Assemblage patterns of fish functional groups relative to habitat connectivity and conditions in floodplain lakes
S. Miyazono, J.N. Aycock, L.E. Miranda, T.E. Tietjen
2010, Ecology of Freshwater Fish (19) 578-585
We evaluated the influences of habitat connectivity and local environmental factors on the distribution and abundance patterns of fish functional groups in 17 floodplain lakes in the Yazoo River Basin, USA. The results of univariate and multivariate analyses showed that species-environmental relationships varied with the functional groups. Species richness and...
Sensitivity of early life stages of freshwater mussels (Unionidae) to acute and chronic toxicity of lead, cadmium, and zinc in water
Ning Wang, Christopher G. Ingersoll, Chris D. Ivey, Douglas K. Hardesty, Thomas W. May, T. Augspurger, A.D. Roberts, E. Van Genderen, M.C. Barnhart
2010, Environmental Toxicology and Chemistry (29) 2053-2063
Toxicity of lead, cadmium, or zinc to early life stages of freshwater mussels (fatmucket, Lampsilis siliquoidea; Neosho mucket, L. rafinesqueana) was evaluated in 48‐h exposures with mussel larvae (glochidia), in 96‐h exposures with newly transformed (5‐d‐old) and two‐ or six‐month‐old juvenile mussels, or in 28‐d exposures with two‐ or four‐month‐old mussels in...
Testing the limits of Paleozoic chronostratigraphic correlation via high-resolution (<500 k.y.) integrated conodont, graptolite, and carbon isotope (δ13Ccarb) biochemostratigraphy across the Llandovery–Wenlock (Silurian) boundary: Is a unified Phanerozoic time scale achievable?
Bradley D. Cramer, David K. Loydell, Christian Samtleben, Axel Munnecke, Dimitri Kaljo, Peep Mannik, Tonu Martma, Lennart Jeppsson, Mark A. Kleffner, James E. Barrick, Craig A. Johnson, Poul Emsbo, Michael M. Joachimski, Torsten Bickert, Matthew R. Saltzman
2010, Geological Society of America Bulletin (122) 1700-1716
The resolution and fidelity of global chronostratigraphic correlation are direct functions of the time period under consideration. By virtue of deep-ocean cores and astrochronology, the Cenozoic and Mesozoic time scales carry error bars of a few thousand years (k.y.) to a few hundred k.y. In contrast, most of the Paleozoic...
Late Ordovician-Early Silurian chitinozoans from north-eastern and western Illinois, USA
A. Butcher, Donald G. Mikulic, Joanne Kluessendorf
2010, Review of Palaeobotany and Palynology (159) 81-93
Samples of uppermost Ordovician and Silurian strata from two cores from north-eastern and western Illinois were processed for chitinozoans. Due to apparent sea-floor oxidation or palaeoenvironmental constraints, very few samples yielded specimens, but those that did allow tentative correlation with established biostratigraphical zonations for the Chitinozoa. Samples from the Wilhelmi...
Controls of suspended sediment concentration, nutrient content, and transport in a subtropical wetland
G.B. Noe, J. W. Harvey, R.W. Schaffranek, L. G. Larsen
2010, Wetlands (30) 39-54
Redistribution of largely organic sediment from low elevation sloughs to higher elevation ridges is a leading hypothesis for the formation and maintenance of the native ridge and slough landscape pattern found in peat wetlands of the Florida Everglades. We tested this redistribution hypothesis by measuring the concentration and characteristics of...
A spatial resolution threshold of land cover in estimating terrestrial carbon sequestration in four counties in Georgia and Alabama, USA
S.Q. Zhao, S. Liu, Z. Li, Terry L. Sohl
2010, Biogeosciences (7) 71-80
Changes in carbon density (i.e., carbon stock per unit area) and land cover greatly affect carbon sequestration. Previous studies have shown that land cover change detection strongly depends on spatial scale. However, the influence of the spatial resolution of land cover change information on the estimated terrestrial carbon sequestration is...
Geochemical constraints on the origin and volume of gas in the New Albany Shale (Devonian-Mississippian), eastern Illinois Basin
D. Strapoc, Maria Mastalerz, A. Schimmelmann, A. Drobniak, N.R. Hasenmueller
2010, American Association of Petroleum Geologists Bulletin (94) 1713-1740
This study involved analyses of kerogen petrography, gas desorption, geochemistry, microporosity, and mesoporosity of the New Albany Shale (Devonian-Mississippian) in the eastern part of the Illinois Basin. Specifically, detailed core analysis from two locations, one in Owen County, Indiana, and one in Pike County, Indiana, has been conducted. The gas...
GIS-based spatial regression and prediction of water quality in river networks: A case study in Iowa
X. Yang, W. Jin
2010, Journal of Environmental Management (91) 1943-1951
Nonpoint source pollution is the leading cause of the U.S.'s water quality problems. One important component of nonpoint source pollution control is an understanding of what and how watershed-scale conditions influence ambient water quality. This paper investigated the use of spatial regression to evaluate the impacts of watershed characteristics on...
Distribution, behavior, and transport of inorganic and methylmercury in a high gradient stream
J.R. Flanders, R.R. Turner, T. Morrison, R. Jensen, J. Pizzuto, K. Skalak, R. Stahl
2010, Applied Geochemistry (25) 1756-1769
Concentrations of Hg remain elevated in physical and biological media of the South River (Virginia, USA), despite the cessation of the industrial use of Hg in its watershed nearly six decades ago, and physical characteristics that would not seem to favor Hg(II)-methylation. A 3-a study of inorganic Hg (IHg) and...
Sediment contamination of residential streams in the metropolitan Kansas City area, USA: Part II. whole-sediment toxicity to the amphipod hyalella azteca
J. Tao, Christopher G. Ingersoll, Nile E. Kemble, J.R. Dias, J.B. Murowchick, G. Welker, D. Huggins
2010, Archives of Environmental Contamination and Toxicology (59) 370-381
This is the second part of a study that evaluates the influence of nonpoint sources on the sediment quality of five adjacent streams within the metropolitan Kansas City area, central United States. Physical, chemical, and toxicity data (Hyalella azteca 28-day whole-sediment toxicity test) for 29 samples collected in 2003 were...
The Reimer Diatom Herbarium: An important resource for teaching and research
S.J. Rushforth, M.B. Edlund, S. A. Spaulding, E. F. Stoermer
2010, Conference Paper, Proceedings of the Academy of Natural Sciences of Philadelphia
The Reimer Diatom Herbarium (ILH) at Iowa Lakeside Laboratory (ILL), a field station of Iowa's state universities, contains 3,280 permanent diatom slides of collections made from prairie potholes, alkaline fens, acid bogs, eutrophic lakes, saline lakes, Pleistocene paleolakes, and Miocene fossil deposits near ILL. The herbarium has a focus on...
Contrasting activity patterns of sympatric and allopatric black and grizzly bears
C.C. Schwartz, S.L. Cain, S. Podruzny, S. Cherry, L. Frattaroli
2010, Journal of Wildlife Management (74) 1628-1638
The distribution of grizzly (Ursus arctos) and American black bears (U. americanus) overlaps in western North America. Few studies have detailed activity patterns where the species are sympatric and no studies contrasted patterns where populations are both sympatric and allopatric. We contrasted activity patterns for sympatric black and grizzly bears...
Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States: Surficial Geology
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 491-25
This tabular data set represents the area of surficial geology types in square meters compiled for every MRB_E2RF1 catchment of selected Major River Basins (MRBs, Crawford and others, 2006). The source data set is the "Digital data set describing surficial geology in the conterminous US" (Clawges and Price, 1999).The MRB_E2RF1...
Latitudinal variations in Titan's methane and haze from Cassini VIMS observations
P.F. Penteado, C.A. Griffith, M.G. Tomasko, S. Engel, C. See, L. Doose, K. H. Baines, R. H. Brown, B. J. Buratti, R. Clark, P. Nicholson, Christophe Sotin
2010, Icarus (206) 352-365
We analyze observations taken with Cassini's Visual and Infrared Mapping Spectrometer (VIMS), to determine the current methane and haze latitudinal distribution between 60??S and 40??N. The methane variation was measured primarily from its absorption band at 0.61 ??m, which is optically thin enough to be sensitive to the methane abundance...
Arsenic in groundwater in the North Carolina Eastern slate belt (Esb): Nash and halifax counties, north carolina
J.C. Reid, W.T. Haven, D.D. Eudy, R.M. Milosh, E.G. Stafford
2010, Southeastern Geology (47) 117-122
Naturally occurring arsenic-contaminated groundwater is present within the Eastern Slate Belt (ESB) of North Carolina. Long-term, integrated geologic and geo-chemical investigations havedetermined the presence of arsenic by analyzing precipitates from first and second order streams under base flow conditions. When groundwater discharges into streams, arsenic and other metals are precipitated...
Probable causes of increasing brucellosis in free-ranging elk of the Greater Yellowstone Ecosystem
Paul C. Cross, E.K. Cole, A. P. Dobson, W.H. Edwards, K.L. Hamlin, G. Luikart, A.D. Middleton, B.M. Scurlock, P.J. White
2010, Ecological Applications (20) 278-288
While many wildlife species are threatened, some populations have recovered from previous overexploitation, and data linking these population increases with disease dynamics are limited. We present data suggesting that free-ranging elk (Cervus elaphus) are a maintenance host for Brucella abortus in new areas of the Greater Yellowstone Ecosystem (GYE). Brucellosis...
Protein expression and genetic structure of the coral Porites lobata in an environmentally extreme Samoan back reef: Does host genotype limit phenotypic plasticity?
D.J. Barshis, J.H. Stillman, R.D. Gates, R.J. Toonen, L.W. Smith, C. Birkeland
2010, Molecular Ecology (19) 1705-1720
The degree to which coral reef ecosystems will be impacted by global climate change depends on regional and local differences in corals' susceptibility and resilience to environmental stressors. Here, we present data from a reciprocal transplant experiment using the common reef building coral Porites lobata between a highly fluctuating back...
Dacite petrogenesis on mid-ocean ridges: Evidence for oceanic crustal melting and assimilation
V.D. Wanless, M.R. Perfit, W.I. Ridley, E. Klein
2010, Journal of Petrology (51) 2377-2410
Whereas the majority of eruptions at oceanic spreading centers produce lavas with relatively homogeneous mid-ocean ridge basalt (MORB) compositions, the formation of tholeiitic andesites and dacites at mid-ocean ridges (MORs) is a petrological enigma. Eruptions of MOR high-silica lavas are typically associated with ridge discontinuities and have produced regionally significant...
Stratigraphic response across a structurally dynamic shelf: The latest guadalupian composite sequence at Walnut Canyon, New Mexico, U.S.A
J. Rush, C. Kerans
2010, Journal of Sedimentary Research (80) 808-828
The uppermost Yates and Tansill formations (Late Permian), as exposed along Walnut Canyon in Carlsbad Caverns National Park, New Mexico, USA, provide a unique opportunity to document the depositional architecture of a progradational, oversteepened, and mechanically failure-prone carbonate platform. Detailed facies mapping permitted critical assessment of depositional processes operating along...
Occurrence of organic wastewater and other contaminants in cave streams in northeastern Oklahoma and northwestern Arkansas
Joseph R. Bidwell, Carol Becker, S. Hensley, R. Stark, Michael T. Meyer
2010, Archives of Environmental Contamination and Toxicology (58) 286-298
The prevalence of organic wastewater compounds in surface waters of the United States has been reported in a number of recent studies. In karstic areas, surface contaminants might be transported to groundwater and, ultimately, cave ecosystems, where they might impact resident biota. In this study, polar organic chemical integrative samplers...
Diversity in destinations, routes and timing of small adult and sub-adult striped bass Morone saxatilis on their southward autumn migration
Martha E. Mather, John T. Finn, Sarah M. Pautzke, Dewayne A. Fox, Tom Savoy, Harold M. Brundage III, Linda A. Deegan, Robert M. Muth
2010, Journal of Fish Biology (77) 2326-2337
Almost three-quarters of the 46 young adult and sub-adult striped bass Morone saxatilis that were acoustically tagged in Plum Island Estuary, Massachusetts, U.S.A., in the summer of 2006 were detected in one or more southern coastal arrays during their autumn migration. On the basis of the trajectories along which these<span...
Environmental controls on drainage behavior of an ephemeral stream
K.W. Blasch, T.P.A. Ferre, J.A. Vrugt
2010, Stochastic Environmental Research and Risk Assessment (24) 1077-1087
Streambed drainage was measured at the cessation of 26 ephemeral streamflow events in Rillito Creek, Tucson, Arizona from August 2000 to June 2002 using buried time domain reflectometry (TDR) probes. An unusual drainage response was identified, which was characterized by sharp drainage from saturation to near field capacity at each...
Modelling detection probabilities to evaluate management and control tools for an invasive species
M.T. Christy, A. A. Yackel Adams, G.H. Rodda, J. A. Savidge, C.L. Tyrrell
2010, Journal of Applied Ecology (47) 106-113
For most ecologists, detection probability (p) is a nuisance variable that must be modelled to estimate the state variable of interest (i.e. survival, abundance, or occupancy). However, in the realm of invasive species control, the rate of detection and removal is the rate-limiting step for management of this pervasive environmental...
Tidal freshwater wetland herbivory in Anacostia Park
Cairn Krafft, Jeff S. Hatfield, Richard S. Hammerschlag
2010, Natural Resource Technical Report NPS/NCR/NCRO/NRTR2010/002
Herbivory has played a major role in dictating vegetation abundance and species composition at Kingman Marsh in Anacostia Park, Washington, D.C., since restoration of this tidal freshwater wetland was initiated in 2000. In June 2009 an herbivory study was established to document the impacts of resident Canada goose (Branta canadensis...
Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States: Average Daily Maximum Temperature, 2002
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 491-28
This tabular data set represents the average daily maximum temperature in Celsius multiplied by 100 for 2002, compiled for every MRB_E2RF1 catchment of selected Major River Basins (MRBs, Crawford and others, 2006). The source data were the Near-Real-Time High-Resolution Monthly Average Maximum/Minimum Temperature for the Conterminous United States for 2002...
