Breeding-season sympatry facilitates genetic exchange among allopatric wintering populations of Northern Pintails in Japan and California
Paul L. Flint, Kiyoaki Ozaki, John M. Pearce, Brian Guzzetti, Hiroyoshi Higuchi, Joseph P. Fleskes, Tetsuo Shimada, Dirk V. Derksen
2009, Condor (111) 591-598
The global redistribution of pathogens, such as highly pathogenic avian influenza, has renewed interest in the connectivity of continental populations of birds. Populations of the Northern Pintail (Anas acuta) wintering in Japan and California are considered separate from a management perspective. We used data from band recoveries and population genetics...
Late Quaternary sediment-accumulation rates within the inner basins of the California Continental Borderland in support of geologic hazard evaluation
W. R. Normark, M. McGann, R. W. Sliter
2009, Special Paper of the Geological Society of America 117-139
An evaluation of the geologic hazards of the inner California Borderland requires determination of the timing for faulting and mass-movement episodes during the Holocene. Our effort focused on basin slopes and turbidite systems on the basin floors for the area between Santa Barbara and San Diego, California. Dating condensed sections...
Pollen-based biome reconstructions for Latin America at 0, 6000 and 18 000 radiocarbon years ago
R. Marchant, A. Cleef, S. P. Harrison, H. Hooghiemstra, Vera Markgraf, J. Van Boxel, T. Ager, L. Almeida, R. Anderson, C. Baied, H. Behling, J. C. Berrio, R. Burbridge, S. Bjorck, R. Byrne, M. Bush, J. Duivenvoorden, J. Flenley, P. De Oliveira, B. Van Gee, K. Graf, W. D. Gosling, S. Harbele, T. Van Der Hammen, B. Hansen, S. Horn, P. Kuhry, M.-P. Ledru, F. Mayle, B. Leyden, S. Lozano-Garcia, A. M. Melief, P. Moreno, N. T. Moar, A. Prieto, G. Van Reenen, F. Schabitz, M. Salgado-Labouriau, E. J. Schreve-Brinkman, M. Wille
2009, Climate of the Past (5) 725-767
The biomisation method is used to reconstruct Latin American vegetation at 6000±500 and 18 000±1000 radiocarbon years before present (14C yr BP) from pollen data. Tests using modern pollen data from 381 samples derived from 287 locations broadly reproduce potential natural vegetation. The strong temperature gradient associated with the Andes...
Age-distribution estimation for karst groundwater: Issues of parameterization and complexity in inverse modeling by convolution
Andrew J. Long, L.D. Putnam
2009, Journal of Hydrology (376) 579-588
Convolution modeling is useful for investigating the temporal distribution of groundwater age based on environmental tracers. The framework of a quasi-transient convolution model that is applicable to two-domain flow in karst aquifers is presented. The model was designed to provide an acceptable level of statistical confidence in parameter estimates when...
Invasive species information networks: Collaboration at multiple scales for prevention, early detection, and rapid response to invasive alien species
Annie Simpson, Catherine S. Jarnevich, John Madsen, Randy G. Westbrooks, Christine Fournier, Les Mehrhoff, Michael Browne, Jim Graham, Elizabeth A. Sellers
2009, Biodiversity (10) 5-13
Accurate analysis of present distributions and effective modeling of future distributions of invasive alien species (IAS) are both highly dependent on the availability and accessibility of occurrence data and natural history information about the species. Invasive alien species monitoring and detection networks (such as the Invasive Plant Atlas of New...
Assessment of lake sensitivity to acidic deposition in national parks of the Rocky Mountains
L. Nanus, M.W. Williams, K. Campbell, K.A. Tonnessen, T. Blett, D. W. Clow
2009, Ecological Applications (19) 961-973
The sensitivity of high-elevation lakes to acidic deposition was evaluated in five national parks of the Rocky Mountains based on statistical relations between lake acid-neutralizing capacity concentrations and basin characteristics. Acid-neutralizing capacity (ANC) of 151 lakes sampled during synoptic surveys and basin-characteristic information derived from geographic information system (GIS) data...
A multiscale analysis of coral reef topographic complexity using lidar-derived bathymetry
D.G. Zawada, J. C. Brock
2009, Journal of Coastal Research 6-15
Coral reefs represent one of the most irregular substrates in the marine environment. This roughness or topographic complexity is an important structural characteristic of reef habitats that affects a number of ecological and environmental attributes, including species diversity and water circulation. Little is known about the range of topographic complexity...
Integrating disparate lidar datasets for a regional storm tide inundation analysis of Hurricane Katrina
Jason M. Stoker, Dean J. Tyler, D. Phil Turnipseed, K. Van Wilson Jr., Michael J. Oimoen
2009, Journal of Coastal Research (Special Issue 53) 66-72
Hurricane Katrina was one of the largest natural disasters in U.S. history. Due to the sheer size of the affected areas, an unprecedented regional analysis at very high resolution and accuracy was needed to properly quantify and understand the effects of the hurricane and the storm tide. Many disparate sources...
Adaptation of farming practices could buffer effects of climate change on northern prairie wetlands
R.A. Voldseth, W.C. Johnson, G.R. Guntenspergen, T. Gilmanov, B.V. Millett
2009, Wetlands (29) 635-647
Wetlands of the Prairie Pothole Region of North America are vulnerable to climate change. Adaptation of farming practices to mitigate adverse impacts of climate change on wetland water levels is a potential watershed management option. We chose a modeling approach (WETSIM 3.2) to examine the effects of changes in climate...
Physical property data from the ICDP-USGS Eyreville cores A and B, Chesapeake Bay impact structure, Virginia, USA, acquired using a multisensor core logger
H. A. Pierce, J.B. Murray
2009, Special Paper of the Geological Society of America 165-179
The International Continental Scientific Drilling Program (ICDP) and the U.S. Geological Survey (USGS) drilled three core holes to a composite depth of 1766 m within the moat of the Chesapeake Bay impact structure. Core recovery rates from the drilling were high (??90%), but problems with core hole collapse limited the...
Characteristics of Southern California coastal aquifer systems
B. D. Edwards, R. T. Hanson, E.G. Reichard, T.A. Johnson
2009, Special Paper of the Geological Society of America 319-344
Most groundwater produced within coastal Southern California occurs within three main types of siliciclastic basins: (1) deep (>600 m), elongate basins of the Transverse Ranges Physiographic Province, where basin axes and related fluvial systems strike parallel to tectonic structure, (2) deep (>6000 m), broad basins of the Los Angeles and...
Mesohaline submerged aquatic vegetation survey along the U.S. gulf of Mexico coast, 2000: A stratified random approach
J. Carter, J.H. Merino, S.L. Merino
2009, Gulf of Mexico Science (27) 1-8
Estimates of submerged aquatic vegetative (SAV) along the U.S. Gulf of Mexico (Gulf) generally focus on seagrasses. In 2000, we attempted a synoptic survey of SAV in the mesohaline (5–20 ppt) zone of estuarine and nearshore areas of the northeastern Gulf. Areas with SAV were identified from existing aerial 1992...
Hydrogeologic structure underlying a recharge pond delineated with shear-wave seismic reflection and cone penetrometer data
S.S. Haines, Adam Pidlisecky, R. Knight
2009, Near Surface Geophysics (7) 329-339
With the goal of improving the understanding of the subsurface structure beneath the Harkins Slough recharge pond in Pajaro Valley, California, USA, we have undertaken a multimodal approach to develop a robust velocity model to yield an accurate seismic reflection section. Our shear-wave reflection section helps us identify and map...
The relative importance of disturbance and exotic-plant abundance in California coastal sage scrub
G.M. Fleming, J.E. Diffendorfer, P.H. Zedler
2009, Ecological Applications (19) 2210-2227
Many ecosystems of conservation concern require some level of disturbance to sustain their species composition and ecological function. However, inappropriate disturbance regimes could favor invasion or expansion of exotic species. In southern California coastal sage scrub (CSS) fire is a natural disturbance, but because of human influence, frequencies may now...
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...
Lysimetric evaluation of simplified surface energy balance approach in the Texas high plains
P.H. Gowda, G.B. Senay, T.A. Howell, T.H. Marek
2009, Applied Engineering in Agriculture (25) 665-669
Numerous energy balance (EB) algorithms have been developed to make use of remote sensing data to estimate evapotranspiration (ET) regionally. However, most EB models are complex to use and efforts are being made to simplify procedures mainly through the scaling of reference ET. The Simplified Surface Energy Balance (SSEB) is...
Advancing landscape change research through the incorporation of Inupiaq knowledge
Wendy R. Eisner, Chris J. Cuomo, Kenneth M. Hinkel, Benjamin M. Jones, Ronald H. Brower Sr.
2009, Arctic (62) 429-442
Indigenous knowledge is a valuable but under-used source of information relevant to landscape change research. We interviewed Iñupiat elders, hunters, and other knowledge-holders in the villages of Barrow and Atqasuk on the western Arctic Coastal Plain of northern Alaska to gain further insight into the processes governing the ubiquitous lakes...
Satellite optical and radar data used to track wetland forest impact and short-term recovery from Hurricane Katrina
Elijah W. Ramsey III, A. Rangoonwala, B. Middleton, Z. Lu
2009, Wetlands (29) 66-79
Satellite Landsat Thematic Mapper (TM) and RADARSAT-1 (radar) satellite image data collected before and after the landfall of Hurricane Katrina in the Pearl River Wildlife Management Area on the Louisiana-Mississippi border, USA, were applied to the study of forested wetland impact and recovery. We documented the overall similarity in the...
Design of smart sensing components for volcano monitoring
M. Xu, W.-Z. Song, R. Huang, Y. Peng, B. Shirazi, R. LaHusen, A. Kiely, N. Peterson, A. Ma, L. Anusuya-Rangappa, M. Miceli, D. McBride
2009, Pervasive and Mobile Computing (5) 639-653
In a volcano monitoring application, various geophysical and geochemical sensors generate continuous high-fidelity data, and there is a compelling need for real-time raw data for volcano eruption prediction research. It requires the network to support network synchronized sampling, online configurable sensing and situation awareness, which pose significant challenges on sensing...
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...
Timing of breeding and reproductive performance in murres and kittiwakes reflect mismatched seasonal prey dynamics
M.T. Shultz, John F. Piatt, A.M.A. Harding, Arthur B. Kettle, Thomas I. van Pelt
2009, Marine Ecology Progress Series (393) 247-258
Seabirds are thought to time breeding to match the seasonal peak of food availability with peak chick energetic demands, but warming ocean temperatures have altered the timing of spring events, creating the potential for mismatches. The resilience of seabird populations to climate change depends on their ability to anticipate changes...
Foraminiferal assemblages in Biscayne Bay, Florida, USA: Responses to urban and agricultural influence in a subtropical estuary
E. A. Carnahan, A.M. Hoare, P. Hallock, B. H. Lidz, C. D. Reich
2009, Marine Pollution Bulletin (59) 221-233
This study assessed foraminiferal assemblages in Biscayne Bay, Florida, a heavily utilized estuary, interpreting changes over the past 65 years and providing a baseline for future comparisons. Analyses of foraminiferal data at the genus level revealed three distinct biotopes. The assemblage from the northern bay was characterized by stress-tolerant taxa, especially Ammonia,...
Comparison with CLPX II airborne data using DMRT model
X. Xu, D. Liang, K.M. Andreadis, L. Tsang, E.G. Josberger
2009, Conference Paper, International Geoscience and Remote Sensing Symposium (IGARSS)
In this paper, we considered a physical-based model which use numerical solution of Maxwell Equations in three-dimensional simulations and apply into Dense Media Radiative Theory (DMRT). The model is validated in two specific dataset from the second Cold Land Processes Experiment (CLPX II) at Alaska and Colorado. The data were...
Improving accessibility to geospatial data using geographic search
J.E. Williams, M.L. Allison, J.B. Kozman
2009, Conference Paper, 2009 17th International Conference on Geoinformatics, Geoinformatics 2009
[No abstract available]...
Pliocene three-dimensional global ocean temperature reconstruction
H.J. Dowsett, M.M. Robinson, K.M. Foley
2009, Climate of the Past (5) 769-783
The thermal structure of the mid-Piacenzian ocean is obtained by combining the Pliocene Research, Interpretation and Synoptic Mapping Project (PRISM3) multiproxy sea-surface temperature (SST) reconstruction with bottom water temperature estimates from 27 locations produced using Mg/Ca paleothermometry based upon the ostracod genus Krithe. Deep water temperature estimates are skewed toward...
