Abstract：
:A new short life-cycle test methodology is presented to evaluate sublethal effects of contaminated sediments to the harpacticoid copepod species Nitocra spinipes. The method combines a 4-d survival-gravidity test with a 7-d development test. For water-only Cu exposures, the sensitivity of the development test endpoints were compared with tests using nonexposed gravid females to initiate the 7-d development test phase, and also with a multiple generation test comprising three successive phases: 9-d development; 21-d survival-gravidity; second-generation 9-d development. The results indicated that the development endpoints were the most sensitive, with median effective concentration (EC50) values of 95 µg Cu/L for nauplii/gravid female and 101 µg Cu/L copepodites/gravid female endpoints, followed by the gravidity (144 µg Cu/L) and survival (347 µg Cu/L). The sensitivity of the short life-cycle test endpoints was similar to the multiple-generation test endpoints, and the shorter test had less variability in controls. The multiple-generation test showed a large amount of stimulation of reproduction and development at Cu concentrations of 50 to 100 µg/L. The suitability of the short life-cycle test for assessing sediment toxicity was demonstrated using Cu-spiked and naturally contaminated whole sediments. Although the small nauplii were more difficult to isolate from sediments, the small amounts of sediments used for the tests and the large effects of the contaminated sediments on nauplii and copepodite numbers resulted in significant differences to controls. For sediment exposures, the sensitivity of the endpoints was in the order development > gravidity > survival. The short life-cycle test was demonstrated to detect, within 11 d of exposure, similar levels of effects on reproduction and development to those detected using a 39-d multiple-generation exposure.
journal_name
Environ Toxicol Chemjournal_title
Environmental toxicology and chemistryauthors
Perez-Landa V,Simpson SLdoi
10.1002/etc.513subject
Has Abstractpub_date
2011-06-01 00:00:00pages
1430-9issue
6eissn
0730-7268issn
1552-8618journal_volume
30pub_type
杂志文章abstract：:A study of the ecotoxicity of different short aliphatic protic ionic liquids (PILs) on terrestrial organisms was conducted. Tests performed within the present study include those assessing the effects of PILs on soil microbial functions (carbon and nitrogen mineralization) and terrestrial plants. The results show that...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.683
更新日期：2011-12-01 00:00:00
abstract：:Effects of three photosystem II inhibitors and of their mixture on a freshwater phytoplankton community were studied in outdoor mesocosms. Atrazine, isoproturon, and diuron were applied as 30% hazardous concentrations (HC30s) obtained from species-sensitivity distributions. Taking concentration addition into account, ...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1897/08-135R.1
更新日期：2009-04-01 00:00:00
abstract：:The desorption behavior of benzidine from Lake Macatawa (Holland, MI, USA) sediment was investigated in this study using batch solvent extraction method. Seven solvents were tested as the extracting reagents: Deionized water (DI), calcium chloride in DI (CaCl2), sodium hydroxide in DI (NaOH), acetonitrile (ACN), a mix...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1897/05-017r.1
更新日期：2005-12-01 00:00:00
abstract：:We evaluated the utility of gene-transcriptional responses in the liver of mosquitofish (Gambusia affinis), a species introduced to many countries and therefore widely available, for detecting endocrine-disrupting activity in water. Exposure to β-naphthoflavone, an aryl hydrocarbon receptor (AhR) agonist, significantl...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.669
更新日期：2011-12-01 00:00:00
abstract：:A market for bisphenol A (BPA) replacement compounds has emerged due to restrictions on the use of BPA. Some of these compounds were detected in the environment, yet little is known about their toxicological properties. In the present study, an avian in vitro toxicogenomic approach was used to compare the effects of f...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.4985
更新日期：2021-01-19 00:00:00
abstract：:The European Union System for the Evaluation of Substances (EUSES) is a computerized model system to facilitate and harmonize health and environmental risk assessment of previously notified and new substances. For calculation of regional background exposure, a multimedia distribution model is used. In the present stud...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1897/03-529
更新日期：2004-10-01 00:00:00
abstract：:Eel aquaculture is capture based and thus dependent on the fishery for juvenile glass eels. This fishery typically takes place in estuaries where salinity varies and ammonia levels can be elevated. Also, during capture and transport glass eels are kept at high densities and ammonia from endogenous production can incre...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1897/08-104.1
更新日期：2009-01-01 00:00:00
abstract：:Silver nanoparticles (AgNPs) from industrial use, discharged via the land application of sewage sludge, are interacting with soil biota, including earthworms. In affected organisms, excessive production of reactive oxygen species can result in lipid peroxidation, shifting the balance between oxidants and antioxidants ...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.4713
更新日期：2020-05-01 00:00:00
abstract：:Locomotor behavior in terrestrial organisms is crucial for burrowing, avoiding predators, food seeking, migration, and reproduction; therefore, it is a parameter with ecological relevance. Acetylcholinesterase (AChE) is a nervous system enzyme inhibited by several compounds and widely used as an exposure biomarker in ...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1897/04-131r.1
更新日期：2005-03-01 00:00:00
abstract：:The aquatic ecological environment is being threatened from overuse of pesticides, and the aquatic toxicity toward rainbow trout (Oncorhynchus mykiss) plays a significant role in environmental risk assessment of agrochemicals. In the present study, 2 norm index formulas were developed, from which several norm descript...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.4621
更新日期：2020-02-01 00:00:00
abstract：:As part of the University of Michigan Dioxin Exposure Study, soil samples were collected from 766 residential properties near the Tittabawassee River between Midland and Saginaw; near the Dow Chemical Facility in Midland; and, for comparison, in the other areas of Midland and Saginaw Counties and in Jackson and Calhou...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.24
更新日期：2010-01-01 00:00:00
abstract：:Biofilms can make good bioindicators and biomarkers, offering a convenient tool to monitor metal contamination in streams that results from mine tailing sites. Biofilm metal content (Cu, Zn, Cd, Pb) as well as diatom diversity and the presence of teratologies (diatom abnormalities) were determined for biofilms from ri...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.3292
更新日期：2016-06-01 00:00:00
abstract：:Understanding the dietary absorption efficiency of chemicals in the gastrointestinal tract of fish is important from both a scientific and a regulatory point of view. However, reported fish absorption efficiencies for well-studied chemicals are highly variable. In the present study, the authors developed and exploited...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.2361
更新日期：2013-12-01 00:00:00
abstract：:Sediment-quality assessment often is hindered by the lack of agreement between chemical and biological lines of evidence. One limitation is that the bulk sediment toxicant concentration, the most widely used chemical parameter, does not always represent the bioavailable concentration, particularly for hydrophobic orga...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1897/08-322R.1
更新日期：2009-04-01 00:00:00
abstract：:Toxicity of cadmium to early life stages of brown trout (Salmo trutta) was determined at multiple water hardnesses. Increasing water hardness decreased cadmium toxicity. Postswimup fry were much more sensitive than embryos and larvae. Chronic values from early life stage tests initiated with eyed embryos were 3.52, 6....
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1897/06-376r.1
更新日期：2007-08-01 00:00:00
abstract：:We examined the subcellular partitioning of zinc (Zn) in Daphnia magna both under acute and chronic exposures. In the acute Zn toxicity tests, the daphnids were exposed to different Zn concentrations for 48 h or to one lethal concentration (1,000 microg/L) for different durations (time to death for up to 47 h). Signif...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.229
更新日期：2010-08-01 00:00:00
abstract：:Earthworms were shown to significantly avoid soils spiked with Pb at concentrations lower than or comparable to concentrations that demonstrate significant effects for other endpoints. It was also shown that inclusion of a microorganism-produced volatile compound that attracts earthworms, ethyl valerate, decreased avo...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.3619
更新日期：2017-04-01 00:00:00
abstract：:Most of the public literature and available guidance documents on the conduct of freshwater whole-sediment toxicity identification and evaluations (TIEs) detail the use of test organisms and amending agents that are readily available in North America. These commonly used test organisms and the supported amending agent...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.3787
更新日期：2017-09-01 00:00:00
abstract：:Extensive season-by-season sampling was used to establish the normal range of whole-body Na+ and Cl- and Na+ uptake in healthy populations of two fish species, rainbow trout, Oncorhynchus mykiss, and fathead minnow, Pimephales promelas, of known differences in sensitivity to ionoregulatory toxicants (low pH, trace met...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：
更新日期：2002-08-01 00:00:00
abstract：:Monitoring and assessing the effects of contaminants in the aquatic eco-environment is critical in protecting human health and the environment. The zebrafish has been widely used as a prominent model organism in different fields because of its small size, low cost, diverse adaptability, short breeding cycle, high fecu...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章,评审
doi：10.1002/etc.2406
更新日期：2014-01-01 00:00:00
abstract：:Adult African clawed frogs (Xenopus laevis) were collected from a corn-growing region (CGR) and a non-corn-growing region (NCGR) with different exposure profiles for atrazine and related triazines. Physical, chemical, and biological parameters from the catchment areas were also measured. Frogs were surveyed for possib...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1897/03-450
更新日期：2004-08-01 00:00:00
abstract：:The estrogenic activity of the effluent from three municipal wastewater treatment plants (WWTPs) in Nanjing, China, was investigated. The water samples were enriched by solid-phase extraction and then eluted with different polar solvents, which gave 11 fractionated extracts. Chemical analysis and a vitellogenin (Vtg) ...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.155
更新日期：2010-06-01 00:00:00
abstract：:Traditional risk assessment guidelines employ acute or chronic toxicity tests for a maximum of one generation of organisms. These tests are usually performed in the laboratory at a constant standard temperature, although in the field organisms may experience different temperatures, which may be a source of additional ...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.1969
更新日期：2012-10-01 00:00:00
abstract：:Laboratory-based algal assays were developed to explore the bioavailability of copper to the marine alga Thalassiosira weissflogii. A calibration strategy was developed that avoided use of the synthetic ligand ethylenediaminetetraacetic acid (EDTA) in the Aquil growth medium, thereby allowing ambient metal speciation....
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1897/05-214r.1
更新日期：2006-04-01 00:00:00
abstract：:Given the urgent need for ecologically relevant toxicity tools specific to estuarine systems, the main goal of the present study was to develop and evaluate the potential of an in situ algal assay for estuarine sediment-overlying water toxicity evaluations using the microalga Phaeodactylum tricornutum immobilized in a...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1897/05-266r.1
更新日期：2006-09-01 00:00:00
abstract：:Lead (Pb) is a typical toxic heavy metal element in soils and plants, which has a potential threat to human health through the food chain. Pb uptake in the soil-vegetable system has attracted broad attention, while reports on the main controlling factors of Pb uptake and accumulation in different soil-vegetable system...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.4997
更新日期：2021-01-27 00:00:00
abstract：:Development of a terrestrial biotic ligand model (TBLM) for higher plants requires a root-Cu accumulation value that corresponds to the 50% inhibitory concentration (IC50). However, it is not yet known which of the two previously reported Cu-binding ligands on the root is associated with Cu toxicity. The aim of the pr...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1897/06-641R.1
更新日期：2007-11-01 00:00:00
abstract：:The U.S. Environmental Protection Agency is developing ecological soil screening levels (Eco-SSLs) for the ecological risk assessment of contaminants at Superfund sites. The Eco-SSLs for several soil contaminants have been developed from toxicity benchmarks for soil invertebrates in the existing literature. Insufficie...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1897/04-545r.1
更新日期：2006-03-01 00:00:00
abstract：:Ten agronomic plant species were exposed to different concentrations of nano-titanium dioxide (nTiO2 ) or nano-cerium oxide (nCeO2 ) (0 μg/mL, 250 μg/mL, 500 μg/mL, and 1000 μg/mL) to examine potential effects on germination and early seedling development. The authors modified a standard test protocol developed for so...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.3374
更新日期：2016-09-01 00:00:00
abstract：:Hypothesis-based no-effect-concentration (NOEC) and regression-based x% effect concentration (ECx) values are common statistical approaches used to summarize ecotoxicological effects. Controversy over the NOEC model has prompted a movement toward discontinuation of the NOEC in favor of ECx, but the best x% effect surr...
journal_title：Environmental toxicology and chemistry
pub_type： 杂志文章
doi：10.1002/etc.3086
更新日期：2015-10-01 00:00:00
