Challenges in evaluating the impact of the trade in amphibians and reptiles on wild populations
Martin A. Schlaepfer, Craig Hoover, C. Kenneth Dodd Jr.
2005, BioScience (55) 256-263
Amphibians and reptiles are taken from the wild and sold commercially as food, pets, and traditional medicines. The overcollecting of some species highlights the need to assess the trade and ensure that it is not contributing to declines in wild populations. Unlike most countries, the United States tracks the imports...
Subsidence hazards due to evaporite dissolution in the United States
Kenneth S. Johnson
2005, Environmental Geology (48) 395-409
Evaporites, including gypsum (or anhydrite) and salt, are the most soluble of common rocks; they are dissolved readily to form the same type of karst features that typically are found in limestones and dolomites, and their dissolution can locally result in major subsidence structures. The four basic requirements for evaporite...
Methyl tert-butyl ether occurrence and related factors in public and private wells in southeast New Hampshire
Joseph D. Ayotte, Denise M. Argue, Frederick J. McGarry
2005, Environmental Science & Technology (39) 9-16
The occurrence of methyl tert-butyl ether (MTBE) in water from public wells in New Hampshire has increased steadily over the past several years. Using a laboratory reporting level of 0.2 μg/L, 40% of samples from public wells and 21% from private wells in southeast New Hampshire have measurable concentrations of MTBE....
Three-dimensional variable-density flow simulation of a coastal aquifer in southern Oahu, Hawaii, USA
S. B. Gingerich, C.I. Voss
2005, Hydrogeology Journal (13) 436-450
Three-dimensional modeling of groundwater flow and solute transport in the Pearl Harbor aquifer, southern Oahu, Hawaii, shows that the readjustment of the freshwater–saltwater transition zone takes a long time following changes in pumping, irrigation, or recharge in the aquifer system. It takes about 50 years for the transition zone to...
CO2 dynamics in the Amargosa Desert: Fluxes and isotopic speciation in a deep unsaturated zone
Michelle Ann Walvoord, Robert G. Striegl, David E. Prudic, David A. Stonestrom
2005, Water Resources Research (41) 1-15
Natural unsaturated-zone gas profiles at the U.S. Geological Survey's Amargosa Desert Research Site, near Beatty, Nevada, reveal the presence of two physically and isotopically distinct CO2 sources, one shallow and one deep. The shallow source derives from seasonally variable autotrophic and heterotrophic respiration in the root zone. Scanning electron micrograph...
Inducible defenses in food webs: Chapter 3.4
Matthijs Vos, Bob W. Kooi, Donald L. DeAngelis, Wolf M. Mooij
Peter de Ruiter, Volkmar Wolters, John C. Moore, Kimberly Melville-Smith, editor(s)
2005, Book chapter, Dynamic food webs: Multispecies assemblages, ecosystem development, and environmental change
This chapter reviews the predicted effects of induced defenses on trophic structure and two aspects of stability, “local” stability and persistence, as well as presenting novel results on a third, resilience. Food webs are structures of populations in a given location organized according to their predator–prey interactions. Interaction strengths and,...
Prey vulnerability to peacock cichlids and largemouth bass based on predator gape and prey body depth
Jeffrey E. Hill, Leo G. Nico, Charles E. Cichra, Carter R. Gilbert
2005, Proceedings of the Southeastern Association of Fish and Wildlife Agencies (58) 47-56
The interaction of prey fish body depth and predator gape size may produce prey assemblages dominated by invulnerable prey and excessive prey-to-predator biomass ratios. Peacock cichlids (Cichla ocellaris) were stocked into southeast Florida canals to consume excess prey fish biomass, particularly spotted tilapia (Tilapia mariae). The ecomorphologically similar largemouth bass...
Stakeholder survey results for Lake Umbagog National Wildlife Refuge: Completion report
Natalie R. Sexton, Susan C. Stewart, Lynne Koontz, Katherine D. Wundrock
2005, Open-File Report 2005-1378
Lake Umbagog is a newly established Refuge (in 1993) with an increasing visitation. Current visitation numbers are around 55,000 visits/year. Though limited visitor services are currently offered, additional services will be proposed in the CCP. The purpose of this survey is to assess interested publics' and stakeholders' satisfaction with existing...
Effects of biodiversity on ecosystem processes: Implications for ecosystem management
D.U. Hooper, F. S. Chapin III, J.J. Ewel, A. Hector, P. Inchausti, W.K. Lauenroth, S. Lavorel, D.M. Lodge, M. Loreau, S. Naeem, B. Schmid, H. Setala, A.J. Symstad, J. Vandermeer, D.A. Wardle
2005, Report
No abstract available....
The Nature Conservancy's approach to conserving and rehabilitating biological diversity in the Upper Mississippi River system
M. Reuter, K. Lubinski, P. West, D. Blodgett, M. Khoury
2005, Archiv fur Hydrobiologie (15 Suppl.) 549-560
Abstract has not been submitted...
Markov Chain Monte Carlo estimation of species distributions: A case study of the swift fox in western Kansas
Glen A. Sargeant, Marsha A. Sovada, Christiane C. Slivinski, Douglas H. Johnson
2005, Journal of Wildlife Management (69) 483-487
Accurate maps of species distributions are essential tools for wildlife research and conservation. Unfortunately, biologists often are forced to rely on maps derived from observed occurrences recorded opportunistically during observation periods of variable length. Spurious inferences are likely to result because such maps are profoundly affected by the duration and...
Coastal iron fluxes to surface waters of the NE Pacific: A driver of the marine ecosystem and carbon cycle
John Crusius, J.L. Nielsen
2005, Report
Contemporaneous trachyandesitic and calc-alkaline volcanism of the Huerto Andesite, San Juan Volcanic Field, Colorado, USA
F. Parat, M.A. Dungan, P. W. Lipman
2005, Journal of Petrology (46) 859-891
Locally, voluminous andesitic volcanism both preceded and followed large eruptions of silicic ash-flow tuff from many calderas in the San Juan volcanic field. The most voluminous post-collapse lava suite of the central San Juan caldera cluster is the 28 Ma Huerto Andesite, a diverse assemblage erupted from at least 5–6 volcanic...
A synthesis of ecological and fish-community changes in Lake Ontario, 1970-2000
E.L. Mills, J.M. Casselman, R. Dermott, J.D. Fitzsimons, G. Gal, K. T. Holeck, J.A. Hoyle, O. E. Johannsson, B.F. Lantry, J.C. Makarewicz, E.S. Millard, I.F. Munawar, M. Munawar, R. O'Gorman, R.W. Owens, L. G. Rudstam, T. Schaner, T.J. Stewart
2005, Technical Report 67
We assessed stressors associated with ecological and fishcommunity changes in Lake Ontario since 1970, when the first symposium on Salmonid Communities in Oligotrophic Lakes (SCOL I) was held (J. Fish. Res. Board Can. 29: 613-616). Phosphorus controls implemented in the early 1970s were undeniably successful; lower food-web studies showed declines...
Ecosystem maturity and performance
Q. Guo
2005, Nature (435) E6-E6
Arising from: Bai, Y., Han, X., Wu, J., Chen, Z. & Li, L. Nature, 431, 181–184 (2004); see also communication from Wang et al.; Bai, Y., Han, X., Wu, J., Chen, Z. & Li, L. reply.The effect of maturity, or successional stage, on ecosystem performance (measured as productivity or stability,...
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,...
Subtle structural influences on coal thickness and distribution: Examples from the Lower Broas-Stockton coal (Middle Pennsylvanian), Eastern Kentucky Coal Field, USA
S.F. Greb, C.F. Eble, J.C. Hower
2005, Special Paper of the Geological Society of America 31-50
The Lower Broas-Stockton coal is a heavily mined coal of the Central Appalachian Basin. Coal thickness, distribution, composition, and stratigraphic position were compared with basement structure, gas and oil field trends, and sequence strat- igraphic and paleoclimate interpretations to better understand the geology of the Stockton coal bed in eastern...
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...
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...
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...
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...
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...
Ground-motion parameters of the southwestern Indiana earthquake of 18 June 2002 and the disparity between the observed and predicted values
R. Street, J. Wiegand, E.W. Woolery, P. Hart
2005, Seismological Research Letters (76) 512-530
The M 4.5 southwestern Indiana earthquake of 18 June 2002 triggered 46 blast monitors in Indiana, Illinois, and Kentucky. The resulting flee-field particle velocity records, along with similar data from previous earthquakes in the study area, provide a clear standard for judging the reliability of current...
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...
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...
