The MODIS reprojection tool
John L. Dwyer, Gail L. Schmidt
J.J. Qu, W. Gao, M. Kafatos, R.E. Murphy, V.V. Salomonson, editor(s)
2006, Book chapter, Earth science satellite remote sensing— Data, computational processing, and tools
The MODIS Reprojection Tool (MRT) is designed to help individuals work with MODIS Level-2G, Level-3, and Level-4 land data products. These products are referenced to a global tiling scheme in which each tile is approximately 10° latitude by 10° longitude and non-overlapping (Fig. 9.1). If desired, the user may reproject...
Effect of diet processing method and ingredient substitution on feed characteristics and survival of larval walleye, Sander vitreus
F.T. Barrows, W.A. Lellis
2006, Journal of the World Aquaculture Society (37) 154-160
Two methods were developed for the production of larval fish diets. The first method, microextrusion marumerization (MEM), has been tested in laboratory feeding trials for many years and produces particles that are palatable and water stable. The second method, particle-assisted rotational agglomeration (PARA), produced diets that have lower density than...
Terrestrial ice streams-a view from the lobe
C.E. Jennings
2006, Geomorphology (75) 100-124
The glacial landforms of Minnesota are interpreted as the products of the lobate extensions of ice streams that issued from various ice sheds within the Laurentide Ice Sheet. Low-relief till plains, trough-shaped lowlands, boulder pavements, and streamlined forms make up the subglacial landsystem in Minnesota that is interpreted as having...
Sorption processes affecting arsenic solubility in oxidized surface sediments from Tulare Lake Bed, California
S. Gao, S. Goldberg, M.J. Herbel, A.T. Chalmers, R. Fujii, K.K. Tanji
2006, Chemical Geology (228) 33-43
Elevated concentrations of arsenic (As) in shallow groundwater in Tulare Basin pose an environmental risk because of the carcinogenic properties of As and the potential for its migration to deep aquifers that could serve as a future drinking water source. Adsorption and desorption are hypothesized to be the major processes...
Exact three-dimensional spectral solution to surface-groundwater interactions with arbitrary surface topography
A. Worman, A.I. Packman, L. Marklund, J. W. Harvey, S.H. Stone
2006, Geophysical Research Letters (33)
It has been long known that land surface topography governs both groundwater flow patterns at the regional‐to‐continental scale and on smaller scales such as in the hyporheic zone of streams. Here we show that the surface topography can be separated in a Fourier‐series...
Sample size and the detection of a hump-shaped relationship between biomass and species richness in Mediterranean wetlands
J. L. Espinar
2006, Journal of Vegetation Science (17) 227-232
Questions: What is the observed relationship between biomass and species richness across both spatial and temporal scales in communities of submerged annual macrophytes? Does the number of plots sampled affect detection of hump-shaped pattern? Location: Don??ana National Park, southwestern Spain. Methods: A total of 102 plots were sampled during four...
Palynology and age of some Cretaceous nonmarine deposits in Mongolia and China
D. J. Nichols, M. Matsukawa, M. Ito
2006, Cretaceous Research (27) 241-251
To provide biostratigraphic and paleoecologic data for a major international project studying dinosaur trackways in eastern Asia, samples were collected for palynological analysis from the Choyr Basin of southeastern Mongolia and the Yanji Basin, Jilin Province, northeastern China. Palynologically productive samples from the Choyr Basin are from strata previously identified...
Studies on stoneflies (Plecoptera) of Colorado with eastern faunal affinities, including a new state record of the midwestern salmonfly, Pteronarcys pictetii hagen (Plecoptera: Pteronarcyidae)
R.E. Zuellig, B.C. Kondratieff, R.W. Hood
2006, Proceedings of the Entomological Society of Washington (108) 335-340
Pteronarcys pictetii Hagen nymphs were collected and reared from the South Platte River at Julesburg in eastern Colorado. Including P. pictetii, eight species are now known from Colorado that exhibit eastern North American affinities, Paracapnia angulata Hanson, Taeniopteryx burksi Ricker and Ross, Taeniopteryx parvula Banks, Acroneuria abnormis (Newman), Perlesta decipiens...
Seasonal effects of the zebra mussel (Dreissena polymorpha) on sediment denitrification rates in Pool 8 of the Upper Mississippi River
Denise A. Bruesewitz, Jennifer L. Tank, Melody J. Bernot, William B. Richardson, Eric A. Strauss
2006, Canadian Journal of Fisheries and Aquatic Sciences (63) 957-969
Zebra mussels (Dreissena polymorpha) have altered the structure of invaded ecosystems and exhibit characteristics that suggest they may influence ecosystem processes such as nitrogen (N) cycling. We measured denitrification rates seasonally on sediments underlying zebra mussel beds collected from the impounded zone of Navigation Pool 8 of the Upper Mississippi...
Explicit use of the Biot coefficient in predicting shear-wave velocity of water-saturated sediments
Myung W. Lee
2006, Geophysical Prospecting (54) 177-185
Predicting the shear-wave (S-wave) velocity is important in seismic modelling, amplitude analysis with offset, and other exploration and engineering applications. Under the low-frequency approximation, the classical Biot-Gassmann theory relates the Biot coefficient to the bulk modulus of water-saturated sediments. If the Biot coefficient under in situ conditions can be estimated,...
Spatial and temporal dynamics of microcystin in a Missouri reservoir
J.L. Graham, J.R. Jones, S.B. Jones, T.E. Clevenger
2006, Lake and Reservoir Management (22) 59-68
Environmental factors associated with spatiotemporal variation of microcystin (MC) in Mozingo Lake, a Missouri reservoir, were studied during summer 2001, and annual MC trends were characterized from May 2001-May 2002. MC increased during summer, ranging from 20 to 1220 ng/L. Seasonal patterns in MC corresponded with chlorophyll>35 ??m (Net Chl)...
Petrography and geochemistry of the Middle Devonian coal from Luquan, Yunnan Province, China
S. Dai, D. Han, C. L. Chou
2006, Fuel (85) 456-464
Coals from Luquan, Yunnan Province, China, have high contents of cutinite and microsporinite, with an average of 55 and 33.5 vol%, respectively, (on a mineral-free basis). The coals are classified as cutinitic liptobiolith, sporinite-rich durain, cutinite-rich durain, and sporinitic liptobiolith. These four liptinite-rich coals are often interlayered within the coal...
Vascular flora of Izembek National Wildlife Refuge, westernmost Alaska Peninsula, Alaska
Stephen S. Talbot, Sandra Looman Talbot, Wilfred B. Schofield
2006, Rhodora (108) 249-293
The vascular flora of Izembek National Wildlife Refuge (NWR), where few previous collections had been reported, was collected and recorded at sites selected to represent the totality of environmental variation. A total of 349 species (339 native and 10 introduced) was identified. To provide a comparative phytogeographic framework, we analyzed...
Simulation of solute transport across low-permeability barrier walls
P. T. Harte, Leonard F. Konikow, G.Z. Hornberger
2006, Journal of Contaminant Hydrology (85) 247-270
Low-permeability, non-reactive barrier walls are often used to contain contaminants in an aquifer. Rates of solute transport through such barriers are typically many orders of magnitude slower than rates through the aquifer. Nevertheless, the success of remedial actions may be sensitive to these low rates of transport. Two numerical simulation...
Regional patterns in the isotopic composition of natural and anthropogenic nitrate in groundwater, High Plains, U.S.A.
P.B. McMahon, J.K. Böhlke
2006, Environmental Science & Technology (40) 2965-2970
Mobilization of natural nitrate (NO3-) deposits in the subsoil by irrigation water in arid and semiarid regions has the potential to produce large groundwater NO3- concentrations. The use of isotopes to distinguish between natural and anthropogenic NO3- sources in these settings could be complicated by the wide range in δ15N...
Estimating the abundance of prairie dogs
Dean E. Biggins, John G. Sidle, D.B. Seery, A. E. Ernst
2006, Book chapter, Conservation of the black-tailed prairie dog: saving North America's western grasslands
No abstract available....
Conservation of prairie dogs in areas with plague
J.F. Cully, Dean E. Biggins, D.B. Seery
2006, Book chapter, Conservation of the black-tailed prairie dog: saving North America's western grasslands
No abstract available....
Geographic variation in morphology, diet, and ectoparasites of Myotis occultus in New Mexico and southern Colorado
Ernest W. Valdez
2006, Thesis
No abstract available....
Demographic patterns of postfire regeneration in Mediterranean-climate shrublands of California
Jon E. Keeley, C. J. Fotheringham, M. Baer-Keeley
2006, Ecological Monographs (76) 235-255
This study uses detailed demographic data to determine the extent to which functional groupings, based on seedling recruitment and resprouting response to fire, capture the dynamics of postfire responses and early successional change in fire-prone ecosystems. Following massive wildfires in southern California, USA, we sampled chaparral and sage scrub vegetation...
Nature and characteristics of the flows that carved the Simud and Tiu outflow channels, Mars
J.A.P. Rodriguez, K. L. Tanaka, H. Miyamoto, S. Sasaki
2006, Geophysical Research Letters (33)
Geomorphic and topographic relations of higher and lower levels of dissection within the Simud and Tiu Valles outflow channels on Mars reveal new insights into their formational histories. We find that the water floods that carved the higher channel floors were primarily sourced from Hydaspis Chaos. The floods apparently branched...
Spatial organization of a reintroduced population of bobcats
Duane R. Diefenbach, L.A. Hansen, R.J. Warren, M.J. Conroy
2006, Journal of Mammalogy (87) 394-401
The spacing patterns and mating systems of solitary carnivores have important implications for social behavior and for the survival and reproduction of individuals. Over 2 years, we reintroduced 32 (15 males and 17 females) bobcats (Lynx rufus) to a barrier island off the coast of Georgia and studied patterns of...
New maps, new information: Coral reefs of the Florida keys
B. H. Lidz, C. D. Reich, R.L. Peterson, E.A. Shinn
2006, Journal of Coastal Research (22) 260-282
A highly detailed digitized map depicts 22 benthic habitats in 3140.5 km2 of the Florida Keys National Marine Sanctuary. Dominant are a seagrass/lime-mud zone (map area 27.5%) throughout Hawk Channel and seagrass/carbonate-sand (18.7%) and bare carbonate-sand (17.3%) zones on the outer shelf and in The Quicksands. A lime-mud/seagrass-covered muddy carbonate-sand...
Albatross species demonstrate regional differences in North Pacific marine contamination
M. Finkelstein, B.S. Keitt, D.A. Croll, B. Tershy, Walter M. Jarman, S. Rodriguez-Pastor, D.J. Anderson, P.R. Sievert, D. R. Smith
2006, Ecological Applications (16) 678-686
Recent concern about negative effects on human health from elevated organochlorine and mercury concentrations in marine foods has highlighted the need to understand temporal and spatial patterns of marine pollution. Seabirds, long-lived pelagic predators with wide foraging ranges, can be used as indicators of regional contaminant patterns across large temporal...
Multiple hypotheses testing of fish incidence patterns in an urbanized ecosystem
C.J. Chizinski, C.L. Higgins, C.E. Shavlik, K.L. Pope
2006, Aquatic Ecology (40) 97-109
Ecological and evolutionary theories have focused traditionally on natural processes with little attempt to incorporate anthropogenic influences despite the fact that humans are such an integral part of virtually all ecosystems. A series of alternate models that incorporated anthropogenic factors and traditional ecological mechanisms of invasion to account for fish...
Multiphase flow in geometrically simple fracture intersections
H. Basagaoglu, P. Meakin, C.T. Green, M. Mathew
Boghosian B.M., editor(s)
2006, Physica A: Statistical Mechanics and its Applications (362) 17-22
A two-dimensional lattice Boltzmann (LB) model with fluid-fluid and solid-fluid interaction potentials was used to study gravity-driven flow in geometrically simple fracture intersections. Simulated scenarios included fluid dripping from a fracture aperture, two-phase flow through intersecting fractures and thin-film flow on smooth and undulating solid surfaces. Qualitative comparisons with recently...
