scholarly journals Multiple lines of evidence risk assessment of american robins exposed to polychlorinated dibenzofurans (PCDFS) and polychlorinated dibenzo‐ P ‐dioxins (PCDDS) in the tittabawassee river floodplain, Midland, Michigan, Usa

2013 ◽  
Vol 32 (6) ◽  
pp. 1304-1316
Author(s):  
Dustin L. Tazelaar ◽  
Timothy B. Fredricks ◽  
Rita M. Seston ◽  
Sarah J. Coefield ◽  
Patrick W. Bradley ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Polychlorinated Dibenzofurans ◽  
River Floodplain ◽  
American Robins ◽  
Lines Of Evidence ◽  
Tittabawassee River

scholarly journals Multiple Lines of Evidence Risk Assessment of Terrestrial Passerines Exposed to PCDFs and PCDDs in the Tittabawassee River Floodplain, Midland, Michigan, USA

2011 ◽  
Vol 17 (1) ◽  
pp. 159-186 ◽  
Author(s):  
Timothy B. Fredricks ◽  
John P. Giesy ◽  
Sarah J. Coefield ◽  
Rita M. Seston ◽  
Dustin L. Tazelaar ◽  
...  
Keyword(s):  
Risk Assessment ◽  
River Floodplain ◽  
Lines Of Evidence ◽  
Tittabawassee River

Tissue-based risk assessment of great blue heron (Ardea herodias) exposed to PCDD/DF in the Tittabawassee River floodplain, Michigan, USA

2010 ◽  
Vol 29 (11) ◽  
pp. 2544-2558 ◽  
Author(s):  
Rita M. Seston ◽  
Timothy B. Fredricks ◽  
Dustin L. Tazelaar ◽  
Sarah J. Coefield ◽  
Patrick W. Bradley ◽  
...  
Keyword(s):  
Risk Assessment ◽  
River Floodplain ◽  
Ardea Herodias ◽  
Great Blue Heron ◽  
Tittabawassee River

Ecological risk assessment of great horned owls (Bubo virginianus) exposed to PCDD/DF in the Tittabawassee River floodplain in Midland, Michigan, USA

2010 ◽  
Vol 29 (10) ◽  
pp. 2341-2349 ◽  
Author(s):  
Sarah J. Coefield ◽  
Timothy B. Fredricks ◽  
Rita M. Seston ◽  
Michael W. Nadeau ◽  
Dustin L. Tazelaar ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Ecological Risk ◽  
Ecological Risk Assessment ◽  
Bubo Virginianus ◽  
River Floodplain ◽  
Tittabawassee River

Dietary- and tissue-based exposure of belted kingfisher to PCDFs and PCDDs in the Tittabawassee River floodplain, Midland, MI, USA

2012 ◽  
Vol 31 (5) ◽  
pp. 1158-1168 ◽  
Author(s):  
Rita M. Seston ◽  
John P. Giesy ◽  
Timothy B. Fredricks ◽  
Dustin L. Tazelaar ◽  
Sarah J. Coefield ◽  
...  
Keyword(s):  
River Floodplain ◽  
Tittabawassee River

scholarly journals ECOLOGICAL RISK ASSESSMENT (ERA) APPLICATION FOR THE EVALUATION OF IMPACTS ON NATURAL AQUATIC ECOSYSTEMS

2019 ◽  
Vol 22 ◽  
Author(s):  
ÉRIC CESAR PAGLIARINI ◽  
VANESSA BEZERRA DE MENEZES OLIVEIRA ◽  
EVALDO LUIZ GAETA ESPINDOLA
Keyword(s):  
Risk Assessment ◽  
Ecological Risk ◽  
Ecological Risk Assessment ◽  
Aquatic Ecosystems ◽  
Advanced Degree ◽  
Physical Chemical ◽  
Systemic Impact ◽  
Very High ◽  
Degree Of Degradation ◽  
Lines Of Evidence

Abstract The present research employs the Ecological Risk Assessment (ERA) method to evaluate the probability of adverse effects in the water supply of Bom Repouso (MG), a city where the agriculture has caused an advanced degree of degradation of its sources. The methodology is based on the integration of different variables, divided into three Lines of Evidence (chemical, physical-chemical and ecotoxicological), and allows for the evaluation of risk assessment between 0.0 and 1.0 in the sampled environment. Five sampling points were evaluated in three periods, with the results varying between the four possible ratings (from low to very high), and it was not possible to identify a pattern of risk evolution between them. Thus, the method used proved to be efficient in assessing the degree of degradation of the environment, however, additional studies are required to improve this type of systemic impact assessment, based on the evaluation of the environmental degradation.

Great horned owl (Bubo virginianus) dietary exposure to PCDD/DF in the Tittabawassee River floodplain in Midland, Michigan, USA

2010 ◽  
Vol 29 (10) ◽  
pp. 2350-2362 ◽  
Author(s):  
Sarah J. Coefield ◽  
Matthew J. Zwiernik ◽  
Timothy B. Fredricks ◽  
Rita M. Seston ◽  
Michael W. Nadeau ◽  
...  
Keyword(s):  
Dietary Exposure ◽  
Bubo Virginianus ◽  
River Floodplain ◽  
Tittabawassee River

scholarly journals A Blueprint for the Problem Formulation Phase of EPA-Type Ecological Risk Assessments for 316(b) Determinations

2002 ◽  
Vol 2 ◽  
pp. 271-298
Author(s):  
Webster Van Winkle ◽  
William P. Dey ◽  
Steve M. Jinks ◽  
Mark S. Bevlhimer ◽  
Charles C. Coutant
Keyword(s):  
Risk Assessment ◽  
Ecological Risk ◽  
Ecological Risk Assessment ◽  
Problem Formulation ◽  
Risk Assessments ◽  
Levels Of Analysis ◽  
Management Objectives ◽  
Ecological Risk Assessments ◽  
Generic Analysis ◽  
Lines Of Evidence

The difference between management objectives focused on sustainability of fish populations and the indigenous aquatic community, and a management objective focused on minimizing entrainment and impingement losses accounts for much of the ongoing controversy surrounding §316(b). We describe the EPA’s ecological risk assessment framework and recommend that this framework be used to more effectively address differences in management objectives and structure §316(b) determinations. We provide a blueprint for the problem formulation phase of EPA-type ecological risk assessments for cooling-water intake structures (CWIS) at existing power plant facilities. Our management objectives, assessment endpoints, conceptual model, and generic analysis plan apply to all existing facilities. However, adapting the problem formulation process for a specific facility requires consideration of the permitting agency’s guidelines and level of regulatory concern, as well as site-specific ecological and technical differences. The facility-specific problem formulation phase is designed around the hierarchy of biolo gical levels of organization in the generic conceptual model and the sequence of cause-effect events and risk hypotheses represented by this model. Problem formulation is designed to be flexible in that it can be tailored for facilities where §316(b) regulatory concern is low or high. For some facilities, we anticipate that the assessment can be completed based on consideration of susceptibility alone. At the other extreme, a high level of regulatory concern combined with the availability of extensive information and consideration of costly CWIS mitigation options may result in the ecological risk assessment relying on analyses at all levels. Decisions on whether to extend the ecological risk assessment to additional levels should be based on whether regulatory or generator concerns merit additional analyses and whether available information is adequate to support such analyses. In making these decisions, the functional dependence between levels of analysis must be considered in making the transition to the analysis phase and risk estimation component of the ecological risk assessment. Regardless of how the generic analysis plan is modified to develop a facility-specific analysis plan, the resulting plan should be viewed as a tool for comparing representative species and alternative CWIS options by focusing on relative changes (i.e., proportional or percent changes) in various measures. The analysis plan is specifically designed to encourage consideration of multiple lines of evidence and to characterize uncertainties in each line of evidence. Multiple lines of evidence from different levels of analysis, obtained using both prospective and retrospective techniques, provide a broader perspective on the magnitude of potential effects and associated uncertainties and risks. The implications of the EPA’s recent (April 2002) proposed regulations for existing facilities on the applicability of this blueprint are briefly considered.

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