Population dynamics of zebra mussels Dreissena polymorpha (Pallas, 1771) during the initial invasion of the Upper Mississippi River, USA
W.G. Cope, M.R. Bartsch, J.E. Hightower
2006, Journal of Molluscan Studies (72) 179-188
The aim of this study was to document and model the population dynamics of zebra mussels Dreissena polymorpha (Pallas, 1771) in Pool 8 of the Upper Mississippi River (UMR), USA, for five consecutive years (1992-1996) following their initial discovery in September 1991. Artificial substrates (concrete blocks, 0.49 m2 surface area)...
Neural network prediction of carbonate lithofacies from well logs, Big Bow and Sand Arroyo Creek fields, Southwest Kansas
L. Qi, T.R. Carr
2006, Computers & Geosciences (32) 947-964
In the Hugoton Embayment of southwestern Kansas, St. Louis Limestone reservoirs have relatively low recovery efficiencies, attributed to the heterogeneous nature of the oolitic deposits. This study establishes quantitative relationships between digital well logs and core description data, and applies these relationships in a probabilistic sense to predict lithofacies in...
Predicting minimum habitat characteristics for the Indiana bat in the Champlain Valley
K.S. Watrous, T.M. Donovan, R.M. Mickey, S.R. Darling, A.C. Hicks, S. L. Von Oettingen
2006, Journal of Wildlife Management (70) 1228-1237
Predicting potential habitat across a landscape for rare species is extremely challenging. However, partitioned Mahalanobis D2 methods avoid pitfalls commonly encountered when surveying rare species by using data collected only at known species locations. Minimum habitat requirements are then determined by examining a principal components analysis to find consistent habitat...
Surface waves in the western Taiwan coastal plain from an aftershock of the 1999 Chi-Chi, Taiwan, earthquake
G.-Q. Wang, G.-Q. Tang, D.M. Boore, Burbach G. Van Ness G., C.R. Jackson, X.-Y. Zhou, Q.-L. Lin
2006, Bulletin of the Seismological Society of America (96) 821-845
Significant surface waves were recorded in the western coastal plain (WCP) of Taiwan during the 1999 Chi-Chi, Taiwan, earthquake and its series of aftershocks. We study in detail the surface waves produced by one aftershock (20 September 1999, 18hr 03m 41.16sec, M 6.2) in this paper. We take the Chelungpu-Chukou...
Evolution of fracture and fault-controlled fluid pathways in carbonates of the Albanides fold-thrust belt
Wall B.R. Graham, R. Girbacea, A. Mesonjesi, A. Aydin
2006, American Association of Petroleum Geologists Bulletin (90) 1227-1249
The process of fracture and fault formation in carbonates of the Albanides fold-thrust belt has been systematically documented using hierarchical development of structural elements from hand sample, outcrop, and geologic-map scales. The function of fractures and faults in fluid migration was elucidated using calcite cement and bitumen in these structures...
Numerical modeling of magnetic moments for UXO applications
V. Sanchez, Y. Li, M. Nabighian, D. Wright
2006, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
The surface magnetic anomaly observed in UXO clearance is mainly dipolar and, consequently, the dipole is the only magnetic moment regularly recovered in UXO applications. The dipole moment contains information about intensity of magnetization but lacks information about shape. In contrast, higher-order moments, such as quadrupole and octupole, encode asymmetry...
Age model for a continuous, ca 250-ka Quaternary lacustrine record from Bear Lake, Utah-Idaho
Steven M. Colman, D. S. Kaufman, Jordon Bright, C. Heil, J.W. King, W.E. Dean, J. G. Rosenbaum, R. M. Forester, J. L. Bischoff, Marie Perkins, J. P. McGeehin
2006, Quaternary Science Reviews (25) 2271-2282
The Quaternary sediments sampled by continuous 120-m-long drill cores from Bear Lake (Utah-Idaho) comprise one of the longest lacustrine sequences recovered from an extant lake. The cores serve as a good case study for the construction of an age model for sequences that extend beyond the range of radiocarbon dating....
Shallow stratigraphy and sedimentation history during high-frequency sea-level changes on the central California shelf
E. E. Grossman, S.L. Eittreim, M.E. Field, F. L. Wong
2006, Continental Shelf Research (26) 1217-1239
Analyses of high-resolution seismic-reflection data and sediment cores indicate that an extensive sediment deposit on the central California continental shelf is comprised of several late-Pleistocene to Holocene age facies. Offshore of the littoral zone, in water depths of 30-90 m, a 3-6 m thick veneer of fine sediment referred to...
Remote sensing for grassland management in the arid Southwest
R.C. Marsett, J. Qi, P. Heilman, S.H. Biedenbender, M.C. Watson, S. Amer, M. Weltz, D. Goodrich, R. Marsett
2006, Rangeland Ecology and Management (59) 530-540
We surveyed a group of rangeland managers in the Southwest about vegetation monitoring needs on grassland. Based on their responses, the objective of the RANGES (Rangeland Analysis Utilizing Geospatial Information Science) project was defined to be the accurate conversion of remotely sensed data (satellite imagery) to quantitative estimates of total...
Satellite-derived, melt-season surface temperature of the Greenland Ice Sheet (2000-2005) and its relationship to mass balance
D.K. Hall, R.S. Williams Jr., K.A. Casey, N.E. DiGirolamo, Z. Wan
2006, Geophysical Research Letters (33)
Mean, clear-sky surface temperature of the Greenland Ice Sheet was measured for each melt season from 2000 to 2005 using Moderate-Resolution Imaging Spectroradiometer (MODIS)–derived land-surface temperature (LST) data-product maps. During the period of most-active melt, the mean, clear-sky surface temperature of the ice sheet was highest in 2002 (−8.29 ±...
Lake sturgeon population characteristics in Rainy Lake, Minnesota and Ontario
W.E. Adams Jr., L.W. Kallemeyn, D.W. Willis
2006, Journal of Applied Ichthyology (22) 97-102
Rainy Lake contains a native population of lake sturgeon Acipenser fulvescens that has been largely unstudied. The aims of this study were to document the population characteristics of lake sturgeon in Rainy Lake and to relate environmental factors to year-class strength for this population. Gill-netting efforts throughout the study resulted...
Energy density of lake whitefish Coregonus clupeaformis in Lakes Huron and Michigan
S.A. Pothoven, T.F. Nalepa, C.P. Madenjian, R.R. Rediske, P.J. Schneeberger, J.X. He
2006, Environmental Biology of Fishes (76) 151-158
We collected lake whitefish Coregonus clupeaformis off Alpena and Tawas City, Michigan, USA in Lake Huron and off Muskegon, Michigan USA in Lake Michigan during 2002–2004. We determined energy density and percent dry weight for lake whitefish from both lakes and lipid content for Lake Michigan fish. Energy density increased...
An effective medium inversion algorithm for gas hydrate quantification and its application to laboratory and borehole measurements of gas hydrate-bearing sediments
S. Chand, T.A. Minshull, J.A. Priest, A.I. Best, C.R.I. Clayton, W.F. Waite
2006, Geophysical Journal International (166) 543-552
The presence of gas hydrate in marine sediments alters their physical properties. In some circumstances, gas hydrate may cement sediment grains together and dramatically increase the seismic P- and S-wave velocities of the composite medium. Hydrate may also form a load-bearing structure within the sediment microstructure, but with different seismic...
Monitoring low density avian populations: An example using Mountain Plovers
V.J. Dreitz, P.M. Lukacs, F.L. Knopf
2006, Condor (108) 700-706
Declines in avian populations highlight a need for rigorous, broad-scale monitoring programs to document trends in avian populations that occur in low densities across expansive landscapes. Accounting for the spatial variation and variation in detection probability inherent to monitoring programs is thought to be effort-intensive and time-consuming. We determined the...
Importance of wetland landscape structure to shorebirds wintering in an agricultural valley
Oriane W. Taft, Susan M. Haig
2006, Landscape Ecology (21) 169-184
Only recently has the influence of landscape structure on habitat use been a research focus in wetland systems. During non-breeding periods when food can be locally limited, wetland spatial pattern across a landscape may be of great importance in determining wetland use. We studied the influence of landscape structure on...
Influence of habitat heterogeneity on distribution, occupancy patterns, and productivity of breeding peregrine falcons in central West Greenland
C.S. Wightman, M.R. Fuller
2006, Condor (108) 270-281
We used occupancy and productivity data collected at 67 cliffs used for nesting from 1972 to 1999 to assess patterns of distribution and nest-site selection in an increasing population of Peregrine Falcons (Falco peregrinus) in central West Greenland. Peregrine Falcons breeding at traditionally occupied cliffs used for nesting had significantly...
Extending electromagnetic methods to map coastal pore water salinities
J. Greenwood, S. Kruse, P. Swarzenski
2006, Ground Water (44) 292-299
The feasibility of mapping pore water salinity based on surface electromagnetic (EM) methods over land and shallow marine water is examined in a coastal wetland on Tampa Bay, Florida. Forward models predict that useful information on seabed conductivity can be obtained through <1.5 m of saline water, using floating EM-31...
Estimating crustal heterogeneity from double-difference tomography
J.-L. Got, V. Monteiller, J. Virieux, P. Okubo
2006, Pure and Applied Geophysics (163) 405-430
Seismic velocity parameters in limited, but heterogeneous volumes can be inferred using a double-difference tomographic algorithm, but to obtain meaningful results accuracy must be maintained at every step of the computation. MONTEILLER et al. (2005) have devised a double-difference tomographic algorithm that takes full advantage of the accuracy of cross-spectral...
Predicting water-surface fluctuation of continental lakes: A RS and GIS based approach in Central Mexico
M.E. Mendoza, G. Bocco, M. Bravo, Granados E. Lopez, W. R. Osterkamp
2006, Water Resources Management (20) 291-311
Changes in the water-surface area occupied by the Cuitzeo Lake, Mexico, during the 1974-2001 period are analysed in this study. The research is based on remote sensing and geographic information techniques, as well as statistical analysis. High-resolution satellite image data were used to analyse the 1974-2000 period, and very low-resolution...
Uranyl adsorption and surface speciation at the imogolite-water interface: Self-consistent spectroscopic and surface complexation models
Y. Arai, M. McBeath, J.R. Bargar, J. Joye, J.A. Davis
2006, Geochimica et Cosmochimica Acta (70) 2492-2509
Macro- and molecular-scale knowledge of uranyl (U(VI)) partitioning reactions with soil/sediment mineral components is important in predicting U(VI) transport processes in the vadose zone and aquifers. In this study, U(VI) reactivity and surface speciation on a poorly crystalline aluminosilicate mineral, synthetic imogolite, were...
The effect of creosote on vitellogenin production in rainbow trout (Oncorhynchus mykiss)
J.P. Sherry, J.J. Whyte, N.A. Karrow, A. Gamble, H.J. Boerman, N.C. Bol, D.G. Dixon, K.R. Solomon
2006, Archives of Environmental Contamination and Toxicology (50) 65-68
As part of a broader investigation into the effects of creosote treatments on the aquatic biota in pond microcosms, we examined the possible implications for vitellogenin (Vtg) production in Oncorhynchus mykiss [rainbow trout (RT)]. Vtg is the precursor of egg yolk protein and has emerged as a useful biomarker of...
Interpreting the spatio-temporal patterns of sea turtle strandings: Going with the flow
K.M. Hart, P. Mooreside, L.B. Crowder
2006, Biological Conservation (129) 283-290
Knowledge of the spatial and temporal distribution of specific mortality sources is crucial for management of species that are vulnerable to human interactions. Beachcast carcasses represent an unknown fraction of at-sea mortalities. While a variety of physical (e.g., water temperature) and biological (e.g., decomposition) factors as well as the distribution...
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...
The role of environmental gradients in non-native plant invasion into burnt areas of Yosemite National Park, California
R. Klinger, E.C. Underwood, P.E. Moore
2006, Diversity and Distributions (12) 139-156
Fire is known to facilitate the invasion of many non-native plant species, but how invasion into burnt areas varies along environmental gradients is not well-understood. We used two pre-existing data sets to analyse patterns of invasion by non-native plant species into burnt areas along gradients of topography, soil and vegetation...
Holocene history of drift ice in the northern North Atlantic: Evidence for different spatial and temporal modes
M. Moros, John T. Andrews, D. D. Eberl, E. Jansen
2006, Paleoceanography (21)
We present new high-resolution proxy data for the Holocene history of drift ice off Iceland based on the mineralogy of the <2-mm sediment fraction using quantitative X-ray diffraction. These new data, bolstered by a comparison with published proxy records, point to a long-term increasing trend in drift ice input into...
