Migration of waterfowl in the east asian flyway and spatial relationship to HPAI H5N1 outbreaks
John Y. Takekawa, S. H. Newman, X. Xiao, D.J. Prosser, K.A. Spragens, E.C. Palm, B. Yan, T. Li, F. Lei, D. Zhao, David C. Douglas, S.B. Muzaffar, W. Ji
2010, Avian Diseases (54) 466-476
Poyang Lake is situated within the East Asian Flyway, a migratory corridor for waterfowl that also encompasses Guangdong Province, China, the epicenter of highly pathogenic avian influenza (HPAI) H5N1. The lake is the largest freshwater body in China and a significant congregation site for waterfowl; however, surrounding rice fields and...
The relative influence of nutrients and habitat on stream metabolism in agricultural streams
J.D. Frankforter, H.S. Weyers, J. D. Bales, P.W. Moran, D.L. Calhoun
2010, Environmental Monitoring and Assessment (168) 461-479
Stream metabolism was measured in 33 streams across a gradient of nutrient concentrations in four agricultural areas of the USA to determine the relative influence of nutrient concentrations and habitat on primary production (GPP) and respiration (CR-24). In conjunction with the stream metabolism estimates, water quality and algal biomass samples...
Stress response of brown pelican nestlings to ectoparasite infestation
L.M.F. Eggert, P.G.R. Jodice, K. M. O’Reilly
2010, General and Comparative Endocrinology (166) 33-38
Measurement of corticosterone has become a useful tool for assessing the response of individuals to ecological stressors of interest. Enhanced corticosterone levels can promote survival of stressful events; however, in situations where a stressor persists and corticosterone levels remain elevated, the adrenocortical response can be detrimental. A potential ecological stressor...
Phylogeography of wolves (Canis lupus) in the Pacific Northwest
Byron V. Weckworth, Sandra L. Talbot, Joseph A. Cook
2010, Journal of Mammalogy (91) 363-375
Glacial cycles in the late Pleistocene played a dominant role in sculpting the evolutionary histories of many high-latitude organisms. The refugial hypothesis argues that populations retracted during glacial maxima and were isolated in separate refugia. One prediction of this hypothesis is that populations inhabiting different refugia diverged and then, during...
Using chloride and other ions to trace sewage and road salt in the Illinois Waterway
W.R. Kelly, S.V. Panno, Keith C. Hackley, H.-H. Hwang, A.T. Martinsek, M. Markus
2010, Applied Geochemistry (25) 661-673
Chloride concentrations in waterways of northern USA are increasing at alarming rates and road salt is commonly assumed to be the cause. However, there are additional sources of Cl- in metropolitan areas, such as treated wastewater (TWW) and water conditioning salts, which may be contributing to Cl- loads entering surface...
11-Deoxycortisol is a corticosteroid hormone in the lamprey
D.A. Close, S.-S. Yun, S. D. McCormick, A.J. Wildbill, W. Li
2010, Proceedings of the National Academy of Sciences of the United States of America (107) 13942-13947
Corticosteroid hormones are critical for controlling metabolism, hydromineral balance, and the stress response in vertebrates. Although corticosteroid hormones have been well characterized in most vertebrate groups, the identity of the earliest vertebrate corticosteroid hormone has remained elusive. Here we provide evidence that 11-deoxycortisol is the corticosteroid hormone in the lamprey,...
Hepatic pathologies in the brackish water catfish (Chrysichthys nigrodigitatus) from contaminated locations of the Lagos lagoon complex
O. Olarinmoye, V. Taiwo, E. Clarke, C. Kumolu-Johnson, O. Aderinola, F. Adekunbi
2010, Applied Ecology and Environmental Research (7) 277-286
Several toxicological studies into the effects of aquatic pollutants on the liver of teleost fish exist in literature. The focus on the liver in these studies is predicated on its central nature in the scheme of biotransformation and excretion of xenobiotics following exposure in polluted water bodies. As a consequence...
Metrics of ecosystem status for large aquatic systems: a global comparison
N.E. Dobiesz, R.E. Hecky, T.B. Johnson, J. Sarvala, J.M. Dettmers, M. Lehtiniemi, L. G. Rudstam, C.P. Madenjian, F. Witte
2010, Journal of Great Lakes Research (36) 123-138
We identified an objective set of 25 commonly available ecosystem metrics applicable across the world's large continental freshwater and brackish aquatic ecosystem. These metrics measure trophic structure, exploited species, habitat alteration, and catchment changes. We used long-term trends in these metrics as indicators of perturbations that represent an ecosystem not...
Trace elements have limited utility for studying migratory connectivity in shorebirds that winter in Argentina
J. Torres-Dowdall, A.H. Farmer, M. Abril, E.H. Bucher, I. Ridley
2010, Condor (112) 490-498
Trace-element analysis has been suggested as a tool for the study of migratory connectivity because (1) trace-element abundance varies spatially in the environment, (2) trace elements are assimilated into animals' tissues through the diet, and (3) current technology permits the analysis of multiple trace elements in a small tissue sample,...
Mussel remains from prehistoric salt works, clarke county, Alabama
S.W. McGregor, A.A. Dumas
2010, Southeastern Naturalist (9) 105-118
Archaeological research at salt springs in Clarke County, AL (Tombigbee River drainage), documented bivalve mollusk exploitation by late prehistoric American Indians. A total of 582 valves representing 19 species of freshwater mussels (Unionidae) and an estuarine clam (Mactridae) from the Lower Salt Works Site (ca. A.D. 900-1550) and 41 valve...
Active shoreline of Ontario Lacus, Titan: A morphological study of the lake and its surroundings
S. Wall, A. Hayes, C. Bristow, R. Lorenz, E. Stofan, J. Lunine, Gall A. Le, M. Janssen, R. Lopes, L. Wye, L. Soderblom, P. Paillou, O. Aharonson, H. Zebker, Tom Farr, Giuseppe Mitri, R. Kirk, Ken Mitchell, C. Notarnicola, D. Casarano, B. Ventura
2010, Geophysical Research Letters (37)
Of more than 400 filled lakes now identified on Titan, the first and largest reported in the southern latitudes is Ontario Lacus, which is dark in both infrared and microwave. Here we describe recent observations including synthetic aperture radar (SAR) images by Cassini's radar instrument (??= 2 cm) and show...
Common clay and shale: a look at 2009 activity
R.L. Virta
2010, Mining Engineering (62) 37-38
An overview of clay and shale production, consumption, and prices in 2009 is presented. The industry has seen 15 to 20 percent declines during the past two years, yet producers still expect sales to decline in 2010....
Post-eruption legacy effects and their implications for long-term recovery of the vegetation on Kasatochi Island, Alaska
Stephen S. Talbot, Sandra Looman Talbot, Lawrence R. Walker
2010, Arctic, Antarctic, and Alpine Research (42) 285-296
We studied the vegetation of Kasatochi Island, central Aleutian Islands, to provide a general field assessment regarding the survival of plants, lichens, and fungi following a destructive volcanic eruption that occurred in 2008. Plant community data were analyzed using multivariate methods to explore the relationship between pre- and post-eruption plant...
A complex-systems approach to predicting effects of sea level rise and nitrogen loading on nitrogen cycling in coastal wetland ecosystems
Laurel G. Larsen, Serena Moseman, Alyson Santoro, Kristine Hopfensperger, Amy Burgin
2010, Book chapter, Eco-DAS VIII Symposium Proceedings
To effectively manage coastal ecosystems, we need an improvedunderstanding of how tidal marsh ecosystem services will respond to sea-level rise and increased nitrogen (N) loading to coastal areas. Here we review existing literature to better understand how these interacting perturbations s will likely impact N removal by tidal marshes. We...
Predictive modeling of transient storage and nutrient uptake: Implications for stream restoration
Ben L. O’Connor, Miki Hondzo, Judson W. Harvey
2010, Journal of Hydraulic Engineering (136) 1018-1032
This study examined two key aspects of reactive transport modeling for stream restoration purposes: the accuracy of the nutrient spiraling and transient storage models for quantifying reach-scale nutrient uptake, and the ability to quantify transport parameters using measurements and scaling techniques in order to improve upon traditional conservative tracer fitting...
The cleaning of burned and contaminated archaeological maize prior to 87Sr/86Sr analysis
Larry V. Benson, Howard E. Taylor, Terry I. Plowman, David A. Roth, Ronald C. Antweiler
2010, Journal of Archaeological Science (37) 84-91
Accurate trace-metal and strontium-isotope analyses of archaeological corn cobs require that metal contaminants be removed prior to chemical analysis. Archaeological cobs are often coated with construction debris, dust, or soil which contains mineral particles. In addition, most archaeological cobs are partially or completely burned and the burned parts incorporate mineral...
Three-dimensional benchmark for variable-density flow and transport simulation: matching semi-analytic stability modes for steady unstable convection in an inclined porous box
Clifford I. Voss, Craig T. Simmons, Neville I. Robinson
2010, Hydrogeology Journal (18) 5-23
This benchmark for three-dimensional (3D) numerical simulators of variable-density groundwater flow and solute or energy transport consists of matching simulation results with the semi-analytical solution for the transition from one steady-state convective mode to another in a porous box. Previous experimental and analytical studies of natural convective flow in an...
Habitat suitability and conservation of the Giant Gartersnake (Thamnophis gigas) in the Sacramento Valley of California
B.J. Halstead, G.D. Wylie, Michael L. Casazza
2010, Copeia 591-599
Resource managers often have little information regarding the habitat requirements and distribution of rare species. Factor analysis-based habitat suitability models describe the ecological niche of a species and identify locations where these conditions occur on the landscape using existing occurrence data. We used factor analyses to assess the suitability of...
The persistence of endangered Florida Salt Marsh Voles in salt marshes of the central Florida Gulf Coast
A.S. Hotaling, H.F. Percival, W.M. Kitchens, J.W. Kasbohm
2010, Southeastern Naturalist (9) 795-802
Two endangered Microtus pennsylvanicus dukecampbelli (Florida Salt Marsh Vole) were captured at a new location, in February of 2009, at Lower Suwannee National Wildlife Refuge. Since the species discovery in 1979, only 43 Florida Salt Marsh Voles (hereafter FSM Vole) have been captured. Outside of the type locality, this is...
The combined influence of sub-optimal temperature and salinity on the in vitro viability of Perkinsus marinus, a protistan parasite of the eastern oyster Crassostrea virginica
M.K. La Peyre, S.M. Casas, W. Gayle, Jerome F. La Peyre
2010, Journal of Invertebrate Pathology (105) 176-181
Perkinsus marinus is a major cause of mortality in eastern oysters along the Gulf of Mexico and Atlantic coasts. It is also well documented that temperature and salinity are the primary environmental factors affecting P. marinus viability and proliferation. However, little is known about the effects of combined sub-optimal temperatures...
Beaver dams, hydrological thresholds, and controlled floods as a management tool in a desert riverine ecosystem, Bill Williams River, Arizona
D.C. Andersen, P.B. Shafroth
2010, Ecohydrology (3) 325-338
Beaver convert lotic stream habitat to lentic through dam construction, and the process is reversed when a flood or other event causes dam failure. We investigated both processes on a regulated Sonoran Desert stream, using the criterion that average current velocity is < 0.2 m s-1 in a lentic reach....
Accuracy of gap analysis habitat models in predicting physical features for wildlife-habitat associations in the southwest U.S.
K.G. Boykin, B.C. Thompson, S. Propeck-Gray
2010, Ecological Modelling (221) 2769-2775
Despite widespread and long-standing efforts to model wildlife-habitat associations using remotely sensed and other spatially explicit data, there are relatively few evaluations of the performance of variables included in predictive models relative to actual features on the landscape. As part of the National Gap Analysis Program, we specifically examined physical...
Occurrence of West Nile virus infection in raptors at the Salton Sea, California
Robert J. Dusek, William M. Iko, Erik K. Hofmeister
2010, Journal of Wildlife Diseases (46) 889-895
We investigated the prevalence of West Nile virus (WNV)-neutralizing antibodies and infectious virus, and the occurrence of overwinter transmission in two raptor species during January and March 2006 at the Salton Sea, Imperial County, California. We captured 208 American Kestrels (Falco sparverius) (January, n=100; March, n=108) and 116 Burrowing Owls (Athene cunicularia)...
Teaching citizen science skills online: Implications for invasive species training programs
G. Newman, A. Crall, M. Laituri, J. Graham, T. Stohlgren, J.C. Moore, K. Kodrich, K.A. Holfelder
2010, Applied Environmental Education and Communication (9) 276-286
Citizen science programs are emerging as an efficient way to increase data collection and help monitor invasive species. Effective invasive species monitoring requires rigid data quality assurances if expensive control efforts are to be guided by volunteer data. To achieve data quality, effective online training is needed to improve field...
Broadband ground-motion simulation using a hybrid approach
R.W. Graves, A. Pitarka
2010, Bulletin of the Seismological Society of America (100) 2095-2123
This paper describes refinements to the hybrid broadband ground-motion simulation methodology of Graves and Pitarka (2004), which combines a deterministic approach at low frequencies (f 1 Hz). In our approach, fault rupture is represented kinematically and incorporates spatial heterogeneity in...
