Conference Papers
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Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
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Hubble Space Telescope observations of Europa in and out of eclipse
Europa is a prime target for astrobiology and has been prioritized as the next target for a National Aeronautics and Space Administration flagship mission. It is important, therefore, that we advance our understanding of Europa, its ocean and physical environment as much as possible. Here, we describe observations of Europa obtained during its orbital eclipse by Jupiter using the Hubble Space Tele
Authors
W.B. Sparks, M. McGrath, K. Hand, H.C. Ford, P. Geissler, J.H. Hough, E.L. Turner, C.F. Chyba, R. Carlson, M. Turnbull
Hydrodynamic modeling of juvenile mussel dispersal in a large river: The potential effects of bed shear stress and other parameters
Because unionid mussels have a parasitic larval stage, they are able to disperse upstream and downstream as larvae while attached to their host fish and with flow as juveniles after excystment from the host. Understanding unionid population ecology requires knowledge of the processes that affect juvenile dispersal prior to establishment. We examined presettlement (transport and dispersion with flo
Authors
J.A. Daraio, L.J. Weber, T.J. Newton
Integrated use of surface geophysical methods for site characterization — A case study in North Kingstown, Rhode Island
A suite of complementary, non‐invasive surface geophysical methods was used to assess their utility for site characterization in a pilot investigation at a former defense site in North Kingstown, Rhode Island. The methods included frequency‐domain electromagnetics (FDEM), ground‐penetrating radar (GPR), electrical resistivity tomography (ERT), and multi‐channel analysis of surface‐wave (MASW) seis
Authors
Carole D. Johnson, John W. Lane, William C. Brandon, Christine A.P. Williams, Eric A. White
Long generation time delays the genetic response to habitat fragmentation in the threatened florida sand skink
A recent study showed that populations of the threatened Florida Sand Skink had limited loss of genetic diversity over the past 60 yr as a consequence of anthropogenic fragmentation. This study assumed that 60 yr represents 3037 generations for the Florida Sand Skink, but a new evaluation of markrecapture data shows that 60 yr represents only about 15 generations. This result suggests that too lit
Authors
E.D. McCoy, J.Q. Richmond, H.R. Mushinsky, E.J. Britt, J.S. Godley
Longitudinal structure in temperate stream fish communities: evaluating conceptual models with temporal data
Five conceptual models of longitudinal fish community organization in streams were examined: (1) niche diversity model (NDM), (2) stream continuum model (SCM), (3) immigrant accessibility model (IAM), (4) environmental stability model (ESM), and (5) adventitious stream model (ASM). We used differences among models in their predictions about temporal species turnover, along with five spatiotemporal
Authors
James H. Roberts, Nathaniel P. Hitt
Maintenance of Eastern hemlock forests: Factors associated with hemlock vulnerability to hemlock woolly adelgid
Eastern hemlock (Tsuga canadensis [L.]) is the most shade-tolerant and long-lived tree species in eastern North America. The hemlock woolly adelgid (Adelges tsugae) (HWA), is a nonnative invasive insect that feeds on eastern hemlock and Carolina hemlock (Tsuga caroliniana Engelm.). HWA currently is established in 17 eastern states and is causing tree decline and wide-ranging tree mortality. Our da
Authors
Mary Ann Fajvan, Petra Bohall Wood
Migration patterns and movements of sandhill cranes wintering in central and southwestern Louisiana
In this study we trapped wintering sandhill cranes (Grus canadensis) in Louisiana and fitted them with satellite transmitters to determine their migration routes. Four of the 6 sandhill cranes with validated locations and a terminus point used the Central Flyway for spring migration; 2 of these 4 (the only 2 for which we have data) also used the Central Flyway for fall migration. Two of the 6 bird
Authors
Sammy L. King, Aaron R. Pierce, Kent Hersey, Nicholas Winstead
Morphological and molecular reassessment of graptemys oculifera and Graptemys flavimaculata (Testudines: Emydidae)
The turtle genus Graptemys consists of 15 recognized taxa, distinguished largely on the basis of pigmentation pattern (i.e., soft tissue and shell), head size, and shell morphology. However, phylogenetic studies have shown limited sequence divergence within the genus and between Graptemys oculifera and Graptemys flavimaculata relative to most other members of the Emydidae. Graptemys oculifera of t
Authors
J.R. Ennen, B.R. Kreiser, C.P. Qualls, J.E. Lovich
NetCDF-CF-OPeNDAP: Standards for ocean data interoperability and object lessons for community data standards processes
It is generally recognized that meeting society's emerging environmental science and management needs will require the marine data community to provide simpler, more effective and more interoperable access to its data. There is broad agreement, as well, that data standards are the bedrock upon which interoperability will be built. The path that would bring the marine data community to agree upon a
Authors
Steven C. Hankin, Jon D. Blower, Thierry Carval, Kenneth S. Casey, Craig Donlon, Olivier Lauret, Thomas Loubrieu, Ashwanth Srinivasan, Joaquin Trinanes, Øystein Godøy, Roy Mendelssohn, Richard P. Signell, Jeff de La Beaujardiere, Peter Cornillon, Frederique Blanc, Russ Rew, Jack Harlan
New software methods in radar ornithology using WSR-88D weather data and potential application to monitoring effects of climate change on bird migration
Radar ornithology has provided tools for studying the movement of birds, especially related to migration. Researchers have presented qualitative evidence suggesting that birds, or at least migration events, can be identified using large broad scale radars such as the WSR-88D used in the NEXRAD weather surveillance system. This is potentially a boon for ornithologists because such data cover a larg
Authors
Reginald Mead, John Paxton, Richard S. Sojda
Ocean and coastal data management
We introduce data management concepts, including what we mean by "data" and its "management," sources of data, interoperability, and data geometry. We then discuss various components of a data management system. Finally, we summarize some existing ocean and coastal data management efforts. We make specific recommendations throughout the paper. We are generally optimistic that ocean and coastal dat
Authors
Jeff de La Beaujardière, C Beegle-Krause, Luis Bermudez, Steven C. Hankin, Lisa Hazard, Eoin Howlett, Steven Le, Roger Proctor, Richard P. Signell, Derrick P. Snowden, Julie Thomas
Overview of selected surrogate technologies for high-temporal resolution suspended-sediment monitoring
Traditional methods for characterizing selected properties of suspended sediments in rivers are being augmented and in some cases replaced by cost-effective surrogate instruments and methods that produce a temporally dense time series of quantifiably accurate data for use primarily in sediment-flux computations. Turbidity is the most common such surrogate technology, and the first to be sanctione
Authors
John R. Gray, Jeffrey W. Gartner