Conference Papers
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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.
Filter Total Items: 5518
Monitoring behaviors and activity of bats at wind turbines with near infrared videography Monitoring behaviors and activity of bats at wind turbines with near infrared videography
No abstract available.
Authors
Paul M. Cryan, P. M. Gorresen, F.J. Bonaccorso, M. A. Hayes
Contaminants limit ecosystem potential, not average potential of ecosystems Contaminants limit ecosystem potential, not average potential of ecosystems
No abstract available.
Authors
Travis S. Schmidt, W.H. Clements, Brian S. Cade
Transfer of trace metals from streams to terrestrial food webs by emerging aquatic insects in mineralized alpine ecosystems Transfer of trace metals from streams to terrestrial food webs by emerging aquatic insects in mineralized alpine ecosystems
No abstract available.
Authors
Johanna M. Kraus, R. B. Wanty, Travis S. Schmidt, David M. Walters, Craig A. Stricker
I3N risk assessment and pathway analysis: Tools for the prevention of biological invasions I3N risk assessment and pathway analysis: Tools for the prevention of biological invasions
Information on invasive alien species from published and unpublished accounts and databases is usually scattered in locations and formats that are not easily accessible. Customized informatics tools for collecting and organizing invasive species information can help resource managers better control biological invasions. The Invasives Information Network (I3N) of the Inter-American...
Authors
Annie Simpson, Elizabeth A. Sellers
Identifying limits on stream insect density exposed to metals in the presence of co-limiting factors Identifying limits on stream insect density exposed to metals in the presence of co-limiting factors
No abstract available.
Authors
Travis S. Schmidt, W.H. Clements, Brian S. Cade
Land cover change, biogeochemical modelling of carbon stocks, and climate change in West Africa Land cover change, biogeochemical modelling of carbon stocks, and climate change in West Africa
The carbon in ecosystems exists in dynamic soil and vegetation pools which vary in amounts and cycle with the global atmosphere at varying rates. These stocks and fluxes play important roles in global carbon regulation and in the maintenance of goods and services. Changes in land cover or ecosystems result in increased or decreased fluxes to the atmosphere and play a major role in...
Authors
Larry L. Tieszen, G. Gray Tappan, Z. Tan, E. Tachie-Obeng
Long-term natural attenuation of crude oil in the subsurface Long-term natural attenuation of crude oil in the subsurface
The time frame for natural attenuation of crude oil contamination in the subsurface has been studied for the last 27 years at a spill site located near Bemidji, Minnesota, USA. Data from the groundwater contaminant plume show that dissolved benzene concentrations adjacent to the oil decreased by 50% between 1993 and 2007. To assess how this decrease is related to benzene concentrations...
Authors
Barbara A. Bekins, Mary Jo Baedecker, Robert P. Eganhouse, William N. Herkelrath
Valuation of rangeland ecosystem services Valuation of rangeland ecosystem services
Economic valuation lends itself well to the anthropocentric orientation of ecosystem services. An economic perspective on ecosystems portrays them as natural assets providing a flow of goods and services valuable to individuals and society collectively. A few examples include the purification of drinking water, reduced risk from flooding and other extreme events, pollination of...
Authors
W.R. Gascoigne
Source apportionment of atmospheric trace gases and particulate matter--Comparison of log-ratio and traditional approaches Source apportionment of atmospheric trace gases and particulate matter--Comparison of log-ratio and traditional approaches
No abstract available.
Authors
Mark A. Engle, Bernhard Peucker-Ehrenbrink, Josep M. Martin-Fernandez, David P. Krabbenhoft, Paul J. Lamothe, Michael H. Bothner, Ricardo A. Olea, Allan Kolker, Michael T. Tate
By
Ecosystems Mission Area, Water Resources Mission Area, Energy Resources Program, Environmental Health Program, Toxic Substances Hydrology, Geology, Energy & Minerals Science Center, Upper Midwest Environmental Sciences Center, Upper Midwest Water Science Center, Woods Hole Coastal and Marine Science Center, M3 Research Laboratory
Identifying biogeochemical processes beneath stormwater infiltration ponds in support of a new best management practice for groundwater protection Identifying biogeochemical processes beneath stormwater infiltration ponds in support of a new best management practice for groundwater protection
When applying a stormwater infiltration pond best management practice (BMP) for protecting the quality of underlying groundwater, a common constituent of concern is nitrate. Two stormwater infiltration ponds, the SO and HT ponds, in central Florida, USA, were monitored. A temporal succession of biogeochemical processes was identified beneath the SO pond, including oxygen reduction
Authors
Andrew M. O’Reilly, Ni-Bin Chang, Martin P. Wanielista, Zhemin Xuan
2-D inner-shelf current observations from a single VHF WEllen RAdar (WERA) station 2-D inner-shelf current observations from a single VHF WEllen RAdar (WERA) station
The majority of High Frequency (HF) radars used worldwide operate at medium to high frequencies (8 to 30 MHz) providing spatial resolutions ranging from 3 to 1.5 km and ranges from 150 to 50 km. This paper presents results from the deployment of a single Very High Frequency (VHF, 48 MHz) WEllen RAdar (WERA) radar with spatial resolution of 150 m and range 10-15 km, used in the nearshore...
Authors
G. Voulgaris, N. Kumar, K.-W. Gurgel, John C. Warner, Jeffrey H. List
A case study of alternative site response explanatory variables in Parkfield, California A case study of alternative site response explanatory variables in Parkfield, California
The combination of densely-spaced strong-motion stations in Parkfield, California, and spectral analysis of surface waves (SASW) profiles provides an ideal dataset for assessing the accuracy of different site response explanatory variables. We judge accuracy in terms of spatial coverage and correlation with observations. The performance of the alternative models is period-dependent, but...
Authors
E.M. Thompson, L.G. Baise, R. E. Kayen, E.C. Morgan, J. Kaklamanos