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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An ecosystem services framework for multidisciplinary research in the Colorado River headwaters
A rapidly spreading Mountain Pine Beetle epidemic is killing lodgepole pine forest in the Rocky Mountains, causing landscape change on a massive scale. Approximately 1.5 million acres of lodgepoledominated forest is already dead or dying in Colorado, the infestation is still spreading rapidly, and it is expected that in excess of 90 percent of all lodgepole forest will ultimately be killed. Drough
Authors
D.J. Semmens, J.S. Briggs, D.A. Martin
An estimate of the historic population size of adult pallid sturgeon in the upper Missouri river basin, Montana and North Dakota
Juvenile pallid sturgeon Scaphirhynchus albus raised in hatcheries and stocked in the wild are used to augment critically imperiled populations of this federally endangered species in the United States. For pallid sturgeon in recovery priority management area 2 (RPMA 2) of the Missouri River and lower Yellowstone River where natural recruitment has not occurred for decades, restoration programs ai
Authors
P.J. Braaten, D.B. Fuller, R.D. Lott, G.R. Jordan
An integrated approach to assess broad-scale condition of coastal wetlands - The Gulf of Mexico Coastal Wetlands pilot survey
The Environmental Protection Agency (EPA) and U.S. Geological Survey (USGS) initiated a two-year regional pilot survey in 2007 to develop, test, and validate tools and approaches to assess the condition of northern Gulf of Mexico (GOM) coastal wetlands. Sampling sites were selected from estuarine and palustrine wetland areas with herbaceous, forested, and shrub/scrub habitats delineated by the US
Authors
J.A. Nestlerode, V.D. Engle, P. Bourgeois, P.T. Heitmuller, J.M. Macauley, Y.C. Allen
Analysis of hydromechanical well tests in fractured sedimentary rock at the NAWC site, New Jersey
No abstract available.
Authors
L.C. Murdoch, D.B. Hisz, J.F. Ebenhack, D.E. Fowler, C. R. Tiedeman, L.N. Germanovich
Aquatic ecosystems in Central Colorado are influenced by mineral forming processes and historical mining
Stream water and sediment toxicity to aquatic insects were quantified from central Colorado catchments to distinguish the effect of geologic processes which result in high background metals concentrations from historical mining. Our sampling design targeted small catchments underlain by rocks of a single lithology, which allowed the development of biological and geochemical baselines without the c
Authors
T.S. Schmidt, S. E. Church, W.H. Clements, K.A. Mitchell, D. L. Fey, R. B. Wanty, P. L. Verplanck, Juan C.A. San, T. L. Klein, E.H. deWitt, B.W. Rockwell
Assessment of electrical resistivity method to map groundwater seepage zones in heterogeneous sediments
Underwater electrical‐resistivity data were collected along the southwest shore of Mirror Lake, NH, as part of a multi‐year assessment of the utility of geophysics for mapping groundwater seepage beneath lakes. We found that resistivity could locate shoreline sections where water is seeping out of the lake. A resistivity line along the lake bottom starting 27‐m off shore and continuing 27‐m on sho
Authors
Michael P. Gagliano, Jonathan E. Nyquist, Laura Toran, Donald O. Rosenberry
Bedrock geology of the Montpelier area, central Vermont
No abstract available.
Authors
Gregory J. Walsh, Jonathan Kim, Marjorie H. Gale
Biodegradation of 17β-estradiol, estrone, and testosterone in stream sediments
The release of endocrine-disrupting chemicals (EDCs) in wastewater treatment plant (WWTP) effluent poses a significant threat to the ecology of surface water receptors, due to impacts on the hormonal control, sexual development, reproductive success and community structure of the indigenous aquatic organisms and associated wildlife. Among the EDCs commonly observed in WWTP effluent, the natural [e
Authors
P. M. Bradley, F. H. Chapelle, L. B. Barber, P. B. McMahon, J.L. Gray, D.W. Kolpin
Biomass of deepwater demersal forage fishes in Lake Huron, 1994-2007: Implications for offshore predators
We estimated the biomass of deepwater demersal forage fishes (those species common in the diets of lake trout and Chinook salmon) in Lake Huron during the period 1994-2007. The estimated total lake-wide biomass of deepwater demersal fishes in 2007 was reduced by 87 percent of that observed in 1994. Alewife biomass remained near the record low observed in 2004. Biomass of young-of-the-year rainbow
Authors
E.F. Roseman, S.C. Riley
Cacades: A reliable dissemination protocol for data collection sensor network
In this paper, we propose a fast and reliable data dissemination protocol Cascades to disseminate data from the sink(base station) to all or a subset of nodes in a data collection sensor network. Cascades makes use of the parentmonitor-children analogy to ensure reliable dissemination. Each node monitors whether or not its children have received the broadcast messages through snooping children's r
Authors
Y. Peng, W. Song, R. Huang, M. Xu, B. Shirazi, R. LaHusen, G. Pei
Classification of CO2 Geologic Storage: Resource and Capacity
The use of the term capacity to describe possible geologic storage implies a realistic or likely volume of CO2 to be sequestered. Poor data quantity and quality may lead to very high uncertainty in the storage estimate. Use of the term "storage resource" alleviates the implied certainty of the term "storage capacity". This is especially important to non- scientists (e.g. policy makers) because "ca
Authors
S.M. Frailey, R.J. Finley
Climatic extremes improve predictions of spatial patterns of tree species
Understanding niche evolution, dynamics, and the response of species to climate change requires knowledge of the determinants of the environmental niche and species range limits. Mean values of climatic variables are often used in such analyses. In contrast, the increasing frequency of climate extremes suggests the importance of understanding their additional influence on range limits. Here, we as
Authors
N.E. Zimmermann, Nigel G. Yoccoz, T.C. Edwards, E.S. Meier, W. Thuiller, Antoine Guisan, D.R. Schmatz, P.B. Pearman