In vivo effects of bisphenol A in laboratory rodent studies
Cathy A. Richter, Linda S. Birnbaum, Francesca Farabollini, Retha R. Newbold, Beverly S. Rubin, Chris E. Talsness, John G. Vandenbergh, Debby R. Walser-Kuntz, Frederick S. vom Saal
2007, Reproductive Toxicology (24) 199-224
Concern is mounting regarding the human health and environmental effects of bisphenol A (BPA), a high-production-volume chemical used in synthesis of plastics. We have reviewed the growing literature on effects of low doses of BPA, below 50 mg/(kg day), in laboratory exposures with mammalian model organisms. Many, but not all, effects of...
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...
Sedimentary rock-hosted Au deposits of the Dian-Qian-Gui area, Guizhou, and Yunnan Provinces, and Guangxi District, China
S. G. Peters, H. Jiazhan, L. Zhiping, J. Chenggui
2007, Ore Geology Reviews (31) 170-204
Sedimentary rock-hosted Au deposits in the Dian-Qian-Gui area in southwest China are hosted in Paleozoic and early Mesozoic sedimentary rocks along the southwest margin of the Yangtze (South China) Precambrian craton. Most deposits have characteristics similar to Carlin-type Au deposits and are spatially associated, on a regional scale, with deposits...
Biodegradation of PAHs and PCBs in soils and sludges
L. Liu, J.A. Tindall, M.J. Friedel
2007, Water, Air, & Soil Pollution (181) 281-296
Results from a multi-year, pilot-scale land treatment project for PAHs and PCBs biodegradation were evaluated. A mathematical model, capable of describing sorption, sequestration, and biodegradation in soil/water systems, is applied to interpret the efficacy of a sequential active-passive biotreatment process of organic chemicals on remediation sites. To account for the...
The effect of long-term spatiotemporal variations in urbanization-induced eutrophication on a benthic ecosystem, Osaka Bay, Japan
Moriaki Yasuhara, Hideo Yamazaki, Akira Tsujimoto, K. Hirose
2007, Limnology and Oceanography (52) 1633-1644
Detailed spatiotemporal patterns of the influence of urbanization-induced eutrophication on a metazoan benthic community in Osaka Bay were determined using sediment cores and fossil ostracode assemblages from the last 200 yr. Results suggest that total abundance of ostracodes increased in the middle part of the bay as a result of...
Potential ecotoxicological significance of elevated concentrations of strontium in eggshells of passerine birds
Miguel A. Mora, Robert J. Taylor, Bryan L. Brattin
2007, Condor (109) 199-205
We investigated the occurrence and potential ecotoxicological significance of elevated concentrations of strontium (Sr) in eggshells of nine passerine birds from four regions in Arizona. Concentrations of Sr in eggshells ranged from 70 to 1360 µg g−1 dry weight (overall mean = 684 ± 345 SD µg g−1 dw) for the four...
Bioenergetic and pharmacokinetic model for exposure of common loon (Gavia immer) chicks to methylmercury
W. H. Karasov, K.P. Kenow, M.W. Meyer, F. Fournier
2007, Environmental Toxicology and Chemistry (26) 677-685
A bioenergetics model was used to predict food intake of common loon (Gavia immer) chicks as a function of body mass during development, and a pharmacokinetics model, based on first-order kinetics in a single compartment, was used to predict blood Hg level as a function of food intake rate, food...
Evaluation of grassland dynamics in the northern-tibet plateau of china using remote sensing and climate data
Jiahua Zhang, Fengmei Yao, Lingyun Zheng, Limin Yang
2007, Sensors (7) 3312-3328
The grassland ecosystem in the Northern-Tibet Plateau (NTP) of China is very sensitive to weather and climate conditions of the region. In this study, we investigate the spatial and temporal variations of the grassland ecosystem in the NTP using the NOAA/AVHRR ten-day maximum NDVI composite data of 1981-2001. The relationships...
Biparental incubation in the chestnut-vented tit-babbler Parisoma subcaeruleum: Mates devote equal time, but males keep eggs warmer
S.K. Auer, R.D. Bassar, T. E. Martin
2007, Journal of Avian Biology (38) 278-283
Biparental care in birds is less common during incubation than in other nesting stages. Males share in incubating eggs in a minority of bird species, and male effort is generally thought to be lower than females when sharing does occur. However, male assistance and incubation efficacy is poorly studied in...
The geochemistry of pesticides
Jack E. Barbash
2007, Book chapter, Treatise on geochemistry
The mid-1970s marked a major turning point in human history, for it was at that moment that the ability of the Earth’s ecosystems to absorb most of the biological impacts of human activities appears to have been exceeded by the magnitude of those impacts. This conclusion is based partly upon...
Arsenic speciation in arsenic-rich Brazilian soils from gold mining sites under anaerobic incubation
J. W. V. De Mello, J.L. Talbott, J. Scott, William R. Roy, J.W. Stucki
2007, Environmental Science and Pollution Research (14) 388-396
Background. Arsenic speciation in environmental samples is essential for studying toxicity, mobility and bio-transformation of As in aquatic and terrestrial environments. Although the inorganic species As(III) and As(V) have been considered dominant in soils and sediments, organisms are able to metabolize inorganic forms of arsenic into organo-arsenic compounds. Arsenosugars and...
Zaphrentis and the Zaphrentidae (Devonian; anthozoa, rugosa)
W. A. Oliver Jr.
2007, Bulletins of American Paleontology (2007) 5-24
Zaphrentis is one of the most widely used names in Paleozoic coral paleontology. Species of "Zaphrentis" have been named from every Paleozoic System except the Cambrian. Variants of the word, such as zaphrentoid, are widely used with varied meanings. Nomenclatural spinoffs are numerous: Neozaphrentis and Heterophrentis are obvious examples, but...
Interleukin-6 and tumor necrosis factor-alpha values in elk neonates
S. M. Barber-Meyer, C. R. Johnson, M.P. Murtaugh, L.D. Mech, P.J. White
2007, Journal of Mammalogy (88) 421-426
Serological indicators of general condition would be helpful for monitoring or assessing ungulate wildlife. Toward that end, we report the 1st reference values for 2 cytokines, interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-??), in neonatal elk (Cervus elaphus). We obtained blood samples from 140 calves ??? 6 days old in...
Alaskan birds at risk: Widespread beak deformities in resident species
Caroline R. Van Hemert
2007, Birding (39) 48-55
The team creeps silently across a well-tended lawn, eyes drawn to a small wooden box perched several meters up a lone birch tree. The first biologist is armed with a broom in one hand and a bug net in the other. Her partner wields a lunchbox-sized plastic case and a...
The influence of river regulation and land use on floodplain forest regeneration in the semi-arid upper Colorado River Basin, USA
K. Northcott, D.C. Andersen, D.J. Cooper
2007, River Research and Applications (23) 565-577
Flow regulation effects on floodplain forests in the semi-arid western United States are moderately well understood, whereas effects associated with changes in floodplain land use are poorly documented. We mapped land cover patterns from recent aerial photos and applied a classification scheme to mainstem alluvial floodplains in 10 subjectively selected...
Molecular systematics of Serrasalmidae: Deciphering the identities of piranha species and unraveling their evolutionary histories
B. Freeman, L.G. Nico, M. Osentoski, H.L. Jelks, T.M. Collins
2007, Zootaxa 1-38
Piranhas and their relatives have proven to be a challenging group from a systematic perspective, with difficulties in identification of species, linking of juveniles to adults, diagnosis of genera, and recognition of higher-level clades. In this study we add new molecular data consisting of three mitochondrial regions for museum vouchered...
Ambiguous taxa: Effects on the characterization and interpretation of invertebrate assemblages
T. F. Cuffney, Michael D. Bilger, A.M. Haigler
2007, Journal of the North American Benthological Society (26) 286-307
Damaged and immature specimens often result in macroinvertebrate data that contain ambiguous parent-child pairs (i.e., abundances associated with multiple related levels of the taxonomic hierarchy such as Baetis pluto and the associated ambiguous parent Baetis sp.). The choice of method used to resolve ambiguous parent-child pairs may have a very...
An evaluation of petrogenic hydrocarbons in northern Gulf of Alaska continental shelf sediments - The role of coastal oil seep inputs
J.W. Short, J.J. Kolak, J. R. Payne, G. K. Van Kooten
2007, Organic Geochemistry (38) 643-670
We compared hydrocarbons in water, suspended particulate matter (SPM), and riparian sediment collected from coastal watersheds along the Yakataga foreland with corresponding hydrocarbons in Gulf of Alaska benthic sediments. This comparison allows an evaluation of hydrocarbon contributions to marine sediments from natural oil seeps, coal and organic matter (e.g., kerogen)...
Developing methods to assess and predict the population level effects of environmental contaminants.
J.M. Emlen, K.R. Springman
2007, Integrated Environmental Assessment and Management (3) 157-165
The field of ecological toxicity seems largely to have drifted away from what its title implies--assessing and predicting the ecological consequences of environmental contaminants--moving instead toward an emphasis on individual effects and physiologic case studies. This paper elucidates how a relatively new ecological methodology, interaction assessment (INTASS), could be useful...
Estimation of evapotranspiration by reed canarygrass using field observations and model simulations
K. E. Schilling, James R. Kiniry
2007, Journal of Hydrology (337) 356-363
Reed canarygrass (Phalaris arundinacea) commonly invades meadow wetlands, effectively dominating water use and outcompeting native plants. Objectives of this study were to (i) estimate daily, seasonal and annual water use by reed canarygrass using shallow water table fluctuations; and (ii) calibrate the ALMANAC (Agricultural Land Management Alternative with Numerical Assessment...
Pyroclastic activity at home plate in Gusev crater, Mars
S. W. Squyres, O. Aharonson, B. C. Clark, B. A. Cohen, L. Crumpler, P.A. de Souza, W. H. Farrand, Ralf Gellert, J. Grant, J.P. Grotzinger, A. F. C. Haldemann, J. R. Johnson, G. Klingelhofer, K.W. Lewis, R. Li, T. McCoy, A. S. McEwen, H.Y. McSween, D. W. Ming, Johnnie N. Moore, R.V. Morris, T. J. Parker, J. W. Rice Jr., S. Ruff, M. Schmidt, C. Schroder, L.A. Soderblom, A. Yen
2007, Science (316) 738-742
Home Plate is a layered plateau in Gusev crater on Mars. It is composed of clastic rocks of moderately altered alkali basalt composition, enriched in some highly volatile elements. A coarse-grained lower unit lies under a finer-grained upper unit. Textural observations indicate that the lower strata were emplaced in an...
Stream ecosystem response to limestone treatment in acid impacted watersheds of the allegheny plateau
S.E. McClurg, J.T. Petty, P. M. Mazik, J.L. Clayton
2007, Ecological Applications (17) 1087-1104
Restoration programs are expanding worldwide, but assessments of restoration effectiveness are rare. The objectives of our study were to assess current acid-precipitation remediation programs in streams of the Allegheny Plateau ecoregion of West Virginia (USA), identify specific attributes that could and could not be fully restored, and quantify temporal trends...
Occurrence of pesticides in water, sediment, and soil from the Yolo Bypass, California
Kelly L. Smalling, James L. Orlando, Kathryn Kuivila
2007, San Francisco Estuary and Watershed Science (5)
The objective of this study was to evaluate the potential sources of pesticides to the Yolo Bypass, including those that could potentially impact critical life stages of resident fish. To assess direct inputs during inundation, pesticide concentrations were analyzed in water and suspended and bed sediment samples collected from source...
A new comprehensive approach to characterizing carbonaceous aerosol with an application to wintertime Fresno, California PM2.5
P. Herckes, J.A. Leenheer, J.L. Collett Jr.
2007, Atmospheric Chemistry and Physics Discussions (7) 8423-8453
Fine particulate matter (PM2.5) samples were collected during a three week winter period in Fresno (CA). A composite sample was characterized by isolating several distinct fractions and characterizing them by infrared and nuclear magnetic resonance (NMR) spectroscopy. More than 80% of the organic matter in the aerosol samples was recovered...
A simple model for the spatially-variable coastal response to hurricanes
H.F. Stockdon, A. H. Sallenger Jr., R.A. Holman, P.A. Howd
2007, Marine Geology (238) 1-20
The vulnerability of a beach to extreme coastal change during a hurricane can be estimated by comparing the relative elevations of storm-induced water levels to those of the dune or berm. A simple model that defines the coastal response based on these elevations was used to hindcast the potential impact...
