Gas chromatographic–mass spectrometric fragmentation study of phytoestrogens as their trimethylsilyl derivatives: Identification in soy milk and wastewater samples
Imma Ferrar, Larry B. Barber, E. Michael Thurman
2009, Journal of Chromatography A (1216) 6024-6032
An analytical method for the identification of eight plant phytoestrogens (biochanin A, coumestrol, daidzein, equol, formononetin, glycitein, genistein and prunetin) in soy products and wastewater samples was developed using gas chromatography coupled with ion trap mass spectrometry (GC/MS–MS). The phytoestrogens were derivatized as their trimethylsilyl ethers with trimethylchlorosilane (TMCS) and...
Miocene mass-transport sediments, Troodos Massif, Cyprus
A.R. Lord, R.W. Harrison, M. BouDagher-Fadel, B. D. Stone, O. Varol
2009, Proceedings of the Geologists' Association (120) 133-138
Sediment mass-transport layers of submarine origin on the northern and southern flanks of the Troodos ophiolitic massif are dated biostratigraphically as early Miocene and late Miocene, respectively and therefore represent different seismogenic events in the uplift and erosional history of the Troodos terrane. Analysis of such events has potential for...
Past permafrost on the Mid-Atlantic coastal plain, eastern United States
H. French, M. Demitroff, Wayne L. Newell
2009, Permafrost and Periglacial Processes (20) 285-294
Sand-wedge casts, soil wedges and other non-diastrophic, post-depositional sedimentary structures suggest that Late-Pleistocene permafrost and deep seasonal frost on the Mid-Atlantic Coastal Plain extended at least as far south as southern Delaware, the Eastern Shore and southern Maryland. Heterogeneous cold-climate slope deposits mantle lower valley-side slopes in central Maryland. A...
Bacterial succession within an ephemeral hypereutrophic mojave desert playa lake
J.B. Navarro, D.P. Moser, A. Flores, C. Ross, Michael R. Rosen, H. Dong, G. Zhang, B.P. Hedlund
2009, Microbial Ecology (57) 307-320
Ephemerally wet playas are conspicuous features of arid landscapes worldwide; however, they have not been well studied as habitats for microorganisms. We tracked the geochemistry and microbial community in Silver Lake playa, California, over one flooding/desiccation cycle following the unusually wet winter of 2004-2005. Over the course of the study,...
The Lake Huron pelagic fish community: persistent spatial pattern along biomass and species composition gradients
D.M. Warner, J.S. Schaeffer, T. P. O’Brien
2009, Canadian Journal of Fisheries and Aquatic Sciences (66) 1199-1215
Spatial patterns in the biomass of pelagic fish in Lake Huron have persisted over 10 years even though biomass decreased 86% and the fish community shifted from dominance by non-native species (rainbow smelt, Osmerus mordax) to dominance by native species (bloater, Coregonus hoyi). Based on multivariate analyses of acoustic biomass...
Laboratory and field testing of commercial rotational seismometers
R.L. Nigbor, J.R. Evans, C. R. Hutt
2009, Bulletin of the Seismological Society of America (99) 1215-1227
There are a small number of commercially available sensors to measure rotational motion in the frequency and amplitude ranges appropriate for earthquake motions on the ground and in structures. However, the performance of these rotational seismometers has not been rigorously and independently tested and characterized for earthquake monitoring purposes as...
Gold and trace element zonation in pyrite using a laser imaging technique: Implications for the timing of gold in orogenic and carlin-style sediment-hosted deposits
R.R. Large, L. Danyushevsky, C. Hollit, V. Maslennikov, S. Meffre, S. Gilbert, S. Bull, R. Scott, P. Emsbo, H. Thomas, B. Singh, J. Foster
2009, Economic Geology (104) 635-668
Laser ablation ICP-MS imaging of gold and other trace elements in pyrite from four different sediment- hosted gold-arsenic deposits has revealed two distinct episodes of gold enrichment in each deposit: an early synsedimentary stage where invisible gold is concentrated in arsenian diagenetic pyrite along with other trace elements, in particular,...
Predicting dietborne metal toxicity from metal influxes
M.-N. Croteau, S. N. Luoma
2009, Environmental Science & Technology (43) 4915-4921
Dietborne metal uptake prevails for many species in nature. However, the links between dietary metal exposure and toxicity are not well understood. Sources of uncertainty include the lack of suitable tracers to quantify exposure for metals such as copper, the difficulty to assess dietary processes such as food ingestion rate,...
TreeMAC: Localized TDMA MAC protocol for real-time high-data-rate sensor networks
W.-Z. Song, R. Huang, B. Shirazi, R.L. Husent
2009, Conference Paper, 7th Annual IEEE International Conference on Pervasive Computing and Communications, PerCom 2009
Earlier sensor network MAC protocols focus on energy conservation in low-duty cycle applications, while some recent applications involve real-time high-data-rate signals. This motivates us to design an innovative localized TDMA MAC protocol to achieve high throughput and low congestion in data collection sensor networks, besides energy conservation. TreeMAC divides a...
Interactions between soil thermal and hydrological dynamics in the response of Alaska ecosystems to fire disturbance
Shuhua Yi, A. David McGuire, Jennifer Harden, Eric Kasischke, Kristen L. Manies, Larry Hinzman, Anna K. Liljedahl, J. Randerson, Heping Liu, Vladimir E. Romanovsky, Sergey S. Marchenko, Yongwon Kim
2009, Journal of Geophysical Research: Biogeosciences (114)
Soil temperature and moisture are important factors that control many ecosystem processes. However, interactions between soil thermal and hydrological processes are not adequately understood in cold regions, where the frozen soil, fire disturbance, and soil drainage play important roles in controlling interactions among these processes. These interactions were investigated with...
Major earthquakes recorded by Speleothems in Midwestern U.S. caves
S.V. Panno, C.C. Lundstrom, Keith C. Hackley, B. Brandon Curry, B.W. Fouke, Z. Zhang
2009, Bulletin of the Seismological Society of America (99) 2147-2154
Historic earthquakes generated by the New Madrid seismic zone represent some of the largest recorded in the United States, yet prehistoric events are recognized only through deformation in late-Wisconsin to Holocene-age, near surface sediments (liquefaction, monoclinal folding, and changes in river meanders). In this article, we show that speleothems in...
Occurrence of gas hydrate in Oligocene Frio sand: Alaminos Canyon Block 818: Northern Gulf of Mexico
R. Boswell, D. Shelander, M. Lee, T. Latham, T. Collett, G. Guerin, G. Moridis, M. Reagan, D. Goldberg
2009, Marine and Petroleum Geology (26) 1499-1512
A unique set of high-quality downhole shallow subsurface well log data combined with industry standard 3D seismic data from the Alaminos Canyon area has enabled the first detailed description of a concentrated gas hydrate accumulation within sand in the Gulf of Mexico. The gas hydrate occurs within very fine grained,...
Deformation of the Batestown till of the Lake Michigan lobe, Laurentide ice sheet
J.F. Thomason, N.R. Iverson
2009, Journal of Glaciology (55) 131-146
Deep, pervasive shear deformation of the bed to high strains (>100) may have been primarily responsible for flow and sediment transport of the Lake Michigan lobe of the Laurentide ice sheet. To test this hypothesis, we sampled at 0.2 m increments a basal till from one advance of the lobe...
Short- and long-term response of deteriorating brackish marshes and open-water ponds to sediment enhancement by thin-layer dredge disposal
M.K. La Peyre, B. Gossman, Bryan P. Piazza
2009, Estuaries and Coasts (32) 390-402
Artificial sediment enhancement using a thin layer of dredged material has been suggested as a means to increase elevation and create soil conditions conducive to increased marsh structure and function in deteriorating marshes. Using a chronosequence approach, we examined the effects of sediment enhancement in deteriorating marsh and open-water pond...
Comment on "Revisiting the 1872 owens valley, California, earthquake" by Susan E. Hough and Kate Hutton
W. H. Bakun
2009, Bulletin of the Seismological Society of America (99) 2589-2590
Bakun (2009) argues that the conclusions of Hough and Hutton (2008) are wrong because the study failed to take into account the Sierra Nevada attenuation model of Bakun (2006). In particular, Bakun (2009) argues that propagation effects can explain the relatively high intensities generated by the 1872 Owens Valley earthquake....
Fire behavior, weather, and burn severity of the 2007 anaktuvuk river tundra fire, North Slope, Alaska
Benjamin M. Jones, Crystal A. Kolden, Randi Jandt, John T. Abatzoglou, Frank Urban, Christopher D. Arp
2009, Arctic, Antarctic, and Alpine Research (41) 309-316
In 2007, the Anaktuvuk River Fire (ARF) became the largest recorded tundra fire on the North Slope of Alaska. The ARF burned for nearly three months, consuming more than 100,000 ha. At its peak in early September, the ARF burned at a rate of 7000 ha d-1. The conditions potentially...
Evidence that pairing with genetically similar mates is maladaptive in a monogamous bird
Herve Mulard, E. Danchin, Sandra L. Talbot, Andrew M. Ramey, Scott A. Hatch, J.F. White, F. Helfenstein, R.H. Wagner
2009, BMC Evolutionary Biology (9)
BackgroundEvidence of multiple genetic criteria of mate choice is accumulating in numerous taxa. In many species, females have been shown to pair with genetically dissimilar mates or with extra-pair partners that are more genetically compatible than their social mates, thereby increasing their offsprings' heterozygosity which often correlates with...
Distinguishing iron-reducing from sulfate-reducing conditions
F. H. Chapelle, P. M. Bradley, M.A. Thomas, P.B. McMahon
2009, Ground Water (47) 300-305
Ground water systems dominated by iron‐ or sulfate‐reducing conditions may be distinguished by observing concentrations of dissolved iron (Fe2+) and sulfide (sum of H2S, HS−, and S= species and denoted here as “H2S”). This approach is based on the observation that concentrations of Fe2+ and H2S in ground water systems tend to...
Scrub-shrub bird habitat associations at multiple spatial scales in beaver meadows in Massachusetts
R.B. Chandler, D.I. King, S. DeStefano
2009, The Auk (126) 186-197
Most scrub-shrub bird species are declining in the northeastern United States, and these declines are largely attributed to regional declines in habitat availability. American Beaver (Castor canadensis; hereafter “beaver”) populations have been increasing in the Northeast in recent decades, and beavers create scrub-shrub habitat through their dam-building and foraging activities....
The use of local indicators of spatial association to improve LiDAR-derived predictions of potential amphibian breeding ponds
J.T. Julian, J.A. Young, J. W. Jones, C.D. Snyder, C. W. Wright
2009, Journal of Geographical Systems (11) 89-106
We examined whether spatially explicit information improved models that use LiDAR return signal intensity to discriminate in-pond habitat from terrestrial habitat at 24 amphibian breeding ponds. The addition of Local Indicators of Spatial Association (LISA) to LiDAR return intensity data significantly improved predictive models at all ponds, reduced residual error...
Plant response to nutrient availability across variable bedrock geologies
S.C. Castle, J. C. Neff
2009, Ecosystems (12) 101-113
We investigated the role of rock-derived mineral nutrient availability on the nutrient dynamics of overlying forest communities (Populus tremuloides and Picea engelmanni-Abies lasiocarpa v. arizonica) across three parent materials (andesite, limestone, and sandstone) in the southern Rocky Mountains of Colorado. Broad geochemical differences were observed between bedrock materials; however, bulk...
Area sensitivity in North American grassland birds: Patterns and processes
C. A. Ribic, Rolf R. Koford, J.R. Herkert, Douglas H. Johnson, N.D. Niemuth, D.E. Naugle, Kristel K. Bakker, D. W. Sample, R.B. Renfrew
2009, The Auk (126) 233-244
Grassland birds have declined more than other bird groups in North America in the past 35-40 years (Vickery and Herkert 2001, Sauer et al. 2008), prompting a wide variety of research aimed at understanding these declines, as well as conservation programs trying to reverse the declines (Askins et al. 2007)....
Satellite-marked waterfowl reveal migratory connection between H5N1 outbreak areas in China and Mongolia
D.J. Prosser, John Y. Takekawa, S. H. Newman, B. Yan, David C. Douglas, Y. Hou, Z. Xing, Dongxiao Zhang, T. Li, Y. Li, D. Zhao, W.M. Perry, E.C. Palm
2009, Ibis (151) 568-576
The role of wild birds in the spread of highly pathogenic avian influenza H5N1 has been greatly debated and remains an unresolved question. However, analyses to determine involvement of wild birds have been hindered by the lack of basic information on their movements in central Asia. Thus, we initiated a...
Effects of geolocation archival tags on reproduction and adult body mass of sooty shearwaters (Puffinus griseus)
J. Adams, D. Scott, S. McKechnie, G. Blackwell, S.A. Shaffer, H. Moller
2009, New Zealand Journal of Ecology (36) 355-366
We attached 11 g (1.4% body-mass equivalent) global location sensing (GLS) archival tag packages to tarsi of 25 breeding sooty shearwaters (Puffinus griseus, titi) on Whenua Hou (Codfish Island), New Zealand during the chick-rearing period in 2005. Compared with chicks reared by non-handled adults that did not carry tags, deployment...
Postfledging Forster's Tern movements, habitat selection, and colony attendance in San Francisco Bay
Joshua T. Ackerman, Jill D. Bluso-Demers, John Y. Takekawa
2009, Condor (111) 100-110
Relatively little is known about birds during the postfledging period when flighted chicks have left the nest and must learn to forage independently. We examined postfledging movements, habitat selection, and colony attendance of Forster's Terns (Sterna forsteri) radio-marked just before they fledged in San Francisco Bay, California. The proportion of...
