D10: Impact of Contaminants - Hydromod

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Integrated Water Resource Management for Important Deep European Lakes and their Catchment Areas EUROLAKES D10: Impact of Contaminants FP5_Contract No.: EVK1-CT1999-00004 Version: 4.0 Date: 25/07/01 File: D10-vers.4.0.doc Page 38 of 136 aquatic life or if other sentinel species should be identified and validated for assessing the state of ecosystems. Perhaps the development, validation, and use of amphibian and/or reptilian models would be appropriate in view of their widespread distribution and lack of information on these classes of vertebrates. Evaluations of ecological effect generally do not consider factors such as disease resistance (immune system dysfunction), behaviour (mating disruption), or reproductive viability of offspring (transgenerational effects). Consequently, there is a need to determine whether existing ecological effects/endpoints are adequate for assessing endocrine system perturbation. If not, then additional effects/endpoints are needed. Finally, there is a need to know what effects that occur at the earliest response threshold are relevant for further risk characterisation and what are the population, community, or ecosystem consequences of the effects observed in fish and wildlife.
Integrated Water Resource Management for Important Deep European Lakes and their Catchment Areas EUROLAKES D10: Impact of Contaminants FP5_Contract No.: EVK1-CT1999-00004 Version: 4.0 Date: 25/07/01 File: D10-vers.4.0.doc Page 39 of 136 6.5 ECOTOXICOLOGICAL RISK ASSESSMENT The word risk coming from the insurance industry means the occurrence probability of a damage event. A modern risk assessment of chemical substances not only have to take account on humans but also on the environment. The aim of the ecotoxicological risk assessment is the estimation of the hazardous impact to the ecosystem regarding the toxicological data of chemicals and the exposition. In doing so, both, the effects on organisms and populations and the pollution of environmental compartments like the ground water have to be estimated and evaluated [FENT 1998]. Exposition assessment Use Amount of input Characteristic of input Behaviour in the environment — Spread — Degradation — Metabolism Hazard evaluation Risk analysis Risk assessment Effect evaluation Ecotoxicological effects — Acute toxicity — Chronic toxicity — Toxicity to populations and ecosystem — bioaccumulation Occurrence probability Figure 6-2: hazardous evaluation of substances [FENT 1998]
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D10: Impact of Contaminants - Hydromod

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