Radiocarbon dates from volcanic deposits of the Chaos Craigs and Cinder Cone eruptive sequences and other deposits, Lassen Volcanic National Park and vicinity, California
Michael A. Clynne, Robert L. Christiansen, Deborah A. Trimble, John P. McGeehin
2008, Open-File Report 2002-290
This contribution reports radiocarbon ages obtained from charcoal, wood and other samples collected between 1979 and 2001 in Lassen Volcanic National Park and vicinity and a few samples from other nearby localities. Most of the samples are from the Chaos Crags and Cinder Cone eruptive sequences. Brief summaries are given...
Seagrass status and trends in the northern Gulf of Mexico: 1940-2002
D. Altsman, R. DeMay
L. Handley, editor(s)
2007, Scientific Investigations Report 2006-5287
Over the past century, seagrass habitats from the bays of Texas to the gulf shores of Florida have decreased. Seagrass beds, which are highly dependent on water quality and clarity for survival, are home to a multitude of aquatic plants and animals and a source of economic activity through commercial...
A Quantitative Threats Analysis for the Florida Manatee (Trichechus manatus latirostris)
Michael C. Runge, Carol A. Sanders-Reed, Catherine A. Langtimm, Christopher J. Fonnesbeck
2007, Open-File Report 2007-1086
The Florida manatee (Trichechus manatus latirostris) is an endangered marine mammal endemic to the southeastern United States. The primary threats to manatee populations are collisions with watercraft and the potential loss of warm-water refuges. For the purposes of listing, recovery, and regulation under the Endangered Species Act (ESA), an understanding...
A core stochastic population projection model for Florida manatees (Trichechus manatus latirostris)
Michael C. Runge, Carol A. Sanders-Reed, Christopher J. Fonnesbeck
2007, Open-File Report 2007-1082
A stochastic, stage-based population model was developed to describe the life history and forecast the population dynamics of the Florida manatee (Trichechus manatus latirostris) in four separate regions of Florida. This population model includes annual variability in survival and reproductive rates, demographic stochasticity, effects of changes in warm-water capacity, and...
Restoration technology branch
Water Resources Division, U.S. Geological Survey
2007, Report
The mission of Leetown Science Center (LSC), Restoration Technology Branch (RTB) is to conduct research needed to restore or protect the chemical, physical and biological integrity of desirable aquatic systems....
Landscape ecology
Water Resources Division, U.S. Geological Survey
2007, Report
Over the next few years, the Leetown Science Center (LSC) would like to establish an expanded capability for conducting landscape ecology research....
U.S. Geological Survey Activities Related to American Indians and Alaska Natives: Fiscal Year 2005
Susan M. Marcus
2007, Circular 1313
Introduction This report describes the activities that the U.S. Geological Survey (USGS) conducted with American Indian and Alaska Native governments, educational institutions, and individuals during Federal fiscal year (FY) 2005. Most of these USGS activities were collaborations with Tribes, Tribal organizations, or professional societies. Others were conducted cooperatively with the Bureau...
Vulnerability of National Park Service beaches to inundation during a direct hurricane landfall: Cumberland Island National Seashore
Hilary F. Stockdon, David M. Thompson, Laura A. Fauver
2007, Open-File Report 2007-1387
Cumberland Island National Seashore, a barrier-island coastal park in Georgia, is vulnerable to the powerful, sand-moving forces of hurricanes. Waves and storm surge associated with these strong tropical storms are part of the natural process of barrier-island evolution and can cause extensive morphologic changes in coastal parks, leading to reduced...
Vulnerability of National Park Service beaches to inundation during a direct hurricane landfall: Cape Lookout National Seashore
Hilary F. Stockdon, David M. Thompson
2007, Open-File Report 2007-1376
Cape Lookout National Seashore, a barrier-island coastal park in North Carolina, is vulnerable to the powerful, sand-moving forces of hurricanes. Waves and storm surge associated with these strong tropical storms are part of a natural process in barrier-island evolution and can cause extensive morphologic changes in coastal parks, leading to...
Coastal change-potential assessment of Sleeping Bear Dunes, Indiana Dunes, and Apostle Islands National Lakeshores to lake-level changes
Elizabeth A. Pendleton, E. Robert Thieler, S. Jeffress Williams
2007, Open-File Report 2005-1249
A change-potential index (CPI) was used to map the susceptibility of the shoreline to future lake-level change within Apostle Islands, Indiana Dunes, and Sleeping Bear Dunes National Lakeshores (NL) along Lake Superior and Lake Michigan. The CPI in the Great Lakes setting ranks the following in terms of their physical...
Marking techniques
Daniel E. Varland, J.A. Smallwood, Leonard S. Young, Michael N. Kochert
2007, Book chapter, Raptor research and management techniques
No abstract available....
Diseases of amphibians
Christine L. Densmore, David E. Green
2007, ILAR Journal (48) 235-254
The development and refinement of amphibian medicine comprise an ongoing science that reflects the unique life history of these animals and our growing knowledge of amphibian diseases. Amphibians are notoriously fastidious in terms of captive care requirements, and the majority of diseases of amphibians maintained in captivity will relate directly...
Seismic-reflection images of the crust beneath the 2001 M = 7.7 Kutch (Bhuj) epicentral region, western India
Dipankar Sarkar, K. Sain, P.R. Reddy, Rufus D. Catchings, Walter D. Mooney
2007, Geological Society of America Special Papers (425) 319-327
Three short (∼35 km) seismic-reflection profiles are presented from the region of the 2001 Mw = 7.7 Bhuj (western India) earthquake. These profiles image a 35–45-km-thick crust with strong, near-horizontal reflections at all depths. The thickness of the crust increases by 10 km over a distance of...
Facing tomorrow’s challenges—U.S. Geological Survey science in the decade 2007–2017
Water Resources Division, U.S. Geological Survey
2007, Circular 1309
Executive SummaryIn order for the U.S. Geological Survey (USGS) to respond to evolving national and global priorities, it must periodically reflect on, and optimize, its strategic directions. This report is the first comprehensive science strategy since the early 1990s to examine critically major USGS science goals and priorities.The development of...
Chapter A7. Section 7.4. Algal biomass indicators
Julie A. Hambrook Berkman, M.G. Canova
2007, Techniques of Water-Resources Investigations 09-A7.4
Indicators of algal biomass are used to assess water quality in both moving (lotic) and stillwater (lentic) ecosystems. Algal biomass in a water body can be estimated in three ways: (1) by quantifying chlorophyll a (CHL a), (2) by measuring carbon biomass as ash-free dry mass (AFDM), or (3)...
Hydrology of tidal freshwater forested wetlands of the southeastern United States
Richard H. Day, Thomas M. Williams, Christopher M. Swarzenski
2007, Book chapter, Ecology of Tidal Freshwater Forested Wetlands of the Southeastern United States
No abstract available....
Landscape change and relative elevation sub-models
Gregory D. Steyer, Brady Couvillion, Hongqing Wang, William J. Sleavin, John M. Rybczyk, Nadine Trahan, Holly Beck, Craig J. Fischenich, Ronald G. Boustany, Yvonne C. Allen
2007, Report, Louisiana's comprehensive coastal protection master plan for a sustainable coast
No abstract available...
Improving the Homeland Security Advisory System: An experimental analysis of threat communication for homeland security
Philip T. Ganderton, R. L. Bernknopf
2007, Book chapter, The economic costs and consequences of terrorism
No abstract available....
United States‐Mexican border watershed assessment: Modeling nonpoint source pollution in Ambos Nogales
Laura M. Norman
2007, Journal of Borderlands Studies (22) 79-97
Ecological considerations need to be interwoven with economic policy and planning along the United States‐Mexican border. Non‐point source pollution can have significant implications for the availability of potable water and the continued health of borderland ecosystems in arid lands. However, environmental assessments in this region present a host of unique...
Multicriteria decision analysis: Overview and implications for environmental decision making
Caroline M. Hermans, Jon D. Erickson
Jon D. Erickson, Frank Messner, Irene Ring, editor(s)
2007, Book chapter, Advances in the Economics of Environmental Resources
Environmental decision making involving multiple stakeholders can benefit from the use of a formal process to structure stakeholder interactions, leading to more successful outcomes than traditional discursive decision processes. There are many tools available to handle complex decision making. Here we illustrate the use of a multicriteria decision analysis (MCDA)...
Ground-water conditions in Utah, spring of 2007
Carole B. Burden, David V. Allen, M.R. Danner, Michael Enright, J.L. Cillessen, S.J. Gerner, Robert J. Eacret, Paul Downhour, Bradley A. Slaugh, Robert L. Swenson, James H. Howells, Howard K. Christiansen, Martel J. Fisher
2007, Cooperative Investigations Report 48
This is the forty-fourth in a series of annual reports that describe ground-water conditions in Utah. Reports in this series, published cooperatively by the U.S. Geological Survey and the Utah Department of Natural Resources, Division of Water Resources and Division of Water Rights, and the Utah Department of Environmental Quality,...
Mystery solved: White deposit on streambeds proves to be diatoms
Rick Webb, Karen C. Rice
2007, Shenandoah National Park Resource Management Newsletter (Spring 2007)
In the late winter and early spring of 2006 an unusual white deposit was observed on rocks and margins of streambeds in a number of park streams. Inquiries were made to park staff and scientists studying water resources in the park as to what the deposit was and did it...
Electrical activity during the 2006 Mount St. Augustine volcanic eruptions
Ronald J. Thomas, Paul R. Krehbiel, William Rison, H. E. Edens, G. D. Aulich, S.R. McNutt, Guy Tytgat, E. Clark
2007, Science (315) 1097-1097
By using a combination of radio frequency time-of-arrival and interferometer measurements, we observed a sequence of lightning and electrical activity during one of Mount St. Augustine's eruptions. The observations indicate that the electrical activity had two modes or phases. First, there was an explosive phase in which the ejecta from...
Discussion of The mantle plume debate in undergraduate geoscience education: Overview, history, and recommendations
Robert I. Tilling
2007, Book chapter, Planets, Plumes, and Planetary Processes
Volcanic ash plume identification using polarization lidar: Augustine eruption, Alaska
Kenneth Sassen, Jiang Zhu, Peter W. Webley, K. Dean, Patrick Cobb
2007, Geophysical Research Letters (34)
During mid January to early February 2006, a series of explosive eruptions occurred at the Augustine volcanic island off the southern coast of Alaska. By early February a plume of volcanic ash was transported northward into the interior of Alaska. Satellite imagery and Puff volcanic ash transport model predictions confirm...
