Publications
Dive into our publications and explore the science from the Environmental Health Program (Toxic Substances Hydrology and Contaminant Biology).
Filter Total Items: 4094
Short-term effect of cattle exclosures on Columbia Spotted Frog (Rana luteiventris) populations and habitat in northeastern Oregon
Livestock grazing is a common land use across the western United States, but concerns have been raised regarding its potential to affect amphibian populations. We studied the short-term effects of full and partial livestock grazing exclosures on Rana luteiventris (Columbia Spotted Frog) populations using a controlled manipulative field experiment with pre- and posttreatment data (2002–2006). Despi
Authors
M. J. Adams, Christopher Pearl, Brome McCreary, Stephanie Galvan, Stephanie J. Wessell, Wendy Wente, Chauncey W. Anderson, Allison B. Kuehl
Dietary segregation of pelagic and littoral fish assemblages in a highly modified tidal freshwater estuary
Estuarine food webs are highly variable and complex, making identification of their trophic pathways difficult. Energy for the food web of the San Francisco Estuary is thought to be based largely on in situ phytoplankton production, but little attention has been paid to littoral habitats, where other energy sources may be important. We analyzed the stomach contents of over 960 juvenile fishes and
Authors
Lenny Grimaldo, A. Robin Stewart, Wim Kimmerer
A comparison of phase inversion and traveltime tomography for processing near-surface refraction traveltimes
With phase inversion, one can estimate subsurface velocities using the phases of first-arriving waves, which are the frequency-domain equivalents of the traveltimes. Phase inversion is modified to make it suitable for processing traveltimes from near-surface refraction surveys. The modifications include parameterizing the model, correcting the observed phases, and selecting the complex frequency.
Authors
Karl J. Ellefsen
An ecological risk assessment of the exposure and effects of 2,4-D acid to rainbow trout (Oncorhyncus mykiss)
Numerous state and federal agencies are increasingly concerned with the rapid expansion of invasive, noxious weeds across the United States. Herbicides are frequently applied as weed control measures in forest and rangeland ecosystems that frequently overlap with critical habitats of threatened and endangered fish species. However, there is little published chronic toxicity data for herbicides and
Authors
James Fairchild, Kevin P. Feltz, Ann Allert, L.C. Sappington, K.J. Nelson, J.A. Valle
Influence of thiamine deficiency on Lake Trout larval growth, foraging, and predator avoidance
Diet‐related thiamine deficiency increases the acute mortality, known as early mortality syndrome, of salmonines from some of the Great Lakes. The consequences of thiamine deficiency as measured at the egg stage for other important early life stage processes like growth, foraging efficiency, and predator avoidance that may also result in mortality, are unknown. Accordingly, we investigated the imp
Authors
J.D. Fitzsimons, Scott B. Brown, B. Williston, G. Williston, Lisa R. Brown, K. Moore, Dale C. Honeyfield, Donald E. Tillitt
What does "water quality" mean?
No abstract available.
Authors
Francis H. Chapelle, Paul M. Bradley, Peter B. McMahon, Bruce Lindsey
Dual nitrate isotopes in dry deposition: Utility for partitioning NOx source contributions to landscape nitrogen deposition
Dry deposition is a major component of total atmospheric nitrogen deposition and thus an important source of bioavailable nitrogen to ecosystems. However, relative to wet deposition, less is known regarding the sources and spatial variability of dry deposition. This is in part due to difficulty in measuring dry deposition and associated deposition velocities. Passive sampling techniques offer pote
Authors
E.M. Elliott, Carol Kendall, E. W. Boyer, Douglas A. Burns, Gary Lear, H.E. Golden, K. Harlin, A. Bytnerowicz, T.J. Butler, R. Glatz
Response to "comment on 'bioaccumulation of pharmaceuticals and other anthropogenic waste indicators in earthworms from agricultural soil amended with biosolid or swine manure'"
No abstract available.
Authors
Chad A. Kinney, Edward T. Furlong, Dana W. Kolpin, Mark R. Burkhardt, Steven D. Zaugg, Stephen L. Werner, J.P. Bossio, Mark J. Benotti
Spatially detailed quantification of metal loading for decision making: Metal mass loading to American fork and Mary Ellen Gulch, Utah
Effective remediation requires an understanding of the relative contributions of metals from all sources in a catchment, and that understanding must be based on a spatially detailed quantification of metal loading. A traditional approach to quantifying metal loading has been to measure discharge and chemistry at a catchment outlet. This approach can quantify annual loading and the temporal changes
Authors
B. A. Kimball, R.L. Runkel
PCBs and DDE in tree swallow (Tachycineta bicolor) eggs and nestlings from an estuarine PCB superfund site, New Bedford Harbor, MA, U.S.A.
While breeding tree swallows (Tachycineta bicolor) have been used as biomonitors for freshwater sites, we report the first use of this species to assess contaminant bioaccumulation from estuarine breeding grounds into these aerial insectivores. Eggs and nestlings were collected from nest boxes in a polychlorinated biphenyl (PCB) contaminated estuary, the New Bedford Harbor Superfund site (NBH, Mas
Authors
Saro Jayaraman, Diane E. Nacci, Denise M. Champlin, Richard J. Pruell, Kenneth J. Rocha, Christine M. Custer, Thomas W. Custer, Mark Cantwell
Arsenic in the evolution of earth and extraterrestrial ecosystems
If you were asked to speculate about the form extra-terrestrial life on Mars might take, which geomicrobial phenomenon might you select as a model system, assuming that life on Mars would be ‘primitive’? Give your reasons.At the end of my senior year at Rensselaer Polytechnic Institute in 1968, I took Professor Ehrlich's final for his Geomicrobiology course. The above question beckoned to me like
Authors
R.S. Oremland, C.W. Saltikov, Felisa Wolfe-Simon, J.F. Stolz
Widespread occurrence of intersex in black basses (Micropterus spp.) from U.S. rivers, 1995-2004
Intersex occurrence in freshwater fishes was evaluated for nine river basins in the United States. Testicular oocytes (predominantly male testes containing female germ cells) were the most pervasive form of intersex observed, even though similar numbers of male (n = 1477) and female (n = 1633) fish were examined. Intersex was found in 3% of the fish collected. The intersex condition was observed i
Authors
J.E. Hinck, V. S. Blazer, C. J. Schmitt, D. M. Papoulias, D. E. Tillitt