An annotated list of aquatic insects of Fort Sill, Oklahoma, excluding diptera with notes on several new state records
R.E. Zuellig, B.C. Kondratieff, J.P. Schmidt, R.S. Durfee, D.E. Ruiter, I.E. Prather
2006, Journal of the Kansas Entomological Society (79) 34-54
Qualitative collections of aquatic insects were made at Fort Sill, Lawton, Oklahoma, between 2002 and 2004. Ephemeroptera, Plecoptera, Trichoptera, Odonata, Coleoptera, aquatic Heteroptera, Neuroptera, and Megaloptera were targeted. Additional records are included from a survey that took place in 1999. More than 11,000 specimens from more than 290 collections were...
Effects of elevated CO2 on fine root dynamics in a Mojave Desert community: A FACE study
D.L. Phillips, M. G. Johnson, D.T. Tingey, C.E. Catricala, T.L. Hoyman, R.S. Nowak
2006, Global Change Biology (12) 61-73
Fine roots (??? 1mm diameter) are critical in plant water and nutrient absorption, and it is important to understand how rising atmospheric CO2 will affect them as part of terrestrial ecosystem responses to global change. This study's objective was to determine effects of elevated CO2 on production, mortality, and standing...
Seasonal migration and environmental conditions of Pacific halibut Hippoglossus stenolepis, elucidated from pop-up archival transmitting (PAT) tags
Timothy Loher, Andrew C. Seitz
2006, Marine Ecology Progress Series (317) 259-271
Pop-up archival transmitting (PAT) tags were used to study the fall migration of halibut in the Gulf of Alaska (GOA). We tagged 6 Pacific halibut Hippoglossus stenolepis on summer feeding grounds in the eastern GOA and another 6 in the western GOA from June 13 to August 6, 2002. The...
Seed germination of cirsium arvense and Lepidium latifolium: Implications for management of montane wetlands
M.K. Laubhan, T.L. Shaffer
2006, Wetlands (26) 69-78
Cirsium arvense and Lepidium latifolium are species that can aggressively invade wetland margins and potentially reduce biodiversity and alter ecosystem function. Although expansion of these species primarily occurs via rhizomatous growth, seeds are thought to be important in initial establishment. We conducted this study to investigate differences in seed germination...
Biogeochemical characterization of an undisturbed highly acidic, metal-rich bryophyte habitat, east-central Alaska, U.S.A.
L. P. Gough, R. G. Eppinger, Paul H. Briggs, S. Giles
2006, Arctic, Antarctic, and Alpine Research (38) 522-529
We report on the geochemistry of soil and bryophyte-laden sediment and on the biogeochemistry of willows growing in an undisturbed volcanogenic massive sulfide deposit in the Alaska Range ecoregion of east-central Alaska. We also describe an unusual bryophyte assemblage found growing in the acidic metal-rich waters that drain the area....
Factors influencing soil invertebrate communities in riparian grasslands of the central platte river floodplain
C.A. Davis, J. E. Austin, D. A. Buhl
2006, Wetlands (26) 438-454
In the Platte River Valley of central Nebraska, USA, riparian grasslands (also known as wet meadows) have been severely impacted by a reduction in river flows, causing lower ground-water levels and altered seasonal hydroperiods. The potential impacts of these hydrologic changes, as well as the environmental factors that influence wet...
Cassini/VIMS hyperspectral observations of the HUYGENS landing site on Titan
S. Rodriguez, Stéphane Le Mouélic, Christophe Sotin, H. Clenet, R. N. Clark, B. Buratti, R. H. Brown, T. B. McCord, P. D. Nicholson, K. H. Baines
2006, Planetary and Space Science (54) 1510-1523
Titan is one of the primary scientific objectives of the NASA-ESA-ASI Cassini-Huygens mission. Scattering by haze particles in Titan's atmosphere and numerous methane absorptions dramatically veil Titan's surface in the visible range, though it can be studied more easily in some narrow infrared windows. The Visual and Infrared Mapping Spectrometer...
Geology and geochemistry of jasperoids from the Gold Bar district, Nevada
O. Yigit, A. H. Hofstra, M.W. Hitzman, E.P. Nelson
2006, Mineralium Deposita (41) 527-547
Gold Bar is one of several Carlin-type gold mining districts located in the Battle Mountain-Eureka trend, Nevada. It is composed of one main deposit, Gold Bar; five satellite deposits; and four resources that contain 1.6 Moz (50 t) of gold. All of the deposits and resources occur at the intersection...
Sediment and nutrient accumulation within lowland bottomland ecosystems: An example from the Atchafalaya River Basin, Louisiana
C.R. Hupp, G.B. Noe
2006, Conference Paper, Hydrology and Management of Forested Wetlands - Proceeding of the International Conference
Sediment and nutrient deposition, storage, and transformations are important environmental functions of riverine forested wetland ecosystems, yet documentation and interpretation of sedimentation/nutrient processes remain incomplete. Our studies located in the Coastal Plain of southeastern USA, including the Atchafalaya Basin, La. (a distributary of the Mississippi River) serve as example for...
Biogeochemical transport in the Loxahatchee River estuary, Florida: The role of submarine groundwater discharge
P.W. Swarzenski, W. H. Orem, B. F. McPherson, M. Baskaran, Y. Wan
2006, Marine Chemistry (101) 248-265
The distributions of dissolved organic carbon (DOC), Ba, U, and a suite of naturally occurring radionuclides in the U/Th decay series (222Rn, 223,224,226,228Ra) were studied during high- and low-discharge conditions in the Loxahatchee River estuary, Florida to examine the role of submarine groundwater discharge in estuarine transport. The fresh water...
Feasibility of an implantable capsule for limiting lifespan of grass carp
R.M. Thomas, L.E. Miranda, J.P. Kirk
2006, Journal of Aquatic Plant Management (44) 80-89
The grass carp (Ctenopharyngodon idella) is an herbivorous cyprinid stocked to control undesirable aquatic vegetation. However, stocking grass carp presents several problems including complete eradication of submersed aquatic vegetation, dispersal out of the target area, adverse effects on fish communities, and damage to waterfowl habitat and native vegetation. The purpose...
Analysis of a mesoscale infiltration and water seepage test in unsaturated fractured rock: Spatial variabilities and discrete fracture patterns
Q. Zhou, R. Salve, H.-H. Liu, J.S.Y. Wang, D. Hudson
2006, Journal of Contaminant Hydrology (87) 96-122
A mesoscale (21??m in flow distance) infiltration and seepage test was recently conducted in a deep, unsaturated fractured rock system at the crossover point of two underground tunnels. Water was released from a 3??m ?? 4??m infiltration plot on the floor of an alcove in the upper tunnel, and seepage...
Clonal variation in response to salinity and flooding stress in four marsh macrophytes of the northern gulf of Mexico, USA
R.J. Howard, P.S. Rafferty
2006, Environmental and Experimental Botany (56) 301-313
Intraspecific variation in stress tolerance can be an important factor influencing plant population structure in coastal wetland habitats. We studied clones of four species of emergent marsh macrophytes native to the northern coast of the Gulf of Mexico in Louisiana, USA, to examine variation in response to salinity and flooding...
Cladophora (Chlorophyta) spp. harbor human bacterial pathogens in nearshore water of Lake Michigan
S. Ishii, T. Yan, D.A. Shively, M.N. Byappanahalli, R.L. Whitman, M.J. Sadowsky
2006, Applied and Environmental Microbiology (72) 4545-4553
Cladophora glomerata, a macrophytic green alga, is commonly found in the Great Lakes, and significant accumulations occur along shorelines during the summer months. Recently, Cladophora has been shown to harbor high densities of the fecal indicator bacteria Escherichia coli and enterococci. Cladophora may also harbor human pathogens; however, until now, no studies to address this question...
The allometric relationship between resting metabolic rate and body mass in wild waterfowl (Anatidae) and an application to estimation of winter habitat requirements
M. R. Miller, J. McA Eadie
2006, Condor (108) 166-177
Breeding densities and migration periods of Common Snipe in Colorado were investigated in 1974-75. Sites studied were near Fort Collins and in North Park, both in north central Colorado; in the Yampa Valley in northwestern Colorado; and in the San Luis Valley in south central Colorado....Estimated densities of breeding snipe...
Upstream migration of two pre-spawning shortnose sturgeon passed upstream of Pinopolis Dam, Cooper River, South Carolina
S.T. Finney, J. Jeffery Isely, D.W. Cooke
2006, Southeastern Naturalist (5) 369-375
Two shortnose sturgeon were artificially passed above the Pinopolis Lock and Dam into the Santee-Cooper Lakes in order to simulate the use of a fish-passage mechanism. Movement patterns and spawning behavior were studied to determine the potential success of future shortnose sturgeon migrations if and when a fish-migration bypass structure...
Variability and regulation of denitrification in an Upper Mississippi River backwater
E.A. Strauss, W. B. Richardson, J.C. Cavanaugh, L.A. Bartsch, Rebecca M. Kreiling, A.J. Standorf
2006, Journal of the North American Benthological Society (25) 596-606
Sediments in the backwaters of the Upper Mississippi River (UMR) are highly organic and provide an optimal environment for N removal. We monitored an 8.6-ha UMR backwater site near La Crosse, Wisconsin, for nearly 3 y to assess temporal variability, seasonal trends, and the factors regulating denitrification. We measured rates...
The influence of disturbance events on survival and dispersal rates of Florida box turtles
C.K. Dodd Jr., A. Ozgul, M.K. Oli
2006, Ecological Applications (16) 1936-1944
Disturbances have the potential to cause long-term effects to ecosystem structure and function, and they may affect individual species in different ways. Long-lived vertebrates such as turtles may be at risk from such events, inasmuch as their life histories preclude rapid recovery should extensive mortality occur. We applied capture–mark–recapture models...
Water-clover ferns, Marsilea, in the Southeastern United States
Colette C. Jacono, David M. Johnson
2006, Castanea (71) 1-14
A surge in the collection of exotic Marsilea, M. mutica, M. minuta and M. hirsuta in the southeastern United States has prompted the need for updated identification aids. This study provides an annotated key to all water-clover ferns occurring in the region. It describes and illustrates recently documented exotic species and a previously misidentified western introduction....
Modeling spatial and temporal variations in temperature and salinity during stratification and overturn in Dexter Pit Lake, Tuscarora, Nevada, USA
Laurie S. Balistrieri, R.N. Tempel, L.L. Stillings, L.A. Shevenell
2006, Applied Geochemistry (21) 1184-1203
This paper examines the seasonal cycling of temperature and salinity in Dexter pit lake in arid northern Nevada, and describes an approach for modeling the physical processes that operate in such systems. The pit lake contains about 596,200 m3 of dilute, near neutral (pHs 6.7–9) water. Profiles of temperature, conductivity, and selected...
Combined time-series resistivity and geochemical tracer techniques to examine submarine groundwater discharge at Dor Beach, Israel
P.W. Swarzenski, W. C. Burnett, W.J. Greenwood, B. Herut, R. Peterson, N. Dimova, Y. Shalem, Y. Yechieli, Y. Weinstein
2006, Geophysical Research Letters (33)
A high-resolution, stationary geophysical and geochemical survey was conducted at Dor Beach, Israel, to examine the shallow coastal hydrogeology and its control on the exchange of submarine groundwater with the shallow Mediterranean Sea. Time-series resistivity profiles using a new 56 electrode (112-m long) marine cable produced detailed profiles of the...
Potential effects of recurrent low oxygen conditions on the Illinois Cave amphipod
S.V. Panno, Keith C. Hackley, W.R. Kelly, H.-H. Hwang, F.M. Wilhelm, S.J. Taylor, B.J. Stiff
2006, Journal of Cave and Karst Studies (68) 55-63
The caves of Illinois' sinkhole plain are the sole habitat of the Illinois Cave amphipod (Gammarus acherondytes), a federally endangered species. The sinkhole plain is a hydrologically-connected sequence of karstified limestone that constitutes an extensive karst aquifer which serves as an important source of potable water for area residents. During...
Estimated sand and gravel resources of the South Merrimack, Hillsborough County, New Hampshire, 7.5-minute quadrangle
D. M. Sutphin, L.J. Drew, B.K. Fowler
2006, Natural Resources Research (15) 183-203
A computer methodology is presented that allows natural aggregate producers, local governmental, and nongovernmental planners to define specific locations that may have sand and gravel deposits meeting user-specified minimum size, thickness, and geographic and geologic criteria, in areas where the surficial geology has been mapped. As an example, the surficial...
A landscape-scale model of yellow-billed loon (Gavia adamsii) habitat preferences in northern alaska
Susan L. Earnst, Robert Platte, Laura Bond
2006, Hydrobiologia (567) 227-236
We modeled yellow-billed loon (Gavia adamsii) habitat preferences in a 23,500 km2 area of northern Alaska using intensive aerial surveys and landscape-scale habitat descriptors. Of the 757 lakes censused, yellow-billed loons occupied 15% and Pacific loons (G. pacifica) 42%. Lake area, depth, proportion of shoreline in aquatic vegetation,...
Modeling effects of multinode wells on solute transport
Leonard F. Konikow, G.Z. Hornberger
2006, Ground Water (44) 648-660
Long-screen wells or long open boreholes with intraborehole flow potentially provide pathways for contaminants to move from one location to another in a ground water flow system. Such wells also can perturb a flow field so that the well will not provide water samples that are representative of ground water...
