammalogy (91) 1322-1331
Urban development can have multiple effects on mammalian carnivore communities. We conducted a meta-analysis of 7,929 photographs from 217 localities in 11 camera-trap studies across coastal southern California to describe habitat use and determine the effects of urban proximity (distance to urban edge) and intensity (percentage of area urbanized) on...
Effects of Hurricane Katrina on an incipient population of giant salvinia Salvinia molesta in the lower Pascagoula River, Mississippi
Pam L. Fuller, Mike G. Pursley, Dale Diaz, Wesley Devers
2010, Gulf and Caribbean Research (22) 63-66
The objectives of this study were to: 1) survey the lower Pascagoula River Basin and determine the post–storm distribution and abundance of giant salvinia; 2) control any remaining giant salvinia through physical and/or chemical means; 3) determine the fate of the bio–control agents; and 4) determine if re–introduction of salvinia...
Alluvial diamond resource potential and production capacity assessment of Mali
Peter G. Chirico, Francis Barthelemy, Fatiaga Kone
2010, Scientific Investigations Report 2010-5044
In May of 2000, a meeting was convened in Kimberley, South Africa, and attended by representatives of the diamond industry and leaders of African governments to develop a certification process intended to assure that rough, exported diamonds were free of conflictual concerns. This meeting was supported later in 2000 by...
Facilitation drives 65 years of vegetation change in the Sonoran Desert
Bradley J. Butterfield, Julio L. Betancourt, Raymond M. Turner, John M. Briggs
2010, Ecology (91) 1132-1139
Ecological processes of low‐productivity ecosystems have long been considered to be driven by abiotic controls with biotic interactions playing an insignificant role. However, existing studies present conflicting evidence concerning the roles of these factors, in part due to the short temporal extent of most data sets and inability to test...
Formation of the Wiesloch Mississippi Valley-type Zn-Pb-Ag deposit in the extensional setting of the Upper Rhinegraben, SW Germany
Katharina Pfaff, Ludwig H. Hildebrandt, David L. Leach, Dorrit E. Jacob, Gregor Markl
2010, Mineralium Deposita (45) 647-666
The Mississippi Valley-type (MVT) Zn–Pb–Ag deposit in the Wiesloch area, Southwest Germany, is controlled by graben-related faults of the Upper Rhinegraben. Mineralization occurs as vein fillings and irregular replacement ore bodies consisting of sphalerite, banded sphalerite, galena, pyrite, sulfosalts (jordanite and geocronite), barite, and calcite in the Middle Triassic carbonate...
Impact craters on Titan
Charles A. Wood, Ralph Lorenz, Randy Kirk, Rosaly Lopes, Karl Mitchell, Ellen Stofan, Cassini RADAR Team
2010, Icarus 334-344
Five certain impact craters and 44 additional nearly certain and probable ones have been identified on the 22% of Titan's surface imaged by Cassini's high-resolution radar through December 2007. The certain craters have morphologies similar to impact craters on rocky planets, as well as two with radar bright, jagged rims....
Alluvial diamond resource potential and production capacity assessment of the Central African Republic
Peter G. Chirico, Francis Barthelemy, Francois A. Ngbokoto
2010, Scientific Investigations Report 2010-5043
In May of 2000, a meeting was convened in Kimberley, South Africa, and attended by representatives of the diamond industry and leaders of African governments to develop a certification process intended to assure that rough, exported diamonds were free of conflict concerns. This meeting was supported later in 2000 by...
Forecasting hurricane impact on coastal topography: Hurricane Ike
Nathaniel G. Plant, Hilary F. Stockdon, Sallenger Jr., Michael J. Turco, Jeffery W. East, Arthur A. Taylor, Wilson A. Shaffer
2010, Eos, Transactions, American Geophysical Union (91) 65-72
Extreme storms can have a profound impact on coastal topography and thus on ecosystems and human-built structures within coastal regions. For instance, landfalls of several recent major hurricanes have caused significant changes to the U.S. coastline, particularly along the Gulf of Mexico. Some of these hurricanes (e.g., Ivan in 2004,...
Flood hydrology and methylmercury availability in Coastal Plain rivers
Paul M. Bradley, Celeste A. Journey, Francis H. Chapelle, Mark A. Lowery, Paul Conrads
2010, Environmental Science & Technology (44) 9285-9290
Mercury (Hg) burdens in top-predator fish differ substantially between adjacent South Carolina Coastal Plain river basins with similar wetlands coverage. In the Congaree River, floodwaters frequently originate in the Blue Ridge and Piedmont regions, where wetlands coverage and surface water dissolved methylmercury (MeHg) concentrations are low. Piedmont-driven flood events can...
Food-web structure of seep sediment macrobenthos from the Gulf of Mexico
Amanda W.J. Demopoulos, Daniel Gualtieri, Kaitlin Kovacs
2010, Deep-Sea Research Part II: Topical Studies in Oceanography (57) 1972-1981
The slope environment of the Gulf of Mexico (GOM) supports dense communities of seep megafaunal invertebrates that rely on endosymbiotic bacteria for nutrition. Seep sediments also contain smaller macrofaunal invertebrates whose nutritional pathways are not well understood. Using stable-isotope analysis, we investigate the utilization of chemosynthetically fixed and methane-derived organic...
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...
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...
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,...
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...
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...
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...
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...
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...
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...
