Conference Papers
Science Quality and Integrity
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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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Survival and growth of bottomland hardwood seedlings and natural woody invaders near forest edges
Several oak species are frequently planted for reforestation projects in the Lower Mississippi Alluvial Valley (LMAV), but the success of these plantings has been variable. The survival and growth of planted seed or seedlings are affected by a variety of factors, including competition, herbivory, site preparation, precipitation, planting stock quality, and planting techniques. We surveyed reforest
Authors
John W. McCoy, Bobby D. Keeland, Kristi Wharton
Ground-nesting marine birds and potential for human disturbance in Glacier Bay National Park
Glacier Bay National Park and Preserve contains a diverse assemblage of marine birds that use the area for nesting, foraging and molting. The abundance and diversity of marine bird species in Glacier Bay is unmatched in the region, due in part to the geomorphic and successional characteristics that result in a wide array of habitat types (Robards and others, 2003). The opportunity for proactive ma
Authors
Mayumi L. Arimitsu, Marc D. Romano, John F. Piatt
A high resolution record of chlorine-36 nuclear-weapons-tests fallout from Central Asia
The Inilchek Glacier, located in the Tien Shan Mountains, central Asia, is unique among mid-latitude glaciers because of its relatively large average annual accumulation. In July 2000, two ice cores of 162 and 167 meters (m) in length were collected from the Inilchek Glacier for (chlorine-36) 36Cl analysis a part of a collaborative international effort to study the environmental changes archived i
Authors
J.R. Green, L.D. Cecil, H.-A. Synal, J. Santos, K.J. Kreutz, C.P. Wake
A molecular comparison of Alaskan and North East Atlantic Halicondria panicea (Pallas 1766) (Porifera: Demospongiae)
The intraspecific relationships between populations of Alaskan Halichondria cf. panicea are the subjects of ongoing research. In this study we compare CO1 sequences of Alaskan Halichondria cf. panicea with North East Atlantic Halichondria panicea and its sister species Halichondria bowerbanki. Alaskan Halichondria cf. panicea form a well-supported sister group to the European Halichondria panicea/
Authors
Dirk Erpenbeck, Anne L. Knowlton, Sandra L. Talbot, Ray C. Highsmith, Rob W.M. van Soest
A project summary: Water and energy budget assessment for a non-tidal wetland in the Sacramento-San Joaquin delta
The methods used to obtain universal cover coefficient (Kc) values for a non-tidal restored wetland in the Sacramento-San Joaquin river delta, US, during the summer of the year 2002 and to investigate possible differences during changing wind patterns are described. A micrometeorological tower over the wetland was established to quantify actual evapotranspiration (ETa) rates and surface energy flu
Authors
Frank E. Anderson, R.L. Snyder, U.K.T. Paw, Judith Z. Drexler
A prototype for understanding the effects of TMDL standards: Tying property values to sediment loads in the Lake Tahoe Basin
The Federal Clean Water Act (Section 303(d)) mandates that states develop Total Maximum Daily Load (TMDL) plans for water bodies that are on the Section 303(d) list. To be placed on the 303(d) list, a water body must be found to have water quality conditions that limit its ability to meet its designated beneficial uses. The TMDL for a water body is defined in 40 CFR 130 as the sum of waste load al
Authors
J.C. Tracy, R. Bernknopf, W. Forney, K. Hill
A South San Francisco Bay sediment budget: Wetland restoration and potential effects on phytoplankton blooms
No abstract available.
Authors
G.G. Shellenbarger, D. H. Schoellhamer, M. A. Lionberger
A web-enabled system for integrated assessment of watershed development
Researchers at Virginia Tech have put together the primary structure of a web enabled integrated modeling system that has potential to be a planning tool to help decision makers and stakeholders in making appropriate watershed management decisions. This paper describes the integrated system, including data sources, collection, analysis methods, system software and design, and issues of integrating
Authors
R. Dymond, V. Lohani, B. Regmi, R. Dietz
Adaptive bleaching: A general phenomenon
Laboratory and field data bearing on the adaptive bleaching hypothesis (ABH) are largely consistent with it; no data of which we are aware refute it. We generalize the ABH in light of these data and observations. The population of zooxanthellae within an organism is dynamic, the diversity of zooxanthellae is both surprising and difficult to ascertain, and field experiments demonstrate both turn-ov
Authors
D.G. Fautin, R. W. Buddemeier
Age of Palos Verdes submarine debris avalanche, southern California
The Palos Verdes debris avalanche is the largest, by volume, late Quaternary mass-wasted deposit recognized from the inner California Borderland basins. Early workers speculated that the sediment failure giving rise to the deposit is young, taking place well after sea level reached its present position. A newly acquired, closely-spaced grid of high-resolution, deep-tow boomer profiles of the debri
Authors
W. R. Normark, M. McGann, R. Sliter
Air temperature and snowmelt discharge characteristics, Merced River at Happy Isles, Yosemite National Park, Central Sierra Nevada
No abstract available.
Authors
D. Peterson, R. Smith, S. Hager, D. Cayan, M. Dettinger
An acoustic velocity measurement system for aiding barge traffic in the Colorado River locks near Matagorda, Texas
In July 1999, the U.S. Geological Survey installed an acoustic Doppler velocity meter in the Colorado River, near the city of Matagorda in southeast Texas. The meter is part of an integrated system used by the U.S. Army Corps of Engineers to control barge traffic that passes through a lock system located at the confluence of the Colorado River and the Gulf Intracoastal Waterway. The meter was inst
Authors
J. W. East, C. Scheffler