Effects of flow diversions on water and habitat quality: Examples from California's highly manipulated Sacramento–San Joaquin Delta
Nancy E. Monsen, James E. Cloern, Jon R. Burau
2007, San Francisco Estuary and Watershed Science (5)
We use selected monitoring data to illustrate how localized water diversions from seasonal barriers, gate operations, and export pumps alter water quality across the Sacramento-San Joaquin Delta (California). Dynamics of water-quality variability are complex because the Delta is a mixing zone of water from the Sacramento and San Joaquin Rivers,...
New technologies at the Desert Research Institute make a difference in wildland fire management
Timothy J. Brown, Crystal A. Kolden
2007, Wildland Firefighter (11) 28-32
No abstract available....
Trends of brominated diphenyl ethers in fresh and archived Great Lakes fish (1979-2005)
Stuart Batterman, Sergei Chernyak, Erica Gwynn, David Cantonwine, Chunrong Jia, Linda J. Begnoche, James P. Hickey
2007, Chemosphere (69) 444-457
While few environmental measurements of brominated diphenyl ethers (BDEs) were completed prior to the mid-1990s, analysis of appropriately archived samples might enable the determination of contaminant trends back to the introduction of these chemicals. In this paper, we first investigate the stability of BDEs in archived frozen and extracted fish...
Dietary and spatial overlap between sympatric ursids relative to salmon use
Jennifer K. Fortin, Sean D. Farley, Karyn D. Rode, Charles T. Robbins
2007, Ursus (18) 19-29
We hypothesized that there would be minimal dietary overlap between sympatric brown bears (Ursus arctos) and American black bears (U. americanus) relative to salmon (Oncorhynchus spp.) utilization when alternative foods (e.g., fruits) are abundant. To maximize the chance that we would reject this hypothesis, we examined the diets of brown and black...
Geologic map of the Siksikpuk River area, Chandler Lake quadrangle, Alaska
P.R. Peapples, W. K. Wallace, Marwan A. Wartes, R.F. Swenson, C. G. Mull, Julie A. Dumoulin, E. E. Harris, E.S. Finzel, R.R. Reifenstuhl, A.M. Loveland
2007, Report
Fire risk in San Diego County, California: A weighted Bayesian model approach
Crystal A. Kolden, Timothy J. Weigel
2007, California Geographer (47) 42-60
Fire risk models are widely utilized to mitigate wildfire hazards, but models are often based on expert opinions of less understood fire-ignition and spread processes. In this study, we used an empirically derived weights-of-evidence model to assess what factors produce fire ignitions east of San Diego, California. We created and...
Estuarine response in northeastern Florida Bay to major hurricanes in 2005
Jeff Woods, Mark Zucker
2007, Circular 1306-6I
Hurricanes and tropical storms are critical components of the south Florida hydrologic cycle. These storms cause dramatic and often rapid changes in water level of, salinity of, and discharge into northeastern Florida Bay as well as into adjacent marine estuaries. During 2005, two major hurricanes (Katrina and Wilma) crossed the...
Adjusting for telemetry bias in behavior data
Mark S. Udevitz, Chadwick V. Jay, Anthony S. Fischbach, Joel L. Garlich-Miller
2007, Conference Paper, Proceedings of the Annual Meeting of the Alaska Chapter of the American Statistical Association
No abstract available. ...
Broad-scale response of landbird migration to the immediate effects of Hurricane Katrina
Wylie Barrow Jr., J. Buler, Brady R. Couvillion, Robb Diehl, Stephen Faulkner, F. Moore, Lori Randall
2007, Circular 1306-6B
It was the midst of songbird migration season when Hurricane Katrina hit the Louisiana coast in 2005. Typically these birds fatten up in Gulf Coast river bottomland forest for the long flight to Central and South America. After Katrina stripped plants of leaves, fruits, and insects in the fertile bottomlands...
Using geospatial technology to process 911 calls after Hurricanes Katrina and Rita
Craig P. Conzelmann, William Sleavin, Brady R. Couvillion
2007, Circular 1306-3B
The flooding that ensued in the Greater New Orleans area after Hurricane Katrina left thousands of victims trapped and in need of emergency rescue. This paper describes the processing of raw 911-call data into search and rescue products used by emergency responders after the storm....
Efficiently estimating salmon escapement uncertainty using systematically sampled data
Joel H. Reynolds, Carol Ann Woody, Nancy E. Gove, Lowell F. Fair
2007, American Fisheries Society Symposium (54) 121-129
Fish escapement is generally monitored using nonreplicated systematic sampling designs (e.g., via visual counts from towers or hydroacoustic counts). These sampling designs support a variety of methods for estimating the variance of the total escapement. Unfortunately, all the methods give biased results, with the magnitude of the bias being determined...
Hurricane Katrina flooding and oil slicks mapped with satellite imagery
Russell P. Rykhus, Zhong Lu
2007, Circular 1306-3F
A multiple-database approach that combined remotely sensed data from Radarsat-1 and Landsat Thematic Mapper Plus (ETM+) imagery was used to map Hurricane Katrinainduced flooding and to identify offshore oil slicks. Maps depicting the areal extent of flooding, oil slicks, and floating debris provide vital information to emergency managers for directing...
Assessment of marine-derived nutrients in the Copper River Delta, Alaska, using natural abundance of the stable isotopes of nitrogen, sulfur, and carbon
Thomas C. Kline, Carol Ann Woody, Mary Anne Bishop, Sean P. Powers, E. Eric Knudsen
2007, American Fisheries Society Symposium (54) 51-60
We performed nitrogen, sulfur, and carbon stable isotope analysis (SIA) on maturing and juvenile anadromous sockeye and coho salmon, and periphyton in two Copper River delta watersheds of Alaska to trace salmonderived nutrients during 2003–2004. Maturing salmon were isotopically enriched relative to alternate freshwater N, S, and C sources as...
Estimation of post-Katrina debris volume
Mark Hansen, Peter Howd, Asbury Sallenger, C. Wayne Wright, Jeff Lillycrop
2007, Circular 1306-3E
Hurricane Katrina severely impacted coastal Mississippi, creating large quantities of building and vegetation debris. This paper summarizes techniques to estimate vegetation and nonvegetation debris quantities from light detection and ranging (lidar) data and presents debris volume results for Harrison County, Miss....
Concordance of nuclear and mitochondrial DNA markers in detecting a founder event in Lake Clark sockeye salmon
Kristina M. Ramstad, Carol Ann Woody, Chris Habicht, G. Kevin Sage, James E. Seeb, Fred W. Allendorf
2007, American Fisheries Society Symposium (54) 31-50
Genetic bottleneck effects can reduce genetic variation, persistence probability, and evolutionary potential of populations. Previous microsatellite analysis suggested a bottleneck associated with a common founding of sock-eye salmon Oncorhynchus nerka populations of Lake Clark, Alaska, about 100 to 400 generations ago. The common foundingevent occurred after the last glacial recession...
Signatures of mountain building: Detrital zircon U/Pb ages from northeast Tibet
Richard O. Lease, Douglas W. Burbank, George E. Gehrels, Zhicai Wang, Daoyang Yuan
2007, Geology (35) 239-242
Although detrital zircon has proven to be a powerful tool for determining provenance, past work has focused primarily on delimiting regional source terranes. Here we explore the limits of spatial resolution and stratigraphic sensitivity of detrital zircon in ascertaining provenance, and we demonstrate its ability to detect source changes for...
Wind damage and salinity effects of Hurricanes Katrina and Rita on coastal baldcypress forests of Louisiana
Thomas W. Doyle, William H. Conner, Richard H. Day, Ken W. Krauss, Christopher M. Swarzenski
2007, Circular 1306-6F
The frequency of hurricane landfall in a given coastal stretch may play a more important role in the ecology of coastal forests than previously thought because of direct and indirect impacts of fallen trees and the introduction of salt water that lingers long after the storm passes. Findings show that...
Heterogeneity of soil nutrients and subsurface biota in a dryland ecosystem
D.C. Housman, C.M. Yeager, B.J. Darby, R.L. Sanford Jr., C.R. Kuske, D.A. Neher, J. Belnap
2007, Soil Biology and Biochemistry (39) 2138-2149
Dryland ecosystems have long been considered to have a highly heterogeneous distribution of nutrients and soil biota, with greater concentrations of both in soils under plants relative to interspace soils. We examined the distribution of soil resources in two plant communities (dominated by either the shrub Coleogyne ramosissima or the...
Population estimates of Hyla cinerea (Schneider) (Green Tree frog) in an urban environment
L. Pham, S. Boudreaux, S. Karhbet, B. Price, A. S. Ackleh, J. Carter, N. Pal
2007, Southeastern Naturalist (6) 203-216
Hyla cinerea (Green Treefrog) is a common wetlands species in the southeastern US. To better understand its population dynamics, we followed a relatively isolated population of Green Treefrogs from June 2004 through October 2004 at a federal office complex in Lafayette, LA. Weekly, Green Treefrogs were caught, measured, marked with...
Alternative community structures in a kelp-urchin community: A qualitative modeling approach
G. Montano-Moctezuma, H.W. Li, P.A. Rossignol
2007, Ecological Modelling (205) 343-354
Shifts in interaction patterns within a community may result from periodic disturbances and climate. The question arises as to the extent and significance of these shifting patterns. Using a novel approach to link qualitative mathematical models and field data, namely using the inverse matrix to identify the community matrix, we...
Bacteriological water quality in and around Lake Pontchartrain following Hurricanes Katrina and Rita
Dennis K. Demcheck, Donald M. Stoeckel, Rebecca N. Bushon, David S. Blehert, Daniel J. Hippe
2007, Circular 1306-7H
Following the Louisiana landfalls of Katrina on August 29 and Rita on September 24, 2005, the local population and the American public were concerned about the effects the hurricanes might have on water quality in Lake Pontchartrain. The lake is a major recreational resource for the region and an important...
Effects of Hurricanes Katrina and Rita on the chemistry of bottom sediments in Lake Pontchartrain, La.
Peter C. Van Metre, Arthur J. Horowitz, Barbara Mahler, William T. Foreman, Christopher C. Fuller, Mark R. Burkhardt, Kent A. Elrick, Edward T. Furlong, Stanley C. Skrobialowski, James J. Smith, Jennifer T. Wilson, Stephen D. Zaugg
2007, Circular 1306-7F
Concerns about the effect of pumping contaminated flood waters into Lake Pontchartrain following the hurricanes of 2005 prompted the U.S. Geological Survey (USGS) to sample street mud, canal-suspended sediment, and bottom sediment in Lake Pontchartain. The samples were analyzed for a wide variety of potential inorganic and organic contaminants. Results...
Cheniere forest as stopover habitat for migrant landbirds: Immediate effects of Hurricane Rita
Wylie Barrow Jr., Paul Chadwick, Brady R. Couvillion, Thomas Doyle, Stephen Faulkner, Clint Jeske, Tommy Michot, Lori Randall, Chris Wells, Scott Wilson
2007, Circular 1306-6D
It is not known whether en route fall migratory birds (August-October) are likely to suffer more from direct or secondary effects of hurricanes. On September 24, 2005, Hurricane Rita wreaked havoc on Louisiana's coast by toppling trees over vast areas and by stripping away microhabitats that harbor the invertebrates and...
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...
Direct and indirect estimates of natural mortality for Chesapeake Bay blue crab
D.A. Hewitt, D.M. Lambert, J.M. Hoenig, Romuald N. Lipcius, D.B. Bunnell, T.J. Miller
2007, Transactions of the American Fisheries Society (136) 1030-1040
Analyses of the population dynamics of blue crab Callinectes sapidus have been complicated by a lack of estimates of the instantaneous natural mortality rate (M). We developed the first direct estimates of M for this species by solving Baranov's catch equation for M given estimates of annual survival rate and exploitation rate. Annual survival rates were...
