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Integrated Environmental Assessment and Management

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https://www.readbyqxmd.com/read/27935241/what-training-and-skills-will-the-ecotoxicologists-of-the-future-require
#1
Meagan J Harris, Duane B Huggett, Jane P Staveley, John P Sumpter
Students and academic researchers conduct a diverse range of studies that add to the growing body of ecotoxicology research. Once an academic researcher entertains an applied research topic, there is potential for that research to be used in local, state or federal regulatory decision or action. The ability of regulatory decision makers to use academic studies to inform decisions is dependent on 1) the relevance of the experiment to regulatory decisions, 2) the reliability of the laboratory and the study itself, and 3) quality reporting of data such that study relevance and reliability are evident...
December 9, 2016: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/27869364/assessing-the-reliability-of-ecotoxicological-studies-an-overview-of-current-needs-and-approaches
#2
Cta Moermond, A Beasley, R Breton, M Junghans, R Laskowski, K Solomon, H Zahner
In general, reliable studies are well designed, performed, and enough details on study design and performance are reported to assess the study. For hazard and risk assessment in various legal frameworks, many different types of ecotoxicity studies need to be evaluated for reliability. These studies vary in study design, methodology, quality, and in the level of detail reported (e.g., reviews, peer-reviewed research papers, or industry-sponsored studies documented under Good Laboratory Practice (GLP) guidelines)...
November 21, 2016: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/27862919/ecotoxicological-hazard-and-risk-assessment-of-endocrine-active-substances
#3
Annegaaike Leopold, Mike Roberts, Peter Matthiessen
This collection of papers provides state-of-the-art science on a complex topic which has been challenging for scientists and regulators for a long time. The papers emanated from the SETAC Pellston Workshop™ 'Environmental Hazard and Risk Assessment Approaches for Endocrine-Active Substances (EHRA)'. Forty-eight international experts met in early February 2016 to discuss whether the environmental risks posed by endocrine-disrupting substances (EDS) can be reliably assessed. The primary conclusion of the workshop was that if data on environmental exposure, effects on sensitive species and life-stages, delayed effects and effects at low concentrations are robust, initiating environmental risk assessment of EDS is scientifically sound and reliable...
November 16, 2016: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/27862913/the-influence-of-particles-on-bioavailability-and-toxicity-of-pesticides-in-surface-water
#4
REVIEW
Katja Knauer, Nadzeya Homazava, Marion Junghans, Inge Werner
Environmental risk assessment is an essential part of the authorization and approval process for marketing of pesticides. To determine the risk of a substance or formulation for aquatic communities, exposure concentrations are calculated and compared to ecotoxicological data obtained from standardized OECD laboratory studies and, if available, from field studies. Predicted environmental concentrations (PEC) in surface waters are derived using e.g. the European FOCUS or the German Exposit models, which distinguish between exposure to dissolved and particle-associated pesticide concentrations, since the dissolved concentration is thought to be the best predictor of bioavailability and toxicity...
November 15, 2016: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/27862949/a-weight-of-evidence-approach-for-deriving-a-level-of-concern-for-atrazine-that-is-protective-of-aquatic-plant-communities
#5
Dwayne Rj Moore, Colleen D Greer, Gillian Manning, Katie Wooding, Kerrie J Beckett, Richard A Brain, Gary Marshall
Atrazine is a selective triazine herbicide widely used in the United States primarily for control of broadleaf weeds in corn and sorghum. In 2003, the U.S. Environmental Protection Agency (USEPA) concluded that atrazine poses potential risks to sensitive aquatic species. Consequently, a surface water monitoring program was developed to assess whether measured levels of atrazine could impact aquatic plants in vulnerable watersheds. To facilitate evaluation of the monitoring data, the Agency needed to determine a level of concern (LOC) below which atrazine would not cause unacceptable adverse effects to aquatic plant communities...
November 11, 2016: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/27862884/uncertainties-in-biological-responses-that-influence-hazard-and-risk-approaches-to-the-regulation-of-endocrine-active-substances
#6
Joanne L Parrott, Poul Bjerregaard, Kristin E Brugger, L Earl Gray, Taisen Iguchi, Sarah M Kadlec, Lennart Weltje, James R Wheeler
Endocrine Disrupting Substances (EDS) may have certain biological effects including delayed effects, multigenerational effects, and may display Non-Monotonic Dose Response (NMDR) relationships that require careful consideration when determining environmental hazards. EDS can have specific and profound effects when exposure occurs during sensitive windows of the lifecycle (development, reproduction). This creates the potential for delayed effects that manifest when exposure has ceased, possibly in a different life stage...
November 11, 2016: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/27791330/current-limitations-and-recommendations-to-improve-testing-for-the-environmental-assessment-of-endocrine-active-substances
#7
Katherine K Coady, Ronald C Biever, Nancy D Denslow, Melanie Gross, Patrick D Guiney, Henrik Holbech, Natalie K Karouna-Renier, Ioanna Katsiadaki, Hank Krueger, Steven L Levine, Gerd Maack, Mike Williams, Jeffrey C Wolf, Gerald T Ankley
In this paper existing regulatory frameworks and test systems for assessing potential endocrine-active chemicals are described, and associated challenges discussed, along with proposed approaches to address these challenges. Regulatory frameworks vary somewhat across geographies, but all basically evaluate whether a chemical possesses endocrine activity and whether this activity can result in adverse outcomes either to humans or the environment. Current test systems include in silico, in vitro and in vivo techniques focused on detecting potential endocrine activity, and in vivo tests that collect apical data to detect possible adverse effects...
October 28, 2016: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/27791328/development-and-application-of-benthic-algal-reference-condition-models-to-assess-stream-condition-in-the-south-nahanni-watershed
#8
Kathryn E Thomas, Roland I Hall, Garry J Scrimgeour
Monitoring biologists continually strive to improve the effectiveness of protocols to quantify environmental and ecological effects of anthropogenic activities. We developed and applied a reference condition approach (RCA) model to assess the ability of three descriptors of algal community structure (algal taxonomy, diatom taxonomy and algal pigments) to identify impairment in two northern rivers in the South Nahanni River Watershed, Northwest Territories, Canada. We established reference conditions by sampling 62 regional reference (i...
October 28, 2016: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/27787954/integrating-causation-in-investigative-ecological-weight-of-evidence-assessments
#9
Ryan W Stevenson, Peter M Chapman
Weight of evidence (WOE) frameworks integrate environmental assessment data to reach conclusions regarding relative certainty of adverse environmental effects due to stressors, possible causation, and key uncertainties. Such studies can be investigative (i.e., determining whether adverse impact is occurring to identify a need for management) or retrospective (i.e., determining the cause of a detected impact such that management efforts focus on the correct stressor). WOE assessments do not themselves definitively establish causation; they provide the basis for subsequent follow-up studies to further investigate causation...
October 27, 2016: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/27775206/an-improved-method-for-calculating-toxicity-based-pollutant-loads-part-2-application-to-contaminants-discharged-to-the-great-barrier-reef-queensland-australia
#10
Rachael A Smith, Michael St J Warne, Kerrie Mengersen, Ryan D R Turner
Pollutant loads are widely used to set pollution reduction targets and assess regulatory compliance for the protection of receiving waterbodies. However, when a pollutant load is comprised of a mixture of chemicals, reducing the overall load (mass) will not necessarily reduce the toxicity by a similar amount. This can be overcome by setting targets based on toxicity-based loads (toxic loads), where the load is modified according to the relative toxicity (expressed as toxic equivalency factors- TEFs) of each toxicant...
October 24, 2016: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/27743466/an-improved-method-for-calculating-toxicity-based-pollutant-loads-part-1-method-development
#11
Rachael A Smith, Michael St J Warne, Kerrie Mengersen, Ryan D R Turner
Pollutant loads are a means for assessing regulatory compliance and setting targets to reduce pollution entering receiving waterbodies. However, a pollutant load is often comprised of multiple chemicals, which may exert joint toxicity on biota. When the ultimate goal for assessing pollutant loads is to protect ecosystems from adverse effects of toxicants, then the total pollutant load needs to be calculated based on the principles of mixture toxicology. In this paper, an improved method is proposed to convert a pollutant load to a toxicity-based load (toxic load) using a modified toxic equivalency factor (TEF) derivation method...
October 15, 2016: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/27567128/particle-bound-metal-transport-after-removal-of-a-small-dam-in-the-pawtuxet-river-rhode-island-usa
#12
David R Katz, Mark G Cantwell, Julia C Sullivan, Monique M Perron, Robert M Burgess, Kay T Ho
The Pawtuxet River in Rhode Island, USA, has a long history of industrial activity and pollutant discharges. Metal contamination of the river sediments is well documented and historically exceeded toxicity thresholds for a variety of organisms. The Pawtuxet River dam, a low-head dam at the mouth of the river, was removed in August 2011. The removal of the dam was part of an effort to restore the riverine ecosystem after centuries of anthropogenic impact. Sediment traps were deployed below the dam to assess changes in metal concentrations and fluxes (Ag, Cd, Cr, Cu, Ni, Pb, and Zn) from the river system into Pawtuxet Cove...
October 6, 2016: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/27662428/towards-a-conceptual-approach-for-assessing-risks-from-chemical-mixtures-and-other-stressors-to-coastal-ecosystem-services
#13
Kristian Syberg, Gary Banta, Peter Bruce, Jonas S Gunnarsson, Mikael Gustavsson, Wayne R Munns, Robert Rämö, Henriette Selck, Thomas Backhaus
Growth of human populations and increased human activity, particularly in coastal areas, increase pressure on coastal ecosystems and the ecosystem services (ES) they provide. As a means toward being able to assess impact of multiple stressors on ES we here propose a seven-step conceptual approach for assessing effects of chemical mixtures and other stressors on ES in coastal areas: A: Identify the relevant problem(s) and policy aims B: identify temporal and spatial boundaries; C: identify relevant ES; D: identify relevant stressors (e...
September 23, 2016: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/27627787/remote-sensing-for-restoration-ecology-application-for-restoring-degraded-damaged-transformed-or-destroyed-ecosystems
#14
Molly K Reif, Heather J Theel
Restoration monitoring is generally perceived as costly and time-consuming, given the assumptions of successfully restoring ecological functions and services of a particular ecosystem or habitat. Opportunities exist for remote sensing to bolster the restoration science associated with a wide variety of injured resources, including resources affected by fire, hydropower operations, chemical releases and oil spills, among others. In the last decade, the role of remote sensing to support restoration monitoring has increased, in part due to the advent of high resolution satellite sensors as well as other sensor technology, such as lidar...
September 14, 2016: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/27626237/life-cycle-of-petroleum-biodegradation-metabolite-plumes-and-implications-for-risk-management-at-fuel-release-sites
#15
Dawn A Zemo, Kirk T O'Reilly, Rachel E Mohler, Renae I Magaw, Catalina Espino Devine, Sungwoo Ahn, Asheesh K Tiwary
This paper summarizes the results of a 5-year research study of the nature and toxicity of petroleum biodegradation metabolites in groundwater at fuel release sites that are quantified as diesel-range "Total Petroleum Hydrocarbons" (TPH; aka TPHd, DRO, etc.), unless a silica gel cleanup (SGC) step is used on the sample extract prior to the TPH analysis. This issue is important for site risk management in regulatory jurisdictions that use TPH as a metric; the presence of these metabolites may preclude site closure even if all other factors can be considered "low-risk...
September 14, 2016: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/27640422/a-dark-side-of-nature-natural-substances-as-dangerous-for-the-aquatic-environment
#16
Ursula Klaschka
No abstract text is available yet for this article.
October 2016: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/27640421/is-commercial-harvesting-of-beach-cast-seaweed-ecologically-sustainable
#17
Jessica J Holden, Sarah E Dudas, Francis Juanes
No abstract text is available yet for this article.
October 2016: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/27640420/long-term-field-data-set-supports-the-chloride-dependent-nitrite-guideline
#18
Tasha Hall, Jordana van Geest, Jonathan Love
No abstract text is available yet for this article.
October 2016: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/27640419/nitrate-and-nitrite-holding-time-study-completed-for-a-northern-canadian-mine
#19
Jonathan Love, Alison Humphries, Tasha Hall
No abstract text is available yet for this article.
October 2016: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/27640418/simple-but-effective-model-calibration-for-nitrite-in-northern-lakes
#20
Alison Snow, Jerry Vandenberg
No abstract text is available yet for this article.
October 2016: Integrated Environmental Assessment and Management
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