Conference Papers
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
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USGS research on three mid-latitude glaciers
Low- and mid-latitude regions of the earth are home to 80 to 90 percent of the world's population. Because of this, the U.S. Geological Survey (USGS) is conducting a research program to study the geochemistry of precipitation, snow, ice, and runoff samples from mid-latitude glaciers in Kyrghyzstan, Nepal, and the United States, Areas of research, such as ground-water studies, reconstructing paleoc
Authors
J.R. Green, L. DeWayne Cecil, D. L. Naftz, P. F. Schuster
USGS World Petroleum Assessment 2000: New Conventional Provinces
The USGS has completed a new assessment of the undiscovered oil and gas resources of the world. One hundred and five geologic provinces were analyzed for assessment. Assessment units (AU) that comprise Total Petroleum Systems (TPS) were identified and described for each of these provinces. The AU served as the basis for assessing undiscovered petroleum within these provinces, 157 TPS and 270 AU we
Authors
Thomas S. Ahlbrandt, T. R. Klett
Using GIS and GPS to map seasonal distribution and relative density of Independence Valley speckled dace and Independence Valley tui chub
No abstract available
Authors
P.H. Rissler, G.G. Scoppettone, S. Shea, S. Byers
Wildlife in a chemical world
Snapping turtles were collected by the Ohio State EPA from six locations in Ohio believed to have different contaminant concentrations. Previously we reported significant correlations among four hepatic microsomal dealkylases and CYP1A in these turtles. Herein we compare ethoxyresorufin-O-dealkylase (EROD) and methoxyROD (MROD) to tissue contaminant concentrations. For Fifty-four of these turtl
Authors
M. J. Melancon, J.S. Russell, J.F. Estenik, S.W. Fisher, H. Dabrowska
Wildlife tradeoffs based on landscape models of habitat
It is becoming increasingly clear that the spatial structure of landscapes affects the habitat choices and abundance of wildlife. In contrast to wildlife management based on preservation of critical habitat features such as nest sites on a beach or mast trees, it has not been obvious how to incorporate spatial structure into management plans. We present techniques to accomplish this goal. We used
Authors
C. Loehle, M.S. Mitchell
Wildlife tradeoffs based on landscape models of habitat preference
Wildlife tradeoffs based on landscape models of habitat preference were presented. Multiscale logistic regression models were used and based on these models a spatial optimization technique was utilized to generate optimal maps. The tradeoffs were analyzed by gradually increasing the weighting on a single species in the objective function over a series of simulations. Results indicated that effici
Authors
C. Loehle, M.S. Mitchell, M. White
Pattern and process of land loss in the Mississippi Delta: A spatial and temporal analysis of wetland habitat change
An earlier investigation (Turner 1997) concluded that most of the coastal wetland loss in Louisiana was caused by the effects of canal dredging, that loss was near zero in the absence of canals, and that land loss had decreased to near zero by the late 1990s. This analysis was based on a 15-min quadrangle (approximately 68,000 ha) scale that is too large to isolate processes responsible for small-
Authors
John W. Day, Gary P. Shaffer, Louis D. Britsch, Denise J. Reed, Suzanne Hawes, Donald R. Cahoon
Impacts of hazards and disasters on coastal ecosystems: The hidden costs to society
No abstract available.
Authors
James W. Good, Virginia Burkett
Sedimentation, consolidation and surface elevation change in two salt marshes of the Mississippi River Deltaic Plan: Geotechnical aspects of wetland loss
No abstract available
Authors
G. Paul Kemp, J.W. Day, Denise J. Reed, Donald R. Cahoon, Menglou Wang
Whole system material fluxes within meadows of Vallisneria americana from Lake Pontchartrain, LA: Effects of light and nutrient manipulations
No abstract available
Authors
Ronald G. Boustany, William M. Rizzo
Salt marsh plant colonization, growth, and dominance on large mudflats created using dredged sediments
No abstract available
Authors
C. Edward Proffitt, Jennifer Young
Pattern and process of land loss in the Louisiana coastal zone: An analysis of spatial and temporal patterns of wetland habitat change
No abstract available.
Authors
John W. Jr. Day, Gary P. Shaffer, Louis D. Britsch, Denise J. Reed, Suzanne Hawes, Donald R. Cahoon