66
Hazard from
accumulation in
planktonic foodchain and dietary
toxicity to fish
High
Moderate
Low
4. Protocol for Aquatic Hazard Assessment
and aquatic birds
Minimal
None
____
______- L_ _ _ _ _ _
_ _ _ _
<1
1-2
2-3
3-5
>5
Selenium in Water
FIGURE 4.1. Hazard profile for selenium accumulation from water into the planktonic food chain and resultant dietary toxicity to fish and aquatic birds. Waterborne selenium concentrations are for 0.45 llm filtered samples. This and
subsequent hazard profiles (Figs. 4.2-4.5) are based on a synthesis of toxicity,
bioaccumulation, and sediment data from the references listed at the end of
this chapter.
Hazard from
accumulation in
benthic foodchain and dietary
toxicity to fish
and aquatic birds
High
Moderate
Low
Minimal
None
____ ____ ______L-____
<1
1-2
2-3
3-4
>4
Selenium in sediments
dry weight)
FIGURE 4.2. Hazard profile for selenium accumulation from sediments into the
benthic food chain and resultant dietary toxicity to fish and aquatic birds.