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In this lesson, we'll take a closer look at how assessors estimate
risk.
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 The
goal of risk estimation is to integrate information from the
exposure and stressor-response profiles to determine how much
risk the stressor poses to an ecological entity. Any associated
uncertainties should also be evaluated.
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The basic risk questions are:
- Is it acute or chronic?
- What is the severity of effects?
- What is the time over which they occur?
- Is the risk to one species or many species?
- How many organisms are at risk?
Some approaches used to answer these questions and develop the
risk estimate are:
Let's look at each of these approaches, beginning with field surveys.
Relevant
guidelines section(s): 5.1
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