Research on the Controlled Ecological Risk of Reservoir Operation

2013 ◽  
Vol 742 ◽  
pp. 337-340
Author(s):  
Ting Gao ◽  
Ke Yang ◽  
Bin Wu ◽  
Lin Lin Zhang ◽  
Zi Chao Zhao ◽  
...  
Keyword(s):  
Risk Factors ◽  
Risk Assessment ◽  
Ecological Risk ◽  
Reservoir Operation ◽  
Ecological Risks ◽  
Water Network ◽  
Risk Transfer ◽  
Rivers And Lakes ◽  
Ecological Risk Factors

The lake rate and density of the water network the reservoir area generally increased after the impoundment of the reservoir, the original forest, farmland, villages were submerged, the water hydrographic characteristics was gradually changed from rivers to lakes - rivers and lakes type. In this context, this paper set out ecological risks caused by reservoir operation and planed ecological risk assessment works, summarized the classification of ecological risk factors and had the preliminary clarify in the risk transfer relationships.

scholarly journals The risk as a measure of ecological safety in watercourses

2014 ◽  
Vol 20 (1) ◽  
pp. 3-10 ◽  
Author(s):  
Elżbieta Bondar-Nowakowska ◽  
Justyna Hachoł
Keyword(s):  
Risk Factors ◽  
Risk Assessment ◽  
Ecological Risk ◽  
Ecological Risk Assessment ◽  
Hazard Analysis ◽  
Ecological Safety ◽  
Water Ecosystem ◽  
Technical Risk ◽  
Ecological Risk Factors

Abstract The study analyses possibilities of PHA (Preliminary Hazard Analysis) usage in ecological risk assessment conducted within technical risk assessment. The analysis was performed based on results obtained in a study performed between 2007 and 2013 in natural and modified lowland Lower Silesian watercourses. The object of the study was communities of hydromacrophytes being good indicators of the water ecosystem quality. The research constituted a base for the determination of ecological risk factors i.e. the probability of hazard occurrence and its effects. It allowed for the acquisition of the risk classification matrix which included three levels - low, medium and high.

scholarly journals Ecological Risks Due to Immunotoxicological Effects on Aquatic Organisms

2021 ◽  
Vol 22 (15) ◽  
pp. 8305
Author(s):  
Chisato Kataoka ◽  
Shosaku Kashiwada
Keyword(s):  
Risk Assessment ◽  
Ecological Risk ◽  
Ecological Risk Assessment ◽  
Marine Mammals ◽  
Pathogenic Bacteria ◽  
Aquatic Organisms ◽  
Ecological Risks ◽  
Histological Changes ◽  
Anthropogenic Pollutants ◽  
Tissue Changes

The immunotoxic effects of some anthropogenic pollutants on aquatic organisms are among the causes of concern over the presence of these pollutants in the marine environment. The immune system is part of an organism’s biological defense necessarily for homeostasis. Thus, the immunotoxicological impacts on aquatic organisms are important to understand the effects of pollutant chemicals in the aquatic ecosystem. When aquatic organisms are exposed to pollutant chemicals with immunotoxicity, it results in poor health. In addition, aquatic organisms are exposed to pathogenic bacteria, viruses, parasites, and fungi. Exposure to pollutant chemicals has reportedly caused aquatic organisms to show various immunotoxic symptoms such as histological changes of lymphoid tissue, changes of immune functionality and the distribution of immune cells, and changes in the resistance of organisms to infection by pathogens. Alterations of immune systems by contaminants can therefore lead to the deaths of individual organisms, increase the general risk of infections by pathogens, and probably decrease the populations of some species. This review introduced the immunotoxicological impact of pollutant chemicals in aquatic organisms, including invertebrates, fish, amphibians, and marine mammals; described typical biomarkers used in aquatic immunotoxicological studies; and then, discussed the current issues on ecological risk assessment and how to address ecological risk assessment through immunotoxicology. Moreover, the usefulness of the population growth rate to estimate the immunotoxicological impact of pollution chemicals was proposed.

scholarly journals Racial and Ethnic Comparison of Ecological Risk Factors and Youth Outcomes: A Test of the Desensitization Hypothesis

2020 ◽  
Vol 29 (10) ◽  
pp. 2722-2733
Author(s):  
Pan Chen ◽  
Dexter R. Voisin ◽  
Phillip L. Marotta ◽  
Kristen C. Jacobson
Keyword(s):  
Risk Factors ◽  
Ecological Risk ◽  
Youth Outcomes ◽  
Ecological Risk Factors

scholarly journals Socio-Ecological Risk Factors for Prime-Age Adult Death in Two Coastal Areas of Vietnam

PLoS ONE ◽  
2014 ◽  
Vol 9 (2) ◽  
pp. e89780 ◽  
Author(s):  
Deok Ryun Kim ◽  
Mohammad Ali ◽  
Vu Dinh Thiem ◽  
Thomas F. Wierzba
Keyword(s):  
Risk Factors ◽  
Ecological Risk ◽  
Coastal Areas ◽  
Ecological Risk Factors

scholarly journals Population growth rate as a basis for ecological risk assessment of toxic chemicals

2002 ◽  
Vol 357 (1425) ◽  
pp. 1299-1306 ◽  
Author(s):  
Valery E. Forbes ◽  
Peter Calow
Keyword(s):  
Risk Assessment ◽  
Growth Rate ◽  
Life Cycle ◽  
Population Growth ◽  
Ecological Risk ◽  
Population Growth Rate ◽  
Toxic Chemicals ◽  
Ecological Risks ◽  
Individual Level ◽  
Rate Analysis

Assessing the ecological risks of toxic chemicals is most often based on individual–level responses such as survival, reproduction or growth. Such an approach raises the following questions with regard to translating these measured effects into likely impacts on natural populations. (i) To what extent do individual–level variables underestimate or overestimate population–level responses? (ii) How do toxicant–caused changes in individual–level variables translate into changes in population dynamics for species with different life cycles? (iii) To what extent are these relationships complicated by population–density effects? These issues go to the heart of the ecological relevance of ecotoxicology and we have addressed them using the population growth rate as an integrating concept. Our analysis indicates that although the most sensitive individual–level variables are likely to be equally or more sensitive to increasing concentrations of toxic chemicals than population growth rate, they are difficult to identify a priori and, even if they could be identified, integrating impacts on key life–cycle variables via population growth rate analysis is nevertheless a more robust approach for assessing the ecological risks of chemicals. Populations living under density–dependent control may respond differently to toxic chemicals than exponentially growing populations, and greater care needs to be given to incorporating realistic density conditions (either experimentally or by simulation) into ecotoxicological test designs. It is impractical to expect full life–table studies, which record changes in survival, fecundity and development at defined intervals through the life cycle of organisms under specified conditions, for all relevant species, so we argue that population growth rate analysis should be used to provide guidance for a more pragmatic and ecologically sound approach to ecological risk assessment.

Developmental Trajectories of Behavior Problems Among Children Who Have Experienced Maltreatment

2010 ◽  
Vol 19 (4) ◽  
pp. 204-216 ◽  
Author(s):  
Jiyoung K. Tabone ◽  
Neil B. Guterman ◽  
Alan J. Litrownik ◽  
Howard Dubowitz ◽  
Patricia Isbell ◽  
...  
Keyword(s):  
Risk Factors ◽  
Behavior Problems ◽  
Problem Behaviors ◽  
Ecological Risk ◽  
Unobserved Heterogeneity ◽  
Developmental Trajectories ◽  
Specific Group ◽  
Maltreated Children ◽  
Abuse And Neglect ◽  
Ecological Risk Factors

The current study is a longitudinal investigation of unobserved heterogeneity in the developmental trajectories of problem behaviors among children who have experienced maltreatment. The goal of this study is to inform effective intervention plans with respect to behavior problems of maltreated children by examining the different trajectories of behavior problems and by assessing ecological risk factors related to each trajectory. This study utilized data from the Longitudinal Study of Child Abuse and Neglect, in which 827 maltreated children have been followed from age 4 to age 10. This study identified five distinctive developmental trajectories of maltreated children. In most trajectory groups, a specific set of ecological risk factors distinctively predicted the probability of membership in a specific group. The results are discussed with respect to individualized early intervention efforts toward those most likely to benefit.

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