A new reconstruction of the Paleozoic continental margin of southwestern North America: Implications for the nature and timing of continental truncation and the possible role of the Mojave-Sonora megashear
C.H. Stevens, P. Stone, J.S. Miller
2005, Special Paper of the Geological Society of America 597-618
Data bearing on interpretations of the Paleozoic and Mesozoic paleogeography of southwestern North America are important for testing the hypothesis that the Paleozoic miogeocline in this region has been tectonically truncated, and if so, for ascertaining the time of the event and the possible role of the Mojave-Sonora megashear. Here,...
Efficacy of using radio transmitters to monitor least tern chicks
Joanna B. Whittier, David M. Leslie Jr.
2005, The Wilson Bulletin (117) 85-91
Little is known about Least Tern (Sterna antillarum) chicks from the time they leave the nest until fledging because they are highly mobile and cryptically colored. We evaluated the efficacy of using radiotelemetry to monitor Interior Least Tern (S. a. athalassos) chicks at Salt Plains National Wildlife Refuge, Oklahoma. In...
Nonlinear dynamics in ecosystem response to climatic change: Case studies and policy implications
Virginia R. Burkett, Douglas A. Wilcox, Robert Stottlemyer, Wylie Barrow, Dan Fagre, Jill Baron, Jeff Price, Jennifer L. Nielsen, Craig D. Allen, David L. Peterson, Greg Ruggerone, Thomas Doyle
2005, Ecological Complexity (2) 357-394
Many biological, hydrological, and geological processes are interactively linked in ecosystems. These ecological phenomena normally vary within bounded ranges, but rapid, nonlinear changes to markedly different conditions can be triggered by even small differences if threshold values are exceeded. Intrinsic and extrinsic ecological thresholds can lead to effects that cascade...
Middle Jurassic Topawa group, Baboquivari Mountains, south-central Arizona: Volcanic and sedimentary record of deep basins within the Jurassic magmatic arc
G. B. Haxel, J.E. Wright, N. R. Riggs, R. M. Tosdal, D. J. May
2005, Special Paper of the Geological Society of America 329-357
Among supracrustal sequences of the Jurassic magmatic arc of the southwestern Cordillera, the Middle Jurassic Topawa Group, Baboquivari Mountains, south-central Arizona, is remarkable for its lithologic diversity and substantial stratigraphic thickness, ???8 km. The Topawa Group comprises four units (in order of decreasing age): (1) Ali Molina Formation-largely pyroclastic rhyolite...
Juvenile rainbow trout production in New York tributaries of Lake Ontario: implications for Atlantic salmon restoration
James E. McKenna Jr., James H. Johnson
2005, North American Journal of Fisheries Management (25) 391-403
Three Pacific salmonid species Onchorynchus spp. have replaced the extirpated Atlantic salmon Salmo salar as the main migratory salmonid in the Lake Ontario drainage. One of those species, the nonnative rainbow trout O. mykiss, has become widely distributed within the historical Atlantic salmon habitat, occupying an ecological niche similar to...
Assessment of bird populations in a high quality savanna/woodland: a banding approach
Sandra L. Wilmore, Gary A. Glowacki, Ralph Grundel
2005, Chicago Wilderness Journal (3) 5-13
Between 1999 and 2004, Save the Dunes Conservation Fund's Miller Woods Bird Banding Program monitored migrating and breeding bird populations within a high quality black oak, dry-mesic sand savanna/woodland with ridge and swale topography. The objectives of this program were to collect consistent and reliable demographic and abundance data on...
Reply to "Comment on 'How can seismic hazard around the New Madrid seismic zone be similar to that in California?' by Arthur Frankel", by Zhenming Wang, Baoping Shi, and John D. Kiefer
Arthur Frankel
2005, Seismological Research Letters (76) 472-475
[No abstract available]...
Occurrence of Cyathocephalus truncatus (Cestoda) in fishes of the Great Lakes with emphasis on its occurrence in round gobies (Neogobius melanostomus) from Lake Huron
John R. P. French III, Patrick M. Muzzall, Jean V. Adams, Kendra L. Johnson, Angela E. Flores, Andrea M. Winkel
2005, Journal of Great Lakes Research (31) 405-413
Cyathocephalus truncatus is a pathogenic cestode that is common in many Laurentian Great Lakes fish species, but the depth distribution of this cestode has not been studied. Cyathocephalus truncatus has been reported from 21 fish species and one hybrid representing seven orders and nine families in Lakes Superior, Michigan, Huron, and Ontario. We...
Thiamine status of Cayuga Lake rainbow trout and its influence on spawning migration
H. George Ketola, Thomas L. Chiotti, Robert S. Rathman, John D. Fitzsimons, Dale C. Honeyfield, Peter J. Van Dusen, Graham E. Lewis
2005, North American Journal of Fisheries Management (25) 1281-1287
Rainbow trout Oncorhynchus mykiss in Cayuga Lake, New York, appear to be suffering from a thiamine deficiency because their progeny develop general weakness, loss of equilibrium, and increased mortality, which are prevented by treatment with thiamine. Thiamine status and its effect on adults are unknown. In 2000 and 2002, we...
Application of neural networks to prediction of fish diversity and salmonid production in the Lake Ontario basin
James E. McKenna Jr.
2005, Transactions of the American Fisheries Society (134) 28-43
Diversity and fish productivity are important measures of the health and status of aquatic systems. Being able to predict the values of these indices as a function of environmental variables would be valuable to management. Diversity and productivity have been related to environmental conditions by multiple linear regression and discriminant...
Discoloration of polyvinyl chloride (PVC) tape as a proxy for water-table depth in peatlands: validation and assessment of seasonal variability
Robert K. Booth, Sara C. Hotchkiss, Douglas A. Wilcox
2005, Functional Ecology (19) 1040-1047
Summary: 1. Discoloration of polyvinyl chloride (PVC) tape has been used in peatland ecological and hydrological studies as an inexpensive way to monitor changes in water-table depth and reducing conditions. 2. We investigated the relationship between depth of PVC tape discoloration and measured water-table depth at monthly time steps during...
High resolution mapping and classification of oyster habitats in nearshore Louisiana using sidescan sonar
Y.C. Allen, C.A. Wilson, H.H. Roberts, J. Supan
2005, Estuaries (28) 435-446
Sidescan sonar holds great promise as a tool to quantitatively depict the distribution and extent of benthic habitats in Louisiana's turbid estuaries. In this study, we describe an effective protocol for acoustic sampling in this environment. We also compared three methods of classification in detail: mean-based thresholding, supervised, and unsupervised...
Aeolian sand preserved in Silver Lake: a new signal of Holocene high stands of Lake Michigan
Timothy G. Fisher, Walter L. Loope
2005, Holocene (15) 1072-1078
Aeolian sand within lake sediment from Silver Lake, Michigan can be used as a proxy for the timing of high lake levels of Lake Michigan.We demonstrate that the sand record from Silver Lake plotted as percent weight is in-phase with the elevation curve of Lake Michigan since the mid-Holocene Nipissing...
Cenozoic ice sheet history from East Antarctic Wilkes Land continental margin sediments
C. Escutia, L. De Santis, F. Donda, R. B. Dunbar, A. K. Cooper, Giuliano Brancolini, S.L. Eittreim
2005, Global and Planetary Change (45) 51-81
The long-term history of glaciation along the East Antarctic Wilkes Land margin, from the time of the first arrival of the ice sheet to the margin, through the significant periods of Cenozoic climate change is inferred using an integrated geophysical and geological approach. We postulate that the first arrival of...
Recent research on the Chesapeake Bay impact structure, USA - Impact debris and reworked ejecta
J. Wright Horton Jr., John N. Aleinikoff, Michael J. Kunk, Gregory S. Gohn, Lucy E. Edwards, Jean M. Self-Trail, David S. Powars, Glen A. Izett
2005, Book chapter
Four new coreholes in the western annular trough of the buried, late Eocene Chesapeake Bay impact structure provide samples of shocked minerals, cataclastic rocks, possible impact melt, mixed sediments, and damaged microfossils. Parautochthonous Cretaceous sediments show an upward increase in collapse, sand fluidization, and mixed sediment injections. These impact-modified sediments...
Hydrogeomorphic classification for Great Lakes coastal wetlands
Dennis A. Albert, Douglas A. Wilcox, Joel W. Ingram, Todd A. Thompson
2005, Journal of Great Lakes Research (31) 129-146
A hydrogeomorphic classification scheme for Great Lakes coastal wetlands is presented. The classification is hierarchical and first divides the wetlands into three broad hydrogeomorphic systems, lacustrine, riverine, and barrier-protected, each with unique hydrologic flow characteristics and residence time. These systems are further subdivided into finer geomorphic types based on physical...
A tropical freshwater wetlands: I. Structure, growth, and regeneration
James P. Allen, Ken W. Krauss, Katherine C. Ewel, Bobby D. Keeland, E. E. Waguk
2005, Wetlands Ecology and Management (13) 657-669
Forested wetlands dominated by Terminalia carolinensis are endemic to Micronesia but common only on the island of Kosrae, Federated States of Micronesia. On Kosrae, these forests occur on Nansepsep, Inkosr, and Sonahnpil soil types, which differ in degree of flooding and soil saturation. We compared forest structure, growth, nutrition, and regeneration on...
Distribution and seasonal abundance of trematode parasites (Trematoda: Allocreadiidae: Crepidostomum spp.) in burrowing mayfly nymphs (Ephemeroptera: Ephemeridae: Hexagenia spp.) from connecting rivers of the Laurentian Great Lakes
Don W. Schloesser
2005, Hydrobiologia (548) 177-189
Burrowing-mayfly nymphs such as Hexagenia spp. have been used extensively in North America and Europe as a biomonitoring tool to indicate mesotrophic water quality, yet infestation by associated parasites has not been well documented. We performed laboratory analysis of archived samples of Hexagenia spp. nymphs collected in 1985 and 1986...
Pathways of food uptake in native (Unionidae) and introduced (Corbiculidae and Dreissenidae) freshwater bivalves
S. Jerrine Nichols, Harold Silverman, Thomas H. Dietz, John W. Lynn, Donald L. Garling
2005, Journal of Great Lakes Research (31) 87-96
Nineteen species of adult freshwater bivalves were able to use water currents generated from within the mantle cavity to move non-suspended algae into the shell through non-siphon areas such as the anterior shell valve edge and the mid-ventral point of the shell. This was in addition to, and not in...
Dating floodplain sediments using tree-ring response to burial
Jonathan M. Friedman, K.R. Vincent, P.B. Shafroth
2005, Earth Surface Processes and Landforms (30) 1077-1091
Floodplain sediments can be dated precisely based on the change in anatomy of tree rings upon burial. When a stem of tamarisk (Tamarix ramosissima) or sandbar willow (Salix exigua) is buried, subsequent annual rings in the buried section resemble the rings of roots: rings become narrower, vessels within the rings...
American black bears and bee yard depredation at Okefenokee Swamp, Georgia
J. D. Clark, S. Dobey, D.V. Masters, B.K. Scheick, M.R. Pelton, M.E. Sunquist
2005, Ursus (16) 234-244
We studied American black bears (Ursus americanus), on the northwest periphery of Okefenokee Swamp in southeast Georgia, to assess landowner attitudes toward bears, estimate the extent of damage to commercial honey bee operations by bears, and evaluate methods to reduce bear depredations to apiaries. We collected 8,351 black bear radiolocations...
Spatiotemporal patterns of fish assemblage structure in a river impounded by low-head dams
David P. Gillette, Jeremy S. Tiemann, David R. Edds, Mark L. Wildhaber
2005, Copeia (3) 539-549
We studied spatiotemporal patterns of fish assemblage structure in the Neosho River, Kansas, a system impounded by low-head dams. Spatial variation in the fish assemblage was related to the location of dams that created alternating lotic and lentic stream reaches with differing fish assemblages. At upstream sites close to dams,...
Understanding the output of a Smith-Root GPP electrofisher
L.E. Miranda, A.B. Spencer
2005, North American Journal of Fisheries Management (25) 848-852
There is confusion among biologists about the use of the percent of range control in the GPP series of Smith-Root electrofishers. We evaluated the output of a GPP 7.5 electrofisher to examine how adjustments to the percent of range control affect voltage, pulse width, duty cycle, and waveform. We found...
Long-range movements and breeding dispersal of Prairie Falcons from southwest Idaho
Karen Steenhof, Mark R. Fuller, Michael N. Kochert, Kirk K. Bates
2005, Condor (107) 481-496
From 1999–2003, we tracked movements of adult female Prairie Falcons (Falco mexicanus) using satellite telemetry to characterize long-range movement patterns and breeding dispersal. We radio marked 40 falcons from April–May on their nesting grounds in the Snake River Birds of Prey National Conservation Area in southwest Idaho. All falcons with...
Rainfall-induced landslides in Puerto Rico: An overview
M.A. Pando, M.E. Ruiz, M. C. Larsen
2005, Conference Paper, Geotechnical Special Publication
Rainfall-induced landslides are common in Puerto Rico (PR). The presence of steep slopes in mountainous terrain, coupled with weathered soils and intense rainfall, leads to severe slope-stability problems throughout the island. Episodic triggering events such as hurricanes and earthquakes further exacerbate these problems. All physiographic provinces of the island have...
