Planktivory in the changing Lake Huron zooplankton community: Bythotrephes consumption exceeds that of Mysis and fish
D.B. Bunnell, R. Douglas Hunter, D.M. Warner, M.A. Chriscinske, E.F. Roseman
2011, Freshwater Biology (56) 1281-1296
Oligotrophic lakes are generally dominated by calanoid copepods because of their competitive advantage over cladocerans at low prey densities. Planktivory also can alter zooplankton community structure. We sought to understand the role of planktivory in driving recent changes to the zooplankton community of Lake Huron, a large oligotrophic lake on...
Estimating phosphorus availability for microbial growth in an emerging landscape
S.K. Schmidt, C.C. Cleveland, D.R. Nemergut, S.C. Reed, A.J. King, P. Sowell
2011, Geoderma (163) 135-140
Estimating phosphorus (P) availability is difficult—particularly in infertile soils such as those exposed after glacial recession—because standard P extraction methods may not mimic biological acquisition pathways. We developed an approach, based on microbial CO2 production kinetics and conserved carbon:phosphorus (C:P) ratios, to estimate the amount of P available for microbial...
Modal-pushover-based ground-motion scaling procedure
Erol Kalkan, Anil K. Chopra
2011, Journal of Structural Engineering (137) 298-310
Earthquake engineering is increasingly using nonlinear response history analysis (RHA) to demonstrate the performance of structures. This rigorous method of analysis requires selection and scaling of ground motions appropriate to design hazard levels. This paper presents a modal-pushover-based scaling (MPS) procedure to scale ground motions for use in a nonlinear...
Microbial sulfate reduction and the sulfur budget for a complete section of altered oceanic basalts, IODP Hole 1256D (eastern Pacific)
Jeffrey C. Alt, Wayne C. Shanks
2011, Earth and Planetary Science Letters (310) 73-83
Sulfide mineralogy and the contents and isotope compositions of sulfur were analyzed in a complete oceanic volcanic section from IODP Hole 1256D in the eastern Pacific, in order to investigate the role of microbes and their effect on the sulfur budget in altered upper oceanic crust. Basalts in the 800m...
Storms, floods, and the science of atmospheric rivers
F.M. Ralph, M. D. Dettinger
2011, Eos, Transactions, American Geophysical Union (92) 265-266
Imagine a stream of water thousands of kilometers long and as wide as the distance between New York City and Washington, D. C., flowing toward you at 30 miles per hour. No, this is not some hypothetical physics problemit is a real river, carrying more water than 7-15 Mississippi Rivers...
Comparative phylogeography of a coevolved community: Concerted population expansions in Joshua trees and four yucca moths
Christopher Irwin Smith, Shantel Tank, William Godsoe, Jim Levenick, Eva Strand, Todd C. Esque, Olle Pellmyr
2011, PLoS ONE (6)
Comparative phylogeographic studies have had mixed success in identifying common phylogeographic patterns among co-distributed organisms. Whereas some have found broadly similar patterns across a diverse array of taxa, others have found that the histories of different species are more idiosyncratic than congruent. The variation in the results of comparative phylogeographic...
Role of water in hydrocarbon generation from Type-I kerogen in Mahogany oil shale of the Green River Formation
M. D. Lewan, S. Roy
2011, Organic Geochemistry (42) 31-41
Hydrous and anhydrous closed-system pyrolysis experiments were conducted on a sample of Mahogany oil shale (Eocene Green River Formation) containing Type-I kerogen to determine whether the role of water had the same effect on petroleum generation as reported for Type-II kerogen in the Woodford Shale. The experiments were conducted at...
Transitions of interaction outcomes in a uni-directional consumer-resource system
Y. Wang, Donald L. DeAngelis
2011, Journal of Theoretical Biology (280) 43-49
A uni-directional consumer–resource system of two species is analyzed. Our aim is to understand the mechanisms that determine how the interaction outcomes depend on the context of the interaction; that is, on the model parameters. The dynamic behavior of the model is described and, in particular, it is demonstrated that no periodic...
Group on Earth Observations (GEO) global drought early warning information service
W. Pozzi, D. Cripe, J. Vogt, M. Werner, R. Heim, M.J. Brewer, J. Sheffield, R. Westerhoff, R. Stefanski, M. Svoboda, J. Verdin
2011, Conference Paper, 2011 GEOSS Workshop XL - Managing Drought through Earth Observation, GEOSS 2011
[No abstract available]...
Fifty-second supplement to the American Ornithologists' Union Check-list of North American Birds
R. Terry Chesser, Richard C. Banks, F. Keith Barker, Carla Cicero, Jon L. Dunn, Andrew W. Kratter, Irby J. Lovette, Pamela C. Rasmussen, J.V. Remsen Jr., James D. Rising, Douglas F. Stotz, Kevin Winker
2011, The Auk (128) 600-613
This is the 11th supplement since publication of the seventh edition of the Check-list of North American Birds (American Ornithologists' Union AOU 1998). It summarizes decisions made between 1 April 2010 and 15 April 2011 by the AOU's Committee on Classification and Nomenclature-North and Middle America. The Committee has continued...
Larval and juvenile Pacific herring Clupea pallasii are not susceptible to infectious hematopoietic necrosis under laboratory conditions
L.M. Hart, G.S. Traxler, K.A. Garver, J. Richard, J.L. Gregg, C.A. Grady, Gael Kurath, P.K. Hershberger
2011, Diseases of Aquatic Organisms (93) 105-110
Infectious hematopoietic necrosis (IHN) leads to periodic epidemics among certain wild and farmed fish species of the Northeast (NE) Pacific. The source of the IHN virus (IHNV) that initiates these outbreaks remains unknown; however, a leading hypothesis involves viral persistence in marine host species such as Pacific herring Clupea pallasii....
Sulfate threshold target to control methylmercury levels in wetland ecosystems
J. Corrales, G.M. Naja, C. Dziuba, R.G. Rivero, W. Orem
2011, Science of the Total Environment (409) 2156-2162
Sulfate contamination has a significant environmental implication through the stimulation of toxic hydrogen sulfide and methylmercury (MeHg) production. High levels of MeHg are a serious problem in many wetland ecosystems worldwide. In the Florida Everglades, it has been demonstrated that increasing MeHg occurrence is due to a sulfate contamination problem....
Evaluation of a black-footed ferret resource utilization function model
D.A. Eads, J.J. Millspaugh, Dean E. Biggins, D.S. Jachowski, T.M. Livieri
2011, Journal of Wildlife Management (75) 1155-1163
Resource utilization function (RUF) models permit evaluation of potential habitat for endangered species; ideally such models should be evaluated before use in management decision‐making. We evaluated the predictive capabilities of a previously developed black‐footed ferret (Mustela nigripes) RUF. Using the population‐level RUF, generated from ferret observations at an adjacent yet...
Cold-climate slope deposits and landscape modifications of the Mid-Atlantic Coastal Plain, Eastern USA
Wayne L. Newell, B.D. Dejong
2011, Geological Society Special Publication (354) 259-276
The effects of Pleistocene cold-climate geomorphology are distributed across the weathered and eroded Mid-Atlantic Coastal Plain uplands from the Wisconsinan terminal moraine south to Tidewater Virginia. Cold-climate deposits and landscape modifications are superimposed on antecedent landscapes of old, weathered Neogene upland gravels and Pleistocene marine terraces that had been built...
Age, composition, and areal distribution of the Pliocene Lawlor Tuff, and three younger Pliocene tuffs, California and Nevada
Andrei M. Sarna-Wojcicki, Alan L. Deino, Robert J. Fleck, Robert J. McLaughlin, David Wagner, Elmira Wan, David B. Wahl, John W. Hillhouse, Michael Perkins
2011, Geosphere (7) 599-628
The Lawlor Tuff is a widespread dacitic tephra layer produced by Plinian eruptions and ash flows derived from the Sonoma Volcanics, a volcanic area north of San Francisco Bay in the central Coast Ranges of California, USA. The younger, chemically similar Huichica tuff, the tuff of Napa, and the...
Final report on the Seventh International Comparison of Absolute Gravimeters (ICAG 2005)
Z. Jiang, O. Francis, L. Vitushkin, V. Palinkas, A. Germak, M. Becker, G. D’Agostino, M. Amalvict, R. Bayer, M. Bilker-Koivula, S. Desogus, J. Faller, R. Falk, J. Hinderer, C. Gagnon, T. Jakob, E. Kalish, J. Kostelecky, C. Lee, J. Liard, Y. Lokshyn, B. Luck, J. Makinen, S. Mizushima, Moigne N. Le, C. Origlia, E.R. Pujol, P. Richard, L. Robertsson, D. Ruess, D. Schmerge, Y. Stus, S. Svitlov, S. Thies, C. Ullrich, M. Van Camp, A. Vitushkin, W. Ji, H. Wilmes
2011, Metrologia (48) 246-260
The Bureau International des Poids et Mesures (BIPM), Sevres, France, hosted the 7th International Comparison of Absolute Gravimeters (ICAG) and the associated Relative Gravity Campaign (RGC) from August to September 2005.;ICAG 2005 was prepared and performed as a metrological pilot study, which aimed:;(1) To determine the gravity comparison reference values;;(2)...
Oligocene and Miocene arc volcanism in northeastern California: evidence for post-Eocene segmentation of the subducting Farallon plate
J.P. Colgan, A.E. Egger, D. A. John, B. Cousens, R.J. Fleck, C.D. Henry
2011, Geosphere (7) 733-755
The Warner Range in northeastern California exposes a section of Tertiary rocks over 3 km thick, offering a unique opportunity to study the long-term history of Cascade arc volcanism in an area otherwise covered by younger volcanic rocks. The oldest locally sourced volcanic rocks in the Warner Range are Oligocene...
Avian research on U.S. Forest Service Experimental Forests and Ranges: Emergent themes, opportunities, and challenges
Scott H. Stoleson, D.I. King, M. Tomosy
2011, Forest Ecology and Management (262) 49-52
Since 1908, U.S. Forest Service Experimental Forests and Ranges have been dedicated to long-term interdisciplinary research on a variety of ecological and management questions. They encompass a wide diversity of life zones and ecoregions, and provide access to research infrastructure, opportunities for controlled manipulations, and integration with other types of...
Detrital-zircon geochronology and sedimentary provenance
W.A. Thomas
2011, Lithosphere (3) 304-308
[No abstract available]...
Change of impervious surface area between 2001 and 2006 in the conterminous United States
George Z. Xian, Collin G. Homer, Jon Dewitz, Joyce Fry, N. Hossain, J. Wickham
2011, Photogrammetric Engineering and Remote Sensing (77) 758-762
No abstract available....
National intergrated drought information system
R. Pulwarty, J. Verdin, L. Darby, C. McNutt, R. Webb
2011, Conference Paper, 2011 GEOSS Workshop XL - Managing Drought through Earth Observation, GEOSS 2011
[No abstract available]...
Alaska North Slope regional gas hydrate production modeling forecasts
S.J. Wilson, R.B. Hunter, Timothy S. Collett, S. Hancock, R. Boswell, B.J. Anderson
2011, Marine and Petroleum Geology (28) 460-477
A series of gas hydrate development scenarios were created to assess the range of outcomes predicted for the possible development of the “Eileen” gas hydrate accumulation, North Slope, Alaska. Production forecasts for the “reference case” were built using the 2002 Mallik production tests, mechanistic simulation, and geologic studies conducted...
Genetic differentiation of the Kittlitz's Murrelet Brachyramphus brevirostris in the Aleutian Islands and Gulf of Alaska
T.P. Birt, D. Mackinnon, John F. Piatt, Vicki L. Friesen
2011, Marine Ornithology: Journal of Seabird Research and Conservation (39) 45-51
Information about the distribution of genetic variation within and among local populations of the Kittlitz's Murrelet Brachyramphus brevirostris is needed for effective conservation of this rare and declining species. We compared variation in a 429 base pair fragment of the mitochondrial control region and 11 microsatellite loci among 53 Kittlitz's...
Gender-based differences in Florida apple snail (Pomacea paludosa) movements
P. L. Valentine-Darby, P.C. Darby, H.F. Percival
2011, Malacologia (54) 109-118
Gastropod movements have been studied in the context of habitat selection, finding food and mates, and avoiding predation. Many of these studies were conducted in the laboratory, where constraints on spatial scale influence behavior. We conducted a field study of Florida apple snail (Pomacea paludosa) movements using telemetry. We hypothesized...
Distribution, population status and trends of Kittlitz's murrelet Brachyramphus brevirostris in Lower Cook Inlet and Kachemak Bay, Alaska
Kathy J. Kuletz, Suzann G. Speckman, John F. Piatt, E.A. Labunski
2011, Marine Ornithology: Journal of Seabird Research and Conservation (39) 85-95
Lower Cook Inlet (LCI) in south-central Alaska is unusual among the breeding areas of Kittlitz's Murrelet Brachyramphus brevirostris because of human impacts on the marine and terrestrial environments and because of the lack of tidewater glaciers. In LCI the Kittlitz's Murrelet co-exists with the more abundant Marbled Murrelet, which complicates...
