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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Extending a prototype knowledge and object based image analysis model to coarser spatial resolution imagery: An example from the Missouri River
A prototype knowledge- and object-based image analysis model was developed to inventory and map least tern and piping plover habitat on the Missouri River, USA. The model has been used to inventory the state of sandbars annually for 4 segments of the Missouri River since 2006 using QuickBird imagery. Interpretation of the state of sandbars is difficult when images for the segment are acquired at d
Authors
Laurence L. Strong
Spectroscopic remote sensing for material identification, vegetation characterization, and mapping
Identifying materials by measuring and analyzing their reflectance spectra has been an important procedure in analytical chemistry for decades. Airborne and space-based imaging spectrometers allow materials to be mapped across the landscape. With many existing airborne sensors and new satellite-borne sensors planned for the future, robust methods are needed to fully exploit the information content
Authors
Raymond F. Kokaly
Examining wildlife responses to phenology and wildfire using a landscape-scale camera trap network
Between 2001 and 2009, the Borderlands Jaguar Detection Project deployed 174 camera traps in the mountains of southern Arizona to record jaguar activity. In addition to jaguars, the motion-activated cameras, placed along known wildlife travel routes, recorded occurrences of ~ 20 other animal species. We examined temporal relationships of white-tailed deer (Odocoileus virginianus) and javelina (Pec
Authors
Miguel L. Villarreal, Leila Gass, Laura Norman, Joel B. Sankeya, Cynthia S.A. Wallace, Dennis McMacken, Jack L. Childs, Roy E. Petrakis
Landsat Data Continuity Mission (LDCM) space to ground mission data architecture
The Landsat Data Continuity Mission (LDCM) is a scientific endeavor to extend the longest continuous multi-spectral imaging record of Earth's land surface. The observatory consists of a spacecraft bus integrated with two imaging instruments; the Operational Land Imager (OLI), built by Ball Aerospace & Technologies Corporation in Boulder, Colorado, and the Thermal Infrared Sensor (TIRS), an in-hous
Authors
Jack L. Nelson, J.A. Ames, J. Williams, R. Patschke, C. Mott, J. Joseph, H. Garon, G. Mah
Integrated geophysical surveys for mapping lati-andesite intrusive bodies, Chino Valley, Arizona
Three different geophysical methods (magnetic, transient electromagnetic (TEM) and gravity) were used near Chino Valley, Arizona, USA in order to map a suspected lati-andesite intrusive body (plug) previously located by interpretation of aeromagnetic data. The magnetic and TEM surveys provided the best indication of the location and depth of the plug. The north-south spatial extent of this plug wa
Authors
Hesham El-Kaliouby, Ben K. Sternberg, John P. Hoffmann, V. E. Langenheim
Will a changing climate increase interaction between rare and non-native plant species in Alaska?
No abstract available.
Authors
Lindsey Flagstad, Matthew L. Carlson, Helen Cortes-Burnes, Catherine Jarnevich, Tracy Holcombe
Comparative risk assessment of the first-generation anticoagulant rodenticide diphacinone to raptors
New regulatory restrictions have been placed on the use of some second-generation anticoagulant rodenticides in the United States, and in some situations this action may be offset by expanded use of first-generation compounds. We have recently conducted several studies with captive adult American kestrels and eastern screech-owls examining the toxicity of diphacinone (DPN) using both acute oral an
Authors
Barnett A. Rattner, Rebecca S. Lazarus, Karen M. Eisenreich, Katherine E. Horak, Steven F. Volker, Christopher M. Campton, John D. Eisemann, Carol U. Meteyer, John J. Johnson
Using micro-seismicity and seismic velocities to map subsurface geologic and hydrologic structure within the Coso geothermal field, California
Geothermal reservoirs derive their capacity for fluid and heat transport in large part from faults and fractures. Micro-seismicity generated on such faults and fractures can be used to map larger fault structures as well as secondary fractures that add access to hot rock, fluid storage and recharge capacity necessary to have a sustainable geothermal resource. Additionally, inversion of seismic vel
Authors
Joern Ole Kaven, Stephen H. Hickman, Nicholas C. Davatzes
Integrated science and interdisciplinary research for parks and protected areas
This paper summarizes presentations and discussion that focused on integrated science
and the use of interdisciplinary research during a panel session held at the George Wright Society
Meeting in New Orleans, March 14, 2011. The panel brought together nationally recognized
members from the social and biological scientific communities, along with decision-makers and
managers of parks and protected
Authors
Charles van Riper, Robert Powell, Jan W. van Wagtendonk, Gary Machlis, Russell Galipeau, Carena J. van Riper, Eick von Ruschkowski
Emergent wetlands status and trends in the northern Gulf of Mexico: 1950-2010
Poster presented during the Mississippi-Alabama Sea Grant Consortium Bays and Bayous Symposium 2012 on the decline of emergent wetlands in the northern Gulf of Mexico. Throughout the past century, emergent wetlands have been declining across the Gulf of Mexico. Emergent wetland ecosystems provide many resources, including plant and wildlife habitat, commercial and recreational economic activity, w
Impact assessment of extreme storm events using a Bayesian network
This paper describes an investigation on the usefulness of Bayesian Networks in the safety assessment of dune coasts. A network has been created that predicts the erosion volume based on hydraulic boundary conditions and a number of cross-shore profile indicators. Field measurement data along a large part of the Dutch coast has been used to train the network. Corresponding storm impact on the dune
Authors
C.(Kees) den Heijer, Dirk T.J.A. Knipping, Nathaniel G. Plant, Jaap S. M. van Thiel de Vries, Fedor Baart, Pieter H. A. J. M. van Gelder
An unusual molluscan faunule from the upper part of the Monterey Formation (middle to late Miocene) in Arroyo Seco, Monterey County, central California
No abstract available.
Authors
Charles L. Powell