Physical criteria for distinguishing sandy tsunami and storm deposits using modern examples
Robert A. Morton, Guy Gelfenbaum, Bruce E. Jaffe
2007, Sedimentary Geology (200) 184-207
Modern subaerial sand beds deposited by major tsunamis and hurricanes were compared at trench, transect, and sub-regional spatial scales to evaluate which attributes are most useful for distinguishing the two types of deposits. Physical criteria that may be diagnostic include: sediment composition,...
Implications of the 26 December 2004 Sumatra-Andaman earthquake on tsunami forecast and assessment models for great subduction-zone earthquakes
Eric L. Geist, Vasily V. Titov, Diego Arcas, Fred F. Pollitz, Susan L. Bilek
2007, Bulletin of the Seismological Society of America (97) S249-S270
Results from different tsunami forecasting and hazard assessment models are compared with observed tsunami wave heights from the 26 December 2004 Indian Ocean tsunami. Forecast models are based on initial earthquake information and are used to estimate tsunami wave heights during propagation. An empirical forecast relationship based only on seismic...
Brown trout and food web interactions in a Minnesota stream
J. K. H. Zimmerman, B. Vondracek
2007, Freshwater Biology (52) 123-136
1. We examined indirect, community-level interactions in a stream that contained non-native brown trout (Salmo trutta Linnaeus), native brook trout (Salvelinus fontinalis Mitchill) and native slimy sculpin (Cottus cognatus Richardson). Our objectives were to examine benthic invertebrate composition and prey selection of fishes (measured by total invertebrate dry mass, dry...
Three new percid fishes (Percidae: Percina) from the Mobile Basin drainage of Alabama, Georgia, and Tennessee
J.D. Williams, D.A. Neely, S. J. Walsh, N.M. Burkhead
2007, Zootaxa 1-28
Three new species of Percina are described from upland drainages of the Mobile Basin. Two of the three species are narrowly distributed: P. kusha, the Bridled Darter, is currently known only from the Conasauga River drainage in Georgia and Tennessee and Etowah River drainage in Georgia, both tributaries of the...
Lack of size selectivity for paddlefish captured in hobbled gillnets
G.D. Scholten, P.W. Bettoli
2007, Fisheries Research (83) 355-359
A commercial fishery for paddlefish Polyodon spathula caviar exists in Kentucky Lake, a reservoir on the lower Tennessee River. A 152-mm (bar-measure) minimum mesh size restriction on entanglement gear was enacted in 2002 and the minimum size limit was increased to 864 mm eye-fork length to reduce the possibility of...
The occurrence of the colonial ascidian Didemnum sp. on Georges Bank gravel habitat: ecological observations and potential effects on groundfish and scallop fisheries
P. C. Valentine, J.S. Collie, R.N. Reid, R. G. Asch, Vincent G. Guida, D.S. Blackwood
2007, Journal of Experimental Marine Biology and Ecology (342) 179-181
The colonial ascidian Didemnum sp. is present on the Georges Bank fishing grounds in a gravel habitat where the benthic invertebrate fauna has been monitored annually since 1994. The species was not noted before 2002 when large colonies were first observed; and by 2003 and 2004 it covered large areas...
February 2003 marine atmospheric conditions and the bora over the northern Adriatic
C.E. Dorman, S. Carniel, L. Cavaleri, M. Sclavo, J. Chiggiato, J. Doyle, T. Haack, J. Pullen, B. Grbec, I. Vilibic, I. Janekovic, C. Lee, V. Malacic, M. Orlic, E. Paschini, A. Russo, R. P. Signell
2007, Journal of Geophysical Research C: Oceans (112)
A winter oceanographic field experiment provided an opportunity to examine the atmospheric marine conditions over the northern Adriatic. Mean February winds are from a northeasterly direction over most of the Adriatic and a more northerly direction along the western coast. Wind speeds are fastest in jets over the NE coast...
TiO2 as a photocatalyst for control of the aquatic invasive alga, Cladophora, under natural and artificial light
J.R. Peller, R.L. Whitman, S. Griffith, P. Harris, C. Peller, J. Scalzitti
2007, Journal of Photochemistry and Photobiology A: Chemistry (186) 212-217
Cladophora, a nuisance and invasive, filamentous algae (Chlorophyta), massively accumulates along the shores of the lower Great Lakes each summer causing great economic damage and compromising recreational opportunity and perhaps public health. In vitro experiments showed that Cladophora samples were physically and biologically degraded when subjected to TiO2-mediated photocatalysis. For...
Litterfall production along successional and altitudinal gradients of subtropical monsoon evergreen broadleaved forests in Guangdong, China
G. Zhou, L. Guan, X. Wei, Dongxiao Zhang, Q. Zhang, J. Yan, D. Wen, J. Liu, S. Liu, Z. Huang, G. Kong, J. Mo, Q. Yu
2007, Plant Ecology (188) 77-89
Evaluation of litterfall production is important for understanding nutrient cycling, forest growth, successional pathways, and interactions with environmental variables in forest ecosystems. Litterfall was intensively studied during the period of 1982-2001 in two subtropical monsoon vegetation gradients in the Dinghushan Biosphere Reserve, Guangdong Province, China. The two gradients include: (1)...
Egg clutch characteristics of the barking treefrog, Hyla gratiosa, from North Carolina and Florida
M. S. Gunzburger, J. Travis
2007, Herpetological Review (38) 22-24
[No abstract available]...
Influence of land use and climate on wetland breeding birds in the Prairie Pothole region of Canada
G.M. Forcey, G.M. Linz, W.E. Thogmartin, W.J. Bleier
2007, Canadian Journal of Zoology (85) 421-436
Bird populations are influenced by a variety of factors at both small and large scales that range from the presence of suitable nesting habitat, predators, and food supplies to climate conditions and land-use patterns. We evaluated the influences of regional climate and land-use variables on wetland breeding birds in the...
Natural landscape and stream segment attributes influencing the distribution and relative abundance of riverine smallmouth bass in Missouri
S.K. Brewer, C.F. Rabeni, S.P. Sowa, G. Annis
2007, North American Journal of Fisheries Management (27) 326-341
Protecting and restoring fish populations on a regional basis are most effective if the multiscale factors responsible for the relative quality of a fishery are known. We spatially linked Missouri's statewide historical fish collections to environmental features in a geographic information system, which was used as a basis for modeling...
Survival and tag retention of Pacific lamprey larvae and macrophthalmia marked with coded wire tags
M.H. Meeuwig, A.L. Puls, J.M. Bayer
2007, North American Journal of Fisheries Management (27) 96-102
We examined the survival, tag retention, and growth of Pacific lamprey Lampetra tridentata larvae and macrophthalmia marked with standard-length decimal coded wire tags and exposed to two levels of handling stress. The survival of marked individuals did not differ from that of unmarked individuals at either life stage for the...
Bacterioplankton communities of Crater Lake, OR: Dynamic changes with euphotic zone food web structure and stable deep water populations
E. Urbach, K.L. Vergin, G.L. Larson, S. J. Giovannoni
2007, Hydrobiologia (574) 161-177
The distribution of bacterial and archaeal species in Crater Lake plankton varies dramatically over depth and with time, as assessed by hybridization of group-specific oligonucleotides to RNA extracted from lakewater. Nonmetric, multidimensional scaling (MDS) analysis of relative bacterial phylotype densities revealed complex relationships among assemblages sampled from depth profiles in...
Effects of aqueous exposure to polychlorinated biphenyls (Aroclor 1254) on physiology and behavior of smolt development of Atlantic salmon
D.T. Lerner, Bjorn Thrandur Bjornsson, S. D. McCormick
2007, Aquatic Toxicology (81) 329-336
Polychlorinated biphenyls (PCBs) are a widespread aquatic contaminant and are present in both wild and hatchery raised Atlantic salmon, Salmo salar. The possible sub-lethal alterations in smolt physiology and behavior due to PCB exposure of salmon have not been widely examined. In this study, we examined the effects of the...
Aquifer-scale controls on the distribution of nitrate and ammonium in ground water near La Pine, Oregon, USA
Stephen R. Hinkle, John Karl Bohlke, John H. Duff, David S. Morgan, Rodney J. Weick
2007, Journal of Hydrology (333) 486-503
Geochemical and isotopic tools were applied at aquifer, transect, and subtransect scales to provide a framework for understanding sources, transport, and fate of dissolved inorganic N in a sandy aquifer near La Pine, Oregon. NO3 is a common contaminant in shallow ground water in this area, whereas high concentrations of...
Rain-on-snow events in the western United States
G.J. McCabe, M.P. Clark, L.E. Hay
2007, Bulletin of the American Meteorological Society (88) 319-328
Rain-on-snow events pose a significant flood hazard in the western United States. This study provides a description of the spatial and temporal variability of the frequency of rain-on-snow events for 4318 sites in the western United States during water years (October through September) 1949-2003. Rain-on-snow events are found to be...
Nutrient vectors and riparian processing: A review with special reference to African semiarid savanna ecosystems
Shayne M. Jacobs, J.S. Bechtold, Harry C. Biggs, N. B. Grimm, S. Lorentz, M.E. McClain, R.J. Naiman, Steven S. Perakis, G. Pinay, M.C. Scholes
2007, Ecosystems (10) 1231-1249
This review article describes vectors for nitrogen and phosphorus delivery to riparian zones in semiarid African savannas, the processing of nutrients in the riparian zone and the effect of disturbance on these processes. Semiarid savannas exhibit sharp seasonality, complex hillslope hydrology and high spatial heterogeneity, all of which ultimately impact...
Upper triassic continental margin strata of the central alaska range: Implications for paleogeographic reconstruction
A.B. Till, A. G. Harris, B. R. Wardlaw, M. Mullen
2007, Special Paper of the Geological Society of America (431) 191-205
Remnants of a Late Triassic continental margin and ocean basin are scattered across central and southern Alaska. Little is known about the fundamental nature of the margin because most remnants have not been studied in detail and a protracted period of terrane accretion and margin-parallel translation has disrupted original...
Intertidal sand body migration along a megatidal coast, Kachemak Bay, Alaska
P.N. Adams, P. Ruggiero, G.C. Schoch, G. Gelfenbaum
2007, Journal of Geophysical Research F: Earth Surface (112)
[1] Using a digital video-based Argus Beach Monitoring System (ABMS) on the north shore of Kachemak Bay in south central Alaska, we document the timing and magnitude of alongshore migration of intertidal sand bed forms over a cobble substrate during a 22-month observation period. Two...
Recovery of three arctic stream reaches from experimental nutrient enrichment
J.P. Benstead, A.C. Green, Linda A. Deegan, B. J. Peterson, K. Slavik, W.B. Bowden, A.E. Hershey
2007, Freshwater Biology (52) 1077-1089
1. Nutrient enrichment and resulting eutrophication is a widespread anthropogenic influence on freshwater ecosystems, but recovery from nutrient enrichment is poorly understood, especially in stream environments. We examined multi-year patterns in community recovery from experimental low-concentration nutrient enrichment (N + P or P only) in three reaches of two Arctic...
Athabasca Valles, Mars: A lava-draped channel system
Windy L. Jaeger, Laszlo P. Keszthelyi, Alfred S. McEwen, Colin M. Dundas, Paul C. Russell
2007, Science (317) 1709-1711
Athabasca Valles is a young outflow channel system on Mars that may have been carved by catastrophic water floods. However, images acquired by the High-Resolution Imaging Science Experiment camera onboard the Mars Reconnaissance Orbiter spacecraft reveal that Athabasca Valles is now entirely draped by a thin layer of solidified lava...
Radium-226 accumulation in Florida freshwater mussels
M. Brenner, J.M. Smoak, D.A. Leeper, M. Streubert, S.M. Baker
2007, Limnology and Oceanography (52) 1614-1623
Selected lakes in Hillsborough County, Florida have been hydrologically augmented with groundwater to offset stage declines caused by excessive pumping of the Floridan Aquifer. Augmentation water can be relatively rich in 226Ra (>5 decays per minute [dpm] L-1). We measured 226Ra activities in shells and soft tissues of adult bivalve...
New 40Ar/39Ar age determinations and paleomagnetic results bearing on the tectonic and magmatic history of the northern Madison Range and Madison Valley region, southwestern Montana, U.S.A
K.S. Kellogg, S. S. Harlan
2007, Rocky Mountain Geology (42) 157-174
Detailed 40Ar/39Ar dating and paleomagnetic analysis of dacite porphyry sills and dikes that intrude Cretaceous sedimentary rocks in the northern Madison Range in southwestern Montana show that Laramide shortening was essentially complete by ???69 Ma. A negative paleomagnetic fold test indicates that Laramide folding occurred before cooling of the dacite...
A multiple-approach radiometric age estimate for the Rotoiti and Earthquake Flat eruptions, New Zealand, with implications for the MIS 4/3 boundary
C. J. N. Wilson, D.A. Rhoades, M. A. Lanphere, A.T. Calvert, Bruce F. Houghton, S.D. Weaver, J. W. Cole
2007, Quaternary Science Reviews (26) 1861-1870
Pyroclastic fall deposits of the paired Rotoiti and Earthquake Flat eruptions from the Taupo Volcanic Zone (New Zealand) combine to form a widespread isochronous horizon over much of northern New Zealand and the southwest Pacific. This horizon is important for correlating climatic and...
