Heavy metals in wild rice from northern Wisconsin
J. P. Bennett, E. Chiriboga, J. Coleman, D.M. Waller
2000, Science of the Total Environment (246) 261-269
Wild rice grain samples from various parts of the world have been found to have elevated concentrations of heavy metals, raising concern for potential effects on human health. It was hypothesized that wild rice from north-central Wisconsin could potentially have elevated concentrations of some heavy metals because of possible exposure...
Field surveys of Midwestern and Northeastern Fish and Wildlife Service lands for the presence of abnormal frogs and toads
K. A. Converse, J. Mattsson, L. Eaton-Poole
2000, Journal of the Iowa Academy of Science (107) 160-167
The national distribution of information on the discovery of malformations in Minnesota frogs in 1995 stimulated collection and examination of newly metamorphosed frogs during 1996. By late summer and early fall of 1996, malformed frogs and toads were reported on U.S. Fish and Wildlife Service (USFWS) lands in Vermont (Northeast,...
16-year trends in elements of lichens at Theodore Roosevelt National Park, ND
J. P. Bennett, C. M. Wetmore
2000, Science of the Total Environment (263) 231-241
An epiphytic lichen and a soil lichen in two very closely related genera (Parmelia sulcata and Xanthoparmelia chlorochroa, respectively) were sampled 16 years apart at Theodore Roosevelt National Park in North Dakota and measured for their elemental content. Mercury and cadmium decreased approximately 30% over the time period in both...
Recovery of tall cotton-grass following real and simulated feeding by snow geese
Jerry W. Hupp, Donna G. Robertson, Joel A. Schmutz
2000, Ecography (23) 367-373
Lesser snow geese Anser caerulescens caeruteseens from the western Canadian Arctic feed on underground parts of tall cotton–grass Eriophorum angustifolium during autumn staging on the coastal plain of the Beaufort Sea in Canada and Alaska. We studied revegetation of sites where cotton–grass had been removed either by human–imprinted snow geese or by hand to...
Monitoring hydrilla using two RAPD procedures and the nonindigenous aquatic species database
Paul T. Madeira, C.C. Jacono, Thai K. Van
2000, Journal of Aquatic Plant Management (38) 33-40
Hydrilla (Hydrilla verticillata (L.f.) Royle), an invasive aquatic weed, continues to spread to new regions in the United States. Two biotypes, one a female dioecious and the other monoecious have been identified. Management of the spread of hydrilla requires understanding the mechanisms of introduction and transport, an ability to map...
Tritium/3He measurements in young groundwater: Progress in applications to complex hydrogeological systems
Peter Schlosser, Stephanie D. Shapiro, Martin Stute, Niel Plummer
2000, Conference Paper, IAHS-AISH Publication
Tritium/3He dating has been applied to many problems in groundwater hydrology including, for example, determination of circulation patterns, mean residence times, recharge rates, or bank infiltration. Here, we discuss recent progress in the application of the tritium/3He dating method to sites with complex hydrogeological settings. Specifically, we report on tritium/3He...
Application of organic geochemistry to coastal tar residues from central California
K.A. Kvenvolden, R.J. Rosenbauer, F. D. Hostettler, T.D. Lorenson
2000, International Geology Review (42) 1-14
Tar residues are common on the coastline of the Monterey Bay National Marine Sanctuary. These coastal tar residues have been washed ashore and usually occur on headlands near the high-tide line. In this study, 18 coastal tar residues were collected and analyzed to determine their carbon isotopic compositions and the...
Natural and anthropogenic influences on the distribution of the threatened Neosho madtom in a midwestern warmwater stream
M. L. Wildhaber, A.L. Allert, C. J. Schmitt, V.M. Tabor, D. Mulhern, K.L. Powell, S.P. Sowa
2000, Transactions of the American Fisheries Society (129) 243-261
We attempted to discern the contributions of physical habitat, water chemistry, nutrients, and contaminants from historic lead–zinc mining activities on the riffle‐dwelling benthic fish community of the Spring River, a midwestern warmwater stream that originates in Missouri and flows into Kansas and Oklahoma. The Spring River has a fish community...
Sediment-contact and survival of fingernail clams: Implications for conducting short-term laboratory tests
T.J. Naimo, W.G. Cope, M.R. Bartsch
2000, Environmental Toxicology (15) 23-27
Porewater toxicity tests have been used as indicators of whole sediment toxicity. However, many species commonly tested in porewater predominately reside in the water column and otherwise have little to no direct contact with sediment and associated porewater. We assessed the feasibility of porewater toxicity tests with fingernail clams Musculium...
Climate change: Potential impacts and interactions in wetlands of the United States
Virginia Burkett, Jon Kusler
2000, Journal of the American Water Resources Association (36) 313-320
Wetlands exist in a transition zone between aquatic and terrestrial environments which can be altered by subtle changes in hydrology. Twentieth century climate records show that the United States is generally experiencing a trend towards a wetter, warmer climate; some climate models suggest that his trend will continue and possibly...
Mechanism and rate of denitrification in an agricultural watershed: Electron and mass balance along groundwater flow paths
Anthony J. Tesoriero, Hugh Liebscher, Stephen E. Cox
2000, Water Resources Research (36) 1545-1559
The rate and mechanism of nitrate removal along and between groundwater flow paths were investigated using a series of well nests screened in an unconfined sand and gravel aquifer. Intensive agricultural activity in this area has resulted in nitrate concentrations in groundwater often exceeding drinking water standards. Both the extent...
Evidence for a previously unrecognized species of owlet-nightjar
T.K. Pratt
2000, The Auk (117) 1-11
I studied the systematic relationships of the three large owlet-nightjars (Aegothelidae) to determine the taxonomic status of a fawn-colored lowland form currently classified as Aegotheles insignis tatei. I examined most of the existing specimens of A. i. insignis (n = 158) and A. crinifrons (n = 23) and all known...
Quantifying solar spectral irradiance in aquatic habitats for the assessment of photoenhanced toxicity
M.G. Barron, E. E. Little, R. Calfee, S. Diamond
2000, Environmental Toxicology and Chemistry (19) 920-925
The spectra and intensity of solar radiation (solar spectral irradiance [SSI]) was quantified in selected aquatic habitats in the vicinity of an oil field on the California coast. Solar spectral irradiance measurements consisted of spectral scans (280–700 nm) and radiometric measurements of ultraviolet (UV): UVB (280–320 nm) and UVA (320–400...
Comparing strengths of geographic and nongeographic classifications of stream benthic macroinvertebrates in the Mid-Atlantic Highlands, USA
I.R. Waite, A.T. Herlihy, D. P. Larsen, D.J. Klemm
2000, Journal of the North American Benthological Society (19) 429-441
The US Environmental Protection Agency’s (USEPA) Environmental Monitoring and Assessment Program (EMAP) sampled ∼500 wadeable streams in the Mid-Atlantic Highlands region of the US during the late spring of 1993 to 1995 for a variety of physical, chemical, and biological indicators of environmental condition. Eighty-eight sites that were minimally affected...
Effects of fall-to-winter changes in habitat and frazil ice on the movements and habitat use of juvenile rainbow trout in a Wyoming tailwater
Darin G. Simpkins, Wayne A. Hubert, Thomas A. Wesche
2000, Transactions of the American Fisheries Society (129) 101-118
Overwinter declines in the abundance of small rainbow trout Oncorhynchus mykiss have been observed in a section of the Big Horn River that lies downstream from Boysen Reservoir, where reservoir releases prevent surface ice formation. To provide insight into the possible causes of these declines in abundance, radiotelemetry was used to determine...
Multispectral image sharpening using wavelet transform techniques and spatial correlation of edges
George P. Lemeshewsky, Robert A. Schowengerdt
2000, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
Several reported image fusion or sharpening techniques are based on the discrete wavelet transform (DWT). The technique described here uses a pixel-based maximum selection rule to combine respective transform coefficients of lower spatial resolution near-infrared (NIR) and higher spatial resolution panchromatic (pan) imagery to produce a sharpened NIR image. Sharpening...
Gas content and composition of gas hydrate from sediments of the southeastern North American continental margin
T.D. Lorenson, T. S. Collett
2000, Conference Paper, Proceedings of the Ocean Drilling Program: Scientific Results
Gas hydrate samples were recovered from four sites (Sites 994, 995, 996, and 997) along the crest of the Blake Ridge during Ocean Drilling Program (ODP) Leg 164. At Site 996, an area of active gas venting, pockmarks, and chemosynthetic communities, vein-like gas hydrate was recovered from less than 1...
Comment on 'Volume of magma accumulation or withdrawal estimated from surface uplift or subsidence, with application to the 1960 collapse of Kilauea volcano' by P.T. Delaney and D.F. McTigue
Daniel J. Johnson, F. Sigmundsson, P.T. Delaney
2000, Bulletin of Volcanology (61) 491-493
In volcanoes that store a significant quantity of magma within a subsurface summit reservoir, such as Kilauea, bulk compression of stored magma is an important mode of deformation. Accumulation of magma is also accompanied by crustal deformation, usually manifested at the surface as uplift. These two modes of deformation -...
Paleoclimate reconstruction along the Pole-Equator-Pole transect of the Americas (PEP 1)
Vera Markgraf, T.R. Baumgartner, J.P. Bradbury, Henry F. Diaz, R. B. Dunbar, B.H. Luckman, G.O. Seltzer, T.W. Swetnam, R. Villalba
2000, Conference Paper, Quaternary Science Reviews
Examples are presented of inter-hemispheric comparison of instrumental climate and paleoclimate proxy records from the Americas for different temporal scales. Despite a certain symmetry of seasonal precipitation patterns along the PEP I transect, decadal variability of winter precipitation shows different characteristics in terms of amplitude and frequency in both the...
Metals and trace elements in tissues of common eiders (Somateria mollissima) from the Finnish archipelago
J. C. Franson, T. Hollmen, R.H. Poppenga, Martti Hario, Mikaei Kilpi
2000, Ornis Fennica (77) 57-63
We sampled Common Eiders (Somateria mollissima) at five locations near coastal Finland in 1997 and 1998 for evidence of exposure to arsenic, cadmium, chromium, copper, iron, mercury, magnesium, molybdenum, lead, selenium, and zinc. Livers and kidneys were collected from adult males and females found dead and hunter-killed males, and livers...
The bats of Wyoming
Michael A. Bogan, Paul M. Cryan
Jerry R. Choate, editor(s)
2000, Book chapter, Reflections of a naturalist: papers honoring Professor Eugene D. Fleharty
We examined 1280 bats of 12 species submitted to the Wyoming State Veterinary Laboratory (WSVL) for rabies testing between 1981 and 1992. The most abundant species in the sample was Myotis lucifugus, followed by Eptesicus fuscus, Lasionycteris noetivagans, M. ciliolabrum, and M. volans. Using the WSVL sample and additional museum...
Efficacy of a type C botulism vaccine in green-winged teal
Tonie E. Rocke, M.D. Samuel, P. K. Swift, G.S. Yarris
2000, Journal of Wildlife Diseases (36) 489-493
We tested the efficacy of a single dose of Botumink toxoid for protecting wild green-winged teal (Anas crecca) during botulism epizootics caused by Clostridium botulinum type C. We challenged control and immunized ducks with four different doses of type C botulinum toxin to determine the LD50 for this species and...
Economics show CO2 EOR potential in central Kansas
M.K. Dubois, A.P. Byrnes, R.E. Pancake, G.P. Willhite, L.G. Schoeling
2000, Oil & Gas Journal (98) 37-40
Carbon dioxide (CO2) enhanced oil recovery (EOR) may be the key to recovering hundreds of millions of bbl of trapped oil from the mature fields in central Kansas. Preliminary economic analysis indicates that CO2 EOR should provide an internal rate of return (IRR) greater than 20%, before income tax, assuming...
Simulations of flooding on Tchoutacabouffa River at State Highways 15 and 67 at D'Iberville, Mississippi
Karl E. Winters
2000, Water-Resources Investigations Report 2001-4007
A two-dimensional finite-element surface-water model was used to simulate the effects of the proposed State Highways 15 and 67 relocation on water-surface elevations and flow distributions for the 100-year flood on the Tchoutacabouffa River at D'Iberville, Mississippi. The Mississippi Department of Transportation plans to relocate State Highways 15 and 67...
Kelp forest fish populations in marine reserves and adjacent exploited areas of central California
M.J. Paddack, J. A. Estes
2000, Ecological Applications (10) 855-870
Population structure (density and size distribution) of 10 species of epibenthic kelp forest fishes was compared between three marine reserves and adjacent exploited areas in central California. We also contrasted substrate relief, algal turf cover, and kelp population density among these areas. Densities of fishes were 12–35% greater within the...
