Suzanne Simard and Trish Miller present: Using the Triad Approach for Terrestrial Ecological Risk Assessments
How many times have you calculated unacceptable risks to soil invertebrates and plants using standards or ECx, when a habitat or site inspection reveals an apparently healthy plant community? We know that the lower trophic level receptors are important receptors, as they typically have the greatest exposure and they form the foundation of the ecosystem. However, commonly used methods are frequently inadequate to determine what the impacts of contaminants are. In this presentation, we will discuss the application of an adaptive approach to terrestrial risk assessments where we have taken a triad approach, similar to what is commonly used for sediment quality risk assessments, incorporating basic ecology with chemistry and toxicity testing, to provide a strong assessment of risks to lower trophic level receptors.
We will describe how the approach evolved using examples from four contaminated sites we have applied this to, and our ideas for other sites we think this will be helpful for.
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